Articles | Volume 19, issue 5
https://doi.org/10.5194/bg-19-1421-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-1421-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Ideas and perspectives
| Highlight paper
| 
09 Mar 2022
Ideas and perspectives | Highlight paper |
| 09 Mar 2022
| 09 Mar 2022
Ideas and perspectives: Sea-level change, anaerobic methane oxidation, and the glacial–interglacial phosphorus cycle
Bjorn Sundby
ISMER, Université du Québec à Rimouski, Rimouski, QC,
Canada H4C 3J9
GEOTOP and Earth & Planetary Sciences, McGill University, Montreal, QC, Canada H3A 0E8
Pierre Anschutz
CORRESPONDING AUTHOR
Université de Bordeaux, CNRS, EPOC, EPHE, UMR 5805, 33615 Pessac, France
Pascal Lecroart
Université de Bordeaux, CNRS, EPOC, EPHE, UMR 5805, 33615 Pessac, France
Alfonso Mucci
GEOTOP and Earth & Planetary Sciences, McGill University, Montreal, QC, Canada H3A 0E8
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William A. Nesbitt, Samuel W. Stevens, Alfonso O. Mucci, Lennart Gerke, Toste Tanhua, Gwénaëlle Chaillou, and Douglas W. R. Wallace
EGUsphere, https://doi.org/10.5194/egusphere-2025-2400, https://doi.org/10.5194/egusphere-2025-2400, 2025
This preprint is open for discussion and under review for Ocean Science (OS).
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We use 20 years of oxygen measurements and recent carbon data with a tracer-calibrated 1D model to quantify oxygen loss and inorganic carbon accumulation in the deep waters of the Gulf and St. Lawrence Estuary. We further utilize the model to give a first estimate of the impact of adding pure oxygen, a by-product from green hydrogen production to these deep waters. Results show this could restore oxygen to year-2000 levels, but full recovery would require a larger input.
Mathilde Jutras, Alfonso Mucci, Gwenaëlle Chaillou, William A. Nesbitt, and Douglas W. R. Wallace
Biogeosciences, 20, 839–849, https://doi.org/10.5194/bg-20-839-2023, https://doi.org/10.5194/bg-20-839-2023, 2023
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The deep waters of the lower St Lawrence Estuary and gulf have, in the last decades, experienced a strong decline in their oxygen concentration. Below 65 µmol L-1, the waters are said to be hypoxic, with dire consequences for marine life. We show that the extent of the hypoxic zone shows a seven-fold increase in the last 20 years, reaching 9400 km2 in 2021. After a stable period at ~ 65 µmol L⁻¹ from 1984 to 2019, the oxygen level also suddenly decreased to ~ 35 µmol L-1 in 2020.
Flavienne Bruyant, Rémi Amiraux, Marie-Pier Amyot, Philippe Archambault, Lise Artigue, Lucas Barbedo de Freitas, Guislain Bécu, Simon Bélanger, Pascaline Bourgain, Annick Bricaud, Etienne Brouard, Camille Brunet, Tonya Burgers, Danielle Caleb, Katrine Chalut, Hervé Claustre, Véronique Cornet-Barthaux, Pierre Coupel, Marine Cusa, Fanny Cusset, Laeticia Dadaglio, Marty Davelaar, Gabrièle Deslongchamps, Céline Dimier, Julie Dinasquet, Dany Dumont, Brent Else, Igor Eulaers, Joannie Ferland, Gabrielle Filteau, Marie-Hélène Forget, Jérome Fort, Louis Fortier, Martí Galí, Morgane Gallinari, Svend-Erik Garbus, Nicole Garcia, Catherine Gérikas Ribeiro, Colline Gombault, Priscilla Gourvil, Clémence Goyens, Cindy Grant, Pierre-Luc Grondin, Pascal Guillot, Sandrine Hillion, Rachel Hussherr, Fabien Joux, Hannah Joy-Warren, Gabriel Joyal, David Kieber, Augustin Lafond, José Lagunas, Patrick Lajeunesse, Catherine Lalande, Jade Larivière, Florence Le Gall, Karine Leblanc, Mathieu Leblanc, Justine Legras, Keith Lévesque, Kate-M. Lewis, Edouard Leymarie, Aude Leynaert, Thomas Linkowski, Martine Lizotte, Adriana Lopes dos Santos, Claudie Marec, Dominique Marie, Guillaume Massé, Philippe Massicotte, Atsushi Matsuoka, Lisa A. Miller, Sharif Mirshak, Nathalie Morata, Brivaela Moriceau, Philippe-Israël Morin, Simon Morisset, Anders Mosbech, Alfonso Mucci, Gabrielle Nadaï, Christian Nozais, Ingrid Obernosterer, Thimoté Paire, Christos Panagiotopoulos, Marie Parenteau, Noémie Pelletier, Marc Picheral, Bernard Quéguiner, Patrick Raimbault, Joséphine Ras, Eric Rehm, Llúcia Ribot Lacosta, Jean-François Rontani, Blanche Saint-Béat, Julie Sansoulet, Noé Sardet, Catherine Schmechtig, Antoine Sciandra, Richard Sempéré, Caroline Sévigny, Jordan Toullec, Margot Tragin, Jean-Éric Tremblay, Annie-Pier Trottier, Daniel Vaulot, Anda Vladoiu, Lei Xue, Gustavo Yunda-Guarin, and Marcel Babin
Earth Syst. Sci. Data, 14, 4607–4642, https://doi.org/10.5194/essd-14-4607-2022, https://doi.org/10.5194/essd-14-4607-2022, 2022
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This paper presents a dataset acquired during a research cruise held in Baffin Bay in 2016. We observed that the disappearance of sea ice in the Arctic Ocean increases both the length and spatial extent of the phytoplankton growth season. In the future, this will impact the food webs on which the local populations depend for their food supply and fisheries. This dataset will provide insight into quantifying these impacts and help the decision-making process for policymakers.
Philippe Massicotte, Rainer M. W. Amon, David Antoine, Philippe Archambault, Sergio Balzano, Simon Bélanger, Ronald Benner, Dominique Boeuf, Annick Bricaud, Flavienne Bruyant, Gwenaëlle Chaillou, Malik Chami, Bruno Charrière, Jing Chen, Hervé Claustre, Pierre Coupel, Nicole Delsaut, David Doxaran, Jens Ehn, Cédric Fichot, Marie-Hélène Forget, Pingqing Fu, Jonathan Gagnon, Nicole Garcia, Beat Gasser, Jean-François Ghiglione, Gaby Gorsky, Michel Gosselin, Priscillia Gourvil, Yves Gratton, Pascal Guillot, Hermann J. Heipieper, Serge Heussner, Stanford B. Hooker, Yannick Huot, Christian Jeanthon, Wade Jeffrey, Fabien Joux, Kimitaka Kawamura, Bruno Lansard, Edouard Leymarie, Heike Link, Connie Lovejoy, Claudie Marec, Dominique Marie, Johannie Martin, Jacobo Martín, Guillaume Massé, Atsushi Matsuoka, Vanessa McKague, Alexandre Mignot, William L. Miller, Juan-Carlos Miquel, Alfonso Mucci, Kaori Ono, Eva Ortega-Retuerta, Christos Panagiotopoulos, Tim Papakyriakou, Marc Picheral, Louis Prieur, Patrick Raimbault, Joséphine Ras, Rick A. Reynolds, André Rochon, Jean-François Rontani, Catherine Schmechtig, Sabine Schmidt, Richard Sempéré, Yuan Shen, Guisheng Song, Dariusz Stramski, Eri Tachibana, Alexandre Thirouard, Imma Tolosa, Jean-Éric Tremblay, Mickael Vaïtilingom, Daniel Vaulot, Frédéric Vaultier, John K. Volkman, Huixiang Xie, Guangming Zheng, and Marcel Babin
Earth Syst. Sci. Data, 13, 1561–1592, https://doi.org/10.5194/essd-13-1561-2021, https://doi.org/10.5194/essd-13-1561-2021, 2021
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The MALINA oceanographic expedition was conducted in the Mackenzie River and the Beaufort Sea systems. The sampling was performed across seven shelf–basin transects to capture the meridional gradient between the estuary and the open ocean. The main goal of this research program was to better understand how processes such as primary production are influencing the fate of organic matter originating from the surrounding terrestrial landscape during its transition toward the Arctic Ocean.
Chantal Mears, Helmuth Thomas, Paul B. Henderson, Matthew A. Charette, Hugh MacIntyre, Frank Dehairs, Christophe Monnin, and Alfonso Mucci
Biogeosciences, 17, 4937–4959, https://doi.org/10.5194/bg-17-4937-2020, https://doi.org/10.5194/bg-17-4937-2020, 2020
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Major research initiatives have been undertaken within the Arctic Ocean, highlighting this area's global importance and vulnerability to climate change. In 2015, the international GEOTRACES program addressed this importance by devoting intense research activities to the Arctic Ocean. Among various tracers, we used radium and carbonate system data to elucidate the functioning and vulnerability of the hydrographic regime of the Canadian Arctic Archipelago, bridging the Pacific and Atlantic oceans.
Alexis Beaupré-Laperrière, Alfonso Mucci, and Helmuth Thomas
Biogeosciences, 17, 3923–3942, https://doi.org/10.5194/bg-17-3923-2020, https://doi.org/10.5194/bg-17-3923-2020, 2020
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Ocean acidification is the process by which the oceans are changing due to carbon dioxide emissions from human activities. Studying this process in the Arctic Ocean is essential as this ocean and its ecosystems are more vulnerable to the effects of acidification. Water chemistry measurements made in recent years show that waters in and around the Canadian Arctic Archipelago are considerably affected by this process and show dynamic conditions that might have an impact on local marine organisms.
Louise Delaigue, Helmuth Thomas, and Alfonso Mucci
Biogeosciences, 17, 547–566, https://doi.org/10.5194/bg-17-547-2020, https://doi.org/10.5194/bg-17-547-2020, 2020
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This paper reports on the first compilation and analysis of the surface water pCO2 distribution in the Saguenay Fjord, the southernmost subarctic fjord in the Northern Hemisphere, and thus fills a significant knowledge gap in current regional estimates of estuarine CO2 emissions.
Robin Bénard, Maurice Levasseur, Michael Scarratt, Sonia Michaud, Michel Starr, Alfonso Mucci, Gustavo Ferreyra, Michel Gosselin, Jean-Éric Tremblay, Martine Lizotte, and Gui-Peng Yang
Biogeosciences, 16, 1167–1185, https://doi.org/10.5194/bg-16-1167-2019, https://doi.org/10.5194/bg-16-1167-2019, 2019
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We present rare data on the combined effects of acidification and warming on dimethylsulfide (DMS) during a mesocosm experiment. Our results show a reduction of DMS under elevated pCO2, but warming the mesocosms by 5 °C translated into a positive offset in concentrations of DMS over the whole range of pCO2 tested. Our results suggest that warming could mitigate the expected reduction in DMS production due to OA, even increasing the net DMS production, with possible repercussions for the climate.
Robin Bénard, Maurice Levasseur, Michael Scarratt, Marie-Amélie Blais, Alfonso Mucci, Gustavo Ferreyra, Michel Starr, Michel Gosselin, Jean-Éric Tremblay, and Martine Lizotte
Biogeosciences, 15, 4883–4904, https://doi.org/10.5194/bg-15-4883-2018, https://doi.org/10.5194/bg-15-4883-2018, 2018
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We investigated the combined effect of ocean acidification and warming on the dynamics of the phytoplankton fall boom in the Lower St. Lawrence Estuary, Canada. Twelve 2600 L mesocosms were used to cover a wide range of pH and two temperatures. We found that warming, rather than acidification, is more likely to alter the autumnal bloom in this estuary in the decades to come by stimulating the development and senescence of diatoms, and promoting picocyanobacteria proliferation.
Jacoba Mol, Helmuth Thomas, Paul G. Myers, Xianmin Hu, and Alfonso Mucci
Biogeosciences, 15, 1011–1027, https://doi.org/10.5194/bg-15-1011-2018, https://doi.org/10.5194/bg-15-1011-2018, 2018
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In the fall of 2014, the upwelling of water from the deep Canada Basin brought water onto the shallower Mackenzie Shelf in the Beaufort Sea. This increased the concentration of CO2 in water on the shelf, which alters pH and changes the transfer of CO2 between the ocean and atmosphere. These findings were a combined result of water sampling for CO2 parameters and the use of a computer model that simulates water movement in the ocean.
Ashley Dinauer and Alfonso Mucci
Biogeosciences, 14, 3221–3237, https://doi.org/10.5194/bg-14-3221-2017, https://doi.org/10.5194/bg-14-3221-2017, 2017
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Because of its large physical dimensions and unimpeded connection to the Atlantic Ocean, the St. Lawrence Gulf and Estuary encompass both estuarine and marine environments. The underlying physical and biogeochemical processes are reflected in the spatial pattern of surface-water pCO2 (139–765 µatm). The shallow partially mixed upper estuary was a CO2 source due to microbial respiration, whereas the deep stratified lower estuary was generally a CO2 sink due to phytoplankton photosynthesis.
Rachel Hussherr, Maurice Levasseur, Martine Lizotte, Jean-Éric Tremblay, Jacoba Mol, Helmuth Thomas, Michel Gosselin, Michel Starr, Lisa A. Miller, Tereza Jarniková, Nina Schuback, and Alfonso Mucci
Biogeosciences, 14, 2407–2427, https://doi.org/10.5194/bg-14-2407-2017, https://doi.org/10.5194/bg-14-2407-2017, 2017
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This study assesses the impact of ocean acidification on phytoplankton and its synthesis of the climate-active gas dimethyl sulfide (DMS), as well as its modulation, by two contrasting light regimes in the Arctic. The light regimes tested had no significant impact on either the phytoplankton or DMS concentration, whereas both variables decreased linearly with the decrease in pH. Thus, a rapid decrease in surface water pH could alter the algal biomass and inhibit DMS production in the Arctic.
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Unexpected scarcity of ANME archaea in hydrocarbon seeps within Monterey Bay
Faithful transfer of radiolarian silicon isotope signatures from water column to sediments in the South China Sea
Organic Carbon, Mercury, and Sediment Characteristics along a land – shore transect in Arctic Alaska
Reviews and syntheses: Tufa microbialites on rocky coasts – towards an integrated terminology
Seafloor sediment characterization improves estimates of organic carbon standing stocks: an example from the Eastern Shore Islands, Nova Scotia, Canada
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Ancient clays support contemporary biogeochemical activity in the Critical Zone
The fate of fixed nitrogen in Santa Barbara Basin sediments during seasonal anoxia
Distinct oxygenation modes of the Gulf of Oman over the past 43 000 years – a multi-proxy approach
Potential impacts of cable bacteria activity on hard-shelled benthic foraminifera: implications for their interpretation as bioindicators or paleoproxies
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Carbon sources of benthic fauna in temperate lakes across multiple trophic states
Deep-water inflow event increases sedimentary phosphorus release on a multi-year scale
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Organic carbon characteristics in ice-rich permafrost in alas and Yedoma deposits, central Yakutia, Siberia
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Impact of small-scale disturbances on geochemical conditions, biogeochemical processes and element fluxes in surface sediments of the eastern Clarion–Clipperton Zone, Pacific Ocean
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Benthic alkalinity and dissolved inorganic carbon fluxes in the Rhône River prodelta generated by decoupled aerobic and anaerobic processes
Small-scale heterogeneity of trace metals including rare earth elements and yttrium in deep-sea sediments and porewaters of the Peru Basin, southeastern equatorial Pacific
Organic matter contents and degradation in a highly trawled area during fresh particle inputs (Gulf of Castellammare, southwestern Mediterranean)
Identifying the core bacterial microbiome of hydrocarbon degradation and a shift of dominant methanogenesis pathways in the oil and aqueous phases of petroleum reservoirs of different temperatures from China
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Ellen Schnabel, Aurèle Vuillemin, Cédric C. Laczny, Benoit J. Kunath, André R. Soares, Alexander J. Probst, Rolando Di Primio, Jens Kallmeyer, and the PROSPECTOMICS Consortium
Biogeosciences, 22, 767–784, https://doi.org/10.5194/bg-22-767-2025, https://doi.org/10.5194/bg-22-767-2025, 2025
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This study analysed marine sediment samples from areas with and without minimal hydrocarbon seepage from reservoirs underneath. Depth profiles of dissolved chemical components in the pore water and molecular biological data revealed differences in microbial community composition and activity. These results indicate that even minor hydrocarbon seepage affects sedimentary biogeochemical cycling in marine sediments, potentially providing a new tool for the detection of hydrocarbon reservoirs.
Robin Klomp, Olga M. Żygadłowska, Mike S. M. Jetten, Véronique E. Oldham, Niels A. G. M. van Helmond, Caroline P. Slomp, and Wytze K. Lenstra
Biogeosciences, 22, 751–765, https://doi.org/10.5194/bg-22-751-2025, https://doi.org/10.5194/bg-22-751-2025, 2025
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In marine sediments, dissolved Mn is present as either Mn(III) or Mn(II). We apply a reactive transport model to geochemical data for a seasonally anoxic and sulfidic coastal basin to determine the pathways of formation and removal of dissolved Mn(III) in the sediment. We demonstrate a critical role for reactions with Fe(II) and show evidence for substantial benthic release of dissolved Mn(III). Given the mobility of Mn(III), these findings have important implications for marine Mn cycling.
Amanda C. Semler and Anne E. Dekas
Biogeosciences, 22, 385–403, https://doi.org/10.5194/bg-22-385-2025, https://doi.org/10.5194/bg-22-385-2025, 2025
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Marine hydrocarbon seeps typically host subsurface microorganisms capable of degrading methane before it is emitted to the water column. Here we describe a seep in Monterey Bay which virtually lacks known methanotrophs and where biological consumption of methane at depth is undetected. Our findings suggest that some seeps are missing this critical biofilter and that seeps may be a more significant source of methane to the water column than previously realized.
Qiang Zhang, George Edward Alexander Swann, Vanessa Pashley, and Matthew S. A. Horstwood
EGUsphere, https://doi.org/10.5194/egusphere-2024-3686, https://doi.org/10.5194/egusphere-2024-3686, 2024
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We presents the first coupled record of radiolarian silicon isotopes (δ30Sirad) from paired water column and surface sediment samples in the South China Sea. No significant discrepancies in δ30Sirad values were observed between plankton and sediment samples, implying a minimal impact of dissolution on δ30Sirad during deposition of radiolarian shells. This demonstrates the faithful preservation of the δ30Sirad signature and its potential for studying past changes in the marine silicon cycle.
Frieda P. Giest, Maren Jenrich, Guido Grosse, Benjamin M. Jones, Kai Mangelsdorf, Torben Windirsch, and Jens Strauss
EGUsphere, https://doi.org/10.5194/egusphere-2024-3683, https://doi.org/10.5194/egusphere-2024-3683, 2024
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Climate warming causes permafrost to thaw, releasing greenhouse gases and affecting ecosystems. We studied sediments from Arctic coastal landscapes, including land, lakes, lagoons, and the ocean, finding that organic carbon storage and quality vary with landscape features and saltwater influence. Freshwater and land areas store more carbon, while saltwater reduces its quality. These findings improve predictions of Arctic responses to climate change and their impact on global carbon cycling.
Thomas W. Garner, J. Andrew G. Cooper, Alan M. Smith, Gavin M. Rishworth, and Matt Forbes
Biogeosciences, 21, 4785–4807, https://doi.org/10.5194/bg-21-4785-2024, https://doi.org/10.5194/bg-21-4785-2024, 2024
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There is a diverse and often conflicting suite of terminologies, classifications, and nomenclature applicable to the study of terrestrial carbonate deposits and microbialites (deposits that wholly or primarily accrete as a result of microbial activity). We review existing schemes, identify duplication and redundancy, and present a new integrated approach applicable to tufa microbialites on rock coasts.
Catherine Brenan, Markus Kienast, Vittorio Maselli, Christopher K. Algar, Benjamin Misiuk, and Craig J. Brown
Biogeosciences, 21, 4569–4586, https://doi.org/10.5194/bg-21-4569-2024, https://doi.org/10.5194/bg-21-4569-2024, 2024
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Quantifying how much organic carbon is stored in seafloor sediments is key to assessing how human activities can accelerate the process of carbon storage at the seabed, an important consideration for climate change. This study uses seafloor sediment maps to model organic carbon content. Carbon estimates were 12 times higher when assuming the absence of detailed sediment maps, demonstrating that high-resolution seafloor mapping is critically important for improved estimates of organic carbon.
Sophie Hage, Megan L. Baker, Nathalie Babonneau, Guillaume Soulet, Bernard Dennielou, Ricardo Silva Jacinto, Robert G. Hilton, Valier Galy, François Baudin, Christophe Rabouille, Clément Vic, Sefa Sahin, Sanem Açikalin, and Peter J. Talling
Biogeosciences, 21, 4251–4272, https://doi.org/10.5194/bg-21-4251-2024, https://doi.org/10.5194/bg-21-4251-2024, 2024
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The land-to-ocean flux of particulate organic carbon (POC) is difficult to measure, inhibiting accurate modeling of the global carbon cycle. Here, we quantify the POC flux between one of the largest rivers on Earth (Congo) and the ocean. POC in the form of vegetation and soil is transported by episodic submarine avalanches in a 1000 km long canyon at up to 5 km water depth. The POC flux induced by avalanches is at least 3 times greater than that induced by the background flow related to tides.
Vanessa M. Alfonso, Peter M. Groffman, Zhongqi Cheng, and David E. Seidemann
EGUsphere, https://doi.org/10.5194/egusphere-2024-1165, https://doi.org/10.5194/egusphere-2024-1165, 2024
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This study sought to explore organic-mineral interactions by investigating the functional performance of exposed clays through measurements of biogeochemical processes occurring on these materials. Results indicate that ancient clays are contributing to contemporary biogeochemical processes at ecosystem and landscape scales by supporting an active microbial community and a wide range of nitrogen cycle processes encompassing mineralization, immobilization, nitrification, and denitrification.
Xuefeng Peng, David J. Yousavich, Annie Bourbonnais, Frank Wenzhöfer, Felix Janssen, Tina Treude, and David L. Valentine
Biogeosciences, 21, 3041–3052, https://doi.org/10.5194/bg-21-3041-2024, https://doi.org/10.5194/bg-21-3041-2024, 2024
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Biologically available (fixed) nitrogen (N) is a limiting nutrient for life in the ocean. Under low-oxygen conditions, fixed N is either removed via denitrification or retained via dissimilatory nitrate reduction to ammonia (DNRA). Using in situ incubations in the Santa Barbara Basin, which undergoes seasonal anoxia, we found that benthic denitrification was the dominant nitrate reduction process, while nitrate availability and organic carbon content control the relative importance of DNRA.
Nicole Burdanowitz, Gerhard Schmiedl, Birgit Gaye, Philipp M. Munz, and Hartmut Schulz
Biogeosciences, 21, 1477–1499, https://doi.org/10.5194/bg-21-1477-2024, https://doi.org/10.5194/bg-21-1477-2024, 2024
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We analyse benthic foraminifera, nitrogen isotopes and lipids in a sediment core from the Gulf of Oman to investigate how the oxygen minimum zone (OMZ) and bottom water (BW) oxygenation have reacted to climatic changes since 43 ka. The OMZ and BW deoxygenation was strong during the Holocene, but the OMZ was well ventilated during the LGM period. We found an unstable mode of oscillating oxygenation states, from moderately oxygenated in cold stadials to deoxygenated in warm interstadials in MIS 3.
Maxime Daviray, Emmanuelle Geslin, Nils Risgaard-Petersen, Vincent V. Scholz, Marie Fouet, and Edouard Metzger
Biogeosciences, 21, 911–928, https://doi.org/10.5194/bg-21-911-2024, https://doi.org/10.5194/bg-21-911-2024, 2024
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Coastal marine sediments are subject to major acidification processes because of climate change and human activities, but these processes can also result from biotic activity. We studied the sediment acidifcation effect on benthic calcareous foraminifera in intertidal mudflats. The strong pH decrease in sediments probably caused by cable bacteria led to calcareous test dissolution of living and dead foraminifera, threatening the test preservation and their robustness as environmental proxies.
Sebastian J. E. Krause, Jiarui Liu, David J. Yousavich, DeMarcus Robinson, David W. Hoyt, Qianhui Qin, Frank Wenzhöfer, Felix Janssen, David L. Valentine, and Tina Treude
Biogeosciences, 20, 4377–4390, https://doi.org/10.5194/bg-20-4377-2023, https://doi.org/10.5194/bg-20-4377-2023, 2023
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Methane is a potent greenhouse gas, and hence it is important to understand its sources and sinks in the environment. Here we present new data from organic-rich surface sediments below an oxygen minimum zone off the coast of California (Santa Barbara Basin) demonstrating the simultaneous microbial production and consumption of methane, which appears to be an important process preventing the build-up of methane in these sediments and the emission into the water column and atmosphere.
Sinan Xu, Bo Liu, Sandra Arndt, Sabine Kasten, and Zijun Wu
Biogeosciences, 20, 2251–2263, https://doi.org/10.5194/bg-20-2251-2023, https://doi.org/10.5194/bg-20-2251-2023, 2023
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We use a reactive continuum model based on a lognormal distribution (l-RCM) to inversely determine model parameters μ and σ at 123 sites across the global ocean. Our results show organic matter (OM) reactivity is more than 3 orders of magnitude higher in shelf than in abyssal regions. In addition, OM reactivity is higher than predicted in some specific regions, yet the l-RCM can still capture OM reactivity features in these regions.
Christiane Schmidt, Emmanuelle Geslin, Joan M. Bernhard, Charlotte LeKieffre, Mette Marianne Svenning, Helene Roberge, Magali Schweizer, and Giuliana Panieri
Biogeosciences, 19, 3897–3909, https://doi.org/10.5194/bg-19-3897-2022, https://doi.org/10.5194/bg-19-3897-2022, 2022
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This study is the first to show non-selective deposit feeding in the foraminifera Nonionella labradorica and the possible uptake of methanotrophic bacteria. We carried out a feeding experiment with a marine methanotroph to examine the ultrastructure of the cell and degradation vacuoles using transmission electron microscopy (TEM). The results revealed three putative methanotrophs at the outside of the cell/test, which could be taken up via non-targeted grazing in seeps or our experiment.
James P. J. Ward, Katharine R. Hendry, Sandra Arndt, Johan C. Faust, Felipe S. Freitas, Sian F. Henley, Jeffrey W. Krause, Christian März, Allyson C. Tessin, and Ruth L. Airs
Biogeosciences, 19, 3445–3467, https://doi.org/10.5194/bg-19-3445-2022, https://doi.org/10.5194/bg-19-3445-2022, 2022
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The seafloor plays an important role in the cycling of silicon (Si), a key nutrient that promotes marine primary productivity. In our model study, we disentangle major controls on the seafloor Si cycle to better anticipate the impacts of continued warming and sea ice melt in the Barents Sea. We uncover a coupling of the iron redox and Si cycles, dissolution of lithogenic silicates, and authigenic clay formation, comprising a Si sink that could have implications for the Arctic Ocean Si budget.
Hanni Vigderovich, Werner Eckert, Michal Elul, Maxim Rubin-Blum, Marcus Elvert, and Orit Sivan
Biogeosciences, 19, 2313–2331, https://doi.org/10.5194/bg-19-2313-2022, https://doi.org/10.5194/bg-19-2313-2022, 2022
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Anaerobic oxidation of methane (AOM) is one of the major processes limiting the release of the greenhouse gas methane from natural environments. Here we show that significant AOM exists in the methane zone of lake sediments in natural conditions and even after long-term (ca. 18 months) anaerobic slurry incubations with two stages. Methanogens were most likely responsible for oxidizing the methane, and humic substances and iron oxides are likely electron acceptors to support this oxidation.
Florian Lauryssen, Philippe Crombé, Tom Maris, Elliot Van Maldegem, Marijn Van de Broek, Stijn Temmerman, and Erik Smolders
Biogeosciences, 19, 763–776, https://doi.org/10.5194/bg-19-763-2022, https://doi.org/10.5194/bg-19-763-2022, 2022
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Surface waters in lowland regions have a poor surface water quality, mainly due to excess nutrients like phosphate. Therefore, we wanted to know the phosphate levels without humans, also called the pre-industrial background. Phosphate binds strongly to sediment particles, suspended in the river water. In this research we used sediments deposited by a river as an archive for surface water phosphate back to 1800 CE. Pre-industrial phosphate levels were estimated at one-third of the modern levels.
Gerard J. M. Versteegh, Andrea Koschinsky, Thomas Kuhn, Inken Preuss, and Sabine Kasten
Biogeosciences, 18, 4965–4984, https://doi.org/10.5194/bg-18-4965-2021, https://doi.org/10.5194/bg-18-4965-2021, 2021
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Oxygen penetrates sediments not only from the ocean bottom waters but also from the basement. The impact of the latter is poorly understood. We show that this basement oxygen has a clear impact on the nitrogen cycle, the redox state, and the distribution of manganese, nickel cobalt and organic matter in the sediments. This is important for (1) global biogeochemical cycles, (2) understanding sedimentary life and (3) the interpretation of the sediment record to reconstruct the past.
Annika Fiskal, Eva Anthamatten, Longhui Deng, Xingguo Han, Lorenzo Lagostina, Anja Michel, Rong Zhu, Nathalie Dubois, Carsten J. Schubert, Stefano M. Bernasconi, and Mark A. Lever
Biogeosciences, 18, 4369–4388, https://doi.org/10.5194/bg-18-4369-2021, https://doi.org/10.5194/bg-18-4369-2021, 2021
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Microbially produced methane can serve as a carbon source for freshwater macrofauna most likely through grazing on methane-oxidizing bacteria. This study investigates the contributions of different carbon sources to macrofaunal biomass. Our data suggest that the average contribution of methane-derived carbon is similar between different fauna but overall remains low. This is further supported by the low abundance of methane-cycling microorganisms.
Astrid Hylén, Sebastiaan J. van de Velde, Mikhail Kononets, Mingyue Luo, Elin Almroth-Rosell, and Per O. J. Hall
Biogeosciences, 18, 2981–3004, https://doi.org/10.5194/bg-18-2981-2021, https://doi.org/10.5194/bg-18-2981-2021, 2021
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Sediments in oxygen-depleted ocean areas release high amounts of phosphorus, feeding algae that consume oxygen upon degradation, leading to further phosphorus release. Oxygenation is thought to trap phosphorus in the sediment and break this feedback. We studied the sediment phosphorus cycle in a previously anoxic area after an inflow of oxic water. Surprisingly, the sediment phosphorus release increased, showing that feedbacks between phosphorus release and oxygen depletion can be hard to break.
Sebastiaan J. van de Velde, Rebecca K. James, Ine Callebaut, Silvia Hidalgo-Martinez, and Filip J. R. Meysman
Biogeosciences, 18, 1451–1461, https://doi.org/10.5194/bg-18-1451-2021, https://doi.org/10.5194/bg-18-1451-2021, 2021
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Some 540 Myr ago, animal life evolved in the ocean. Previous research suggested that when these early animals started inhabiting the seafloor, they retained phosphorus in the seafloor, thereby limiting photosynthesis in the ocean. We studied salt marsh sediments with and without animals and found that their impact on phosphorus retention is limited, which implies that their impact on the global environment might have been less drastic than previously assumed.
Martijn Hermans, Nils Risgaard-Petersen, Filip J. R. Meysman, and Caroline P. Slomp
Biogeosciences, 17, 5919–5938, https://doi.org/10.5194/bg-17-5919-2020, https://doi.org/10.5194/bg-17-5919-2020, 2020
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This paper demonstrates that the recently discovered cable bacteria are capable of using a mineral, known as siderite, as a source for the formation of iron oxides. This work also demonstrates that the activity of cable bacteria can lead to a distinct subsurface layer in the sediment that can be used as a marker for their activity.
Torben Windirsch, Guido Grosse, Mathias Ulrich, Lutz Schirrmeister, Alexander N. Fedorov, Pavel Y. Konstantinov, Matthias Fuchs, Loeka L. Jongejans, Juliane Wolter, Thomas Opel, and Jens Strauss
Biogeosciences, 17, 3797–3814, https://doi.org/10.5194/bg-17-3797-2020, https://doi.org/10.5194/bg-17-3797-2020, 2020
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To extend the knowledge on circumpolar deep permafrost carbon storage, we examined two deep permafrost deposit types (Yedoma and alas) in central Yakutia. We found little but partially undecomposed organic carbon as a result of largely changing sedimentation processes. The carbon stock of the examined Yedoma deposits is about 50 % lower than the general Yedoma domain mean, implying a very hetererogeneous Yedoma composition, while the alas is approximately 80 % below the thermokarst deposit mean.
Anna Plass, Christian Schlosser, Stefan Sommer, Andrew W. Dale, Eric P. Achterberg, and Florian Scholz
Biogeosciences, 17, 3685–3704, https://doi.org/10.5194/bg-17-3685-2020, https://doi.org/10.5194/bg-17-3685-2020, 2020
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We compare the cycling of Fe and Cd in sulfidic sediments of the Peruvian oxygen minimum zone. Due to the contrasting solubility of their sulfide minerals, the sedimentary Fe release and Cd burial fluxes covary with spatial and temporal distributions of H2S. Depending on the solubility of their sulfide minerals, sedimentary trace metal fluxes will respond differently to ocean deoxygenation/expansion of H2S concentrations, which may change trace metal stoichiometry of upwelling water masses.
Biqing Zhu, Manuel Kübler, Melanie Ridoli, Daniel Breitenstein, and Martin H. Schroth
Biogeosciences, 17, 3613–3630, https://doi.org/10.5194/bg-17-3613-2020, https://doi.org/10.5194/bg-17-3613-2020, 2020
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We provide evidence that the greenhouse gas methane (CH4) is enclosed in calcareous glacier-forefield sediments across Switzerland. Geochemical analyses confirmed that this ancient CH4 has its origin in the calcareous parent bedrock. Our estimate of the total quantity of CH4 enclosed in sediments across Switzerland indicates a large CH4 mass (~105 t CH4). We produced evidence that CH4 is stable in its enclosed state, but additional experiments are needed to elucidate its long-term fate.
Matteo Puglini, Victor Brovkin, Pierre Regnier, and Sandra Arndt
Biogeosciences, 17, 3247–3275, https://doi.org/10.5194/bg-17-3247-2020, https://doi.org/10.5194/bg-17-3247-2020, 2020
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A reaction-transport model to assess the potential non-turbulent methane flux from the East Siberian Arctic sediments to water columns is applied here. We show that anaerobic oxidation of methane (AOM) is an efficient filter except for high values of sedimentation rate and advective flow, which enable considerable non-turbulent steady-state methane fluxes. Significant transient methane fluxes can also occur during the building-up phase of the AOM-performing biomass microbial community.
Kyle Delwiche, Junyao Gu, Harold Hemond, and Sarah P. Preheim
Biogeosciences, 17, 3135–3147, https://doi.org/10.5194/bg-17-3135-2020, https://doi.org/10.5194/bg-17-3135-2020, 2020
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In this study, we investigate whether bubbles transport sediments containing arsenic and cyanobacteria from the bottom to the top of a polluted lake. We measured arsenic and cyanobacteria from bubble traps in the lake and from an experimental bubble column in the laboratory. We found that bubble transport was not an important source of arsenic in the surface waters but that bubbles could transport enough cyanobacteria to the surface to exacerbate harmful algal blooms.
Nathaniel Kemnitz, William M. Berelson, Douglas E. Hammond, Laura Morine, Maria Figueroa, Timothy W. Lyons, Simon Scharf, Nick Rollins, Elizabeth Petsios, Sydnie Lemieux, and Tina Treude
Biogeosciences, 17, 2381–2396, https://doi.org/10.5194/bg-17-2381-2020, https://doi.org/10.5194/bg-17-2381-2020, 2020
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Our paper shows how sedimentation in a very low oxygen setting provides a unique record of environmental change. We look at the past 250 years through the filter of sediment accumulation via radioisotope dating and other physical and chemical analyses of these sediments. We conclude, remarkably, that there has been very little change in net sediment mass accumulation through the past 100–150 years, yet just prior to 1900 CE, sediments were accumulating at 50 %–70 % of today's rate.
Dario Fussmann, Avril Jean Elisabeth von Hoyningen-Huene, Andreas Reimer, Dominik Schneider, Hana Babková, Robert Peticzka, Andreas Maier, Gernot Arp, Rolf Daniel, and Patrick Meister
Biogeosciences, 17, 2085–2106, https://doi.org/10.5194/bg-17-2085-2020, https://doi.org/10.5194/bg-17-2085-2020, 2020
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Dolomite (CaMg(CO3)2) is supersaturated in many aquatic settings (e.g., seawater) on modern Earth but does not precipitate directly from the fluid, a fact known as the dolomite problem. The widely acknowledged concept of dolomite precipitation involves microbial extracellular polymeric substances (EPSs) and anoxic conditions as important drivers. In contrast, results from Lake Neusiedl support an alternative concept of Ca–Mg carbonate precipitation under aerobic and alkaline conditions.
Aurèle Vuillemin, André Friese, Richard Wirth, Jan A. Schuessler, Anja M. Schleicher, Helga Kemnitz, Andreas Lücke, Kohen W. Bauer, Sulung Nomosatryo, Friedhelm von Blanckenburg, Rachel Simister, Luis G. Ordoñez, Daniel Ariztegui, Cynthia Henny, James M. Russell, Satria Bijaksana, Hendrik Vogel, Sean A. Crowe, Jens Kallmeyer, and the Towuti Drilling Project
Science team
Biogeosciences, 17, 1955–1973, https://doi.org/10.5194/bg-17-1955-2020, https://doi.org/10.5194/bg-17-1955-2020, 2020
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Ferruginous lakes experience restricted primary production due to phosphorus trapping by ferric iron oxides under oxic conditions. We report the presence of large crystals of vivianite, a ferrous iron phosphate, in sediments from Lake Towuti, Indonesia. We address processes of P retention linked to diagenesis of iron phases. Vivianite crystals had light Fe2+ isotope signatures and contained mineral inclusions consistent with antecedent processes of microbial sulfate and iron reduction.
Sonja Geilert, Patricia Grasse, Kristin Doering, Klaus Wallmann, Claudia Ehlert, Florian Scholz, Martin Frank, Mark Schmidt, and Christian Hensen
Biogeosciences, 17, 1745–1763, https://doi.org/10.5194/bg-17-1745-2020, https://doi.org/10.5194/bg-17-1745-2020, 2020
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Marine silicate weathering is a key process of the marine silica cycle; however, its controlling processes are not well understood. In the Guaymas Basin, silicate weathering has been studied under markedly differing ambient conditions. Environmental settings like redox conditions or terrigenous input of reactive silicates appear to be major factors controlling marine silicate weathering. These factors need to be taken into account in future oceanic mass balances of Si and in modeling studies.
Jessica B. Volz, Laura Haffert, Matthias Haeckel, Andrea Koschinsky, and Sabine Kasten
Biogeosciences, 17, 1113–1131, https://doi.org/10.5194/bg-17-1113-2020, https://doi.org/10.5194/bg-17-1113-2020, 2020
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Potential future deep-sea mining of polymetallic nodules at the seafloor is expected to severely harm the marine environment. However, the consequences on deep-sea ecosystems are still poorly understood. This study on surface sediments from man-made disturbance tracks in the Pacific Ocean shows that due to the removal of the uppermost sediment layer and thereby the loss of organic matter, the geochemical system in the sediments is disturbed for millennia before reaching a new equilibrium.
Ralf Conrad, Melanie Klose, and Alex Enrich-Prast
Biogeosciences, 17, 1063–1069, https://doi.org/10.5194/bg-17-1063-2020, https://doi.org/10.5194/bg-17-1063-2020, 2020
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Lake sediments release the greenhouse gas CH4. Acetate is an important precursor. Although Amazonian lake sediments all contained acetate-consuming methanogens, measurement of the turnover of labeled acetate showed that some sediments converted acetate not to CH4 plus CO2, as expected, but only to CO2. Our results indicate the operation of acetate-oxidizing microorganisms couples the oxidation process to syntrophic methanogenic partners and/or to the reduction of organic compounds.
Jens Rassmann, Eryn M. Eitel, Bruno Lansard, Cécile Cathalot, Christophe Brandily, Martial Taillefert, and Christophe Rabouille
Biogeosciences, 17, 13–33, https://doi.org/10.5194/bg-17-13-2020, https://doi.org/10.5194/bg-17-13-2020, 2020
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In this paper, we use a large set of measurements made using in situ and lab techniques to elucidate the cause of dissolved inorganic carbon fluxes in sediments from the Rhône delta and its companion compound alkalinity, which carries the absorption capacity of coastal waters with respect to atmospheric CO2. We show that sediment processes (sulfate reduction, FeS precipitation and accumulation) are crucial in generating the alkalinity fluxes observed in this study by in situ incubation chambers.
Sophie A. L. Paul, Matthias Haeckel, Michael Bau, Rajina Bajracharya, and Andrea Koschinsky
Biogeosciences, 16, 4829–4849, https://doi.org/10.5194/bg-16-4829-2019, https://doi.org/10.5194/bg-16-4829-2019, 2019
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We studied the upper 10 m of deep-sea sediments, including pore water, in the Peru Basin to understand small-scale variability of trace metals. Our results show high spatial variability related to topographical variations, which in turn impact organic matter contents, degradation processes, and trace metal cycling. Another interesting finding was the influence of dissolving buried nodules on the surrounding sediment and trace metal cycling.
Sarah Paradis, Antonio Pusceddu, Pere Masqué, Pere Puig, Davide Moccia, Tommaso Russo, and Claudio Lo Iacono
Biogeosciences, 16, 4307–4320, https://doi.org/10.5194/bg-16-4307-2019, https://doi.org/10.5194/bg-16-4307-2019, 2019
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Chronic deep bottom trawling in the Gulf of Castellammare (SW Mediterranean) erodes large volumes of sediment, exposing over-century-old sediment depleted in organic matter. Nevertheless, the arrival of fresh and nutritious sediment recovers superficial organic matter in trawling grounds and leads to high turnover rates, partially and temporarily mitigating the impacts of bottom trawling. However, this deposition is ephemeral and it will be swiftly eroded by the passage of the next trawler.
Zhichao Zhou, Bo Liang, Li-Ying Wang, Jin-Feng Liu, Bo-Zhong Mu, Hojae Shim, and Ji-Dong Gu
Biogeosciences, 16, 4229–4241, https://doi.org/10.5194/bg-16-4229-2019, https://doi.org/10.5194/bg-16-4229-2019, 2019
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This study shows a core bacterial microbiome with a small proportion of shared operational taxonomic units of common sequences among all oil reservoirs. Dominant methanogenesis shifts from the hydrogenotrophic pathway in water phase to the acetoclastic pathway in the oil phase at high temperatures, but the opposite is true at low temperatures. There are also major functional metabolism differences between the two phases for amino acids, hydrocarbons, and carbohydrates.
Annika Fiskal, Longhui Deng, Anja Michel, Philip Eickenbusch, Xingguo Han, Lorenzo Lagostina, Rong Zhu, Michael Sander, Martin H. Schroth, Stefano M. Bernasconi, Nathalie Dubois, and Mark A. Lever
Biogeosciences, 16, 3725–3746, https://doi.org/10.5194/bg-16-3725-2019, https://doi.org/10.5194/bg-16-3725-2019, 2019
Hanni Vigderovich, Lewen Liang, Barak Herut, Fengping Wang, Eyal Wurgaft, Maxim Rubin-Blum, and Orit Sivan
Biogeosciences, 16, 3165–3181, https://doi.org/10.5194/bg-16-3165-2019, https://doi.org/10.5194/bg-16-3165-2019, 2019
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Microbial iron reduction participates in important biogeochemical cycles. In the last decade iron reduction has been observed in many aquatic sediments below its classical zone, in the methane production zone, suggesting a link between the two cycles. Here we present evidence for microbial iron reduction in the methanogenic depth of the oligotrophic SE Mediterranean continental shelf using mainly geochemical and microbial sedimentary profiles and suggest possible mechanisms for this process.
Haoyi Yao, Wei-Li Hong, Giuliana Panieri, Simone Sauer, Marta E. Torres, Moritz F. Lehmann, Friederike Gründger, and Helge Niemann
Biogeosciences, 16, 2221–2232, https://doi.org/10.5194/bg-16-2221-2019, https://doi.org/10.5194/bg-16-2221-2019, 2019
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How methane is transported in the sediment is important for the microbial community living on methane. Here we report an observation of a mini-fracture that facilitates the advective gas transport of methane in the sediment, compared to the diffusive fluid transport without a fracture. We found contrasting bio-geochemical signals in these different transport modes. This finding can help to fill the gap in the fracture network system in modulating methane dynamics in surface sediments.
Laura A. Casella, Sixin He, Erika Griesshaber, Lourdes Fernández-Díaz, Martina Greiner, Elizabeth M. Harper, Daniel J. Jackson, Andreas Ziegler, Vasileios Mavromatis, Martin Dietzel, Anton Eisenhauer, Sabino Veintemillas-Verdaguer, Uwe Brand, and Wolfgang W. Schmahl
Biogeosciences, 15, 7451–7484, https://doi.org/10.5194/bg-15-7451-2018, https://doi.org/10.5194/bg-15-7451-2018, 2018
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Biogenic carbonates record past environmental conditions. Fossil shell chemistry and microstructure change as metastable biogenic carbonates are replaced by inorganic calcite. Simulated diagenetic alteration at 175 °C of different shell microstructures showed that (nacreous) shell aragonite and calcite were partially replaced by coarse inorganic calcite crystals due to dissolution–reprecipitation reactions. EBSD maps allowed for qualitative assessment of the degree of diagenetic overprint.
Wytze K. Lenstra, Matthias Egger, Niels A. G. M. van Helmond, Emma Kritzberg, Daniel J. Conley, and Caroline P. Slomp
Biogeosciences, 15, 6979–6996, https://doi.org/10.5194/bg-15-6979-2018, https://doi.org/10.5194/bg-15-6979-2018, 2018
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We show that burial rates of phosphorus (P) in an estuary in the northern Baltic Sea are very high. We demonstrate that at high sedimentation rates, P retention in the sediment is related to the formation of vivianite. With a reactive transport model, we assess the sensitivity of sedimentary vivianite formation. We suggest that enrichments of iron and P in the sediment are linked to periods of enhanced riverine input of Fe, which subsequently strongly enhances P burial in coastal sediments.
Jiarui Liu, Gareth Izon, Jiasheng Wang, Gilad Antler, Zhou Wang, Jie Zhao, and Matthias Egger
Biogeosciences, 15, 6329–6348, https://doi.org/10.5194/bg-15-6329-2018, https://doi.org/10.5194/bg-15-6329-2018, 2018
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Our work provides new insights into the biogeochemical cycling of iron, methane and phosphorus. We found that vivianite, an iron-phosphate mineral, is pervasive in methane-rich sediments, suggesting that iron reduction at depth is coupled to phosphorus and methane cycling on a much greater spatial scale than previously assumed. Acting as an important burial mechanism for iron and phosphorus, vivianite authigenesis may be an under-considered process in both modern and ancient settings alike.
Marc A. Besseling, Ellen C. Hopmans, R. Christine Boschman, Jaap S. Sinninghe Damsté, and Laura Villanueva
Biogeosciences, 15, 4047–4064, https://doi.org/10.5194/bg-15-4047-2018, https://doi.org/10.5194/bg-15-4047-2018, 2018
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Benthic archaea comprise a significant part of the total prokaryotic biomass in marine sediments. Here, we compared the archaeal diversity and intact polar lipid (IPL) composition in both surface and subsurface sediments with different oxygen regimes in the Arabian Sea oxygen minimum zone. The oxygenated sediments were dominated by Thaumarchaeota and IPL-GDGT-0. The anoxic sediment contained highly diverse archaeal communities and high relative abundances of IPL-GDGT-1 to -4.
Georgina Robinson, Thomas MacTavish, Candida Savage, Gary S. Caldwell, Clifford L. W. Jones, Trevor Probyn, Bradley D. Eyre, and Selina M. Stead
Biogeosciences, 15, 1863–1878, https://doi.org/10.5194/bg-15-1863-2018, https://doi.org/10.5194/bg-15-1863-2018, 2018
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This study examined the effect of adding carbon to a sediment-based effluent treatment system to treat nitrogen-rich aquaculture waste. The research was conducted in incubation chambers to measure the exchange of gases and nutrients across the sediment–water interface and examine changes in the sediment microbial community. Adding carbon increased the amount of nitrogen retained in the treatment system, thereby reducing the levels of nitrogen needing to be discharged to the environment.
Daniele Brigolin, Christophe Rabouille, Bruno Bombled, Silvia Colla, Salvatrice Vizzini, Roberto Pastres, and Fabio Pranovi
Biogeosciences, 15, 1347–1366, https://doi.org/10.5194/bg-15-1347-2018, https://doi.org/10.5194/bg-15-1347-2018, 2018
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We present the result of a study carried out in the north-western Adriatic Sea by combining two different types of models with field sampling. A mussel farm was taken as a local source of perturbation to the natural flux of particulate organic carbon to the sediment. Differences in fluxes were primarily associated with mussel physiological conditions. Although restricted, these changes in particulate organic carbon fluxes induced visible effects on sediment biogeochemistry.
Volker Brüchert, Lisa Bröder, Joanna E. Sawicka, Tommaso Tesi, Samantha P. Joye, Xiaole Sun, Igor P. Semiletov, and Vladimir A. Samarkin
Biogeosciences, 15, 471–490, https://doi.org/10.5194/bg-15-471-2018, https://doi.org/10.5194/bg-15-471-2018, 2018
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We determined the aerobic and anaerobic degradation rates of land- and marine-derived organic material in East Siberian shelf sediment. Marine plankton-derived organic carbon was the main source for the oxic dissolved carbon dioxide production, whereas terrestrial organic material significantly contributed to the production of carbon dioxide under anoxic conditions. Our direct degradation rate measurements provide new constraints for the present-day Arctic marine carbon budget.
Jack J. Middelburg
Biogeosciences, 15, 413–427, https://doi.org/10.5194/bg-15-413-2018, https://doi.org/10.5194/bg-15-413-2018, 2018
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Organic carbon processing at the seafloor is studied by geologists to better understand the sedimentary record, by biogeochemists to quantify burial and respiration, by organic geochemists to elucidate compositional changes, and by ecologists to follow carbon transfers within food webs. These disciplinary approaches have their strengths and weaknesses. This award talk provides a synthesis, highlights the role of animals in sediment carbon processing and presents some new concepts.
Craig Smeaton, William E. N. Austin, Althea L. Davies, Agnes Baltzer, John A. Howe, and John M. Baxter
Biogeosciences, 14, 5663–5674, https://doi.org/10.5194/bg-14-5663-2017, https://doi.org/10.5194/bg-14-5663-2017, 2017
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Fjord sediments are recognised as hotspots for the burial and long-term storage of carbon. In this study, we use the Scottish fjords as a natural laboratory. Using geophysical and geochemical analysis in combination with upscaling techniques, we have generated the first full national sedimentary C inventory for a fjordic system. The results indicate that the Scottish fjords on a like-for-like basis are more effective as C stores than their terrestrial counterparts, including Scottish peatlands.
Cited articles
Anschutz, P. and Chaillou, G.: Deposition and fate of reactive Fe, Mn, P,
and C in suspended particulate matter in the Bay of Biscay, Cont. Shelf Res., 29, 1038–1043, 2009.
Anschutz, P. and Deborde, J.: Spectrophotometric determination of phosphate
in matrices from sequential leaching of sediments, Limnol. Oceanogr.-Meth.,
14, 245–256, 2016.
Anschutz, P., Zhong, S., Sundby, B., Mucci, A., and Gobeil, C.: Burial
efficiency of phosphorus and the geochemistry of iron in continental margin
sediments, Limnol Oceanogr., 43, 53–64, 1998.
Archer, D.: Methane hydrate stability and anthropogenic climate change, Biogeosciences, 4, 521–544, https://doi.org/10.5194/bg-4-521-2007, 2007.
Archer, D., Winguth, A., Lea, D., and Mahowald, N.: What caused the
glacial/interglacial atmospheric pCO2 cycles?, Rev. Geophys., 38,
159–189, 2000.
Barnola, J. M., Raynaud, D., Korotkevich, Y. S., and Lorius, C.:
Vostok ice core provides 160 000-year record of atmospheric CO2,
Nature, 329, 408–414, 1987.
Basak, C., Fröllje, H., Lamy, F., Gersonde, R., Benz, V., Anderson, R. F.,
Molina-Kercher, M., and Pahnke, K.: Breakup of last glacial deep
stratification in the South Pacific, Science, 359, 900–904, 2018.
Berner, R. A.: Early Diagenesis: A Theoretical Approach, Princeton
University Press, ISBN 9780691082608, 1980.
Berner, R. A., Ruttenberg, K. C., Ingall, E. D., and Rao, J. L.: The nature
of phosphorus burial in modern marine sediments, in: Interactions of C, N, P
and S biogeochemical cycles and global change, edited by: Wollast, R.,
Mackenzie, F. T., and Chou, L., Springer, Berlin, Heidelberg, 365–378, ISBN 978-3-642-76066-2, 1993.
Boetius, A., Ravenschlag, K., Schubert, C. J., Rickert, D., Widdel, F.,
Gieseke, A., Amann, R., Jørgensen, B. B., Witte, U., and Pfannkuche, O.:
A marine microbial consortium apparently mediating anaerobic oxidation of
methane, Nature, 407, 623–626, 2000.
Bohrmann, G. and Torres, M. E.: Gas hydrates in marine sediments, in: Marine
Geochemistry, edited by: Schulz, H. D. and Zabel, M., Springer, Berlin,
Heidelberg, 481–512, ISBN 978-3-540-32143-9, 2006.
Borowski, W. S., Paull, C. K., and Ussler, W.: Global and local variations
of interstitial sulfate gradients in deep-water, continental margin
sediments: Sensitivity to underlying methane and gas hydrates, Mar. Geol.,
159, 131–154, 1999.
Boudreau, B. P.: The diffusive tortuosity of fine-grained unlithified
sediments, Geochim. Cosmochim. Ac., 60, 3139–3142, 1996.
Boyle, E. A.: Paired carbon isotope and cadmium data from benthic
foraminifera: Implications for changes in oceanic phosphorus, oceanic
circulation, and atmospheric carbon dioxide, Geochim. Cosmochim. Ac., 50,
265–276, 1986.
Bratton, J. F.: Clathrate eustacy: Methane hydrate melting as a mechanism
for geologically rapid sea-level fall, Geology, 27, 915–918, 1999.
Broecker, W. S: Glacial to interglacial changes in ocean chemistry, Prog. Oceanogr., 11, 151–197, 1982a.
Broecker, W. S.: Ocean chemistry during glacial time, Geochim. Cosmochim. Ac., 46, 1689–1705, 1982b.
Broecker, W. S.: Glacial Cycles, Geochem. Perspect., 7, 167–181, 2018.
Burdige, D. J. and Komada, T.: Anaerobic oxidation of methane and the
stoichiometry of remineralization processes in continental margin sediments,
Limnol. Oceanogr., 56, 1781–1796, 2011.
Burdige, D. J. and Komada, T.: Using ammonium pore water profiles to assess
stoichiometry of deep remineralization processes in methanogenic continental
margin sediments, Geochem. Geophy. Geosy., 14, 1626–1643,
2013.
Burwicz, E. B., Rüpke, L. H., and Wallmann, K.:
Estimation of the global amount of submarine gas hydrates formed via
microbial methane formation based on numerical reaction-transport modeling
and a novel parameterization of Holocene sedimentation, Geochim. Cosmochim.
Ac., 75, 4562–4576, 2011.
Canfield, D. E.: Reactive iron in marine sediments, Geochim. Cosmochim. Ac., 53, 619–632, 1989.
Canfield, D. E., Thamdrup, B., and Hansen, J. W.: The anaerobic degradation
of organic matter in Danish coastal sediments: iron reduction, manganese
reduction, and sulfate reduction, Geochim. Cosmochim. Ac., 57,
3867–3883, 1993.
Cartapanis, O., Bianchi, D., Jaccard, S. L., and Galbraith, E. D.: Global
pulses of organic carbon burial in deep-sea sediments during glacial maxima,
Nat. Comm., 7, 1–7, 2016.
Charbonnier, C., Mouret, A., Howa, H., Schmidt, S., Gillet, H., and Anschutz, P.: Quantification of diagenetic transformation of continental margin
sediments at the Holocene time scale, Cont. Shelf Res., 180, 63–74, 2019.
Colman, A. S. and Holland, H. D.: The global diagenetic flux of phosphorus
from marine sediments to the oceans: redox sensitivity and the control of
atmospheric oxygen levels, SEPM Spec. P., 66, 53–75, https://doi.org/10.2110/pec.00.66.0053, 2000.
Contreras, S., Meister, P., Liu, B., Prieto-Mollar, X., Hinrichs, K. U.,
Khalili, A., Felderman, T. G., Kuypers, M. M. M., and Jørgensen, B. B.:
Cyclic 100-ka (glacial-interglacial) migration of subseafloor redox zonation
on the Peruvian shelf, P. Natl. Acad. Sci. USA, 110, 18098–18103, 2013.
Costello, M. J., Smith, M., and Fraczek, W.: Correction to Surface area and
the seabed area, volume, depth, slope, and topographic variation for the
world's seas, oceans, and countries, Environ. Sci. Tech., 49, 7071–7072,
2015.
Delaney, M.: Phosphorus accumulation in marine sediments and the oceanic
phosphorus cycle, Global Biogeochem. Cy., 12, 563–572, 1998.
Dillon, W. P., and Paull, C. K.: Marine gas-hydrate II: Geophysical
evidence, in: Natural Gas Hydrates., Properties, Occurrence and Recovery,
edited by: Cox, J. L., Butterworth, Boston, Mass., 73–90, ISBN 978-0250406319, 1983.
Egger, M., Jilbert, T., Behrends, T., Rivard, C., and Slomp, C. P.: Vivianite
is a major sink for phosphorus in methanogenic coastal surface sediments,
Geochim. Cosmochim. Ac., 169, 217–235, 2015.
Egger, M., Kraal, P., Jilbert, T., Sulu-Gambari, F., Sapart, C. J., Röckmann, T., and Slomp, C. P.: Anaerobic oxidation of methane alters sediment records of sulfur, iron and phosphorus in the Black Sea, Biogeosciences, 13, 5333–5355, https://doi.org/10.5194/bg-13-5333-2016, 2016.
Egger, M., Hagens, M., Sapart, C. J., Dijkstra, N., van Helmond, N. A. G. M.,
Mogollón, J. M., Risgaard-Peterson, N., van der Veen, C., Kasten, S.,
Riedenger, N., Böttcher, M. E., Röchmann, T., Jørgensen, B. B.,
and Slomp, C. P.: Iron oxide reduction in methane-rich deep Baltic Sea
sediments, Geochim.. Cosmochim. Ac., 207, 256–276, 2017.
Egger, M., Riedinger, N., Mogollón, J. M., and Jørgensen, B. B.:
Global diffusive fluxes of methane in marine sediments, Nat. Geosci., 11,
421–425, 2018.
Falkowski, P. G.: Evolution of the nitrogen cycle and its influence on the
biological sequestration of CO2 in the ocean, Nature, 387,
272–275, 1997.
Filippelli, G. M.: Controls on phosphorus concentration and accumulation in
oceanic sediments, Mar. Geol., 139, 231–240, 1997.
Filippelli, G. M.: The global phosphorus cycle: past, present, and future,
Elements, 4, 89–95, 2008.
Filippelli, G. M., Latimer, J. C., Murray, R. W., and Flores, J. A.:
Productivity records from the Southern Ocean and the equatorial Pacific
Ocean: Testing the Glacial Shelf-Nutrient Hypothesis, Deep-Sea Res. Pt. II,
54, 2443–2452, 2007.
Fischer, D., Mogollón, J. M., Strasser, M., Pape, T., Bohrmann, G.,
Fekete, N., Spiess, V., and Kasten, S.: Subduction zone earthquake as
potential trigger of submarine hydrocarbon seepage, Nature Geosci., 6,
647–651, 2013.
Foster, G. L. and Rohling, E. J.: Relationship between sea-level and climate
forcing by CO2 on geological timescales, P. Natl. Acad. Sci. USA,
110, 1209–1214, 2013.
Froelich, P. N.: Kinetic control of dissolved phosphate in natural rivers
and estuaries: A primer on the phosphate buffer mechanism, Limnol.
Oceanogr., 33, 649–668, 1988.
Galbraith, E. D, Sigman, D., Pedersen, T., and Robinson, R. S.: Nitrogen in past marine environments, in: Nitrogen in the Marine Environment, edited
by: Capone, D., Bronk, M., Mulholland, M., and Carpenter, D., 2nd edn.,
Elsevier, 1497–1535, https://doi.org/10.1016/B978-0-12-372522-6.00034-7, 2008.
Ganeshram, R. S., Pedersen, T. F., Calvert, S. E., and Murray, J. W.: Large
changes in oceanic nutrient inventories from glacial to interglacial
periods, Nature, 376, 755–758, 1995.
Ganeshram, R. S., Pedersen, T. F., Calvert, S., and François, R.:
Reduced nitrogen fixation in the glacial ocean inferred from changes in
marine nitrogen and phosphorus inventories, Nature, 415, 156–159,
2002.
Geprägs, P., Torres, M. A., Mau, S., Kasten, S., Römer, M., and
Bohrmann, G.: Carbon cycling fed by methane seepage at the shallow
Cumberland Bay, South Georgia, sub-Antarctic, Geochem. Geophy. Geosy.,
17, 1401–1418, 2016.
Gorman, A. R., Holbrook, W. S., Hornbach, M. J., Hackwith, K. L.,
Lizarralde, D., and Pecher, I.: Migration of methane gas through the hydrate
stability zone in a low-flux hydrate province, Geology, 30, 327–330,
2002.
Hain, M. P., Sigman, D. M., and Haug, G. H.: The Biological Pump in the
Past. Treatise on Geochemistry (2nd edn.), The Oceans and Marine
Geochemistry, 8, 485–517, 2014.
Henkel, S., Strasser, M., Schwenk, T., Hanebuth, T. J. J., Hüsener, J.,
Arnold, G. L., Winkelmann, D., Formolo, M., Tomasini, J., Krastel, S., and
Kasten, S.: An interdisciplinary investigation of a recent submarine mass
transport deposit at the continental margin off Uruguay, Geochem. Geophy.
Geosy., 12, 1–19, 2011.
Henkel, S., Mongollòn, J. M., Nöthen, K., Franke, C., Bogus, K.,
Robin, E., Bahr, A., Blumenberg, M., Pape, T., Siefert, R., März, C., de
Lange, G. J., and Kasten, S.: Diagenetic barium cycling in Black Sea
sediments – A case study for anoxic marine environments, Geochim. Cosmochim. Ac., 88, 88–105, 2012.
Hensen, C., Landenberger, H., Zabel, M., and Schulz, H. D.: Quantification of
diffusive benthic fluxes of nitrate, phosphate, and silicate in the southern
Atlantic Ocean, Global Biogeochem. Cy., 12, 193–210, 1998.
Hsu, T. W., Jiang, W. T., and Wang, Y.: Authigenesis of vivianite as
influenced by methane-induced sulfidization in cold-seep sediments off
southwestern Taiwan, J. Asian Earth Sci., 89, 88–97, 2014.
Hyacinthe, C. and Van Cappellen, P.: An authigenic iron phosphate phase in
estuarine sediments: composition, formation and chemical reactivity, Mar.
Chem., 91, 227–251, 2004.
Jørgensen, B. B. and Kasten, S.: Sulfur cycling and methane oxidation,
in: Marine Geochemistry, edited by: Schulz, H. D. and Zabel, M., Springer, Berlin, Heidelberg, 271–302, ISBN 978-3-540-32143-9, 2006.
Kennett, J. P., Cannariato, K. G., Hendy, I. L., and Behl, R. J.: Methane
hydrates in Quaternary climate change: The clathrate gun hypothesis,
American Geophysical Union, Washington, DC, ISBN 0-87590-296-0, 2003.
Kohfeld, K. E., Le Quéré, C., Harrison, S. P., and Anderson, R. F.:
Role of marine biology in glacial-interglacial CO2 cycles, Science,
308, 74–78, 2005.
Kölling, M, Bouimetarhan, I., Bowles, M. W., Felis, T, Goldhammer, T,
Hinrichs, K.-U., Schulz, M., and Zabel, M: Consistent CO2 release by
pyrite oxidation on continental shelves prior to glacial terminations,
Nat. Geosci., 12, 929–934, 2019.
Komada, T., Burdige, D. J., Li, H. L., Magen, C., Chanton, J. P., and Cada,
A. K.: Organic matter cycling across the sulfate-methane transition zone of
the Santa Barbara Basin, California Borderland, Geochim. Cosmochim. Ac.,
176, 259–278, 2016.
Kostka, J. E. and Luther III, G. W.: Partitioning and speciation of solid
phase iron in saltmarsh sediments, Geochim. Cosmochim. Ac., 58,
1701–1710, 1994.
Krom, M. D. and Berner, R. A.: The diffusion coefficients of sulfate,
ammonium, and phosphate ions in anoxic marine sediments, Limnol. Oceanogr.,
25, 327–337, 1980.
Krom, M. D. and Berner, R. A.: The diagenesis of phosphorus in a nearshore
marine sediment, Geochim. Cosmochim, Ac., 45, 207–216, 1981.
Kvenvolden, K. A.: Gas hydrates – Geological perspective and global change,
Rev. Geophys., 31, 173–187, 1993.
Lambeck, K., Rouby, H., Purcell, A., Sun, Y., and Sambridge, M.: Sea-level
and global ice volumes from the Last Glacial Maximum to the Holocene, P.
Natl. Acad. Sci. USA, 111, 15296–15303, 2014.
Lenton, T. M. and Klausmeier, C. A.: Biotic stoichiometric controls on the deep ocean N:P ratio, Biogeosciences, 4, 353–367, https://doi.org/10.5194/bg-4-353-2007, 2007.
Lenton, T. M. and Watson, A. J.: Redfield revisited: 1. Regulation of
nitrate, phosphate, and oxygen in the ocean, Global Biogeochem. Cy., 14,
225–248, 2000.
Lijklema, L.: The role of iron in the exchange of phosphate between water
and sediments, in: Interactions Between Sediments and Fresh Water, edited
by: Golterman, H. L., Dr. W. Junk Publishers, The Hague, 313–317, ISBN 9789022006320, 1977.
Liu, J., Izon, G., Wang, J., Antler, G., Wang, Z., Zhao, J., and Egger, M.: Vivianite formation in methane-rich deep-sea sediments from the South China Sea, Biogeosciences, 15, 6329–6348, https://doi.org/10.5194/bg-15-6329-2018, 2018.
März, C., Hoffmann, J., Bleil, U., de Lange, G., and Kasten, S.:
Diagenetic changes of magnetic and geochemical signals by anaerobic methane
oxidation in sediments of the Zambezi deep-sea fan (SW Indian Ocean), Mar.
Geol., 255, 118–130, 2008.
März, C., Riedinger, N., Sena, C., and Kasten, S.: Phosphorus dynamics
around the sulphate-methane transition in continental margin sediments:
Authigenic apatite and Fe(II) phosphates, Mar. Geol., 404, 84–96, 2018.
Meister, P., McKenzie, J. A., Vasconcelos, C., Bernasconi, S., Frank, M.,
Gutjahr, M., and Schrag, D. P.: Dolomite formation in the dynamic deep
biosphere: results from the Peru Margin, Sedimentology, 54, 1007–1032,
2007.
Meister, P., Bernasconi, S. M., Vasconcelos, C., and McKenzie, J. A.:
Sea-level changes control diagenetic dolomite formation in hemipelagic
sediments of the Peru Margin, Mar. Geol., 252, 166–173, 2008.
Meybeck, M.: Carbon, nitrogen, and phosphorus transport by world rivers, Am. J. Sci., 282, 401–450, 1982.
Millero, F. J., Huang, F., Zhu X., and Zhang, J.-Z.: Adsorption and
desorption of phosphate on calcite and aragonite in seawater, Aquat.
Geochem., 7, 33–56, 2001.
Nauhaus, K., Boetius, A., Krüger, M., and Widdel, F.: In vitro
demonstration of anaerobic oxidation of methane coupled to sulphate
reduction in sediment from a marine gas hydrate area, Environ. Microbiol.,
4, 296–305, 2002.
Niewöhner, C., Hensen, C., Kasten, S., Zabel, M., and Schulz, H. D.:
Deep sulfate reduction completely mediated by anaerobic methane oxidation in
sediments of the upwelling area off Namibia, Geochim. Cosmochim. Ac., 62,
455–464, 1998.
Palastanga, V., Slomp, C. P., and Heinze, C.: Glacial-interglacial variability in ocean oxygen and phosphorus in a global biogeochemical model, Biogeosciences, 10, 945–958, https://doi.org/10.5194/bg-10-945-2013, 2013.
Paull, C. K., Ussler, W., and Dillon, W. P.: Is the extent of glaciation
limited by marine gas hydrates?, Geophys. Res. Lett., 18, 432–434, 1991.
Peacock, S., Lane, E., and Restrepo, J. M.: A possible sequence of events
for the generalized glacial-interglacial cycle, Global Biogeochem. Cy., 20,
GB2010, doi.org/10.1029/2005GB002448, 2006.
Petit, J. R., Jouzel, J., Raynaud, D., Barkov, N. I., Barnola, J. M.,
Basile, I., Bender, M., Chappellaz, J., Davis, M., Delaygue, G., Delmotte,
M., Kotlyakov, V. M., Legrand, M., Lipenkov, V. Y., Lorius, C., Pépin,
L., Ritz, C., Saltzman, E., and Stievenard, M.: Climate and atmospheric
history of the past 420 000 years from the Vostok ice core, Antarctica,
Nature, 399, 429–436, 1999.
Poulton, S. W. and Canfield, D. E.: Development of a sequential extraction
procedure for iron: implications for iron partitioning in continentally
derived particulates, Chem. Geol., 214, 209–221, 2005.
Riedinger, N., Formolo, M. J., Lyons, T. W., Henkel, S., Beck, A., and Kasten,
S.: An inorganic geochemical argument for coupled anaerobic oxidation of
methane and iron reduction in marine sediments, Geobiology, 12, 172–181,
2014.
Roberts, A. P.: Magnetic mineral diagenesis, Earth-Science Rev., 151, 1–47, 2015.
Rothe, M., Kleeberg, A., and Hupfer, M.: The occurrence, identification and
environmental relevance of vivianite in waterlogged soils and aquatic
sediments, Earth-Sci. Rev., 158, 51–64, 2016.
Ruppel, C. D. and Kessler, J. D.: The interaction of climate change and
methane hydrates, Rev. Geophys., 55, 126–168, 2017.
Ruttenberg, K. C.: The global phosphorus cycle, in: Treatise on Geochemistry, edited by: Schleisinger, W. H., Elsevier, 585–643, ISBN 0-08-044343-5, 2003.
Ruttenberg, K. C.: The global phosphorus cycle, in: Treatise on
Geochemistry, 2nd edn., edited by: Karl, D. M. and Schlesinger, W. H., Elsevier
Science, 499–558, https://doi.org/10.1016/B978-0-08-095975-7.00813-5, 2014.
Sarmiento, J. J. and Gruber, N.: Ocean Biogeochemical Dynamics, Princeton University Press, Princeton, ISBN 9780691017075, 2006.
Schulz, H. D. and Zabel, M.: Marine Geochemistry, 2nd edn., Springer-Verlag, Berlin, Heidelberg, ISBN 978-3-540-32143-9, 2006.
Siddall, M., Rohling, E. J., Almogi-Labin, A., Hemleben, C., Meischner, D.,
Schmelzer, I., and Smeed, D. A.: Sea-level fluctuations during the last
glacial cycle, Nature, 423, 853–858, 2003.
Sigman, D. M. and Boyle, E. A.: Glacial/interglacial variations in
atmospheric carbon dioxide. Nature, 407, 859–869, 2000.
Sigman, D. M., Hain, M. P., and Haug, G. H.: The polar ocean and glacial cycles
in atmospheric CO2 concentration, Nature, 466, 47–55, 2010.
Slomp, C. P., Epping, E. H. G., Helder, W., and Van Raaphorst, W.: A key role
for iron-bound phosphorus in authigenic apatite formation in North Atlantic
continental platform sediments, J. Mar. Res., 54, 1179–1205, 1996.
Slomp, C. P., Mort, H. P., Jilbert, T., Reed, D. C., Gustafsson, B. G., and
Wolthers, M.: Coupled dynamics of iron and phosphorus in sediments of an
oligotrophic coastal basin and the impact of anaerobic oxidation of methane,
PloS ONE, 8, e62386, https://doi.org/10.1371/journal.pone.0062386, 2013
Smith, S. V.: Phosphorus versus nitrogen limitation in the marine
environment, Limnol. Oceanogr., 29, 1149–1160, 1984.
Sundby, B., Gobeil, C., Silverberg, N., and Mucci A.: The phosphorus cycle in
coastal marine sediments, Limnol. Oceanogr., 37, 1129–1145, 1992.
Sundby, B., Lecroart, P., Anschutz, P., Katsev, S., and Mucci, A.: When deep
diagenesis in Arctic Ocean sediments compromises manganese-based
geochronology, Mar. Geol., 366, 62–68, 2015.
Tsandev, I., Slomp, C. P., and Van Cappellen, P.: Glacial-interglacial
variations in marine phosphorus cycling: Implications for ocean
productivity, Global Biogeochem. Cy., 22, GB4004, https://doi.org/10.1029/2007GB003054, 2008.
Tyrrell, T.: The relative influences of nitrogen and phosphorus on oceanic primary production, Nature, 400, 525–531, 1999.
Wallmann, K.: Feedbacks between oceanic redox states and marine
productivity: A model perspective focused on benthic phosphorus cycling,
Global Biogeochem. Cy., 17, 1084, https://doi.org/10.1029/2002GB001968, 2003.
Wallmann, K.: Phosphorus imbalance in the global ocean?, Global Biogeochem.
Cy., 24, GB4030, https://doi.org/10.1029/2009GB003643, 2010.
Wallmann, K., Schneider, B., and Sarnthein, M.: Effects of eustatic sea-level change, ocean dynamics, and nutrient utilization on atmospheric pCO2 and seawater composition over the last 130 000 years: a model study, Clim. Past, 12, 339–375, https://doi.org/10.5194/cp-12-339-2016, 2016.
Wunder, L. C., Aromokeye, D. A., Yin, X., Richter-Heitmann, T.,
Willis-Poratti, G., Schnakenberg, A., Otersen, C., Dohrmann, I., Römer,
M., Bohrmann, G., Kasten, S., and Friedrich, M. W.: Iron and sulfate reduction
structure microbial communities in (sub-)Antarctic sediments, ISME J.,
15, 3587–3604, 2021.
Yao, W. and Millero, F. J.: Adsorption of phosphate on manganese dioxide in
seawater, Environ. Sci. Tech., 30, 536–541, 1996.
Short summary
A glacial–interglacial methane-fuelled redistribution of reactive phosphorus between the oceanic and sedimentary phosphorus reservoirs can occur in the ocean when falling sea level lowers the pressure on the seafloor, destabilizes methane hydrates, and triggers the dissolution of P-bearing iron oxides. The mass of phosphate potentially mobilizable from the sediment is similar to the size of the current oceanic reservoir. Hence, this process may play a major role in the marine phosphorus cycle.
A glacial–interglacial methane-fuelled redistribution of reactive phosphorus between the oceanic...
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