Articles | Volume 19, issue 5
https://doi.org/10.5194/bg-19-1395-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-1395-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
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08 Mar 2022
Research article | Highlight paper |
| 08 Mar 2022
| 08 Mar 2022
Bacterial and eukaryotic intact polar lipids point to in situ production as a key source of labile organic matter in hadal surface sediment of the Atacama Trench
Edgart Flores
CORRESPONDING AUTHOR
Programa de Postgrado en Oceanografía, Departamento de
Oceanografía, Facultad de Ciencias Naturales y Oceanográficas,
Universidad de Concepción, Concepción, Chile
Departamento de Oceanografía, Universidad de Concepción,
Casilla 160-C, Concepción, Chile
Millennium Institute of Oceanography, Universidad de Concepción,
Concepción, Chile
Sebastian I. Cantarero
Department of Geological Sciences and Institute of Arctic and Alpine
Research, University of Colorado Boulder, Boulder, CO 80309, USA
Paula Ruiz-Fernández
Programa de Postgrado en Oceanografía, Departamento de
Oceanografía, Facultad de Ciencias Naturales y Oceanográficas,
Universidad de Concepción, Concepción, Chile
Departamento de Oceanografía, Universidad de Concepción,
Casilla 160-C, Concepción, Chile
Millennium Institute of Oceanography, Universidad de Concepción,
Concepción, Chile
Nadia Dildar
Department of Geological Sciences and Institute of Arctic and Alpine
Research, University of Colorado Boulder, Boulder, CO 80309, USA
Matthias Zabel
MARUM – Center for Marine Environmental Sciences and Department of
Geosciences, University of Bremen, 28334 Bremen, Germany
Osvaldo Ulloa
Departamento de Oceanografía, Universidad de Concepción,
Casilla 160-C, Concepción, Chile
Millennium Institute of Oceanography, Universidad de Concepción,
Concepción, Chile
Julio Sepúlveda
CORRESPONDING AUTHOR
Millennium Institute of Oceanography, Universidad de Concepción,
Concepción, Chile
Department of Geological Sciences and Institute of Arctic and Alpine
Research, University of Colorado Boulder, Boulder, CO 80309, USA
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David J. Harning, Jonathan H. Raberg, Jamie M. McFarlin, Yarrow Axford, Christopher R. Florian, Kristín B. Ólafsdóttir, Sebastian Kopf, Julio Sepúlveda, Gifford H. Miller, and Áslaug Geirsdóttir
Hydrol. Earth Syst. Sci., 28, 4275–4293, https://doi.org/10.5194/hess-28-4275-2024, https://doi.org/10.5194/hess-28-4275-2024, 2024
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As human-induced global warming progresses, changes to Arctic precipitation are expected, but predictions are limited by an incomplete understanding of past changes in the hydrological system. Here, we measured water isotopes, a common tool to reconstruct past precipitation, from lakes, streams, and soils across Iceland. These data will allow robust reconstruction of past precipitation changes in Iceland in future studies.
Joshua Coupe, Nicole S. Lovenduski, Luise S. Gleason, Michael N. Levy, Kristen Krumhardt, Keith Lindsay, Charles Bardeen, Clay Tabor, Cheryl Harrison, Kenneth G. MacLeod, Siddhartha Mitra, and Julio Sepúlveda
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2024-94, https://doi.org/10.5194/gmd-2024-94, 2024
Preprint under review for GMD
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We develop a new feature in the atmosphere and ocean components of the Community Earth System Model version 2. We have implemented ultraviolet (UV) radiation inhibition of photosynthesis of four marine phytoplankton functional groups represented in the Marine Biogeochemistry Library. The new feature is tested with varying levels of UV radiation. The new feature will enable an analysis of an asteroid impact’s effect on the ozone layer and how that affects the base of the marine food web.
Sebastian I. Cantarero, Edgart Flores, Harry Allbrook, Paulina Aguayo, Cristian A. Vargas, John E. Tamanaha, J. Bentley C. Scholz, Lennart T. Bach, Carolin R. Löscher, Ulf Riebesell, Balaji Rajagopalan, Nadia Dildar, and Julio Sepúlveda
Biogeosciences, 21, 3927–3958, https://doi.org/10.5194/bg-21-3927-2024, https://doi.org/10.5194/bg-21-3927-2024, 2024
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Our study explores lipid remodeling in response to environmental stress, specifically how cell membrane chemistry changes. We focus on intact polar lipids in a phytoplankton community exposed to diverse stressors in a mesocosm experiment. The observed remodeling indicates acyl chain recycling for energy storage in intact polar lipids during stress, reallocating resources based on varying growth conditions. This understanding is essential to grasp the system's impact on cellular pools.
Nicolò Ardenghi, David J. Harning, Jonathan H. Raberg, Brooke R. Holman, Thorvaldur Thordarson, Áslaug Geirsdóttir, Gifford H. Miller, and Julio Sepúlveda
Clim. Past, 20, 1087–1123, https://doi.org/10.5194/cp-20-1087-2024, https://doi.org/10.5194/cp-20-1087-2024, 2024
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Analysing a sediment record from Stóra Viðarvatn (NE Iceland), we reveal how natural factors and human activities influenced environmental changes (erosion, wildfires) over the last 11 000 years. We found increased fire activity around 3000 and 1500 years ago, predating human settlement, likely driven by natural factors like precipitation shifts. Declining summer temperatures increased erosion vulnerability, exacerbated by farming and animal husbandry, which in turn may have reduced wildfires.
Babette Hoogakker, Catherine Davis, Yi Wang, Stepanie Kusch, Katrina Nilsson-Kerr, Dalton Hardisty, Allison Jacobel, Dharma Reyes Macaya, Nicolaas Glock, Sha Ni, Julio Sepúlveda, Abby Ren, Alexandra Auderset, Anya Hess, Katrina Meissner, Jorge Cardich, Robert Anderson, Christine Barras, Chandranath Basak, Harold Bradbury, Inda Brinkmann, Alexis Castillo, Madelyn Cook, Kassandra Costa, Constance Choquel, Paula Diz, Jonas Donnenfield, Felix Elling, Zeynep Erdem, Helena Filipsson, Sebastian Garrido, Julia Gottschalk, Anjaly Govindankutty Menon, Jeroen Groeneveld, Christian Hallman, Ingrid Hendy, Rick Hennekam, Wanyi Lu, Jean Lynch-Stieglitz, Lelia Matos, Alfredo Martínez-García, Giulia Molina, Práxedes Muñoz, Simone Moretti, Jennifer Morford, Sophie Nuber, Svetlana Radionovskaya, Morgan Raven, Christopher Somes, Anja Studer, Kazuyo Tachikawa, Raúl Tapia, Martin Tetard, Tyler Vollmer, Shuzhuang Wu, Yan Zhang, Xin-Yuan Zheng, and Yuxin Zhou
EGUsphere, https://doi.org/10.5194/egusphere-2023-2981, https://doi.org/10.5194/egusphere-2023-2981, 2024
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Paleo-oxygen proxies can extend current records, bound pre-anthropogenic baselines, provide datasets necessary to test climate models under different boundary conditions, and ultimately understand how ocean oxygenation responds on longer timescales. Here we summarize current proxies used for the reconstruction of Cenozoic seawater oxygen levels. This includes an overview of the proxy's history, how it works, resources required, limitations, and future recommendations.
David J. Harning, Brooke Holman, Lineke Woelders, Anne E. Jennings, and Julio Sepúlveda
Biogeosciences, 20, 229–249, https://doi.org/10.5194/bg-20-229-2023, https://doi.org/10.5194/bg-20-229-2023, 2023
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In order to better reconstruct the geologic history of the North Water Polynya, we provide modern validations and calibrations of lipid biomarker proxies in Baffin Bay. We find that sterols, rather than HBIs, most accurately capture the current extent of the North Water Polynya and will be a valuable tool to reconstruct its past presence or absence. Our local temperature calibrations for GDGTs and OH-GDGTs reduce the uncertainty present in global temperature calibrations.
Julia Gensel, Marc Steven Humphries, Matthias Zabel, David Sebag, Annette Hahn, and Enno Schefuß
Biogeosciences, 19, 2881–2902, https://doi.org/10.5194/bg-19-2881-2022, https://doi.org/10.5194/bg-19-2881-2022, 2022
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We investigated organic matter (OM) and plant-wax-derived biomarkers in sediments and plants along the Mkhuze River to constrain OM's origin and transport pathways within South Africa's largest freshwater wetland. Presently, it efficiently captures OM, so neither transport from upstream areas nor export from the swamp occurs. Thus, we emphasize that such geomorphological features can alter OM provenance, questioning the assumption of watershed-integrated information in downstream sediments.
David J. Harning, Brooke Holman, Lineke Woelders, Anne E. Jennings, and Julio Sepúlveda
Biogeosciences Discuss., https://doi.org/10.5194/bg-2021-177, https://doi.org/10.5194/bg-2021-177, 2021
Manuscript not accepted for further review
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In order to better reconstruct the geologic history of the North Water Polynya, we provide modern validations and calibrations of lipid biomarker proxies in Baffin Bay. We find that sterols, rather than HBIs, most accurately capture the current extent of the North Water Polynya and will be a valuable tool to reconstruct its past presence/absence. Our local temperature calibrations for alkenones, GDGTs and OH-GDGTs reduce the uncertainty present in global temperature calibrations.
Jonathan H. Raberg, David J. Harning, Sarah E. Crump, Greg de Wet, Aria Blumm, Sebastian Kopf, Áslaug Geirsdóttir, Gifford H. Miller, and Julio Sepúlveda
Biogeosciences, 18, 3579–3603, https://doi.org/10.5194/bg-18-3579-2021, https://doi.org/10.5194/bg-18-3579-2021, 2021
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BrGDGT lipids are a proxy for temperature in lake sediments, but other parameters like pH can influence them, and seasonality can affect the temperatures they record. We find a warm-season bias at 43 new high-latitude sites. We also present a new method that deconvolves the effects of temperature, pH, and conductivity and generate global calibrations for these variables. Our study provides new paleoclimate tools, insight into brGDGTs at the biochemical level, and a new method for future study.
David J. Harning, Anne E. Jennings, Denizcan Köseoğlu, Simon T. Belt, Áslaug Geirsdóttir, and Julio Sepúlveda
Clim. Past, 17, 379–396, https://doi.org/10.5194/cp-17-379-2021, https://doi.org/10.5194/cp-17-379-2021, 2021
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Today, the waters north of Iceland are characterized by high productivity that supports a diverse food web. However, it is not known how this may change and impact Iceland's economy with future climate change. Therefore, we explored how the local productivity has changed in the past 8000 years through fossil and biogeochemical indicators preserved in Icelandic marine mud. We show that this productivity relies on the mixing of Atlantic and Arctic waters, which migrate north under warming.
Annette Hahn, Enno Schefuß, Sergio Andò, Hayley C. Cawthra, Peter Frenzel, Martin Kugel, Stephanie Meschner, Gesine Mollenhauer, and Matthias Zabel
Clim. Past, 13, 649–665, https://doi.org/10.5194/cp-13-649-2017, https://doi.org/10.5194/cp-13-649-2017, 2017
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Our study demonstrates that a source to sink analysis in the Gouritz catchment can be used to obtain valuable paleoclimatic information form the year-round rainfall zone. In combination with SST reconstructions these data are a valuable contribution to the discussion of Southern Hemisphere palaeoenvironments and climate variability (in particular atmosphere–ocean circulation and hydroclimate change) in the South African Holocene.
Shuwen Sun, Enno Schefuß, Stefan Mulitza, Cristiano M. Chiessi, André O. Sawakuchi, Matthias Zabel, Paul A. Baker, Jens Hefter, and Gesine Mollenhauer
Biogeosciences, 14, 2495–2512, https://doi.org/10.5194/bg-14-2495-2017, https://doi.org/10.5194/bg-14-2495-2017, 2017
Related subject area
Biogeochemistry: Organic Biogeochemistry
Reviews and syntheses: Opportunities for robust use of peak intensities from high-resolution mass spectrometry in organic matter studies
Elemental stoichiometry of particulate organic matter across the Atlantic Ocean
Lipid remodeling in phytoplankton exposed to multi-environmental drivers in a mesocosm experiment
Controls on the composition of hydroxylated isoGDGTs in cultivated ammonia oxidizing Thaumarchaeota
Molecular-level carbon traits of fine roots: unveiling adaptation and decomposition under flooded conditions
Environmental controls on the distribution of brGDGTs and brGMGTs across the Seine River basin (NW France): implications for bacterial tetraethers as a proxy for riverine runoff
Ocean liming effects on dissolved organic matter dynamics
Latitudinal distribution of biomarkers across the western Arctic Ocean and the Bering Sea: an approach to assess sympagic and pelagic algal production
Results from a Multi-Laboratory Ocean Metaproteomic Intercomparison: Effects of LC-MS Acquisition and Data Analysis Procedures
Sinking fate and carbon export of zooplankton fecal pellets: insights from time-series sediment trap observations in the northern South China Sea
Microbial strong organic ligand production is tightly coupled to iron in hydrothermal plumes
Low cobalt inventories in the Amundsen and Ross seas driven by high demand for labile cobalt uptake among native phytoplankton communities
Methods to characterize type, relevance, and interactions of organic matter and microorganisms in fluids along the flow path of a geothermal facility
Potential bioavailability of representative pyrogenic organic matter compounds in comparison to natural dissolved organic matter pools
Distributions of bacteriohopanepolyols in lakes and coastal lagoons of the Azores Archipelago
Recently fixed carbon fuels microbial activity several meters below the soil surface
Environmental and hydrologic controls on sediment and organic carbon export from a subalpine catchment: insights from a time series
Climate and geology overwrite land use effects on soil organic nitrogen cycling on a continental scale
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean
Organic matter characteristics of a rapidly eroding permafrost cliff in NE Siberia (Lena Delta, Laptev Sea region)
Microbial labilization and diversification of pyrogenic dissolved organic matter
What can we learn from amino acids about oceanic organic matter cycling and degradation?
Bacteriohopanetetrol-x: constraining its application as a lipid biomarker for marine anammox using the water column oxygen gradient of the Benguela upwelling system
Active and passive fluxes of carbon, nitrogen, and phosphorus in the northern South China Sea
Cyanobacteria net community production in the Baltic Sea as inferred from profiling pCO2 measurements
Reviews and syntheses: Heterotrophic fixation of inorganic carbon – significant but invisible flux in environmental carbon cycling
Revised fractional abundances and warm-season temperatures substantially improve brGDGT calibrations in lake sediments
Archaeal intact polar lipids in polar waters: a comparison between the Amundsen and Scotia seas
Reproducible determination of dissolved organic matter photosensitivity
Technical note: Uncovering the influence of methodological variations on the extractability of iron-bound organic carbon
Anthropocene climate warming enhances autochthonous carbon cycling in an upland Arctic lake, Disko Island, West Greenland
Novel hydrocarbon-utilizing soil mycobacteria synthesize unique mycocerosic acids at a Sicilian everlasting fire
Alkenone isotopes show evidence of active carbon concentrating mechanisms in coccolithophores as aqueous carbon dioxide concentrations fall below 7 µmol L−1
Seasonal variability and sources of in situ brGDGT production in a permanently stratified African crater lake
Sediment release of dissolved organic matter to the oxygen minimum zone off Peru
Better molecular preservation of organic matter in an oxic than in a sulfidic depositional environment: evidence from Thalassiphora pelagica (Dinoflagellata, Eocene) cysts
Assessing branched tetraether lipids as tracers of soil organic carbon transport through the Carminowe Creek catchment (southwest England)
The nonconservative distribution pattern of organic matter in the Rajang, a tropical river with peatland in its estuary
Predominance of hexamethylated 6-methyl branched glycerol dialkyl glycerol tetraethers in the Mariana Trench: source and environmental implication
High-pH and anoxic conditions during soil organic matter extraction increases its electron-exchange capacity and ability to stimulate microbial Fe(III) reduction by electron shuttling
Sterol preservation in hypersaline microbial mats
Structural elucidation and environmental distributions of butanetriol and pentanetriol dialkyl glycerol tetraethers (BDGTs and PDGTs)
Distribution and degradation of terrestrial organic matter in the sediments of peat-draining rivers, Sarawak, Malaysian Borneo
Validation of carbon isotope fractionation in algal lipids as a pCO2 proxy using a natural CO2 seep (Shikine Island, Japan)
Composition and cycling of dissolved organic matter from tropical peatlands of coastal Sarawak, Borneo, revealed by fluorescence spectroscopy and parallel factor analysis
Latitudinal variations in δ30Si and δ15N signatures along the Peruvian shelf: quantifying the effects of nutrient utilization versus denitrification over the past 600 years
Diapycnal dissolved organic matter supply into the upper Peruvian oxycline
Composition and vertical flux of particulate organic matter to the oxygen minimum zone of the central Baltic Sea: impact of a sporadic North Sea inflow
Main drivers of transparent exopolymer particle distribution across the surface Atlantic Ocean
Biochemical and structural controls on the decomposition dynamics of boreal upland forest moss tissues
William Kew, Allison Myers-Pigg, Christine H. Chang, Sean M. Colby, Josie Eder, Malak M. Tfaily, Jeffrey Hawkes, Rosalie K. Chu, and James C. Stegen
Biogeosciences, 21, 4665–4679, https://doi.org/10.5194/bg-21-4665-2024, https://doi.org/10.5194/bg-21-4665-2024, 2024
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Natural organic matter (NOM) is often studied via Fourier transform mass spectrometry (FTMS), which identifies organic molecules as mass spectra peaks. The intensity of peaks is data that is often discarded due to technical concerns. We review the theory behind these concerns and show they are supported empirically. However, simulations show that ecological analyses of NOM data that include FTMS peak intensities are often valid. This opens a path for robust use of FTMS peak intensities for NOM.
Adam J. Fagan, Tatsuro Tanioka, Alyse A. Larkin, Jenna A. Lee, Nathan S. Garcia, and Adam C. Martiny
Biogeosciences, 21, 4239–4250, https://doi.org/10.5194/bg-21-4239-2024, https://doi.org/10.5194/bg-21-4239-2024, 2024
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Climate change is anticipated to influence the biological pump by altering phytoplankton nutrient distribution. In our research, we collected measurements of particulate matter concentrations during two oceanographic field studies. We observed systematic variations in organic matter concentrations and ratios across the Atlantic Ocean. From statistical modeling, we determined that these variations are associated with differences in the availability of essential nutrients for phytoplankton growth.
Sebastian I. Cantarero, Edgart Flores, Harry Allbrook, Paulina Aguayo, Cristian A. Vargas, John E. Tamanaha, J. Bentley C. Scholz, Lennart T. Bach, Carolin R. Löscher, Ulf Riebesell, Balaji Rajagopalan, Nadia Dildar, and Julio Sepúlveda
Biogeosciences, 21, 3927–3958, https://doi.org/10.5194/bg-21-3927-2024, https://doi.org/10.5194/bg-21-3927-2024, 2024
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Our study explores lipid remodeling in response to environmental stress, specifically how cell membrane chemistry changes. We focus on intact polar lipids in a phytoplankton community exposed to diverse stressors in a mesocosm experiment. The observed remodeling indicates acyl chain recycling for energy storage in intact polar lipids during stress, reallocating resources based on varying growth conditions. This understanding is essential to grasp the system's impact on cellular pools.
Devika Varma, Laura Villanueva, Nicole Bale, Pierre Offre, Gert-Jan Reichart, and Stefan Schouten
EGUsphere, https://doi.org/10.5194/egusphere-2024-1773, https://doi.org/10.5194/egusphere-2024-1773, 2024
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Archaeal hydroxylated tetraether lipids are increasingly used as temperature indicators in marine settings, but the factors influencing their distribution are still unclear. Analyzing membrane lipids of two Thaumarchaeotal strains showed that the growth phase of the cultures does not affect the lipid distribution, but growth temperature profoundly affects the degree of cyclization of these lipids. Also, the abundance of these lipids is species-specific and is not influenced by temperature.
Mengke Wang, Peng Zhang, Huishan Li, Guisen Deng, Deliang Kong, Sifang Kong, and Junjian Wang
Biogeosciences, 21, 2691–2704, https://doi.org/10.5194/bg-21-2691-2024, https://doi.org/10.5194/bg-21-2691-2024, 2024
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We developed and applied complementary analyses to characterize molecular-level carbon traits for water-grown and soil-grown fine roots. The adaptive strategy of developing more labile carbon in water-grown roots accelerated root decomposition and counteracted the decelerated effects of anoxia on decomposition, highlighting an indirect effect of environmental change on belowground carbon cycling.
Zhe-Xuan Zhang, Edith Parlanti, Christelle Anquetil, Jérôme Morelle, Anniet M. Laverman, Alexandre Thibault, Elisa Bou, and Arnaud Huguet
Biogeosciences, 21, 2227–2252, https://doi.org/10.5194/bg-21-2227-2024, https://doi.org/10.5194/bg-21-2227-2024, 2024
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Bacterial tetraethers have important implications for palaeoclimate reconstruction. However, fundamental understanding of how these lipids are transformed from land to sea and which environmental factors influence their distributions is lacking. Here, we investigate the sources of brGDGTs and brGMGTs and the factors controlling their distributions in a large dataset (n=237). We propose a novel proxy (RIX) to trace riverine runoff, which is applicable in modern systems and in paleorecord.
Chiara Santinelli, Silvia Valsecchi, Simona Retelletti Brogi, Giancarlo Bachi, Giovanni Checcucci, Mirco Guerrazzi, Elisa Camatti, Stefano Caserini, Arianna Azzellino, and Daniela Basso
EGUsphere, https://doi.org/10.5194/egusphere-2024-625, https://doi.org/10.5194/egusphere-2024-625, 2024
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To the best of our knowledge, there is no study investigating the impact of ocean liming on dissolved organic matter (DOM) dynamics. Given the central role played by DOM in the microbial loop, a change in its concentration and/or quality has a cascading effect the entire marine ecosystem. Our data clearly show that the addition of hydrated lime cause a reduction in DOM concentration and a change in its quality. The observed effects, detectable at pH 9, becomes significant at pH 10.
Youcheng Bai, Marie-Alexandrine Sicre, Jian Ren, Vincent Klein, Haiyan Jin, and Jianfang Chen
Biogeosciences, 21, 689–709, https://doi.org/10.5194/bg-21-689-2024, https://doi.org/10.5194/bg-21-689-2024, 2024
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Algal biomarkers were used to assess sea ice and pelagic algal production across the western Arctic Ocean with changing sea-ice conditions. They show three distinct areas along with a marked latitudinal gradient of sea ice over pelagic algal production in surface sediments that are reflected by the H-Print index. Our data also show that efficient grazing consumption accounted for the dramatic decrease of diatom-derived biomarkers in sediments compared to that of particulate matter.
Mak A. Saito, Jaclyn K. Saunders, Matthew R. McIlvin, Erin M. Bertrand, John A. Breier, Margaret Mars Brisbin, Sophie M. Colston, Jaimee R. Compton, Tim J. Griffin, W. Judson Hervey, Robert L. Hettich, Pratik D. Jagtap, Michael Janech, Rod Johnson, Rick Keil, Hugo Kleikamp, Dagmar Leary, Lennart Martens, J. Scott P. McCain, Eli Moore, Subina Mehta, Dawn M. Moran, Jaqui Neibauer, Benjamin A. Neely, Michael V. Jakuba, Jim Johnson, Megan Duffy, Gerhard J. Herndl, Richard Giannone, Ryan Mueller, Brook L. Nunn, Martin Pabst, Samantha Peters, Andrew Rajczewski, Elden Rowland, Brian Searle, Tim Van Den Bossche, Gary J. Vora, Jacob R. Waldbauer, Haiyan Zheng, and Zihao Zhao
EGUsphere, https://doi.org/10.5194/egusphere-2023-3148, https://doi.org/10.5194/egusphere-2023-3148, 2024
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The ability to assess the functional capabilities of microbes in the environment is of increasing interest. Metaproteomics, the ability to measure proteins across microbial populations, has been increasing in capability and popularity in recent years. Here, an international team of scientists conducted an intercomparison study using samples collected from the North Atlantic Ocean and observed consistency in the peptides and proteins identified, their functions, and taxonomic origins.
Hanxiao Wang, Zhifei Liu, Jiaying Li, Baozhi Lin, Yulong Zhao, Xiaodong Zhang, Junyuan Cao, Jingwen Zhang, Hongzhe Song, and Wenzhuo Wang
Biogeosciences, 20, 5109–5123, https://doi.org/10.5194/bg-20-5109-2023, https://doi.org/10.5194/bg-20-5109-2023, 2023
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The sinking of zooplankton fecal pellets is a key process in the marine biological carbon pump. This study presents carbon export of four shapes of fecal pellets from two time-series sediment traps in the South China Sea. The results show that the sinking fate of fecal pellets is regulated by marine primary productivity, deep-dwelling zooplankton community, and deep-sea currents in the tropical marginal sea, thus providing a new perspective for exploring the carbon cycle in the world ocean.
Colleen L. Hoffman, Patrick J. Monreal, Justine B. Albers, Alastair J. M. Lough, Alyson E. Santoro, Travis Mellett, Kristen N. Buck, Alessandro Tagliabue, Maeve C. Lohan, Joseph A. Resing, and Randelle M. Bundy
EGUsphere, https://doi.org/10.1101/2023.01.05.522639, https://doi.org/10.1101/2023.01.05.522639, 2023
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Hydrothermally-derived iron can be transported thousands of kilometers away from deep-sea vents, representing a significant flux of vital micronutrients to the ocean. However, the mechanisms that support the stabilization and transport of dissolved iron remain elusive. Using electrochemical methods, advanced mass spectrometry techniques, and genomic tools we demonstrate that strong microbially-produced ligands appear to exert an important control on plume iron biogeochemistry and dissemination.
Rebecca J. Chmiel, Riss M. Kell, Deepa Rao, Dawn M. Moran, Giacomo R. DiTullio, and Mak A. Saito
Biogeosciences, 20, 3997–4027, https://doi.org/10.5194/bg-20-3997-2023, https://doi.org/10.5194/bg-20-3997-2023, 2023
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Cobalt is an important micronutrient for plankton, yet it is often scarce throughout the oceans. A 2017/2018 expedition to coastal Antarctica, including regions of the Amundsen Sea and the Ross Sea, discovered lower concentrations of cobalt compared to two past expeditions in 2005 and 2006, particularly for the type of cobalt preferred as a nutrient by phytoplankton. This loss may be due to changing inputs of other nutrients, causing higher uptake of cobalt by plankton over the last decade.
Alessio Leins, Danaé Bregnard, Andrea Vieth-Hillebrand, Stefanie Poetz, Florian Eichinger, Guillaume Cailleau, Pilar Junier, and Simona Regenspurg
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-159, https://doi.org/10.5194/bg-2023-159, 2023
Revised manuscript accepted for BG
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Organic matter and microbial fluid analyses are rarely taken into account in the geothermal industry and research. However, they can have a significant effect on the efficiency of geothermal power production. We discovered a high variety in organic compound composition in our samples and were able to differentiate it with regard to various sources (e.g. artificial and biogenic). Furthermore, the microbial diversity undergoes significant changes within the flow path of a geothermal power plant.
Emily B. Graham, Hyun-Seob Song, Samantha Grieger, Vanessa A. Garayburu-Caruso, James C. Stegen, Kevin D. Bladon, and Allison N. Myers-Pigg
Biogeosciences, 20, 3449–3457, https://doi.org/10.5194/bg-20-3449-2023, https://doi.org/10.5194/bg-20-3449-2023, 2023
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Intensifying wildfires are increasing pyrogenic organic matter (PyOM) production and its impact on water quality. Recent work indicates that PyOM may have a greater impact on aquatic biogeochemistry than previously assumed, driven by higher bioavailability. We provide a full assessment of the potential bioavailability of PyOM across its chemical spectrum. We indicate that PyOM can be actively transformed within the river corridor and, therefore, may be a growing source of riverine C emissions.
Nora Richter, Ellen C. Hopmans, Danica Mitrović, Pedro M. Raposeiro, Vítor Gonçalves, Ana C. Costa, Linda A. Amaral-Zettler, Laura Villanueva, and Darci Rush
Biogeosciences, 20, 2065–2098, https://doi.org/10.5194/bg-20-2065-2023, https://doi.org/10.5194/bg-20-2065-2023, 2023
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Bacteriohopanepolyols (BHPs) are a diverse class of lipids produced by bacteria across a wide range of environments. This study characterizes the diversity of BHPs in lakes and coastal lagoons in the Azores Archipelago, as well as a co-culture enriched for methanotrophs. We highlight the potential of BHPs as taxonomic markers for bacteria associated with certain ecological niches, which can be preserved in sedimentary records.
Andrea Scheibe, Carlos A. Sierra, and Marie Spohn
Biogeosciences, 20, 827–838, https://doi.org/10.5194/bg-20-827-2023, https://doi.org/10.5194/bg-20-827-2023, 2023
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We explored carbon cycling in soils in three climate zones in Chile down to a depth of 6 m, using carbon isotopes. Our results show that microbial activity several meters below the soil surface is mostly fueled by recently fixed carbon and that strong decomposition of soil organic matter only occurs in the upper decimeters of the soils. The study shows that different layers of the critical zone are tightly connected and that processes in the deep soil depend on recently fixed carbon.
Melissa Sophia Schwab, Hannah Gies, Chantal Valérie Freymond, Maarten Lupker, Negar Haghipour, and Timothy Ian Eglinton
Biogeosciences, 19, 5591–5616, https://doi.org/10.5194/bg-19-5591-2022, https://doi.org/10.5194/bg-19-5591-2022, 2022
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The majority of river studies focus on headwater or floodplain systems, while often neglecting intermediate river segments. Our study on the subalpine Sihl River bridges the gap between streams and lowlands and demonstrates that moderately steep river segments are areas of significant instream alterations, modulating the export of organic carbon over short distances.
Lisa Noll, Shasha Zhang, Qing Zheng, Yuntao Hu, Florian Hofhansl, and Wolfgang Wanek
Biogeosciences, 19, 5419–5433, https://doi.org/10.5194/bg-19-5419-2022, https://doi.org/10.5194/bg-19-5419-2022, 2022
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Cleavage of proteins to smaller nitrogen compounds allows microorganisms and plants to exploit the largest nitrogen reservoir in soils and is considered the bottleneck in soil organic nitrogen cycling. Results from soils covering a European transect show that protein turnover is constrained by soil geochemistry, shifts in climate and associated alterations in soil weathering and should be considered as a driver of soil nitrogen availability with repercussions on carbon cycle processes.
Muhammed Fatih Sert, Helge Niemann, Eoghan P. Reeves, Mats A. Granskog, Kevin P. Hand, Timo Kekäläinen, Janne Jänis, Pamela E. Rossel, Bénédicte Ferré, Anna Silyakova, and Friederike Gründger
Biogeosciences, 19, 2101–2120, https://doi.org/10.5194/bg-19-2101-2022, https://doi.org/10.5194/bg-19-2101-2022, 2022
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We investigate organic matter composition in the Arctic Ocean water column. We collected seawater samples from sea ice to deep waters at six vertical profiles near an active hydrothermal vent and its plume. In comparison to seawater, we found that the organic matter in waters directly affected by the hydrothermal plume had different chemical composition. We suggest that hydrothermal processes may influence the organic matter distribution in the deep ocean.
Charlotte Haugk, Loeka L. Jongejans, Kai Mangelsdorf, Matthias Fuchs, Olga Ogneva, Juri Palmtag, Gesine Mollenhauer, Paul J. Mann, P. Paul Overduin, Guido Grosse, Tina Sanders, Robyn E. Tuerena, Lutz Schirrmeister, Sebastian Wetterich, Alexander Kizyakov, Cornelia Karger, and Jens Strauss
Biogeosciences, 19, 2079–2094, https://doi.org/10.5194/bg-19-2079-2022, https://doi.org/10.5194/bg-19-2079-2022, 2022
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Buried animal and plant remains (carbon) from the last ice age were freeze-locked in permafrost. At an extremely fast eroding permafrost cliff in the Lena Delta (Siberia), we found this formerly frozen carbon well preserved. Our results show that ongoing degradation releases substantial amounts of this carbon, making it available for future carbon emissions. This mobilisation at the studied cliff and also similarly eroding sites bear the potential to affect rivers and oceans negatively.
Aleksandar I. Goranov, Andrew S. Wozniak, Kyle W. Bostick, Andrew R. Zimmerman, Siddhartha Mitra, and Patrick G. Hatcher
Biogeosciences, 19, 1491–1514, https://doi.org/10.5194/bg-19-1491-2022, https://doi.org/10.5194/bg-19-1491-2022, 2022
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Wildfire-derived molecules are ubiquitous in the aquatic environment, but their biological fate remains understudied. We have evaluated the compositional changes that occur to wildfire-derived molecules after incubation with soil microbes. We observe a significant degradation but also a production of numerous new labile molecules. Our results indicate that wildfire-derived molecules can be broken down and the carbon and nitrogen therein can be incorporated into microbial food webs.
Birgit Gaye, Niko Lahajnar, Natalie Harms, Sophie Anna Luise Paul, Tim Rixen, and Kay-Christian Emeis
Biogeosciences, 19, 807–830, https://doi.org/10.5194/bg-19-807-2022, https://doi.org/10.5194/bg-19-807-2022, 2022
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Amino acids were analyzed in a large number of samples of particulate and dissolved organic matter from coastal regions and the open ocean. A statistical analysis produced two new biogeochemical indicators. An indicator of sinking particle and sediment degradation (SDI) traces the degradation of organic matter from the surface waters into the sediments. A second indicator shows the residence time of suspended matter in the ocean (RTI).
Zoë R. van Kemenade, Laura Villanueva, Ellen C. Hopmans, Peter Kraal, Harry J. Witte, Jaap S. Sinninghe Damsté, and Darci Rush
Biogeosciences, 19, 201–221, https://doi.org/10.5194/bg-19-201-2022, https://doi.org/10.5194/bg-19-201-2022, 2022
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Anaerobic ammonium oxidation (anammox) is an important nitrogen-removal process in the ocean. We assess the distribution of bacteriohopanetetrol-x (BHT-x), used to trace past anammox, along a redox gradient in the water column of the Benguela upwelling system. BHT-x / BHT ratios of >0.18 correspond to the presence of living anammox bacteria and oxygen levels <50 μmol L−1. This allows for a more robust application of BHT-x to trace past marine anammox and deoxygenation in dynamic marine systems.
Jia-Jang Hung, Ching-Han Tung, Zong-Ying Lin, Yuh-ling Lee Chen, Shao-Hung Peng, Yen-Huei Lin, and Li-Shan Tsai
Biogeosciences, 18, 5141–5162, https://doi.org/10.5194/bg-18-5141-2021, https://doi.org/10.5194/bg-18-5141-2021, 2021
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We report measured active and passive fluxes and their controlling mechanisms in the northern South China Sea (NSCS). The total fluxes were higher than most reports in open oceans, indicating the significance of NSCS in atmospheric CO2 uptake and in storing that CO2 in the ocean’s interior. Winter cooling and extreme events enhanced nutrient availability and elevated fluxes. Global warming may have profound impacts on reducing ocean’s uptake and storage of CO2 in subtropical–tropical oceans.
Jens Daniel Müller, Bernd Schneider, Ulf Gräwe, Peer Fietzek, Marcus Bo Wallin, Anna Rutgersson, Norbert Wasmund, Siegfried Krüger, and Gregor Rehder
Biogeosciences, 18, 4889–4917, https://doi.org/10.5194/bg-18-4889-2021, https://doi.org/10.5194/bg-18-4889-2021, 2021
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Based on profiling pCO2 measurements from a field campaign, we quantify the biomass production of a cyanobacteria bloom in the Baltic Sea, the export of which would foster deep water deoxygenation. We further demonstrate how this biomass production can be accurately reconstructed from long-term surface measurements made on cargo vessels in combination with modelled temperature profiles. This approach enables a better understanding of a severe concern for the Baltic’s good environmental status.
Alexander Braun, Marina Spona-Friedl, Maria Avramov, Martin Elsner, Federico Baltar, Thomas Reinthaler, Gerhard J. Herndl, and Christian Griebler
Biogeosciences, 18, 3689–3700, https://doi.org/10.5194/bg-18-3689-2021, https://doi.org/10.5194/bg-18-3689-2021, 2021
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It is known that CO2 fixation by photoautotrophic organisms is the major sink from the atmosphere. While biologists are aware that CO2 fixation also occurs in heterotrophic organisms, this route of inorganic carbon, and its quantitative role, is hardly recognized in biogeochemistry. We demonstrate that a considerable amount of CO2 is fixed annually through anaplerotic reactions in heterotrophic organisms, and a significant quantity of inorganic carbon is temporally sequestered in biomass.
Jonathan H. Raberg, David J. Harning, Sarah E. Crump, Greg de Wet, Aria Blumm, Sebastian Kopf, Áslaug Geirsdóttir, Gifford H. Miller, and Julio Sepúlveda
Biogeosciences, 18, 3579–3603, https://doi.org/10.5194/bg-18-3579-2021, https://doi.org/10.5194/bg-18-3579-2021, 2021
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BrGDGT lipids are a proxy for temperature in lake sediments, but other parameters like pH can influence them, and seasonality can affect the temperatures they record. We find a warm-season bias at 43 new high-latitude sites. We also present a new method that deconvolves the effects of temperature, pH, and conductivity and generate global calibrations for these variables. Our study provides new paleoclimate tools, insight into brGDGTs at the biochemical level, and a new method for future study.
Charlotte L. Spencer-Jones, Erin L. McClymont, Nicole J. Bale, Ellen C. Hopmans, Stefan Schouten, Juliane Müller, E. Povl Abrahamsen, Claire Allen, Torsten Bickert, Claus-Dieter Hillenbrand, Elaine Mawbey, Victoria Peck, Aleksandra Svalova, and James A. Smith
Biogeosciences, 18, 3485–3504, https://doi.org/10.5194/bg-18-3485-2021, https://doi.org/10.5194/bg-18-3485-2021, 2021
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Long-term ocean temperature records are needed to fully understand the impact of West Antarctic Ice Sheet collapse. Glycerol dialkyl glycerol tetraethers (GDGTs) are powerful tools for reconstructing ocean temperature but can be difficult to apply to the Southern Ocean. Our results show active GDGT synthesis in relatively warm depths of the ocean. This research improves the application of GDGT palaeoceanographic proxies in the Southern Ocean.
Alec W. Armstrong, Leanne Powers, and Michael Gonsior
Biogeosciences, 18, 3367–3390, https://doi.org/10.5194/bg-18-3367-2021, https://doi.org/10.5194/bg-18-3367-2021, 2021
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Living things decay into organic matter, which can dissolve into water (like tea brewing). Tea receives its color by absorbing light. Similarly, this material absorbs light, which can then cause chemical reactions that change it. By measuring changes in these optical properties, we found that materials from some places are more sensitive to light than others. Comparing sensitivity to light helps us understand where these materials come from and what happens as they move through water.
Ben J. Fisher, Johan C. Faust, Oliver W. Moore, Caroline L. Peacock, and Christian März
Biogeosciences, 18, 3409–3419, https://doi.org/10.5194/bg-18-3409-2021, https://doi.org/10.5194/bg-18-3409-2021, 2021
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Organic carbon can be protected from microbial degradation in marine sediments through association with iron minerals on 1000-year timescales. Despite the importance of this carbon sink, our spatial and temporal understanding of iron-bound organic carbon interactions globally is poor. Here we show that caution must be applied when comparing quantification of iron-bound organic carbon extracted by different methods as the extraction strength and method specificity can be highly variable.
Mark A. Stevenson, Suzanne McGowan, Emma J. Pearson, George E. A. Swann, Melanie J. Leng, Vivienne J. Jones, Joseph J. Bailey, Xianyu Huang, and Erika Whiteford
Biogeosciences, 18, 2465–2485, https://doi.org/10.5194/bg-18-2465-2021, https://doi.org/10.5194/bg-18-2465-2021, 2021
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We link detailed stable isotope and biomarker analyses from the catchments of three Arctic upland lakes on Disko Island (West Greenland) to a recent dated sediment core to understand how carbon cycling has changed over the past ~500 years. We find that the carbon deposited in sediments in these upland lakes is predominately sourced from in-lake production due to the catchment's limited terrestrial vegetation and elevation and that recent increases in algal production link with climate change.
Nadine T. Smit, Laura Villanueva, Darci Rush, Fausto Grassa, Caitlyn R. Witkowski, Mira Holzheimer, Adriaan J. Minnaard, Jaap S. Sinninghe Damsté, and Stefan Schouten
Biogeosciences, 18, 1463–1479, https://doi.org/10.5194/bg-18-1463-2021, https://doi.org/10.5194/bg-18-1463-2021, 2021
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Soils from an everlasting fire (gas seep) in Sicily, Italy, reveal high relative abundances of novel uncultivated mycobacteria and unique 13C-depleted mycocerosic acids (multi-methyl branched fatty acids) close to the main gas seep. Our results imply that mycocerosic acids in combination with their depleted δ13C values offer a new biomarker tool to study the role of soil mycobacteria as hydrocarbon consumers in the modern and past global carbon cycle.
Marcus P. S. Badger
Biogeosciences, 18, 1149–1160, https://doi.org/10.5194/bg-18-1149-2021, https://doi.org/10.5194/bg-18-1149-2021, 2021
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Reconstructing ancient atmospheric CO2 is an important aim of palaeoclimate science in order to understand the Earth's climate system. One method, the alkenone proxy based on molecular fossils of coccolithophores, has been recently shown to be ineffective at low-to-moderate CO2 levels. In this paper I show that this is likely due to changes in the biogeochemistry of the coccolithophores when there is low carbon availability, but for much of the Cenozoic the alkenone proxy should have utility.
Loes G. J. van Bree, Francien Peterse, Allix J. Baxter, Wannes De Crop, Sigrid van Grinsven, Laura Villanueva, Dirk Verschuren, and Jaap S. Sinninghe Damsté
Biogeosciences, 17, 5443–5463, https://doi.org/10.5194/bg-17-5443-2020, https://doi.org/10.5194/bg-17-5443-2020, 2020
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Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are used as a paleothermometer based on their temperature dependence in global soils, but aquatic production complicates their use in lakes. BrGDGTs in the water column of Lake Chala, East Africa, respond to oxygen conditions and mixing. Changes in their signal can be linked to bacterial community composition rather than membrane adaptation to changing conditions. Their integrated signal in the sediment reflects mean air temperature.
Alexandra N. Loginova, Andrew W. Dale, Frédéric A. C. Le Moigne, Sören Thomsen, Stefan Sommer, David Clemens, Klaus Wallmann, and Anja Engel
Biogeosciences, 17, 4663–4679, https://doi.org/10.5194/bg-17-4663-2020, https://doi.org/10.5194/bg-17-4663-2020, 2020
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We measured dissolved organic carbon (DOC), nitrogen (DON) and matter (DOM) optical properties in pore waters and near-bottom waters of the eastern tropical South Pacific off Peru. The difference between diffusion-driven and net fluxes of DOC and DON and qualitative changes in DOM optical properties suggested active microbial utilisation of the released DOM at the sediment–water interface. Our results suggest that the sediment release of DOM contributes to microbial processes in the area.
Gerard J. M. Versteegh, Alexander J. P. Houben, and Karin A. F. Zonneveld
Biogeosciences, 17, 3545–3561, https://doi.org/10.5194/bg-17-3545-2020, https://doi.org/10.5194/bg-17-3545-2020, 2020
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Anoxic sediments mostly contain much more organic matter than oxic ones, and therefore organic matter in anoxic settings is often considered to be preserved better than in oxic settings. However, through the analysis of the same fossil dinoflagellate cyst species from both oxic and anoxic settings, we show that at a molecular level the preservation in the oxic sediments may be better since in the anoxic setting the cyst macromolecule has been altered by postdepositional modification.
Jingjing Guo, Miriam Glendell, Jeroen Meersmans, Frédérique Kirkels, Jack J. Middelburg, and Francien Peterse
Biogeosciences, 17, 3183–3201, https://doi.org/10.5194/bg-17-3183-2020, https://doi.org/10.5194/bg-17-3183-2020, 2020
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The fluxes of soil organic carbon (OC) transport from land to sea are poorly constrained, mostly due to the lack of a specific tracer for soil OC. Here we evaluate the use of specific molecules derived from soil bacteria as a tracer for soil OC in a small river catchment. We find that the initial soil signal is lost upon entering the aquatic environment. However, the local environmental history of the catchment is reflected by these molecules in the lake sediments that act as their sink.
Zhuo-Yi Zhu, Joanne Oakes, Bradley Eyre, Youyou Hao, Edwin Sien Aun Sia, Shan Jiang, Moritz Müller, and Jing Zhang
Biogeosciences, 17, 2473–2485, https://doi.org/10.5194/bg-17-2473-2020, https://doi.org/10.5194/bg-17-2473-2020, 2020
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Samples were collected in August 2016 in the Rajang River and its estuary, with tropical forest in the river basin and peatland in the estuary. Organic matter composition was influenced by transportation in the river basin, whereas peatland added clear biodegraded parts to the fluvial organic matter, which implies modification of the initial lability and/or starting points in the subsequent degradation and alternation processes after the organic matter enters the sea.
Wenjie Xiao, Yasong Wang, Yongsheng Liu, Xi Zhang, Linlin Shi, and Yunping Xu
Biogeosciences, 17, 2135–2148, https://doi.org/10.5194/bg-17-2135-2020, https://doi.org/10.5194/bg-17-2135-2020, 2020
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The hadal zone (6–11 km depth) is the least explored habitat on Earth. We studied microbial branched glycerol dialkyl glycerol tetraethers (brGDGTs) in the Challenger Deep, Mariana Trench. One unique feature is the strong predominance of 6-methyl brGDGT, which likely reflects an adaption of brGDGT-producing bacteria to alkaline seawater and low temperature. BrGDGTs, with elemental and isotopic data, suggest an autochthonous product for brGDGT. A new approach is proposed for brGDGT sourcing.
Yuge Bai, Edisson Subdiaga, Stefan B. Haderlein, Heike Knicker, and Andreas Kappler
Biogeosciences, 17, 683–698, https://doi.org/10.5194/bg-17-683-2020, https://doi.org/10.5194/bg-17-683-2020, 2020
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Biogeochemical processes of SOM are key for greenhouse gas emission and water quality. We extracted SOM by water or by NaOH–HCl under oxic–anoxic conditions. Chemical and anoxic extractions lead to higher SOM electron exchange capacities, resulting in stimulation of microbial Fe(III) reduction. Therefore, aqueous pH-neutral SOM extracts should be used to reflect environmental SOM redox processes, and artifacts of chemical extractions need to be considered when evaluating SOM redox processes.
Yan Shen, Volker Thiel, Pablo Suarez-Gonzalez, Sebastiaan W. Rampen, and Joachim Reitner
Biogeosciences, 17, 649–666, https://doi.org/10.5194/bg-17-649-2020, https://doi.org/10.5194/bg-17-649-2020, 2020
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Today, sterols are widespread in plants, animals, and fungi but are almost absent in the oldest rocks. Microbial mats, representing the earliest complex ecosystems on Earth, were omnipresent in Precambrian marine environments and may have degraded the sterols at that time. Here we analyze the distribution of sterols through a microbial mat. This provides insight into how variations in biological and nonbiological factors affect the preservation of sterols in modern and ancient microbial mats.
Sarah Coffinet, Travis B. Meador, Lukas Mühlena, Kevin W. Becker, Jan Schröder, Qing-Zeng Zhu, Julius S. Lipp, Verena B. Heuer, Matthew P. Crump, and Kai-Uwe Hinrichs
Biogeosciences, 17, 317–330, https://doi.org/10.5194/bg-17-317-2020, https://doi.org/10.5194/bg-17-317-2020, 2020
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This study deals with two membrane lipids called BDGTs and PDGTs. Membrane lipids are molecules forming the cell envelope of all organisms. Different organisms produce different lipids thus they can be used to detect the presence of specific organisms in the environment. We analyzed the structure of these new lipids and looked for potential producers. We found that they are likely made by microbes emitting methane below the sediment surface and could be used to track these specific microbes.
Ying Wu, Kun Zhu, Jing Zhang, Moritz Müller, Shan Jiang, Aazani Mujahid, Mohd Fakharuddin Muhamad, and Edwin Sien Aun Sia
Biogeosciences, 16, 4517–4533, https://doi.org/10.5194/bg-16-4517-2019, https://doi.org/10.5194/bg-16-4517-2019, 2019
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Our understanding of terrestrial organic matter (TOM) in tropical peat-draining rivers remains limited, especially in Southeast Asia. We explored the characteristics of TOM via bulk parameters and lignin phenols of sediment in Malaysia. This showed that the most important plant source of the organic matter in these rivers is woody angiosperm C3 plants with limited diagenetic alteration. This slower degradation of TOM may be a link to higher total nitrogen content, especially for the small river.
Caitlyn R. Witkowski, Sylvain Agostini, Ben P. Harvey, Marcel T. J. van der Meer, Jaap S. Sinninghe Damsté, and Stefan Schouten
Biogeosciences, 16, 4451–4461, https://doi.org/10.5194/bg-16-4451-2019, https://doi.org/10.5194/bg-16-4451-2019, 2019
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Carbon dioxide concentrations (pCO2) in the atmosphere play an integral role in Earth system dynamics, especially climate. Past climates help us understand future ones, but reconstructing pCO2 over the geologic record remains a challenge. This research demonstrates new approaches for exploring past pCO2 via the carbon isotope fractionation in general algal lipids, which we test over a high CO2 gradient from a naturally occurring CO2 seep.
Yongli Zhou, Patrick Martin, and Moritz Müller
Biogeosciences, 16, 2733–2749, https://doi.org/10.5194/bg-16-2733-2019, https://doi.org/10.5194/bg-16-2733-2019, 2019
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We found that peatlands in coastal Sarawak, Borneo, export extremely humified organic matter, which dominates the riverine organic matter pool and conservatively mixes with seawater, while the freshly produced fraction is low and stable in concentration at all salinities. We estimated that terrigenous fractions, which showed high photolability, still account for 20 % of the coastal dissolved organic carbon pool, implying the importance of peat-derived organic matter in the coastal carbon cycle.
Kristin Doering, Claudia Ehlert, Philippe Martinez, Martin Frank, and Ralph Schneider
Biogeosciences, 16, 2163–2180, https://doi.org/10.5194/bg-16-2163-2019, https://doi.org/10.5194/bg-16-2163-2019, 2019
Alexandra N. Loginova, Sören Thomsen, Marcus Dengler, Jan Lüdke, and Anja Engel
Biogeosciences, 16, 2033–2047, https://doi.org/10.5194/bg-16-2033-2019, https://doi.org/10.5194/bg-16-2033-2019, 2019
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High primary production in the Peruvian upwelling system is followed by rapid heterotrophic utilization of organic matter and supports the formation of one of the most intense oxygen minimum zones (OMZs) in the world. Here, we estimated vertical fluxes of oxygen and dissolved organic matter (DOM) from the surface to the OMZ. Our results suggest that DOM remineralization substantially reduces oxygen concentration in the upper water column and controls the shape of the upper oxycline.
Carolina Cisternas-Novoa, Frédéric A. C. Le Moigne, and Anja Engel
Biogeosciences, 16, 927–947, https://doi.org/10.5194/bg-16-927-2019, https://doi.org/10.5194/bg-16-927-2019, 2019
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We investigate the composition and vertical fluxes of POM in two deep basins of the Baltic Sea (GB: Gotland Basin and LD: Landsort Deep). The two basins showed different O2 regimes resulting from the intrusion of oxygen-rich water from the North Sea that ventilated the deep waters in GB, but not in LD.
In GB, O2 intrusions lead to a high abundance of manganese oxides that aggregate with POM, altering its composition and vertical flux and contributing to a higher POC transfer efficiency in GB.
Marina Zamanillo, Eva Ortega-Retuerta, Sdena Nunes, Pablo Rodríguez-Ros, Manuel Dall'Osto, Marta Estrada, Maria Montserrat Sala, and Rafel Simó
Biogeosciences, 16, 733–749, https://doi.org/10.5194/bg-16-733-2019, https://doi.org/10.5194/bg-16-733-2019, 2019
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Many marine microorganisms produce polysaccharide-rich transparent exopolymer particles (TEPs) for rather unknown reasons but with important consequences for the ocean carbon cycle, sea–air gas exchange and formation of organic aerosols. Here we compare surface–ocean distributions of TEPs and physical, chemical and biological variables along a N–S transect in the Atlantic Ocean. Our data suggest that phytoplankton and not bacteria are the main TEP producers, and solar radiation acts as a sink.
Michael Philben, Sara Butler, Sharon A. Billings, Ronald Benner, Kate A. Edwards, and Susan E. Ziegler
Biogeosciences, 15, 6731–6746, https://doi.org/10.5194/bg-15-6731-2018, https://doi.org/10.5194/bg-15-6731-2018, 2018
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We explored the relationship between chemical composition and the temperature sensitivity of moss decomposition using 959-day lab incubations. Mass loss was low despite the predominance of carbohydrates, indicating the persistence of labile C. Scanning electron microscopy revealed little change in the moss cell-wall structure. These results suggest that the moss cell-wall matrix protects labile C from decomposition, contributing to the globally important stocks of moss-derived C.
Cited articles
Ahumada, R.: Producción y destino de la biomasa fitoplanctónica en
un sistema de bahías en Chile central: una hipótesis, Biol.
Pesq. Chile, 18, 53–66, 1989.
Allemann, M. N. and Allen, E. E.: Genetic suppression of lethal mutations in
fatty acid biosynthesis mediated by a secondary lipid synthase, Appl.
Environ. Microbiol., 87, e00035-21, https://doi.org/10.1128/AEM.00035-21, 2021.
Allen, E. E., Facciotti, D., and Bartlett, D. H.: Monounsaturated but not
polyunsaturated fatty acids are required for growth of the deep-sea
bacteriumPhotobacterium profundum SS9 at high pressure and low temperature,
Appl. Environ. Microbiol., 65, 1710–1720, 1999.
Angel, M.: Detrital organic fluxes through pelagic ecosystems, in: Flows of
energy and materials in marine ecosystems, Springer, Boston, MA, 475–516, https://doi.org/10.1007/978-1-4757-0387-0_19, 1984.
Angel, M. V.: Ocean trench conservation, Environmentalist, 2, 1–17, 1982.
Araki, S., Eichenberger, W., Sakurai, T., and Sato, N.: Distribution of
diacylglycerylhydroxymethyltrimethyl-β-alanine (DGTA) and
phosphatidylcholine in brown algae, Plant Cell Physiol., 32, 623–628, 1991.
Baird, B.: Biomass and community structure of the abyssal microbiota
determined from basin and Puerto Rico trench sediments, Benthic Ecol.
Sediment. Process. Venezuela Basin – Past Present, 61, 217–213, 1985.
Bao, R., Strasser, M., McNichol, A. P., Haghipour, N., McIntyre, C., Wefer,
G., and Eglinton, T. I.: Tectonically-triggered sediment and carbon export
to the Hadal zone, Nat. Commun., 9, 1–8, 2018.
Barridge, J. K. and Shively, J.: Phospholipids of the Thiobacilli, J.
Bacteriol., 95, 2182–2185, 1968.
Batrakov, S. G. and Nikitin, D. I.: Lipid composition of the
phosphatidylcholine-producing bacterium Hyphomicrobium vulgare NP-160,
Biochim. Biophys. Acta BBA-Lipids Lipid Metab., 1302, 129–137, 1996.
Benning, C., Huang, Z.-H., and Gage, D. A.: Accumulation of a novel
glycolipid and a betaine lipid in cells of Rhodobacter sphaeroides grown
under phosphate limitation, Arch. Biochem. Biophys., 317, 103–111, 1995.
Bergé, J.-P. and Barnathan, G.: Fatty acids from lipids of marine
organisms: molecular biodiversity, roles as biomarkers, biologically active
compounds, and economical aspects, Mar. Biotechnol. I, 96, 49–125, 2005.
Biddle, J. F., Lipp, J. S., Lever, M. A., Lloyd, K. G., Sørensen, K. B.,
Anderson, R., Fredricks, H. F., Elvert, M., Kelly, T. J., Schrag, D. P., Sogin, M. L., Brenchley, J. E., Teske, A., House, C. H., and Hinrichs, K.-U.: Heterotrophic Archaea dominate sedimentary subsurface ecosystems off
Peru, P. Natl. Acad. Sci. USA, 103, 3846–3851, 2006.
Billett, D., Lampitt, R., Rice, A., and Mantoura, R.: Seasonal sedimentation
of phytoplankton to the deep-sea benthos, Nature, 302, 520–522, 1983.
Bligh, E. G. and Dyer, W. J.: A rapid method of total lipid extraction and
purification, Can. J. Biochem. Physiol., 37, 911–917, 1959.
Boyer, G. M., Schubotz, F., Summons, R. E., Woods, J., and Shock, E. L.:
Carbon oxidation state in microbial polar lipids suggests adaptation to hot
spring temperature and redox gradients, Front. Microbiol., 11, 229, https://doi.org/10.3389/fmicb.2020.00229, 2020.
Brandsma, J., Hopmans, E. C., Philippart, C. J. M., Veldhuis, M. J. W., Schouten, S., and Sinninghe Damsté, J. S.: Low temporal variation in the intact polar lipid composition of North Sea coastal marine water reveals limited chemotaxonomic value, Biogeosciences, 9, 1073–1084, https://doi.org/10.5194/bg-9-1073-2012, 2012.
Bühring, S. I., Kamp, A., Wörmer, L., Ho, S., and Hinrichs, K.-U.:
Functional structure of laminated microbial sediments from a supratidal
sandy beach of the German Wadden Sea (St. Peter-Ording), J. Sea Res., 85,
463–473, 2014.
Cañavate, J. P., Armada, I., and Hachero-Cruzado, I.: Interspecific
variability in phosphorus-induced lipid remodelling among marine eukaryotic
phytoplankton, New Phytol., 213, 700–713, 2017.
Cantarero, S. I., Henríquez-Castillo, C., Dildar, N., Vargas, C. A.,
Von Dassow, P., Cornejo-D'Ottone, M., and Sepúlveda, J.:
Size-fractionated contribution of microbial biomass to suspended organic
matter in the eastern Tropical South Pacific oxygen minimum zone, Front.
Mar. Sci., 7, 745 pp., 2020.
Carini, P., Van Mooy, B. A., Thrash, J. C., White, A., Zhao, Y., Campbell,
E. O., Fredricks, H. F., and Giovannoni, S. J.: SAR11 lipid renovation in
response to phosphate starvation, P. Natl. Acad. Sci. USA, 112, 7767–7772,
2015.
Clarke, K. and Gorley, R.: Getting started with PRIMER v7, Primer-E Plymouth
Plymouth Mar. Lab., 20, 1–18, 2015.
da Costa, E., Amaro, H. M., Melo, T., Guedes, A. C., and Domingues, M. R.:
Screening for polar lipids, antioxidant, and anti-inflammatory activities of
Gloeothece sp. lipid extracts pursuing new phytochemicals from
cyanobacteria, J. Appl. Phycol., 32, 3015–3030, 2020.
Danovaro, R., Della Croce, N., Dell'Anno, A., and Pusceddu, A.: A depocenter
of organic matter at 7800 m depth in the SE Pacific Ocean, Deep-Sea Res.
Pt. I, 50, 1411–1420, 2003.
Danovaro, R., Snelgrove, P. V., and Tyler, P.: Challenging the paradigms of
deep-sea ecology, Trends Ecol. Evol., 29, 465–475, 2014.
DeLong, E. F. and Yayanos, A. A.: Adaptation of the membrane lipids of a
deep-sea bacterium to changes in hydrostatic pressure, Science, 228,
1101–1103, 1985.
Dembitsky, V. M.: Betaine ether-linked glycerolipids: chemistry and biology,
Prog. Lipid Res., 35, 1–51, 1996.
Dowhan, W.: Molecular basis for membrane phospholipid diversity: why are
there so many lipids?, Annu. Rev. Biochem., 66, 199–232, 1997.
Eichenberger, W. and Gribi, C.: Lipids of Pavlova lutheri: cellular site and
metabolic role of DGCC, Phytochemistry, 45, 1561–1567, 1997.
Eloe, E. A., Shulse, C. N., Fadrosh, D. W., Williamson, S. J., Allen, E. E.,
and Bartlett, D. H.: Compositional differences in particle-associated and
free-living microbial assemblages from an extreme deep-ocean environment,
Environ. Microbiol. Rep., 3, 449–458, 2011.
Fang, J., Barcelona, M. J., Nogi, Y., and Kato, C.: Biochemical implications
and geochemical significance of novel phospholipids of the extremely
barophilic bacteria from the Marianas Trench at 11,000 m, Deep-Sea Res. Pt. I, 47, 1173–1182, 2000.
Fernández-Urruzola, I., Ulloa, O., Glud, R., Pinkerton, M., Schneider
W., Wenzhöfer, F., and Escribano, R: Plankton respiration in the Atacama
Trench region: Implications for particulate organic carbon fux into the
hadal realm, Limnol. Oceanogr., 66, 3134–3148, https://doi.org/10.1002/lno.11866, 2021.
Fischer, J. P., Ferdelman, T. G., D'Hondt, S., Røy, H., and Wenzhöfer, F.: Oxygen penetration deep into the sediment of the South Pacific gyre, Biogeosciences, 6, 1467–1478, https://doi.org/10.5194/bg-6-1467-2009, 2009.
Flores, E.: EdgartFlores/IPLs-Atacama-Trench-, v1.0.0, Zenodo [data set], https://doi.org/10.5281/zenodo.6325647, 2022.
Gao, Y., Du, X. Xu, W., Fan, R., Zhang, X., Yang, S., Chen, X., Lv, J.,
and Luo, Z.: Fungal diversity in deep sea sediments from east yap trench and
their denitrification potential, Geomicrobiol. J., 37, 848–858, 2020.
Gašparović, B., Penezić, A., Frka, S., Kazazić, S., Lampitt,
R. S., Holguin, F. O., Sudasinghe, N., and Schaub, T.: Particulate
sulfur-containing lipids: Production and cycling from the epipelagic to the
abyssopelagic zone, Deep-Sea Res. Pt. I, 134, 12–22,
2018.
Geiger, O., Röhrs, V., Weissenmayer, B., Finan, T. M., and Thomas-Oates,
J. E.: The regulator gene phoB mediates phosphate stress-controlled
synthesis of the membrane lipid diacylglyceryl-N, N, N-trimethylhomoserine
in Rhizobium (Sinorhizobium) meliloti, Mol. Microbiol., 32, 63–73, 1999.
Glud, R. N., Wenzhöfer, F., Middelboe, M., Oguri, K., Turnewitsch, R.,
Canfield, D. E., and Kitazato, H.: High rates of microbial carbon turnover
in sediments in the deepest oceanic trench on Earth, Nat. Geosci., 6,
284–288, 2013.
Glud, R. N., Berg, P., Thamdrup, B., Larsen, M., Stewart, H. A., Jamieson,
A. J., Glud, A., Oguri, K., Sanei, H., Rowden, A. A., and Wenzhöfer, F.: Hadal
trenches are dynamic hotspots for early diagenesis in the deep sea, Commun.
Earth Environ., 2, 1–8, 2021.
Goldfine, H.: Bacterial membranes and lipid packing theory, J. Lipid Res.,
25, 1501–1507, 1984.
Goldfine, H. and Hagen, P.-O.: N-Methyl groups in bacterial lipids III.
phospholipids of hyphomicrobia, J. Bacteriol., 95, 367–375, 1968.
Gombos, Z., Várkonyi, Z., Hagio, M., Iwaki, M., Kovács, L.,
Masamoto, K., Itoh, S., and Wada, H.: Phosphatidylglycerol requirement for
the function of electron acceptor plastoquinone QB in the photosystem II
reaction center, Biochemistry, 41, 3796–3802, 2002.
Gómez-Consarnau, L., González, J. M., Coll-Lladó, M., Gourdon,
P., Pascher, T., Neutze, R., Pedrós-Alió, C., and Pinhassi, J.:
Light stimulates growth of proteorhodopsin-containing marine Flavobacteria,
Nature, 445, 210–213, 2007.
Gooday, A. J., Bett, B. J., Escobar, E., Ingole, B., Levin, L. A., Neira,
C., Raman, A. V., and Sellanes, J.: Habitat heterogeneity and its influence
on benthic biodiversity in oxygen minimum zones, Mar. Ecol., 31, 125–147,
2010.
Gounaris, K. and Barber, J.: Monogalactosyldiacylglycerol: the most abundant
polar lipid in nature, Trends Biochem. Sci., 8, 378–381, 1983.
Gutiérrez, M. H., Vera J., Srain B., Quiñones, R. A., Wörmer L.,
Hinrichs K.-U., and Pantoja, S.: Biochemical fingerprints of marine fungi:
implications for trophic and biogeochemical studies, Aquat. Microb. Ecol., 84, 75–90, https://doi.org/10.3354/ame01927,
2020.
Guan, H., Chen, L., Luo, M., Liu, L., Mao, S., Ge, H., Zhang, M., Fang, J.,
and Chen, D.: Composition and origin of lipid biomarkers in the surface
sediments from the southern Challenger Deep, Mariana Trench, Geosci. Front.,
10, 351–360, 2019.
Grabowski, E., Letelier, R. M., Laws, E. A., and Karl, D. M.: Coupling
carbon and energy fluxes in the North Pacific Subtropical Gyre, Nat.
Commun., 10, 1895, https://doi.org/10.1038/s41467-019-09772-z, 2019.
Hand, K., Bartlett, D., Fryer, P., Peoples, L., Williford, K., Hofmann, A.,
and Cameron, J.: Discovery of novel structures at 10.7 km depth in the
Mariana Trench may reveal chemolithoautotrophic microbial communities, Deep-Sea Res. Pt. I, 160, 103238, https://doi.org/10.1016/j.dsr.2020.103238, 2020.
Harvey, H. R., Fallon, R. D., and Patton, J. S.: The effect of organic
matter and oxygen on the degradation of bacterial membrane lipids in marine
sediments, Geochim. Cosmochim. Ac., 50, 795–804, 1986.
Harwood, J. L.: Membrane lipids in algae, in: Lipids in photosynthesis:
structure, function and genetics, Springer, Dordrecht, 53–64, https://doi.org/10.1007/0-306-48087-5_3, 1998.
Hedges, J. I., Baldock, J. A., Gélinas, Y., Lee, C., Peterson, M., and
Wakeham, S. G.: Evidence for non-selective preservation of organic matter in
sinking marine particles, Nature, 409, 801–804, 2001.
Heinz, E.: Enzymatic reactions in galactolipid biosynthesis, in: Lipids and
lipid polymers in higher plants, Springer, Berlin, Heidelberg, 102–120, https://doi.org/10.1007/978-3-642-66632-2_6, 1977.
Hiraoka, S., Hirai, M., Matsui, Y., Makabe, A., Minegishi, H., Tsuda, M.,
Rastelli, E., Danovaro, R., Corinaldesi, C., Kitahashi, T., Tasumi, E., Nishizawa, M., Takai, K., Nomaki, H., and Nunoura, T.:
Microbial community and geochemical analyses of trans-trench sediments for
understanding the roles of hadal environments, ISME J., 14, 740–756, 2020.
Houston, J.: Variability of precipitation in the Atacama Desert: its causes
and hydrological impact, Int. J. Climatol. J. R. Meteorol. Soc., 26,
2181–2198, 2006.
Hunter, J. E.: Phytoplankton lipidomics: lipid dynamics in response to
microalgal stressors, PhD Thesis, University of Southampton, https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.675198 (last access: 3 March 2022), 2015.
Ichino, M. C., Clark, M. R., Drazen, J. C., Jamieson, A., Jones, D. O.,
Martin, A. P., Rowden, A. A., Shank, T. M., Yancey, P. H., and Ruhl, H. A.:
The distribution of benthic biomass in hadal trenches: a modelling approach
to investigate the effect of vertical and lateral organic matter transport
to the seafloor, Deep-Sea Res. Pt. I, 100, 21–33, 2015.
Imhoff, J. F.: Taxonomy and physiology of phototrophic purple bacteria and
green sulfur bacteria, in: Anoxygenic photosynthetic bacteria, Springer, Dordrecht,
1–15, https://doi.org/10.1007/0-306-47954-0_1, 1995.
Inthorn, M., Wagner, T., Scheeder, G., and Zabel, M.: Lateral transport
controls distribution, quality, and burial of organic matter along
continental slopes in high-productivity areas, Geology, 34, 205–208, 2006.
Itou, M., Matsumura, I., and Noriki, S.: A large flux of particulate matter
in the deep Japan Trench observed just after the 1994 Sanriku-Oki
earthquake, Deep-Sea Res. Pt. I, 47, 1987–1998, 2000.
Itoh, M., Kawamura, K., Kitahashi, T., Kojima, S., Katagiri, H., and
Shimanaga, M.: Bathymetric patterns of meiofaunal abundance and biomass
associated with the Kuril and Ryukyu trenches, western North Pacific Ocean,
Deep-Sea Res. Pt. I, 58, 86–97, 2011.
Jahnke, R. A. and Jahnke, D. B.: Rates of C, N, P and Si recycling and
denitrification at the US Mid-Atlantic continental slope depocenter, Deep-Sea Res. Pt. I, 47, 1405–1428, 2000.
Jahnke, R. A., Reimers, C. E., and Craven, D. B.: Intensification of
recycling of organic matter at the sea floor near ocean margins, Nature,
348, 50–54, 1990.
Jamieson, A. J., Fujii, T., Mayor, D. J., Solan, M., and Priede, I. G.:
Hadal trenches: the ecology of the deepest places on Earth, Trends Ecol.
Evol., 25, 190–197, 2010.
Jebbar, M., Franzetti, B., Girard, E., and Oger, P.: Microbial diversity and
adaptation to high hydrostatic pressure in deep-sea hydrothermal vents
prokaryotes, Extremophiles, 19, 721–740, 2015.
Kalisch, B., Dörmann, P., and Hölzl, G.: DGDG and glycolipids in
plants and algae, Lipids Plant Algae Dev., 86, 51–83, 2016.
Kaneda, T.: Iso-and anteiso-fatty acids in bacteria: biosynthesis, function,
and taxonomic significance, Microbiol. Mol. Biol. Rev., 55, 288–302, 1991.
Kato, C., Masui, N., and Horikoshi, K.: Properties of obligately barophilic
bacteria isolated from a sample of deep-sea sediment from the Izu-Bonin
trench, Oceanogr. Lit. Rev., 1, 53–54, 1997.
Kato, M., Adachi, K., Hajiro-Nakanishi, K., Ishigaki, E., Sano, H., and
Miyachi, S.: betaine lipid from Pavolova lutheri, Phytochemistry, 37, 279–280, https://doi.org/10.1016/0031-9422(94)85041-0, 1994.
Kioka, A., Schwestermann, T., Moernaut, J., Ikehara, K., Kanamatsu, T.,
Eglinton, T. I., and Strasser, M.: Event stratigraphy in a hadal oceanic
trench: The Japan trench as sedimentary archive recording recurrent giant
subduction zone earthquakes and their role in organic carbon export to the
deep sea, Front. Earth Sci., 7, 319, https://doi.org/10.3389/feart.2019.00319, 2019.
Koblížek, M., Falkowski, P. G., and Kolber, Z. S.: Diversity and
distribution of photosynthetic bacteria in the Black Sea, Deep-Sea Res. Pt.
II, 53, 1934–1944, 2006.
Koga, Y. and Morii, H.: Biosynthesis of ether-type polar lipids in archaea
and evolutionary considerations, Microbiol. Mol. Biol. Rev., 71, 97–120,
2007.
Komatsu, H. and Chong, P. L.-G.: Low permeability of liposomal membranes
composed of bipolar tetraether lipids from thermoacidophilic archaebacterium
Sulfolobus acidocaldarius, Biochemistry, 37, 107–115, 1998.
Lam, P., Jensen, M. M., Lavik, G., McGinnis, D. F., Müller, B.,
Schubert, C. J., Amann, R., Thamdrup, B., and Kuypers, M. M.: Linking
crenarchaeal and bacterial nitrification to anammox in the Black Sea, P.
Natl. Acad. Sci. USA, 104, 7104–7109, 2007.
Lechevalier, H.: Chemotaxonomic use of lipids-an overview, Microb. Lipids,
1, 869–902, 1988.
Leduc, D., Rowden, A. A., Glud, R. N., Wenzhöfer, F., Kitazato, H., and
Clark, M. R.: Comparison between infaunal communities of the deep floor and
edge of the Tonga Trench: possible effects of differences in organic matter
supply, Deep-Sea Res. Pt. I, 116, 264–275, 2016.
Lipp, J. S. and Hinrichs, K.-U.: Structural diversity and fate of intact
polar lipids in marine sediments, Geochim. Cosmochim. Ac., 73, 6816–6833,
2009a.
Lipp, J. S., Morono, Y., Inagaki, F., and Hinrichs, K.-U.: Significant
contribution of Archaea to extant biomass in marine subsurface sediments,
Nature, 454, 991–994, 2008.
Liu, J., Zheng, Y., Lin, H., Wang, X., Li, M., Liu, Y., Yu, M., Zhao, M.,
Pedentchouk, N., Lea-Smith, D. J., Todd, J. D., Magill, C. R., Zhang, W.-J., Zhou, S., Song, D., Zhong, H., Xin, Y., Min, Y., Tian, J., and Zhang, X.-H.: Proliferation of
hydrocarbon-degrading microbes at the bottom of the Mariana Trench,
Microbiome, 7, 1–13, 2019.
Liu, X., Lipp, J. S., and Hinrichs, K.-U.: Distribution of intact and core
GDGTs in marine sediments, Org. Geochem., 42, 368–375, 2011.
Liu, X.-L., Lipp, J. S., Simpson, J. H., Lin, Y.-S., Summons, R. E., and
Hinrichs, K.-U.: Mono-and dihydroxyl glycerol dibiphytanyl glycerol
tetraethers in marine sediments: Identification of both core and intact
polar lipid forms, Geochim. Cosmochim. Ac., 89, 102–115, 2012.
Logemann, J., Graue, J., Köster, J., Engelen, B., Rullkötter, J., and Cypionka, H.: A laboratory experiment of intact polar lipid degradation in sandy sediments, Biogeosciences, 8, 2547–2560, https://doi.org/10.5194/bg-8-2547-2011, 2011.
López-Lara, I. M., Sohlenkamp, C., and Geiger, O.: Membrane lipids in
plant-associated bacteria: their biosyntheses and possible functions, Mol.
Plant. Microbe Interact., 16, 567–579, 2003.
Lund, E. D. and Chu, F.-L. E.: Phospholipid biosynthesis in the oyster
protozoan parasite, Perkinsus marinus, Mol. Biochem. Parasitol., 121,
245–253, 2002.
Luo, M., Gieskes, J., Chen, L., Shi, X., and Chen, D.: Provenances,
distribution, and accumulation of organic matter in the southern Mariana
Trench rim and slope: Implication for carbon cycle and burial in hadal
trenches, Mar. Geol., 386, 98–106, 2017.
Macdonald, A.: The effects of pressure on the molecular structure and
physiological functions of cell membranes, Philos. T. R. Soc. Lond. B, 304, 47–68, 1984.
Makula, R.: Phospholipid composition of methane-utilizing bacteria, J.
Bacteriol., 134, 771–777, 1978.
Mangelsdorf, K., Zink, K.-G., Birrien, J.-L., and Toffin, L.: A quantitative
assessment of pressure dependent adaptive changes in the membrane lipids of
a piezosensitive deep sub-seafloor bacterium, Org. Geochem., 36, 1459–1479,
2005.
Martin, J. H., Knauer, G. A., Karl, D. M., and Broenkow, W. W.: VERTEX:
carbon cycling in the northeast Pacific, Deep-Sea Res. Pt. I, 34, 267–285, 1987.
Matys, E., Sepúlveda, J., Pantoja, S., Lange, C., Caniupán, M.,
Lamy, F., and Summons, R. E.: Bacteriohopanepolyols along redox gradients in
the Humboldt Current System off northern Chile, Geobiology, 15, 844–857,
2017.
Mayzaud, P., Virtue, P., and Albessard, E.: Seasonal variations in the lipid
and fatty acid composition of the euphausiid Meganyctiphanes norvegica from
the Ligurian Sea, Mar. Ecol. Prog. Ser., 186, 199–210, 1999.
Mirzaei, A., Rahmati, M., and Ahmadi, M.: A new method for hierarchical
clustering combination, Intell. Data Anal., 12, 549–571, 2008.
Murata, N. and Siegenthaler, P.-A.: Lipids in photosynthesis: an overview,
Lipids Photosynth. Struct. Funct. Genet., 6, 1–20, 1998.
Nichols, D. S., Miller, M. R., Davies, N. W., Goodchild, A., Raftery, M.,
and Cavicchioli, R.: Cold adaptation in the Antarctic archaeon
Methanococcoides burtonii involves membrane lipid unsaturation, J.
Bacteriol., 186, 8508–8515, 2004.
Nunoura, T., Takaki, Y., Hirai, M., Shimamura, S., Makabe, A., Koide, O.,
Kikuchi, T., Miyazaki, J., Koba, K., Yoshida, N., Sunamura, M., and Takai, K.: Hadal
biosphere: insight into the microbial ecosystem in the deepest ocean on
Earth, P. Natl. Acad. Sci. USA, 112, E1230–E1236, 2015.
Nunoura, T., Hirai, M., Yoshida-Takashima, Y., Nishizawa, M., Kawagucci, S.,
Yokokawa, T., Miyazaki, J., Koide, O., Makita, H., Takaki, Y., Sunamura, M., and Takai, K.:
Distribution and niche separation of planktonic microbial communities in the
water columns from the surface to the hadal waters of the Japan Trench under
the Eutrophic Ocean, Front. Microbiol., 7, 1261, https://doi.org/10.3389/fmicb.2016.01261, 2016.
Nunoura, T., Nishizawa, M., Hirai, M., Shimamura, S., Harnvoravongchai P.,
Koide, O., Morono, Y., Fukui, T., Inagaki, F., Miyazaki, J., Takaki, Y., and
Takai, K.: Microbial Diversity in Sediments from the Bottom of the Challenger
Deep, the Mariana Trench, Microbes Environ., 33, 186–194, 2018.
Oksanen, J., Blanchet, F. G., Kindt, R., Legendre, P., Minchin, P., O'hara,
R., Simpson, G., Solymos, P., Stevens, M., and Wagner, H.: Community
ecology package, R Package Version, 2, 2013.
Oliver, J. D. and Colwell, R. R.: Extractable lipids of gram-negative marine
bacteria: phospholipid composition, J. Bacteriol., 114, 897–908, 1973.
Patton, S., Lee, R. F., and Benson, A. A.: The presence of unusually high
levels of lysophosphatidylethanolamine in a wax ester-synthesizing copepod
(Calanus plumchrus), Biochim. Biophys. Acta BBA-Lipids Lipid Metab., 270,
479–488, 1972.
Periasamy, N., Teichert, H., Weise, K., Vogel, R. F., and Winter, R.:
Effects of temperature and pressure on the lateral organization of model
membranes with functionally reconstituted multidrug transporter LmrA,
Biochim. Biophys. Acta BBA-Biomembr., 1788, 390–401, 2009.
Petersen, S. O., Henriksen, K., Blackburn, T. H., and King, G. M.: A
comparison of phospholipid and chloroform fumigation analyses for biomass in
soil: potentials and limitations, FEMS Microbiol. Lett., 85, 257–267, 1991.
Pitcher, A., Villanueva, L., Hopmans, E. C., Schouten, S., Reichart, G.-J., and Sinninghe Damsté, J. S.: Niche segregation of ammonia-oxidizing archaea and anammox bacteria in the Arabian Sea oxygen minimum zone, ISME J., 5, 1896–1904, https://doi.org/10.1038/ismej.2011.60, 2011.
Poff, K. E., Leu, A. O., Eppley, J. M., Karl, D. M., and DeLong, E. F.:
Microbial dynamics of elevated carbon flux in the open ocean's abyss, P.
Natl. Acad. Sci. USA, 118, 4, https://doi.org/10.1073/pnas.2018269118, 2021.
Pond, D. and Harris, R.: The lipid composition of the coccolithophore
Emiliania huxleyi and its possible ecophysiological significance, J. Mar.
Biol. Assoc. U. K., 76, 579–594, 1996.
Popendorf, K. J., Tanaka, T., Pujo-Pay, M., Lagaria, A., Courties, C., Conan, P., Oriol, L., Sofen, L. E., Moutin, T., and Van Mooy, B. A. S.: Gradients in intact polar diacylglycerolipids across the Mediterranean Sea are related to phosphate availability, Biogeosciences, 8, 3733–3745, https://doi.org/10.5194/bg-8-3733-2011, 2011a.
Popendorf, K. J., Lomas, M. W., and Van Mooy, B. A.: Microbial sources of
intact polar diacylglycerolipids in the Western North Atlantic Ocean, Org.
Geochem., 42, 803–811, 2011b.
Ratledge, C. and Wilkinson, S. G.: Microbial lipids, Academic press, https://doi.org/10.1002/abio.370110506, 1988.
Rex, M. A., Etter, R. J., Morris, J. S., Crouse, J., McClain, C. R.,
Johnson, N. A., Stuart, C. T., Deming, J. W., Thies, R., and Avery, R.:
Global bathymetric patterns of standing stock and body size in the deep-sea
benthos, Mar. Ecol. Prog. Ser., 317, 1–8, 2006.
Řezanka, T. and Sigler, K.: Odd-numbered very-long-chain fatty acids
from the microbial, animal and plant kingdoms, Prog. Lipid Res., 48,
206–238, 2009.
Řezanka, T., Viden, I., Go, J., Dor, I., and Dembitsky, V.: Polar lipids
and fatty acids of three wild cyanobacterial strains of the genus
Chroococcidiopsis, Folia Microbiol., 48, 781–786, 2003.
Rossel, P. E., Elvert, M., Ramette, A., Boetius, A., and Hinrichs, K.-U.:
Factors controlling the distribution of anaerobic methanotrophic communities
in marine environments: evidence from intact polar membrane lipids, Geochim.
Cosmochim. Ac., 75, 164–184, 2011.
Rütters, H., Sass, H., Cypionka, H., and Rullkötter, J.:
Monoalkylether phospholipids in the sulfate-reducing bacteria Desulfosarcina
variabilis and Desulforhabdus amnigenus, Arch. Microbiol., 176, 435–442,
2001.
Sabbatini, A., Morigi, C., Negri, A., and Gooday, A. J.: Soft-shelled
benthic foraminifera from a hadal site (7800 m water depth) in the Atacama
Trench (SE Pacific): preliminary observations, J. Micropalaeontol., 21,
131–135, 2002.
Sakurai, I., Shen, J.-R., Leng, J., Ohashi, S., Kobayashi, M., and Wada, H.:
Lipids in oxygen-evolving photosystem II complexes of cyanobacteria and
higher plants, J. Biochem., 140, 201–209, 2006.
Sato, N.: Betaine lipids, Bot. Mag. Shokubutsu-Gaku-Zasshi, 105, 185–197,
1992.
Sato, N., Hagio, M., Wada, H., and Tsuzuki, M.: Requirement of
phosphatidylglycerol for photosynthetic function in thylakoid membranes,
P. Natl. Acad. Sci. USA, 97, 10655–10660, 2000.
Schauberger, C., Middelboe, M., Larsen, M., Peoples, L. M., Bartlett, D. H.,
Kirpekar, F., Rowden, A. A., Wenzhöfer, F., Thamdrup, B., and Glud, R.
N.: Spatial variability of prokaryotic and viral abundances in the Kermadec
and Atacama Trench regions, Limnol. Oceanogr., 66, 2095–2109, 2021.
Schneider, W., Fuenzalida, R., Garcés-Vargas, J., Bravo, L., and Lange,
C.: Extensión vertical y horizontal de la zona de mínima
oxígeno en el Pacífico Sur Oriental, Gayana Concepc., 70, 79–82,
2006.
Schouten, S., Middelburg, J. J., Hopmans, E. C., and Damsté, J. S. S.:
Fossilization and degradation of intact polar lipids in deep subsurface
sediments: a theoretical approach, Geochim. Cosmochim. Ac., 74, 3806–3814,
2010.
Schubotz, F., Wakeham, S. G., Lipp, J. S., Fredricks, H. F., and Hinrichs,
K.-U.: Detection of microbial biomass by intact polar membrane lipid
analysis in the water column and surface sediments of the Black Sea,
Environ. Microbiol., 11, 2720–2734, 2009.
Schubotz, F., Meyer-Dombard, D., Bradley, A. S., Fredricks, H. F., Hinrichs,
K.-U., Shock, E., and Summons, R. E.: Spatial and temporal variability of
biomarkers and microbial diversity reveal metabolic and community
flexibility in Streamer Biofilm Communities in the Lower Geyser Basin,
Yellowstone National Park, Geobiology, 11, 549–569, 2013.
Schubotz, F., Xie, S., Lipp, J. S., Hinrichs, K.-U., and Wakeham, S. G.: Intact polar lipids in the water column of the eastern tropical North Pacific: abundance and structural variety of non-phosphorus lipids, Biogeosciences, 15, 6481–6501, https://doi.org/10.5194/bg-15-6481-2018, 2018.
Schwestermann, T., Eglinton, T., Haghipour, N., McNichol, A., Ikehara, K.,
and Strasser, M.: Event-dominated transport, provenance, and burial of
organic carbon in the Japan Trench, Earth Planet. Sci. Lett., 563, 116870, https://doi.org/10.1016/j.epsl.2021.116870,
2021.
Sebastián, M., Smith, A. F., González, J. M., Fredricks, H. F., Van
Mooy, B., Koblížek, M., Brandsma, J., Koster, G., Mestre, M.,
Mostajir, B., Pitta, P., Postle, A. D., Sánchez, P., Gasol, J. M., Scanlan, D. J., and Chen, Y.: Lipid remodelling is a widespread strategy in
marine heterotrophic bacteria upon phosphorus deficiency, ISME J., 10,
968–978, 2016.
Shaw, N.: Lipid composition as a guide to the classification of bacteria,
Adv. Appl. Microbiol., 17, 63–108, 1974.
Siegenthaler, P.-A.: Molecular organization of acyl lipids in photosynthetic
membranes of higher plants, in: Lipids in photosynthesis: structure,
function and genetics, Springer, 119–144, https://doi.org/10.1007/0-306-48087-5_7, 1998.
Siliakus, M. F., van der Oost, J., and Kengen, S. W.: Adaptations of
archaeal and bacterial membranes to variations in temperature, pH and
pressure, Extremophiles, 21, 651–670, 2017.
Smith, C.: Chemosynthesis in the deep-sea: life without the sun, Biogeosciences Discuss., 9, 17037–17052, https://doi.org/10.5194/bgd-9-17037-2012, 2012.
Sohlenkamp, C., López-Lara, I. M., and Geiger, O.: Biosynthesis of
phosphatidylcholine in bacteria, Prog. Lipid Res., 42, 115–162, 2003.
Somero, G. N.: Adaptations to high hydrostatic pressure, Annu. Rev.
Physiol., 54, 557–577, 1992.
Stockton, W. L. and DeLaca, T. E.: Food falls in the deep sea: occurrence,
quality, and significance, Deep-Sea Res. Pt. I, 29,
157–169, 1982.
Sturt, H. F., Summons, R. E., Smith, K., Elvert, M., and Hinrichs, K.-U.:
Intact polar membrane lipids in prokaryotes and sediments deciphered by
high-performance liquid chromatography/electrospray ionization multistage
mass spectrometry – new biomarkers for biogeochemistry and microbial
ecology, Rapid Commun. Mass Spectrom., 18, 617–628, 2004.
Suzuki, R. and Shimodaira, H.: Pvclust: an R package for assessing the
uncertainty in hierarchical clustering, Bioinformatics, 22, 1540–1542,
2006.
Ta, K., Peng, X., Xu, H., Du, M., Chen, S., Li, J., and Zhang, C.:
Distributions and sources of glycerol dialkyl glycerol tetraethers in
sediment cores from the Mariana subduction zone, J. Geophys. Res.-Biogeo., 124, 857–869, 2019.
Tamburini, C., Boutrif, M., Garel, M., Colwell, R. R., and Deming, J. W.:
Prokaryotic responses to hydrostatic pressure in the ocean – a review,
Environ. Microbiol., 15, 1262–1274, 2013.
Tarn, J., Peoples, L. M., Hardy, K., Cameron, J., and Bartlett, D. H.:
Identification of free-living and particle-associated microbial communities
present in hadal regions of the Mariana Trench, Front. Microbiol., 7, 665, https://doi.org/10.3389/fmicb.2016.00665,
2016.
Thompson Jr., G. A.: Lipids and membrane function in green algae, Biochim.
Biophys. Acta BBA-Lipids Lipid Metab., 1302, 17–45, 1996.
Turnewitsch, R., Falahat, S., Stehlikova, J., Oguri, K., Glud, R. N.,
Middelboe, M., Kitazato, H., Wenzhöfer, F., Ando, K., Fujio, S., and
Yanagimoto, D.: Recent sediment dynamics in hadal trenches: evidence for the
influence of higher-frequency (tidal, near-inertial) fluid dynamics, Deep-Sea Res. Pt. I, 90, 125–138, 2014.
Van Mooy, B. A. and Fredricks, H. F.: Bacterial and eukaryotic intact polar
lipids in the eastern subtropical South Pacific: water-column distribution,
planktonic sources, and fatty acid composition, Geochim. Cosmochim. Ac.,
74, 6499–6516, 2010.
Van Mooy, B. A., Rocap, G., Fredricks, H. F., Evans, C. T., and Devol, A.
H.: Sulfolipids dramatically decrease phosphorus demand by picocyanobacteria
in oligotrophic marine environments, P. Natl. Acad. Sci. USA, 103,
8607–8612, 2006.
Van Mooy, B. A., Fredricks, H. F., Pedler, B. E., Dyhrman, S. T., Karl, D.
M., Koblížek, M., Lomas, M. W., Mincer, T. J., Moore, L. R.,
Moutin, T., Rappé, M. S., and Webb, E. A.: Phytoplankton in the ocean use non-phosphorus lipids
in response to phosphorus scarcity, Nature, 458, 69–72, 2009.
Vardi, A., Van Mooy, B. A., Fredricks, H. F., Popendorf, K. J., Ossolinski,
J. E., Haramaty, L., and Bidle, K. D.: Viral glycosphingolipids induce lytic
infection and cell death in marine phytoplankton, Science, 326, 861–865,
2009.
Vargas, C. A., Cantarero, S. I., Sepúlveda, J., Galán, A., De
Pol-Holz, R., Walker, B., Schneider, W., Farías, L., D'Ottone, M. C.,
Walker, J., Xu, X., and Salisbury, J.: A source of isotopically light organic carbon in a
low-pH anoxic marine zone, Nat. Commun., 12, 1–11, 2021.
Volkman, J., Jeffrey, S., Nichols, P., Rogers, G., and Garland, C.: Fatty
acid and lipid composition of 10 species of microalgae used in mariculture,
J. Exp. Mar. Biol. Ecol., 128, 219–240, 1989.
Wada, H. and Murata, N.: Membrane lipids in cyanobacteria, in: Lipids in
photosynthesis: structure, function and genetics, Springer, 65–81, https://doi.org/10.1007/0-306-48087-5_4, 1998.
Wada, H. and Murata, N.: The essential role of phosphatidylglycerol in
photosynthesis, Photosynth. Res., 92, 205–215, 2007.
Wakeham, S. G., Lee, C., Farrington, J. W., and Gagosian, R. B.:
Biogeochemistry of particulate organic matter in the oceans: results from
sediment trap experiments, Deep-Sea Res. Pt. I, 31,
509–528, 1984.
Wakeham, S. G., Turich, C., Schubotz, F., Podlaska, A., Li, X. N., Varela,
R., Astor, Y., Saenz, J. P., Rush, D., Damste, J. S. S., Summons, R. E., Scranton, M. I. Taylor, G. T., and Hinrichs, K. -U.:
Biomarkers, chemistry and microbiology show chemoautotrophy in a multilayer
chemocline in the Cariaco Basin, Deep-Sea Res. Pt. I, 63,
133–156, 2012.
Warnes, G., Bolker, B., Bonebakker, L., Gentleman, R., Liaw, W., Lumley, T.,
Maechler, M., Magnusson, A., Moeller, S., Schwartz, M., Venables, B., and Galili, T.: gplots: various R programming tools for plotting data, R package
version 2.16.0.2015, https://github.com/talgalili/gplots (last access: 3 March 2022), 2015.
Warton, D. I., Wright, S. T., and Wang, Y.: Distance-based multivariate
analyses confound location and dispersion effects, Methods Ecol. Evol., 3,
89–101, 2012.
Weijers, J. W., Schouten, S., van den Donker, J. C., Hopmans, E. C., and
Damsté, J. S. S.: Environmental controls on bacterial tetraether
membrane lipid distribution in soils, Geochim. Cosmochim. Ac., 71,
703–713, 2007.
Wenzhöfer, F.: The Expedition SO261 of the Research Vessel SONNE to the
Atacama Trench in the Pacific Ocean in 2018, Rep. Polar Mar. Res., 729, 1–111,
2019.
Wenzhöfer, F., Oguri, K., Middelboe, M., Turnewitsch, R., Toyofuku, T.,
Kitazato, H., and Glud, R. N.: Benthic carbon mineralization in hadal
trenches: Assessment by in situ O2 microprofile measurements, Deep-Sea Res.
Pt. I, 116, 276–286, 2016.
Wenzhöfer, F.: The Expedition SO261 of the Research Vessel SONNE to the Atacama Trench in the Pacific Ocean in 2018, Rep. Polar Mar. Res., 729, 1–111, 2019.
Westrich, J. T. and Berner, R. A.: The role of sedimentary organic matter in
bacterial sulphate reduction – the G model tested, Limnol. Oceanogr., 29,
236–249, 1984.
White, D., Bobbie, R., King, J., Nickels, J., and Amoe, P.: Lipid analysis
of sediments for microbial biomass and community structure, in: Methodology
for biomass determinations and microbial activities in sediments, ASTM
International, 673, 87–103, 1979.
Winter, R.: Effect of lipid chain length, temperature, pressure and
composition on the lateral organisation and phase behavior of lipid
bilayer/gramicidin mixtures, Biophys. J., 1, 153A–153A, 2002.
Winter, R. and Jeworrek, C.: Effect of pressure on membranes, Soft Matter,
5, 3157–3173, 2009.
Wörmer, L., Lipp, J. S., Schröder, J. M., and Hinrichs, K.-U.:
Application of two new LC–ESI–MS methods for improved detection of intact
polar lipids (IPLs) in environmental samples, Org. Geochem., 59, 10–21,
2013.
Xu, Y., Ge, H., and Fang, J.: Biogeochemistry of hadal trenches: Recent
developments and future perspectives, Deep-Sea Res. Pt. II, 155, 19–26, https://doi.org/10.1016/j.dsr2.2018.10.006, 2018.
Xu, Y., Wu, W., Xiao, W., Ge, H., Wei, Y., Yin, X., Yao, H., Lipp, S. J., Pan, B., and Hinrichs, K. U.: Intact ether lipids in trench sediments related to archaeal community and environmental conditions in the deepest ocean, J. Geophys. Res.-Biogeo., 125, e2019JG005431, https://doi.org/10.1029/2019JG005431, 2020a.
Xu, Y., Jia, Z., Xiao, W., Fang, J., Wang, Y., Luo, M., Wenzhöfer, F.,
Rowden, A. A., and Glud, R. N.: Glycerol dialkyl glycerol tetraethers in
surface sediments from three Pacific trenches: Distribution, source and
environmental implications, Org. Geochem., 147, 104079, https://doi.org/10.1016/j.orggeochem.2020.104079, 2020b.
Xu, Y., Li, X., Luo, M., Xiao, W., Fang, J., Rashid, H., Peng, Y., Li, W.,
Wenzhöfer, F., Rowden, A. A., and Glud, R. N.: Distribution, Source, and
Burial of Sedimentary Organic Carbon in Kermadec and Atacama Trenches, J.
Geophys. Res.-Biogeo., 126, e2020JG006189, https://doi.org/10.1029/2020JG006189, 2021.
Yano, Y., Nakayama, A., Ishihara, K., and Saito, H.: Adaptive changes in
membrane lipids of barophilic bacteria in response to changes in growth
pressure, Appl. Environ. Microbiol., 64, 479–485, 1998.
Zheng, Y., Wang, J., Zhou, S., Zhang, Y., Liu, J., Xue, C. X., Williams, B. T., Zhao, X., Zhao, L., Zhu, X-Y., Sun, C., Zhang, H-H., Xiao, T., Yang, G-P., Todd, J. D., and Zhang, X. H.: Bacteria are important dimethylsulfoniopropionate producers in marine aphotic and high-pressure environments, Nat. Commun., 11, 1–12, https://doi.org/10.1038/s41467-020-18434-4, 2020.
Zhong, H., Lehtovirta-Morley, L., Liu, J., Zheng, Y., Lin, H., Song, D.,
Todd, J. D., Tian, J., and Zhang, X.-H.: Novel insights into the
Thaumarchaeota in the deepest oceans: their metabolism and potential
adaptation mechanisms, Microbiome, 8, 1–16, 2020.
Zhukova, N. V.: Variation in microbial biomass and community structure in
sediments of Peter the Great Bay (Sea of Japan/East Sea), as estimated from
fatty acid biomarkers, Ocean Sci. J., 40, 34–42, 2005.
Short summary
In this study, we investigate the chemical diversity and abundance of microbial lipids as markers of organic matter sources in the deepest points of the Atacama Trench sediments and compare them to similar lipid stocks in shallower surface sediments and in the overlying water column. We evaluate possible organic matter provenance and some potential chemical adaptations of the in situ microbial community to the extreme conditions of high hydrostatic pressure in hadal realm.
In this study, we investigate the chemical diversity and abundance of microbial lipids as...
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