Articles | Volume 20, issue 24
https://doi.org/10.5194/bg-20-5109-2023
© Author(s) 2023. 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-20-5109-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
20 Dec 2023
Research article |
| 20 Dec 2023
| 20 Dec 2023
Sinking fate and carbon export of zooplankton fecal pellets: insights from time-series sediment trap observations in the northern South China Sea
Hanxiao Wang
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
Jiaying Li
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
Baozhi Lin
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
Yulong Zhao
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
Xiaodong Zhang
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
Junyuan Cao
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
Jingwen Zhang
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
Hongzhe Song
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
Wenzhuo Wang
State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China
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Ruitong Wu, Zhifei Liu, Jiaying Li, Baozhi Lin, Yulong Zhao, Junyuan Cao, and Xiaodong Zhang
EGUsphere, https://doi.org/10.5194/egusphere-2025-2864, https://doi.org/10.5194/egusphere-2025-2864, 2025
This preprint is open for discussion and under review for Biogeosciences (BG).
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Zooplankton fecal pellets are key contributors to the marine biological pump. This study presents time-series sediment trap observations of fecal pellet export at 500 m water depth in the southern South China Sea. The results indicate that the mesopelagic fecal pellet carbon flux is primarily regulated by upper-ocean dynamic processes, including winter mixing, tropical cyclones, and mesoscale eddies, providing new insights into the dynamics of biological pump in oligotrophic ocean systems.
Yuan Gao, Youfeng Gao, Daniel E. Ibarra, Xiaojing Du, Tian Dong, Zhifei Liu, and Chengshan Wang
Clim. Past Discuss., https://doi.org/10.5194/cp-2020-36, https://doi.org/10.5194/cp-2020-36, 2020
Revised manuscript not accepted
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We present a high-resolution clay mineralogical record in continental Songliao Basin of NE China from the latest Cretaceous through the earliest Paleogene. Three clay mineralogical proxies are used for paleoclimatic reconstructions and are correlated with marine records.
Fluctuations in terrestrial climate occurred during the latest Cretaceous and across the K-Pg boundary when warming (cooling) caused increasing (decreasing) precipitation and intensified (weakened) chemical weathering.
Qianqian Liu, Selvaraj Kandasamy, Baozhi Lin, Huawei Wang, and Chen-Tung Arthur Chen
Biogeosciences, 15, 2091–2109, https://doi.org/10.5194/bg-15-2091-2018, https://doi.org/10.5194/bg-15-2091-2018, 2018
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Understanding the global carbon cycling in the marginal seas is crucial to realize the climate–carbon link. Here we characterized the source of suspended particulate matter along the deep chlorophyll maximum layers and found that organic matter in these layers was largely derived from the primary production. Also this layer is insignificantly influenced by the land-derived organic matter. Our results may have a direct implication on the application of isotopic mixing models in marine sediments.
Quentin Dubois-Dauphin, Paolo Montagna, Giuseppe Siani, Eric Douville, Claudia Wienberg, Dierk Hebbeln, Zhifei Liu, Nejib Kallel, Arnaud Dapoigny, Marie Revel, Edwige Pons-Branchu, Marco Taviani, and Christophe Colin
Clim. Past, 13, 17–37, https://doi.org/10.5194/cp-13-17-2017, https://doi.org/10.5194/cp-13-17-2017, 2017
Related subject area
Biogeochemistry: Organic Biogeochemistry
Sea-ice-associated algae and zooplankton fecal pellets fuel organic particle export in the seasonally ice-covered northwestern Labrador Sea
Sedimentary organic carbon dynamics in a glaciated Arctic fjord: tracing contributions of terrestrial and marine sources in the context of Atlantification over recent centuries
Technical note: Measurements of fluorescent dissolved organic matter (FDOM) in seawater (Filter blanks, pore sizes, and storage)
Distribution of alkylamines in surface waters around the Antarctic Peninsula and Weddell Sea
Methanogenesis by CO2 reduction dominates lake sediments with different organic matter compositions
Contrasting seasonal patterns in particle aggregation and dissolved organic matter transformation in a sub-Arctic fjord
Methods to characterize type, relevance, and interactions of organic matter and microorganisms in fluids along the flow path of a geothermal facility
Microbial strong organic-ligand production is tightly coupled to iron in hydrothermal plumes
Ocean liming effects on dissolved organic matter dynamics
Results from a multi-laboratory ocean metaproteomic intercomparison: effects of LC-MS acquisition and data analysis procedures
Controls on the composition of hydroxylated isoprenoidal glycerol dialkyl glycerol tetraethers (isoGDGTs) in cultivated ammonia-oxidizing Thaumarchaeota
Reviews and syntheses: Opportunities for robust use of peak intensities from high-resolution mass spectrometry in organic matter studies
Hydrothermal inputs drive dynamic shifts in microbial communities in Lake Magadi, Kenya Rift Valley
Elemental stoichiometry of particulate organic matter across the Atlantic Ocean
Lipid remodeling in phytoplankton exposed to multi-environmental drivers in a mesocosm experiment
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
Latitudinal distribution of biomarkers across the western Arctic Ocean and the Bering Sea: an approach to assess sympagic and pelagic algal production
Low cobalt inventories in the Amundsen and Ross seas driven by high demand for labile cobalt uptake among native phytoplankton communities
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
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
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
Shao-Min Chen, Thibaud Dezutter, David Cote, Catherine Lalande, Evan Edinger, and Owen A. Sherwood
Biogeosciences, 22, 2517–2540, https://doi.org/10.5194/bg-22-2517-2025, https://doi.org/10.5194/bg-22-2517-2025, 2025
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The origins and composition of sinking organic matter are still understudied for the oceans, especially in ice-covered areas. We use amino acid stable isotopes combined with particle flux and plankton taxonomy to investigate the sources and composition of exported organic matter from a sediment-trap-derived time series of sinking particles in the northwestern Labrador Sea. We found that sea-ice algae and fecal pellets may be important contributors to the sinking fluxes of carbon and nitrogen.
Dahae Kim, Jung-Hyun Kim, Youngkyu Ahn, Matthias Forwick, and Seung-Il Nam
EGUsphere, https://doi.org/10.5194/egusphere-2025-957, https://doi.org/10.5194/egusphere-2025-957, 2025
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The Arctic is warming rapidly, altering carbon storage in Svalbard’s Kongsfjorden. Our study analyzed sediment cores to track organic carbon shifts over time. We found that increasing Atlantic Water inflow enhanced marine carbon while reducing land-derived inputs. These findings suggest that Atlantification is reshaping carbon sequestration in Arctic fjords, with broader implications for the Arctic carbon cycle.
Junhyeong Seo, Heejun Han, Intae Kim, and Guebuem Kim
EGUsphere, https://doi.org/10.5194/egusphere-2025-501, https://doi.org/10.5194/egusphere-2025-501, 2025
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This study examines methodological uncertainties in FDOM (fluorescent dissolved organic matter) measurements due to filter blanks, pore sizes, and storage conditions. Results show that pre-cleaning filters and optimizing storage improve measurement reliability. These finding minimize procedural errors and provide clear guidelines for FDOM analysis, emphasizing the need for method standardization in marine biogeochemical research.
Arianna Rocchi, Mark F. Fitzsimons, Preston Akenga, Ana Sotomayor, Elisabet L. Sà, Queralt Güell-Bujons, Magda Vila, Yaiza M. Castillo, Manuel Dall’Osto, Dolors Vaqué, Charel Wohl, Rafel Simó, and Elisa Berdalet
EGUsphere, https://doi.org/10.5194/egusphere-2025-407, https://doi.org/10.5194/egusphere-2025-407, 2025
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During the Polar Change expedition, volatile alkylamines, important players in nitrogen cycling and cloud formation, were measured in Antarctic waters using a high-sensitivity method. Trimethylamine was the dominant alkylamine in marine particles, associated with nanophytoplankton. Dissolved dimethylamine likely originated from trimethylamine degradation, while diethylamine sources remain unclear. These findings confirm the biological origin of alkylamines in polar marine microbial food webs.
Guangyi Su, Julie Tolu, Clemens Glombitza, Jakob Zopfi, Moritz F. Lehmann, Mark A. Lever, and Carsten J. Schubert
EGUsphere, https://doi.org/10.5194/egusphere-2025-437, https://doi.org/10.5194/egusphere-2025-437, 2025
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In Lake Geneva, we studied how different types of organic matter affect methane production. Despite varying sources—like algae and land-based materials, both deep and delta areas are significant methane sources and methane was mainly produced through CO2 reduction. Surprisingly, the origin of organic matter didn’t strongly influence methane production rates or pathways. Our findings highlight the need to better understand microbial processes to predict methane emissions from lakes.
Maria G. Digernes, Yasemin V. Bodur, Martí Amargant-Arumí, Oliver Müller, Jeffrey A. Hawkes, Stephen G. Kohler, Ulrike Dietrich, Marit Reigstad, and Maria L. Paulsen
Biogeosciences, 22, 601–623, https://doi.org/10.5194/bg-22-601-2025, https://doi.org/10.5194/bg-22-601-2025, 2025
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Dissolved (DOM) and particulate organic matter (POM) are in constant exchange but are usually studied as distinct entities. We investigated the dynamics between POM and DOM in a sub-Arctic fjord across different seasons by conducting bi-monthly aggregation–dissolution experiments. During the productive period, POM concentrations increased in the experiment, and DOM molecules became more recalcitrant. During the winter period, POM concentrations decreased, and DOM molecules became more labile.
Alessio Leins, Danaé Bregnard, Andrea Vieth-Hillebrand, Stefanie Poetz, Florian Eichinger, Guillaume Cailleau, Pilar Junier, and Simona Regenspurg
Biogeosciences, 21, 5457–5479, https://doi.org/10.5194/bg-21-5457-2024, https://doi.org/10.5194/bg-21-5457-2024, 2024
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Organic matter and microbial fluid analysis are rarely considered in the geothermal industry and research. However, they can have a significant impact on the efficiency of geothermal energy production. We found a high diversity of organic compound compositions in our samples and were able to differentiate them with respect to different sources (e.g. artificial and biogenic). Furthermore, the microbial diversity undergoes significant changes within the flow path of a geothermal power plant.
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
Biogeosciences, 21, 5233–5246, https://doi.org/10.5194/bg-21-5233-2024, https://doi.org/10.5194/bg-21-5233-2024, 2024
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Hydrothermally derived iron can be transported kilometers away from deep-sea vents, representing a significant flux of vital micronutrients to the ocean. However, the mechanisms that support the stabilization of dissolved iron remain elusive. Using electrochemical, spectrometry, and genomic methods, we demonstrated that strong ligands exert an important control on iron in plumes, and high-affinity iron-binding siderophores were identified in several hydrothermal plume samples for the first time.
Chiara Santinelli, Silvia Valsecchi, Simona Retelletti Brogi, Giancarlo Bachi, Giovanni Checcucci, Mirco Guerrazzi, Elisa Camatti, Stefano Caserini, Arianna Azzellino, and Daniela Basso
Biogeosciences, 21, 5131–5141, https://doi.org/10.5194/bg-21-5131-2024, https://doi.org/10.5194/bg-21-5131-2024, 2024
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Ocean liming is a technique proposed to mitigate ocean acidification. Every action we take has an impact on the environment and the effects on the invisible world are often overlooked. With this study, we show that lime addition impacts the dynamics of dissolved organic matter, one of the largest reservoirs of carbon on Earth, representing the main source of energy for marine microbes. Further studies to assess the impacts on marine ecosystems are therefore crucial before taking any action.
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
Biogeosciences, 21, 4889–4908, https://doi.org/10.5194/bg-21-4889-2024, https://doi.org/10.5194/bg-21-4889-2024, 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 their taxonomic origins.
Devika Varma, Laura Villanueva, Nicole J. Bale, Pierre Offre, Gert-Jan Reichart, and Stefan Schouten
Biogeosciences, 21, 4875–4888, https://doi.org/10.5194/bg-21-4875-2024, https://doi.org/10.5194/bg-21-4875-2024, 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.
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.
Evan R. Collins, Troy M. Ferland, Isla S. Castañeda, R. Bernhart Owen, Tim K. Lowenstein, Andrew S. Cohen, Robin W. Renaut, Molly D. O'Beirne, and Josef P. Werne
EGUsphere, https://doi.org/10.5194/egusphere-2024-3006, https://doi.org/10.5194/egusphere-2024-3006, 2024
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Archaeal molecular fossils (tetraethers) have been used around the globe to track changes in climate. Little is known about archaeal response to environmental change in soda lakes, especially lakes influenced by hydrothermal inputs. For the first time in Lake Magadi, we show tetraethers tracking abrupt changes in methane and non-methane producers due to hydrothermal inputs to the lake. This study provides insight into the role of hydrothermal water sources and methane production in soda lakes.
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.
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.
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.
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.
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.
Edgart Flores, Sebastian I. Cantarero, Paula Ruiz-Fernández, Nadia Dildar, Matthias Zabel, Osvaldo Ulloa, and Julio Sepúlveda
Biogeosciences, 19, 1395–1420, https://doi.org/10.5194/bg-19-1395-2022, https://doi.org/10.5194/bg-19-1395-2022, 2022
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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.
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.
Cited articles
Beaumont, K. L., Nash, G. V., and Davidson, A. T.: Ultrastructure, morphology and flux of microzooplankton faecal pellets in an east Antarctic fjord, Mar. Ecol. Prog. Ser., 245, 133–148, https://doi.org/10.3354/meps245133, 2002.
Belcher, A., Manno, C., Ward, P., Henson, S. A., Sanders, R., and Tarling, G. A.: Copepod faecal pellet transfer through the meso- and bathypelagic layers in the Southern Ocean in spring, Biogeosciences, 14, 1511–1525, https://doi.org/10.5194/bg-14-1511-2017, 2017.
Blattmann, T. M., Zhang, Y., Zhao, Y., Wen, K., Lin, S., Li, J., Wacker, L., Haghipour, N., Plotze, M., Liu, Z., and Eglinton, T. I.: Contrasting Fates of Petrogenic and Biospheric Carbon in the South China Sea, Geophys. Res. Lett., 45, 9077–9086, https://doi.org/10.1029/2018gl079222, 2018.
Blattmann, T. M., Liu, Z., Zhang, Y., Zhao, Y., Haghipour, N., Montlucon, D. B., Plotze, M., and Eglinton, T. I.: Mineralogical control on the fate of continentally derived organic matter in the ocean, Science, 366, 742–745, https://doi.org/10.1126/science.aax5345, 2019.
Boyd, P. W., Claustre, H., Levy, M., Siegel, D. A., and Weber, T.: Multi-faceted particle pumps drive carbon sequestration in the ocean, Nature, 568, 327–335, https://doi.org/10.1038/s41586-019-1098-2, 2019.
Cao, Z., Yang, W., Zhao, Y., Guo, X., Yin, Z., Du, C., Zhao, H., and Dai, M.: Diagnosis of CO2 dynamics and fluxes in global coastal oceans, Natl. Sci. Rev., 7, 786–797, https://doi.org/10.1093/nsr/nwz105, 2020.
Carroll, M. L., Miquel, J. C., and Fowler, S. W.: Seasonal patterns and depth-specific trends of zooplankton fecal pellet fluxes in the Northwestern Mediterranean Sea, Deep-Sea Res. I, 45, 1303–1318, https://doi.org/10.1016/S0967-0637(98)00013-2, 1998.
Caruso, M. J., Gawarkiewicz, G. G., and Beardsley, R. C.: Interannual variability of the Kuroshio intrusion in the South China Sea, J. Oceanogr., 62, 559–575, https://doi.org/10.1007/s10872-006-0076-0, 2006.
Chen, B., Liu, H., Landry, M. R., Dai, M., Huang, B., and Sun, J.: Close coupling between phytoplankton growth and microzooplankton grazing in the western South China Sea, Limnol. Oceanogr., 54, 1084–1097, https://doi.org/10.4319/lo.2009.54.4.1084, 2009.
Chen, C., Mao, Z., Han, G., Zhu, Q., Gong, F., and Wang, T.: Latitudinal and interannual variations of the spring phytoplankton bloom peak in the East Asian marginal seas, Acta. Oceanol. Sin., 35, 81–88, https://doi.org/10.1007/s13131-016-0867-0, 2016.
Chen, J., Zheng, L., Wiesner, M. G., Chen, R., Zheng, Y., and Wong, H.: Estimations of primary production and export production in the South China Sea based on sediment trap experiments, Chinese. Sci. Bull., 43, 583–586, https://doi.org/10.1007/Bf02883645, 1998.
Chen, Y.-L. L.: Spatial and seasonal variations of nitrate-based new production and primary production in the South China Sea, Deep-Sea Res. I, 52, 319–340, https://doi.org/10.1016/j.dsr.2004.11.001, 2005.
Chu, P. and Wang, G.: Seasonal variability of thermohaline front in the central South China Sea, J. Oceanogr., 59, 65–78, https://https://doi.org/10.1023/a:1022868407012, 2003.
Du, C., Liu, Z., Kao, S.-J., and Dai, M.: Diapycnal Fluxes of Nutrients in an Oligotrophic Oceanic Regime: The South China Sea, Geophys. Res. Lett., 44, 11510–11518, https://doi.org/10.1002/2017GL074921, 2017.
Du, F., Wang, X., Gu, Y., Yu, J., Wang, L., Ning, J., Lin, Q., Jia, X., and Yang, S.: Vertical distribution of zooplankton in the continental slope southwest of Nansha Islands, South China Sea (in Chinese), Acta. Oceanol. Sin., 36, 94–103, https://doi.org/10.3969/j.issn.0253-4193.2014.06.012, 2014.
Fowler, S. W. and Knauer, G. A.: Role of Large Particles in the Transport of Elements and Organic-Compounds through the Oceanic Water Column, Prog. Oceanogr., 16, 147–194, https://doi.org/10.1016/0079-6611(86)90032-7, 1986.
Fowler, S. W., Small, L. F., and Larosa, J.: Seasonal Particulate Carbon Flux in the Coastal Northwestern Mediterranean-Sea, and the Role of Zooplankton Fecal Matter, Oceanol. Acta., 14, 77–85, 1991.
Gao, M., Huang, B., Liu, Z., Zhao, Y., and Zhang, Y.: Observations of marine snow and fecal pellets in a sediment trap mooring in the northern South China Sea, Acta. Oceanol. Sin., 39, 141–147, https://doi.org/10.1007/s13131-020-1561-9, 2020.
Ge, R., Chen, H., Zhuang, Y., and Liu, G.: Active Carbon Flux of Mesozooplankton in South China Sea and Western Philippine Sea, Front. Mar. Sci., 8, 697743, https://doi.org/10.3389/fmars.2021.697743, 2021.
Gleiber, M. R., Steinberg, D. K., and Ducklow, H. W.: Time series of vertical flux of zooplankton fecal pellets on the continental shelf of the western Antarctic Peninsula, Mar. Ecol. Prog. Ser., 471, 23–36, https://doi.org/10.3354/meps10021, 2012.
Goldthwait, S. A. and Steinberg, D. K.: Elevated biomass of mesozooplankton and enhanced fecal pellet flux in cyclonic and mode-water eddies in the Sargasso Sea, Deep-Sea Res. Pt. II, 55, 1360–1377, https://doi.org/10.1016/j.dsr2.2008.01.003, 2008.
Gong, Y., Yang, Y., Fang, J., Cai, Y., Xu, S., and Chen, Z.: Spatial distribution of zooplankton in continental slope of northern South China Sea in summer, South China Fisheries Science, 13, 8–15, https://doi.org/10.3969/j.issn.2095-0780.2017.05.002, 2017 (in Chinese).
González, H. E. and Smetacek, V.: The possible role of the cyclopoid copepod Oithona in retarding vertical flux of zooplankton fecal material, Mar. Ecol. Prog. Ser., 113, 233–246, https://doi.org/10.3354/meps113233, 1994.
González, H. E., González, S. R., and Brummer, G. J. A.: Short-Term Short-term sedimentation pattern of zooplankton, feces and microplankton at a permanent station in the Bjornafjorden (Norway) during April–May 1992, Mar. Ecol. Prog. Ser., 105, 31–45, https://doi.org/10.3354/meps105031, 1994.
González, H. E., Ortiz, V. C., and Sobarzo, M.: The role of faecal material in the particulate organic carbon flux in the northern Humboldt Current, Chile (23∘ S), before and during the 1997–1998 El Niño, J. Plankton. Res., 22, 499–529, https://doi.org/10.1093/plankt/22.3.499, 2000.
González, H. E., Hebbeln, D., Iriarte, J. L., and Marchant, M.: Downward fluxes of faecal material and microplankton at 2300m depth in the oceanic area off Coquimbo (30∘ S), Chile, during 1993–1995, Deep-Sea Res. Pt. II, 51, 2457–2474, https://doi.org/10.1016/j.dsr2.2004.07.027, 2004.
González, H. E., Daneri, G., Iriarte, J. L., Yannicelli, B., Menschel, E., Barria, C., Pantoja, S., and Lizarraga, L.: Carbon fluxes within the epipelagic zone of the Humboldt Current System off Chile: The significance of euphausiids and diatoms as key functional groups for the biological pump, Prog. Oceanogr., 83, 217–227, 1 https://doi.org/10.1016/j.pocean.2009.07.036, 2009.
Juul-Pedersen, T., Nielsen, T. G., Michel, C., Moller, E. F., Tiselius, P., Thor, P., Olesen, M., Selander, E., and Gooding, S.: Sedimentation following the spring bloom in Disko Bay, West Greenland, with special emphasis on the role of copepods, Mar. Ecol. Prog. Ser., 314, 239–255, https://doi.org/10.3354/meps314239, 2006.
Kobari, T., Akamatsu, H., Minowa, M., Ichikawa, T., Iseki, K., Fukuda, R., and Higashi, M.: Effects of the Copepod Community Structure on Fecal Pellet Flux in Kagoshima Bay, a Deep, Semi-Enclosed Embayment, J. Oceanogr., 66, 673–684, https://doi.org/10.1007/ s10872-010-0055-3, 2010.
Kobari, T., Nakamura, R., Unno, K., Kitamura, M., Tanabe, K., Nagafuku, H., Niibo, A., Kawakami, H., Matsumoto, K., and Honda, M. C.: Seasonal variability in carbon demand and flux by mesozooplankton communities at subarctic and subtropical sites in the western North Pacific Ocean, J. Oceanogr., 72, 403–418, https://doi.org/10.1007/s10872-015-0348-7, 2016.
Köster, M., Sietmann, R., Meuche, A., and Paffenhöfer, G. A.: The ultrastructure of a doliolid and a copepod fecal pellet, J. Plankton. Res., 33, 1538–1549, https://doi.org/10.1093/plankt/fbr053, 2011.
Kumar, R. G., Strom, K. B., and Keyvani, A.: Floc properties and settling velocity of San Jacinto estuary mud under variable shear and salinity conditions, Cont. Shelf. Res., 30, 2067–2081, https://doi.org/10.1016/j.csr.2010.10.006, 2010.
Lalande, C., Nöthig, E.-M., Bauerfeind, E., Hardge, K., Beszczynska- Möller, A., and Fahl, K.: Lateral supply and downward export of particulate matter from upper waters to the seafloor in the deep eastern Fram Strait, Deep-Sea Res. Pt. I, 114, 78–89, https://doi.org/10.1016/j.dsr.2016.04.014, 2016.
Le Moigne, F. A. C.: Pathways of Organic Carbon Downward Transport by the Oceanic Biological Carbon Pump, Front. Mar. Sci., 6, 634, https://doi.org/10.3389/fmars.2019.00634, 2019.
Li, C., Jia, X., and Cai, W.: Diversity of marine zooplankton in the north of South China Sea (in Chinese), Journal of Fishery Sciences of China, 11, 139–146, 2004.
Li, H., Wiesner, M. G., Chen, J., Ling, Z., Zhang, J., and Ran, L.: Long-term variation of mesopelagic biogenic flux in the central South China Sea: Impact of monsoonal seasonality and mesoscale eddy, Deep-Sea Res. Pt. I, 126, 62–72, https://doi.org/10.1016/j.dsr.2017.05.012, 2017.
Li, J., Liu, Z., Lin, B., Zhao, Y., Cao, J., Zhang, X., Zhang, J., Ling, C., Ma, P., and Wu, J.: Zooplankton fecal pellet characteristics and contribution to the deep-sea carbon export in the southern South China Sea, J. Geophys. Res-Oceans., 127, 1–25, https://doi.org/10.1029/2022JC019412, 2022.
Li, K., Yin, J., Huang, L., Tan, Y., and Lin, Q.: A comparison of the zooplankton community in the Bay of Bengal and South China Sea during April–May, 2010, J. Ocean. U. China., 16, 1206–1212, https://doi.org/10.1007/s11802-017-3229-4, 2017.
Li, K., Ren, Y., Ke, Z., Li, G., and Tan, Y.: Vertical distributions of epipelagic and mesopelagic zooplankton in the continental slope of the northeastern South China Sea (in Chinese), Journal of Tropical Oceanography, 40, 61–73, https://doi.org/10.11978/2020061, 2021.
Liu, K.-K., Chao, S.-Y., Shaw, P.-T., Gong, G.-C., Chen, C.-C., and Tang, T.: Monsoon-forced chlorophyll distribution and primary production in the South China Sea: observations and a numerical study, Deep-Sea Res. Pt. I, 49, 1387–1412, https://doi.org/10.1016/s0967-0637(02)00035-3, 2002.
Liu, K.-K., Kao, S.-J., Hu, H.-C., Chou, W.-C., Hung, G.-W., and Tseng, C.-M.: Carbon isotopic composition of suspended and sinking particulate organic matter in the northern South China Sea—From production to deposition, Deep-Sea Res. Pt. II, 54, 1504–1527, https://doi.org/10.1016/j.dsr2.2007.05.010, 2007.
Liu, Z., Colin, C., Li, X., Zhao, Y., Tuo, S., Chen, Z., Siringan, F. P., Liu, J., Huang, C., You, C., and Huang, K.: Clay mineral distribution in surface sediments of the northeastern South China Sea and surrounding fluvial drainage basins: Source and transport, Mar. Geol., 277, 48–60, https://doi.org/10.1016/j.margeo.2010.08.010, 2010.
Liu, Z., Zhao, Y., Colin, C., Stattegger, K., Wiesner, M. G., Huh, C.-A., Zhang, Y., Li, X., Sompongchaiyakul, P., You, C., Huang, C., Liu, J., Siringan, F. P., Le, K. P., Sathiamurthy, E., Hantoro, W. S., Liu, J., Tuo, S., Zhao, S., Zhou, S., He, Z., Wang, Y., Bunsomboonsakul, S., and Li, Y.: Source-to-sink transport processes of fluvial sediments in the South China Sea, Earth-Sci. Rev., 153, 238–273, https://doi.org/10.1016/j.earscirev.2015.08.005, 2016.
Manno, C., Stowasser, G., Enderlein, P., Fielding, S., and Tarling, G. A.: The contribution of zooplankton faecal pellets to deep-carbon transport in the Scotia Sea (Southern Ocean), Biogeosciences, 12, 1955–1965, https://doi.org/10.5194/bg-12-1955-2015, 2015.
Meyers, P. A.: Organic geochemical proxies of paleoceanographic, paleolimnologic, and paleoclimatic processes, Org. Geochem. 27, 213–250, https://doi.org/10.1016/S0146-6380(97)00049-1, 1997.
Miquel, J.-C., Gasser, B., Martín, J., Marec, C., Babin, M., Fortier, L., and Forest, A.: Downward particle flux and carbon export in the Beaufort Sea, Arctic Ocean; the role of zooplankton, Biogeosciences, 12, 5103–5117, https://doi.org/10.5194/bg-12-5103-2015, 2015.
Noji, T. T., Estep, K. W., Macintyre, F., and Norrbin, F.: Image analysis of fecal material grazed upon by 3 species of copepods: Evidence for coprorhexy, coprophagy and coprochaly, J. Mar. Biol. Assoc. UK., 71, 465–480, https://doi.org/10.1017/s0025315400051717, 1991.
Paffenhöfer, G. A. and Knowles, S. C.: Ecological implications of fecal pellet size, production and consumption by copepods, J. Mater. Res., 37, 35–49, 1979.
Phillips, B., Kremer, P., and Madin, L. P.: Defecation by Salpa thompsoni and its contribution to vertical flux in the Southern Ocean, Mar. Biol., 156, 455–467, https://doi.org/10.1007/s00227-008-1099-4, 2009.
Pilskaln, C. H. and Honjo, S.: The fecal pellet fraction of biogeochemical particle fluxes to the deep sea, Global. Biogeochem. Cy., 1, 31–48, https://doi.org/10.1029/GB001i001p00031, 1987.
Qiu, Y., Laws, E. A., Wang, L., Wang, D., Liu, X., and Huang, B.: The potential contributions of phytoplankton cells and zooplankton fecal pellets to POC export fluxes during a spring bloom in the East China Sea, Cont. Shelf. Res., 167, 32–45, https://doi.org/10.1016/j.csr.2018.08.001, 2018.
Ramaswamya, V., Sarin, M. M., and Rengarajan, R.: Enhanced export of carbon by salps during the northeast monsoon period in the northern Arabian Sea, Deep-Sea Res. Pt. II, 52, 1922–1929, https://doi.org/10.1016/j.dsr2.2005.05.005, 2005.
Ren, Y., Yin, J., Tan, Y., Liu, H., Yu, L., and Li, K.: Monsoon-driven seasonal and spatial distribution of the copepod community along the northwest continental shelf of the South China Sea, J. Marine. Syst., 218, 103529, https://doi.org/10.1016/j.jmarsys.2021.103529, 2021.
Roman, M. R. and Gauzens, A. L.: Copepod grazing in the equatorial Pacific, Limnol. Oceanogr., 42, 623–634, https://doi.org/10.4319/lo.1997.42.4.0623, 1997.
Roman, M., Smith, S., Wishner, K., Zhang, X. S., and Gowing, M.: Mesozooplankton production and grazing in the Arabian Sea, Deep-Sea Res. Pt. II, 47, 1423–1450, https://doi.org/10.1016/s0967-0645(99)00149-6, 2000.
Schlitzer, R.: Ocean data view, http://odv.awi.de (last access: 26 March 2023), 2023.
Shatova, O., Koweek, D., Conte, M. H., and Weber, J. C.: Contribution of zooplankton fecal pellets to deep ocean particle flux in the Sargasso Sea assessed using quantitative image analysis, J. Plankton. Res., 34, 905–921, https://doi.org/10.1093/plankt/fbs053, 2012.
Steinberg, D. K. and Landry, M. R.: Zooplankton and the ocean carbon cycle, Ann. Rev. Mar. Sci., 9, 413–444, https://doi.org/10.1146/annurev-marine-010814-015924, 2017.
Stukel, M. R., Ohman, M. D., Benitez-Nelson, C. R., and Landry, M. R.: Contributions of mesozooplankton to vertical carbon export in a coastal upwelling system, Mar. Ecol. Prog. Ser., 491, 47–65, https://doi.org/10.3354/meps10453, 2013.
Su, J.: Overview of the South China Sea circulation and its influence on the coastal physical oceanography near the Pearl River Estuary, Cont. Shelf. Res., 24, 1745–1760, https://doi.org/10.1016/j.csr.2004.06.005, 2004.
Sun, J. and Liu, D.: Geometric models for calculating cell biovolume and surface area for phytoplankton, J. Plankton. Res., 25, 1331–1346, https://doi.org/10.1093/plankt/fbg096, 2003.
Svensen, C., Riser, C. W., Reigstad, M., and Seuthe, L.: Degradation of copepod faecal pellets in the upper layer: role of microbial community and Calanus finmarchicus, Mar. Ecol. Prog. Ser., 462, 39–49, https://doi.org/10.3354/meps09808, 2012.
Taylor, G. T.: Variability in the vertical flux of microorganisms and biogenic material in the epipelagic zone of a North Pacific central gyre station, Deep-Sea Res. Pt. I, 36, 1287–1308, https://doi.org/10.1016/0198-0149(89)90084-8, 1989.
Tseng, C.-M., Wong, G. T. F., Lin, I.-I., Wu, C.-R., and Liu, K.-K.: A unique seasonal pattern in phytoplankton biomass in low-latitude waters in the South China Sea, Geophys. Res. Lett., 32, L08608, https://doi.org/10.1029/2004gl022111, 2005.
Turner, J. T.: Zooplankton fecal pellets, marine snow and sinking phytoplankton blooms, Aquat. Microb. Ecol., 27, 57–102, https://doi.org/10.3354/ame027057, 2002.
Turner, J. T.: Zooplankton fecal pellets, marine snow, phytodetritus and the ocean's biological pump, Prog. Oceanogr., 130, 205–248, https://doi.org/10.1016/j.pocean.2014.08.005, 2015.
Urban-Rich, J., Hansell, D. A., and Roman, M. R.: Analysis of copepod fecal pellet carbon using a high temperature combustion method, Mar. Ecol. Prog. Ser., 171, 199–208, https://doi.org/10.3354/meps171199, 1998.
Urrère, M. A. and Knauer, G. A.: Zooplankton fecal pellet fluxes and vertical transport of particulate organic material in the pelagic environment, J. Plankton. Res., 3, 369–387, https://doi.org/10.1093/plankt/3.3.369, 1981.
Viitasalo, M., Rosenberg, M., Heiskanen, A.-S., and Koski, M.: Sedimentation of copepod fecal material in the coastal northern Baltic Sea: Where did all the pellets go?, Limnol. Oceanogr., 44, 1388–1399, https://doi.org/10.4319/lo.1999.44.6.1388, 1999.
Vizzini, S., Savona, B., Caruso, M. F., Savona, A., and Mazzola, A.: Analysis of stable carbon and nitrogen isotopes as a tool for assessing the environmental impact of aquaculture: a case study from the western Mediterranean, Aquacult. Int., 13, 157–165, https://doi.org/10.1007/s10499-004-9023-5, 2005.
Wang, H., Liu, Z., Li, J., Lin, B., and Zhao, Y.: Flux data of total mass, particulate organic carbon, and zooplankton fecal pellet of time-series sediment trap samples at the mooring TJ-A1B in the northern South China Sea, Pangaea [data set], https://doi.org/10.1594/PANGAEA.962713, 2023.
Wang, P. and Li, Q. (Eds.): Oceanographical and geological background, in: The South China Sea: Paleoceanography and sedimentology, Developments in Paleoenvironmental Research, Springer, The Netherlands, 25–49, https://doi.org/10.1007/978-1-4020-9745-4_1, 2009.
Wassmann, P., Ypma, J. E., and Tselepides, A.: Vertical flux of faecal pellets and microplankton on the shelf of the oligotrophic Cretan Sea (NE Mediterranean Sea), Prog. Oceanogr., 46, 241–258, https://doi.org/10.1016/s0079-6611(00)00021-5, 2000.
Wexels Riser, C., Reigstad, M., Wassmann, P., Arashkevich, E., and Falk-Petersen, S.: Export or retention? Copepod abundance, faecal pellet production and vertical flux in the marginal ice zone through snap shots from the northern Barents Sea, Polar. Biol., 30, 719–730, https://doi.org/10.1007/s00300-006-0229-z, 2007.
Wexels Riser, C., Reigstad, M., and Wassmann, P.: Zooplankton-mediated carbon export: A seasonal study in a northern Norwegian fjord, Mar. Biol. Res., 6, 461–471, https://doi.org/10.1080/17451000903437067, 2010.
Wilson, S. E., Steinberg, D. K., and Buesseler, K. O.: Changes in fecal pellet characteristics with depth as indicators of zooplankton repackaging of particles in the mesopelagic zone of the subtropical and subarctic North Pacific Ocean, Deep-Sea Res. Pt. II, 55, 1636–1647, https://doi.org/10.1016/j.dsr2.2008.04.019, 2008.
Wilson, S. E., Ruhl, H. A., and Smith, K. L.: Zooplankton fecal pellet flux in the abyssal northeast Pacific: A 15 year time-series study, Limnol. Oceanogr., 58, 881–892, https://doi.org/10.4319/lo.2013.58.3.0881, 2013.
Wong, G. T. F., Pan, X., Li, K.-Y., Shiah, F.-K., Ho, T.-Y., and Guo, X.: Hydrography and nutrient dynamics in the Northern South China Sea Shelf-sea (NoSoCS), Deep-Sea Res. Pt. II, 117, 23–40, https://doi.org/10.1016/j.dsr2.2015.02.023, 2015.
Zhang, J., Li, H., Xuan, J., Wu, Z., Yang, Z., Wiesner, M. G., and Chen, J.: Enhancement of mesopelagic sinking particle fluxes due to upwelling, aerosol deposition, and monsoonal influences in the northwestern South China Sea, J. Geophys. Res-Oceans., 124, 99–112, https://doi.org/10.1029/2018jc014704, 2019.
Zhang, J., Li, H., Wiesner, M. G., Eglinton, T. I., Haghipour, N., Jian, Z., and Chen, J.: Carbon isotopic constraints on basin-scale vertical and lateral particulate organic carbon dynamics in the northern South China Sea, J. Geophys. Res-Oceans., 127, e2022JC018830, https://doi.org/10.1029/2022JC018830, 2022.
Zhao, Y., Liu, Z., Zhang, Y., Li, J., Wang, M., Wang, W., and Xu, J.: In situ observation of contour currents in the northern South China Sea: Applications for deepwater sediment transport, Earth. Planet. Sc. Lett., 430, 477–485, https://doi.org/10.1016/j.epsl.2015.09.008, 2015.
Short summary
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.
The sinking of zooplankton fecal pellets is a key process in the marine biological carbon pump....
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