Articles | Volume 10, issue 5
https://doi.org/10.5194/bg-10-3405-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/bg-10-3405-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
23 May 2013
Research article |
| 23 May 2013
Bioavailability of sinking organic matter in the Blanes canyon and the adjacent open slope (NW Mediterranean Sea)
P. Lopez-Fernandez
GRC Geociències Marines, Dept. d'Estratigrafia, Paleontologia i Geociències Marines, Universitat de Barcelona, 08028 Barcelona, Spain
S. Bianchelli
Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
A. Pusceddu
Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
A. Calafat
GRC Geociències Marines, Dept. d'Estratigrafia, Paleontologia i Geociències Marines, Universitat de Barcelona, 08028 Barcelona, Spain
A. Sanchez-Vidal
GRC Geociències Marines, Dept. d'Estratigrafia, Paleontologia i Geociències Marines, Universitat de Barcelona, 08028 Barcelona, Spain
R. Danovaro
Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
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Thibauld M. Béjard, Andrés S. Rigual-Hernández, Javier P. Tarruella, José-Abel Flores, Anna Sanchez-Vidal, Irene Llamas-Cano, and Francisco J. Sierro
Biogeosciences, 21, 4051–4076, https://doi.org/10.5194/bg-21-4051-2024, https://doi.org/10.5194/bg-21-4051-2024, 2024
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The Mediterranean Sea is regarded as a climate change hotspot. Documenting the population of planktonic foraminifera is crucial. In the Sicily Channel, fluxes are higher during winter and positively linked with chlorophyll a concentration and cool temperatures. A comparison with other Mediterranean sites shows the transitional aspect of the studied zone. Finally, modern populations significantly differ from those in the sediment, highlighting a possible effect of environmental change.
Alessandra D'Angelo, Federico Giglio, Stefano Miserocchi, Anna Sanchez-Vidal, Stefano Aliani, Tommaso Tesi, Angelo Viola, Mauro Mazzola, and Leonardo Langone
Biogeosciences, 15, 5343–5363, https://doi.org/10.5194/bg-15-5343-2018, https://doi.org/10.5194/bg-15-5343-2018, 2018
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A 6-year time series of physical parameters and particle fluxes collected by a mooring in Kongsfjorden (Svalbard) suggests that the subglacial and watershed run-off driven by air temperature are the main processes affecting the lithogenic supply. As the Arctic temperature rises, glacier material will increase accordingly. The winter inflow of warm Atlantic waters is progressively increasing, hampering the nutrient supply from the bottom waters and severely reducing the biological production.
R. Pedrosa-Pàmies, C. Parinos, A. Sanchez-Vidal, A. Gogou, A. Calafat, M. Canals, I. Bouloubassi, and N. Lampadariou
Biogeosciences, 12, 7379–7402, https://doi.org/10.5194/bg-12-7379-2015, https://doi.org/10.5194/bg-12-7379-2015, 2015
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A multi-proxy approach is applied in surface sediments collected from deep slopes and basins (1018-4087 m depth) of the oligotrophic eastern Mediterranean Sea. This study sheds new light on the sources and transport mechanisms along with the impact of preservation vs. diagenetic processes on the composition of sedimentary organic matter in the deep basins of the oligotrophic eastern Mediterranean Sea.
M. Higueras, P. Kerhervé, A. Sanchez-Vidal, A. Calafat, W. Ludwig, M. Verdoit-Jarraya, S. Heussner, and M. Canals
Biogeosciences, 11, 157–172, https://doi.org/10.5194/bg-11-157-2014, https://doi.org/10.5194/bg-11-157-2014, 2014
C. Parinos, A. Gogou, I. Bouloubassi, R. Pedrosa-Pàmies, I. Hatzianestis, A. Sanchez-Vidal, G. Rousakis, D. Velaoras, G. Krokos, and V. Lykousis
Biogeosciences, 10, 6069–6089, https://doi.org/10.5194/bg-10-6069-2013, https://doi.org/10.5194/bg-10-6069-2013, 2013
S. Bianchelli, C. Gambi, M. Mea, A. Pusceddu, and R. Danovaro
Biogeosciences, 10, 5465–5479, https://doi.org/10.5194/bg-10-5465-2013, https://doi.org/10.5194/bg-10-5465-2013, 2013
A. Rumín-Caparrós, A. Sanchez-Vidal, A. Calafat, M. Canals, J. Martín, P. Puig, and R. Pedrosa-Pàmies
Biogeosciences, 10, 3493–3505, https://doi.org/10.5194/bg-10-3493-2013, https://doi.org/10.5194/bg-10-3493-2013, 2013
J. Martín, X. Durrieu de Madron, P. Puig, F. Bourrin, A. Palanques, L. Houpert, M. Higueras, A. Sanchez-Vidal, A. M. Calafat, M. Canals, S. Heussner, N. Delsaut, and C. Sotin
Biogeosciences, 10, 3221–3239, https://doi.org/10.5194/bg-10-3221-2013, https://doi.org/10.5194/bg-10-3221-2013, 2013
A. Dell'Anno, A. Pusceddu, C. Corinaldesi, M. Canals, S. Heussner, L. Thomsen, and R. Danovaro
Biogeosciences, 10, 2945–2957, https://doi.org/10.5194/bg-10-2945-2013, https://doi.org/10.5194/bg-10-2945-2013, 2013
A. Pusceddu, M. Mea, M. Canals, S. Heussner, X. Durrieu de Madron, A. Sanchez-Vidal, S. Bianchelli, C. Corinaldesi, A. Dell'Anno, L. Thomsen, and R. Danovaro
Biogeosciences, 10, 2659–2670, https://doi.org/10.5194/bg-10-2659-2013, https://doi.org/10.5194/bg-10-2659-2013, 2013
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Biogeochemistry: Organic Biogeochemistry
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Elemental stoichiometry of particulate organic matter across the Atlantic Ocean
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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
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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
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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
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Diapycnal dissolved organic matter supply into the upper Peruvian oxycline
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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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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.
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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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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.
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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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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.
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.
Cited articles
Amblas, D., Canals, M., Urgeles, R., Lastras, G., Liquete, C., Hughes-Clarke, J., Casamor, J. L., and Calafat, A. M.: Morphogenetic mesoscale analysis of the northeastern Iberian margin, NW Mediterranean Basin, Mar. Geol., 234, 3–20, 2006
Anderson, M. J.: A new method for non-parametric multivariate analysis of variance, Austral. Ecol., 26, 32–46, 2001.
Bianchelli, S., Gambi, C., Pusceddu, A., and Danovaro, R.: Trophic conditions of sediments in a deep-sea canyon in the Adriatic Sea, Chem. Ecol., 24, 101–109, 2008
Bonnin, J., Heussner, S., Calafat, A., Fabres, J., Palanques, A., Durrieu de Madron, X., Canals, M., Puig, P., Avril, J., and Delsaut N.: Comparison of horizontal and downward particle fluxes across canyons of the Gulf of Lions (NW Mediterranean): Meteorological and hydrodynamical forcing, Cont. Shelf Res., 28, 15, 1957–1970, 2008
Bourgeois, S., Pruski, A. M., Sun, M.-Y., Buscail, R., Lantoine, F., Kerhervé, P., Vétion, G., Rivière, B., and Charles, F.: Distribution and lability of land-derived organic matter in the surface sediments of the Rhône prodelta and the adjacent shelf (Mediterranean Sea, France): a multi proxy study, Biogeosciences, 8, 3107–3125, https://doi.org/10.5194/bg-8-3107-2011, 2011.
Canals, M., Puig, P., Durrieu de Madron, X., Heussner, S., Palanques, A., and Fabres, J.: Flushing submarine canyons, Nature, 444, 354–357, 2006.
Danovaro, R.: Methods for the Study of Deep-Sea Sediments, Their Functioning and Biodiversity, CRC Press, Boca Raton, US, 428 pp. 2010.
Danovaro, R., Dinet, A., Duineveld, G., and Tselepides, A.: Benthic response to particulate fluxes in different trophic environments: a comparison between the Gulf of Lions–Catalan Sea (western-Mediterranean) and the Cretan Sea (eastern-Mediterranean), Prog. Oceanogr., 44, 287–312, 1999.
Danovaro, R., Dell'Anno, A., Fabiano, M., Pusceddu, A., and Tselepides, A.: Deep-sea ecosystem response to climate changes: the eastern Mediterranean case study, Trends Ecol. Evol., 16, 505–510, 2001.
Danovaro, R., Bianchelli, S., Gambi, C., Mea, M., and Zeppilli, D.: $\alpha $-, β-, γ-, δ- and $\varepsilon $-diversity of deep-sea nematodes in canyons and open slopes of Northeast Atlantic and Mediterranean margins, Mar. Ecol.-Prog. Ser., 396, 197–209, 2009.
Dauwe, B., Middelburg, J. J., Van-Rijswijk, P., Sinke, J., Herman, P. M. J., and Heip, C. H. R.: Enzymatically hydrolyzable amino acids in North Sea sediments and their possible implication for sediment nutritional values, J. Mar. Res., 57, 109–134, 1999.
Dell'Anno, A., Fabiano, M., Mei, M. L., and Danovaro, R.: Enzymatically hydrolysed protein and carbohydrates pools in deep-sea sediments: estimates of the bioavailable fraction and methodological considerations, Mar. Ecol.-Prog. Ser., 196, 15–23, 2000.
Dell'Anno, A., Mei, M.L., Pusceddu, A., and Danovaro, R.: Assessing the trophic state and eutrophication of coastal marine systems: a new approach based on the biochemical composition of sediment organic matter, Mar. Pollut. Bull., 44, 611–622, 2002.
Dell'Anno, A., Pusceddu, A., Corinaldesi, C., Canals, M., Heussner, S., and Danovaro, R.: Trophic state of deep-sea sediments of continental margins: a biomimetic approach, Biogeosciences, in press, 2013.
Druffel, E. R. M. and Robinson, B. H.: Is the Deep-Sea on a Diet?, Science: 284. 5417, 1139-1140, 1999. Estrada, M.: Primary production in the northwestern Mediterranean, Sci. Mar., 60, 55–64, 1996.
Estrada, M.: Primary production in the northwestern Mediterranean, Sci. Mar., 60, 55–64, 1996.
Fabiano, M. and Pusceddu, A.: Total and hydrolizable particulate organic matter (carbohydrates, proteins and lipids) at a coastal station in Terra Nova Bay (Ross Sea, Antarctica), Polar Biol., 19, 125–132, 1998.
Fabiano, M., Danovaro, R., and Fraschetti, S.: A three-year time series of elemental and biochemical composition of organic matter in subtidal sandy sediments of the Ligurian Sea (northwestern Mediterranean), Cont. Shelf Res., 15, 1453–1469, 1995.
Fabres, J., Calafat, A., Canals, M., Barcena, M. A., and Flores, J. A.: Bransfield Basin fine-grained sediments: late-Holocene sedimentary processes and Antarctic oceanographic conditions, Holocene, 10, 703–718, 2000.
Fabres, J., Tesi, T., Velez, J., Batista, F., Lee, C., Calafat, A., Heussner, S., Palanques, A., and Miserocchi, S.: Seasonal and event-controlled export of organic matter from the shelf towards the Gulf of Lions continental slope, Cont. Shelf Res., 28, 1971–1983, 2008.
Gage, J. D. and Tyler, P. A.,: Deep-Sea Biology: A Natural History of Organisms at the Deep-Sea Floor, Cambridge University Press, Cambridge, 504, 1991.
Gardner, W. D., Richardson, M. J., Hinga, K. R., and Biscaye, P. E.: Resuspension measured with sediment traps in a high-energy environment, Earth Planet. Sci. Lett., 66, 262–278, 1983.
Gerchacov, S. M. and Hatcher, P. G.: Improved technique for analysis of carbohydrates in sediment, Limnol. Oceanogr., 17, 938–943, 1972.
Glover, G., Gooday, A. J,. Bailey, D. M,. Billett, D. S. M, Chevaldonné, P., Colaço, A., Copley, J., Cuvelier, D., Desbruyères, D., Kalogeropoulou, V., Klages, M., Lampadariou, N., Lejeusne, C., Mestre, N. C., Paterson, G. L. J., Perez, T., Ruhl, H., Sarrazin, J., Soltwedel, T., Soto, E. H., Thatje, S., Tselepides, A., Van Gaever, S., and Vanreusel, A.: Chapter One: Temporal Change in Deep-Sea Benthic Ecosystems: A Review of the Evidence From Recent Time-Series Studies, Adv. Mar. Biol., 58, 1–95, 2010
Grémare, A., Amouroux, J. M., Charles, F., Dinet, A., Riaux-Gobin, C., Baudart, J., Medernach, L., Bodiou, J. Y., Vétion, G., Colomines, J. C., and Albert, P.: Temporal changes in the biochemical composition and nutritional value of the particulate organic matter available to surface deposit-feeders: a 2-year study, Mar. Ecol.-Prog. Ser. 150, 195–206, 1997.
Grémare, A. , Amouroux, J.-M., Charles, F., Medernach, L., Jordana, E., Nozais, C., Vétion, G., and Colomines, J.-C.: Temporal changes in the biochemical composition of particulate organic matter sedimentation in the Bay of Banyuls-sur-Mer, Oceanol. Acta, 21, 783–792, 1998.
Grémare, A., Medernach, L., deBovée, F., Amouroux, J. M., Vétion, G., and Albert, P.: Relationships between sedimentary organics and benthic meiofauna on the continental shelf and the upper slope of the Gulf of Lions (NW Mediterranean), Mar. Ecol.-Prog. Ser., 234, 85–94, 2002.
Grémare, A., Medernach, L. , deBovée, F., Amouroux, J. M. , Charles, F. , Dinet, A., Vétion, G., Albert, P., and Colomines, J. C.: Relationship between sedimentary organic matter and benthic fauna within the Gulf of Lion: synthesis on the identification of new biochemical descriptors of sedimentary organic nutritional value, Oceanol. Acta, 26, 391–406, 2003.
Grémare, A., Gutíerrez, D., Anschutz, P., Amouroux, J. M., Deflandre, B., and Vétion, G.: Spatio temporal changes in totally and enzymatically hydrolyzable amino acids of superficial sediments from three contrasted areas, Prog. Oceanogr., 65, 89–111, 2005.
Harris, P. T. and Whiteway, T.: Global distribution of large submarine canyons: Geomorphic differences between active and passive continental margins, Mar. Geol., 285, 69–86, 2011.
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.
Lastras, G., Canals, M., Amblas, D., Lavoie, C., Church, I., De Mol, B., Duran, R., Calafat, A. M., Hughes-Clarke, J. E., Smith, C. J., and Heussner, S.: Understanding sediment dynamics of two large submarine valleys from seafloor data: Blanes and La Fonera canyons, northwestern Mediterranean Sea, Mar. Geol., 280, 20–39, 2011.
Lee, I. H. Lien, R. C., Liu, J. T., and Chuang, W. :Turbulent mixing and internal tides in Gaoping (Kaoping) Submarine Canyon, Taiwan, J. Marine Syst., 76, 383–396, 2009.
Levin, L. A. and Dayton, P. K.: Ecological theory and continental margins: where shallow meets deep, Trends Ecol. Evol., 24, 606–617, 2009.
López-Fernández, P., Calafat, A. M., Sanchez-Vidal, A. S., Cateura, J., Company, J. B., Flexas, M. M., and Canals, M.: Multiple drivers of particle fluxes in the Blanes submarine canyon and adjacent open slope: results of a year round experiment, Prog. Oceanogr., submitted, 2013.
Lorenzen, C. J. and Jeffrey, S. W.: Determination of chlorophyll in seawater: report of intercalibration tests, UNESCO Technical Papers in Marine Science, 35, 1–20, 1980.
Marsh, J. B. and Wenstein, D. B.: A simple charring method for determination of lipids, J. Lipid Res., 7, 574–576, 1966.
Martín, J., Palanques, A., and Puig, P.: Composition and variability of downward particulate matter fluxes in the Palamós submarine canyon (NW Mediterranean), J. Marine Syst., 60, 75–97, 2006.
Mayer, L. M.: The inertness of being organic, Mar. Chem. 92, 135–140, 2004.
Mayer, L. M., Schick, L. L., Sawyer, T., Plante, C. J., Jumars, P. A., and Self, R. L.: Bioavailable amino acids in sediments: a biomimetic, kinetics-based approach, Limnol. Oceanogr., 40, 511–520, 1995.
McArdle, B. H. and Anderson, M. J.: Fitting multivariate models to community data: a comment on distance-based redundancy analysis, Ecology, 82, 290–297, 2001.
Medernach, L. M., Grémare, A., Amouroux, J. M., Colomines, J. C., and Vétion, G.: Temporal changes in the amino acid contents of particulate organic matter sedimenting in the Bay of Banyuls-sur-Mer (northwestern Mediterranean), Mar. Ecol.-Prog. Ser., 214, 55–65, 2001.
Misic, C. and Covazzi-Harriague, A.: Organic matter recycling in a shallow coastal zone (NW Mediterranean): The influence of local and global climatic forcing and organic matter lability on hydrolytic enzyme activity, Cont. Shelf Res., 28, 2725–2735, 2008.
Monaco, A., Durrieu de Madron, X., Radakovitch, O., Heussner, S., and Carbonne, J.: Origin and variability of downward biogeochemical fluxes on the Rhone continental margin (NW mediterranean), Deep-Sea Res. Pt. I, 46, 1483–1511, 1999.
Mullenbach, B. L., Nittrouer, C. A., and Puig, P.: Sediment deposition in a modern submarine canyon: Eel Canyon, northern California, Mar. Geol., 211, 101–119, 2004.
Murray, J. W.: The oceans, International Geophysics, 50, 175–211, 1992.
Owens, S. A., Buesseler, K. O., Lamborg, C. H., Valdes, J., Lomas, M. W., Johnson, R. J., Steinberg, D. K., and Siegel, D. A.: A new time series of particle export from neutrally buoyant sediments traps at the Bermuda Atlantic Time-series Study site, Deep-Sea Res. Pt. I, 72, 34–47, 2013.
Palanques, A., Durrieu de Madron, X., Puig, P., Fabres, J., Guillén, J., Calafat, A., Canals, M., and Bonnin, J.: Suspended sediment fluxes and transport processes in the Gulf of Lions submarine canyons. The role of storms and dense water cascading, Mar. Geol., 234, 43–61, 2006.
Palanques, A., Guillén, J., Puig, P., and Durrieu de Madron, X.: Storm-driven shelf-to-canyon suspended sediment transport at the southwestern Gulf of Lions, Cont. Shelf Res., 28, 1947–1956, 2008.
Palanques, A., Puig, P., Durrieu de Madron, X., Sanchez-Vidal, A., Pasqual, C., Mart\i n, J., Calafat, A., Heussner, S., and Canals, M.: Sediment transport to the deep canyons and open-slope of the Western Gulf of Lions during the 2006 intense cascading and open-sea convection period, Prog. Oceanogr., 16, 1–15, 2012.
Pasqual, C., Sanchez-Vidal, A., Zúñiga, D., Calafat, A., Canals, M., Durrieu de Madron, X., Puig, P., Heussner, S., Palanques, A., and Delsaut, N.: Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading, Biogeosciences, 7, 217–231, https://doi.org/10.5194/bg-7-217-2010, 2010.
Pasqual, C., Lee, C., Goñi, M., Tesi, T., Sanchez-Vidal, A., Calafat, A., Canals, M., and Heussner, S.: Use of organic biomarkers to trace the transport of marine and terrigenous organic matter through the southwestern canyons of the Gulf of Lion, Mar. Chem., 126, 1–12, 2011.
Pinckney, J., Papa, R., and Zingmark, R.: Comparison of high-performance liquid chromatographic, spectrophotometric, and fluorometric methods for determining chlorophyll a concentrations in estaurine sediments, J. Microbiol. Meth., 19, 59–66, 1994.
Puig, P. and Palanques, A.: Temporal variability and composition of settling particle fluxes on the Barcelona continental margin (northwestern Mediterranean), J. Mar. Res., 56, 639–654, 1998.
Pulido-Villena, E., Wagener, T., and Guieu, C.: Bacterial response to dust pulses in the western Mediterranean: Implications for carbon cycling in the oligotrophic ocean, Global Biogeochem. Cy., 22, GB1020, https://doi.org/10.1029/2007GB003091, 2008.
Pusceddu, A., Dell'Anno, A., and Fabiano, M.: Organic matter composition in coastal sediments at Terra Nova Bay (Ross Sea) during summer 1995, Polar Biol., 23, 288–293, 2000.
Pusceddu, A., Dell'Anno, A., Danovaro, R., Manini, E., Sarà, G., and Fabiano, M.: Enzymatically hydrolyzable protein and carbohydrate sedimentary pools as indicators of the trophic state of 'detritus sink' systems: a case study in a Mediterranean coastal lagoon, Estuaries, 26, 641–650, 2003.
Pusceddu, A., Dell'Anno, A., Fabiano, M., and Danovaro, R.: Quantity, biochemical composition and bioavailability of sediment organic matter as complementary signatures of benthic trophic status, Mar. Ecol.-Prog. Ser., 375, 41–52, 2009.
Pusceddu, A., Bianchelli, S., Canals, M., Sanchez-Vidal, A., Durrieu De Madron, X., Heussner, S., Lykousis, V., de Stigter, H., Trincardi, F., and Danovaro, R.: Organic matter in sediments of canyons and open slopes of the Portuguese, Catalan, Southern Adriatic and Cretan Sea margins, Deep-Sea Res. Pt. I, 57, 441–457, 2010a.
Pusceddu, A., Mea, M., Gambi, C., Bianchelli, S., Canals, M., Sanchez-Vidal, A., Calafat, A., Heussner, S., Durrieu De Madron, X., Avril, J., Thomsen, L., Garcìa, R., and Danovaro R.: Ecosystem effects of dense water formation on deep Mediterranean ecosystems: an overview, Adv. Oceanogr. Limnol., 1, 67–84, 2010b.
Pusceddu, A., Mea, M., Canals, M., Heussner, S., Durrieu de Madron, X., Sanchez-Vidal, A., Bianchelli, S., Corinaldesi, C., Dell'Anno, A., Thomsen, L., and Danovaro, R.: Major consequences of an intense dense shelf water cascading event on deep-sea benthic trophic conditions and meiofaunal biodiversity, Biogeosciences, 10, 2659–2670, https://doi.org/10.5194/bg-10-2659-2013, 2013.
Pyke, G. H., Pulliam, H. R., and Charnov, E. L.: Optimal foraging: a selective review of theory and tests, Quarterly Rev. Biol., 52, 137–154, 1977.
Rice, D. L.: The detritus nitrogen problem: new observations and perspectives from organic geochemistry, Mar. Ecol.-Progr. Ser., 9, 153–162, 1982.
Rossi, S., Grémare, A., Gili, J., Amouroux, J., Jordana, E., and Vétion, G.: Biochemical characteristics of settling particulate organic matter at two north-western Mediterranean sites: a seasonal comparison, Estuar. Coast. Shelf S., 58, 423–434, 2003.
Rovira, A. and Batalla, R. J.: Temporal distribution of suspended sediment transport in a Mediterranean basin: The lower Tordera (NE SPAIN), Geomorphology, 79, 58–71, 2006
Sanchez-Vidal, A., Pasqual, C., Kerherve, P., Heussner, S., Calafat, A., Palanques, A., Durrieu de Madron, X., Canals, M., and Puig, P.: Across margin export of organic matter by cascading events traced by stable isotopes, northwestern Mediterranean Sea, Limnol. Oceanogr., 54, 1488–1500, 2009.
Sanchez-Vidal, A., Canals, M., Calafat, A.M., Lastras, G., Pedrosa-Pàmies, R., Menéndez, M., Medina, R., Company, J. B., Hereu, B., Romero, J., and Alcovero, T.: Impacts on the deep-sea ecosystem by a severe coastal storm, PLoS ONE 7, e30395, https://doi.org/10.1371/journal.pone.0030395, 2012.
Shoener, T. W.: Theory of feeding strategies, Ann. Rev. Ecol. Syst., 11, 369–404, 1971,
Smith, C. R., De Leo, F.C., Bernardino, A. F., Sweetman, A. K., and Martinez Arbizu, P.: Abyssal food limitation, ecosystem structure and climate change, Trends Ecol. Evol., 23, 518–528, 2008.
Smith, K. L., Ruhl, H. A., Bett, B. J., Billett, D. S. M., Lampitt, R. S., and Kaufmann, R. S.: Climate, carbon cycling and deep-ocean ecosystems, P. Nat. Acad. Sci. USA, 106, 19211–19218, 2009.
Soetaert, K. and Van Oevelen, D.: Modeling Food Web Interactions in Benthic Deep-Sea Ecosystems, Oceanography, 22, 1, 128–143, 2010.
Szymczak-Zyla, M. and Kowalewska, G.: Chloropigments ad in the Gulf of Gdansk (Baltic Sea) as markers of the state of this environment, Mar. Pollut. Bull., 55, 512–528, 2007.
Taylor, G. T., Karl, D. M., and Pace, M. L.: Impact of bacteria and zooflagellates on the composition of sinking particles: an in situ experiment, Mar. Ecol.-Prog. Ser., 29, 141–155. 1986.
Tesi, T., Langone, L., Goñi, M. A., Turchetto, M., Miserocchi, S., and Boldrin, A.: Source and composition of organic matter in the Bari canyon (Italy): dense water cascading versus particulate export from the upper ocean, Deep-Sea Res. I, 55, 813–831, 2008.
Van Oevelen, D., Soetaert, K., Novoa, R.G., de Stigter, H., Cunha, M. R., Pusceddu, A., and Danovaro, R.: Canyon conditions impact carbon flows in food webs of three sections of the Nazare canyon, Deep-Sea Res. Pt. II, 58, 2461–2476, 2011.
Vandewiele, S. , Cowie, G., Soetaert, K., and Middelburg, J. J.: Amino acid biogeochemistry and organic matter degradation state across the Pakistan margin oxygen minimum zone, Deep-Sea Res. II, 56, 318–334, 2009.
Wakeham, S. G., Freeman, K. H., Pease, T. K., and Hayes, J. M.: A photoautotrophic source for lycopane in marine water columns, Geochim. Cosmochim. Ac., 57, 159–165, 1993.
Wakeham, S. G., Hedges, J. I., Lee, C., Peterson, M. L., and Hernes, P. J.: Compositions and transport of lipid biomarkers through the water column and surficial sediments of the equatorial Pacific Ocean, Deep-Sea Res. Pt. II, 44, 2131–2162, 1997.
Walsh, J. J.: Importance of continental margins in the marine biogeochemical cycling of carbon and nitrogen, Nature, 350, 53–55, 1991.
Weaver, P., Billett, D. S. M., Boetius, A., Danovaro, R., Freiwald, A., and Sibuet, M.: Hotspot ecosystem Research on the Margins of European Seas, Oceanography, 17, 132–144, 2004.
Witbaard, R., Duineveld, G. C. A., Van der Weele, J. A., Berghuis, E. M., and Reyss, J. P.: The benthic response to the seasonal deposition of phytopigments at the Porcupine Abyssal Plain in the North East Atlantic, Prog. Oceanogr., 43, 15–31, 2000.
Zúñiga, D., Calafat, A., Heussner, S., Miserocchi, S., Sanchez-Vidal, A., Garcia-Orellana, J., Canals, M., Sanchez-Cabeza, J.A., Carbonne, J., Delsaut, N., and Saragoni, G.: Compositional and temporal evolution of particle fluxes in the open Algero–Balearic basin (Western Mediterranean), J. Marine Syst., 70, 196–214, 2008.
Zúñiga, D., Flexas, M.M., Sanchez-Vidal, A., Coenjaerts, J., Calafat, A., Jordi, G., García-Orellana, J., Puigdefábregas, J., Canals, M., Espino, M., Sardá, F. and Company, J. B.: Particle fluxes dynamics in Blanes submarine canyon (Northwestern Mediterranean), Prog. Oceanogr., 82, 239–251, 2009.
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