Articles | Volume 19, issue 14
https://doi.org/10.5194/bg-19-3445-2022
© 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-19-3445-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
21 Jul 2022
Research article |
| 21 Jul 2022
| 21 Jul 2022
Benthic silicon cycling in the Arctic Barents Sea: a reaction–transport model study
James P. J. Ward
CORRESPONDING AUTHOR
School of Earth Sciences, University of Bristol, Bristol, BS8 1QE, UK
Katharine R. Hendry
School of Earth Sciences, University of Bristol, Bristol, BS8 1QE, UK
British Antarctic Survey, Cambridge, CB3 0ET, UK
Sandra Arndt
BGeoSys, Department of Geosciences, Université libre de Bruxelles, Brussels, CP160/03 1050, Belgium
Johan C. Faust
MARUM – Center for Marine Environmental Sciences, University of Bremen, 28359 Bremen, Germany
School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
Felipe S. Freitas
School of Earth Sciences, University of Bristol, Bristol, BS8 1QE, UK
BGeoSys, Department of Geosciences, Université libre de Bruxelles, Brussels, CP160/03 1050, Belgium
Sian F. Henley
School of GeoSciences, The University of Edinburgh, Edinburgh, EH9 3FE, UK
Jeffrey W. Krause
Dauphin Island Sea Lab, Dauphin Island, AL, USA
School of Marine and Environmental Sciences, University of South Alabama, Mobile, AL, USA
Christian März
School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
Institute for Geosciences, University of Bonn, 853115 Bonn, Germany
Allyson C. Tessin
Department of Geology, Kent State University, Kent, OH, USA
Ruth L. Airs
Plymouth Marine Laboratory, Prospect Place, Plymouth, PL1 3DH, UK
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Thomas M. Jordan, Giorgio Dall'Olmo, Gavin Tilstone, Robert J. W. Brewin, Francesco Nencioli, Ruth Airs, Crystal S. Thomas, and Louise Schlüter
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2024-267, https://doi.org/10.5194/essd-2024-267, 2024
Revised manuscript accepted for ESSD
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We present a compilation of water optical properties and phytoplankton pigments from the surface of the Atlantic Ocean collected during nine cruises between 2009–2019. We derive continuous Chlorophyll a concentrations (a biomass proxy) from water absorption. We then illustrate geographical variations and relationships for water optical properties, Chlorophyll a, and the other pigments. The dataset will be useful to researchers in ocean optics, remote-sensing, ecology, and biogeochemistry.
Ben J. Fisher, Alex J. Poulton, Michael P. Meredith, Kimberlee Baldry, Oscar Schofield, and Sian F. Henley
EGUsphere, https://doi.org/10.5194/egusphere-2024-990, https://doi.org/10.5194/egusphere-2024-990, 2024
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The Southern Ocean is a rapidly warming environment, with subsequent impacts on ecosystems and biogeochemical cycling. This study examines changes in phytoplankton and biogeochemistry using a range of climate models. Under climate change the Southern Ocean will be warmer, more acidic, more productive and have reduced nutrient availability by 2100. However, there is substantial variability between models across key productivity parameters, we propose ways of reducing this uncertainty.
Aaron A. Naidoo-Bagwell, Fanny M. Monteiro, Katharine R. Hendry, Scott Burgan, Jamie D. Wilson, Ben A. Ward, Andy Ridgwell, and Daniel J. Conley
Geosci. Model Dev., 17, 1729–1748, https://doi.org/10.5194/gmd-17-1729-2024, https://doi.org/10.5194/gmd-17-1729-2024, 2024
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As an extension to the EcoGEnIE 1.0 Earth system model that features a diverse plankton community, EcoGEnIE 1.1 includes siliceous plankton diatoms and also considers their impact on biogeochemical cycles. With updates to existing nutrient cycles and the introduction of the silicon cycle, we see improved model performance relative to observational data. Through a more functionally diverse plankton community, the new model enables more comprehensive future study of ocean ecology.
Andrea J. McEvoy, Angus Atkinson, Ruth L. Airs, Rachel Brittain, Ian Brown, Elaine S. Fileman, Helen S. Findlay, Caroline L. McNeill, Clare Ostle, Tim J. Smyth, Paul J. Somerfield, Karen Tait, Glen A. Tarran, Simon Thomas, Claire E. Widdicombe, E. Malcolm S. Woodward, Amanda Beesley, David V. P. Conway, James Fishwick, Hannah Haines, Carolyn Harris, Roger Harris, Pierre Hélaouët, David Johns, Penelope K. Lindeque, Thomas Mesher, Abigail McQuatters-Gollop, Joana Nunes, Frances Perry, Ana M. Queiros, Andrew Rees, Saskia Rühl, David Sims, Ricardo Torres, and Stephen Widdicombe
Earth Syst. Sci. Data, 15, 5701–5737, https://doi.org/10.5194/essd-15-5701-2023, https://doi.org/10.5194/essd-15-5701-2023, 2023
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Western Channel Observatory is an oceanographic time series and biodiversity reference site within 40 km of Plymouth (UK), sampled since 1903. Differing levels of reporting and formatting hamper the use of the valuable individual datasets. We provide the first summary database as monthly averages where comparisons can be made of the physical, chemical and biological data. We describe the database, illustrate its utility to examine seasonality and longer-term trends, and summarize previous work.
Anna Belcher, Sian F. Henley, Katharine Hendry, Marianne Wootton, Lisa Friberg, Ursula Dallman, Tong Wang, Christopher Coath, and Clara Manno
Biogeosciences, 20, 3573–3591, https://doi.org/10.5194/bg-20-3573-2023, https://doi.org/10.5194/bg-20-3573-2023, 2023
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The oceans play a crucial role in the uptake of atmospheric carbon dioxide, particularly the Southern Ocean. The biological pumping of carbon from the surface to the deep ocean is key to this. Using sediment trap samples from the Scotia Sea, we examine biogeochemical fluxes of carbon, nitrogen, and biogenic silica and their stable isotope compositions. We find phytoplankton community structure and physically mediated processes are important controls on particulate fluxes to the deep ocean.
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.
Ben J. Fisher, Alex J. Poulton, Michael P. Meredith, Kimberlee Baldry, Oscar Schofield, and Sian F. Henley
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-10, https://doi.org/10.5194/bg-2023-10, 2023
Revised manuscript not accepted
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The Southern Ocean is warming faster than the global average. As a globally important carbon sink and nutrient source, climate driven changes in ecosystems can be expected to cause widespread changes to biogeochemical cycles. We analysed earth system models and showed that productivity is expected to increase across the Southern Ocean, driven by different phytoplankton groups at different latitudes. These predictions carry large uncertainties, we propose targeted studies to reduce this error.
Michael J. Whitehouse, Katharine R. Hendry, Geraint A. Tarling, Sally E. Thorpe, and Petra ten Hoopen
Earth Syst. Sci. Data, 15, 211–224, https://doi.org/10.5194/essd-15-211-2023, https://doi.org/10.5194/essd-15-211-2023, 2023
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We present a database of Southern Ocean macronutrient, temperature and salinity measurements collected on 20 oceanographic cruises between 1980 and 2009. Vertical profiles and underway surface measurements were collected year-round as part of an integrated ecosystem study. Our data provide a novel view of biogeochemical cycling in biologically productive regions across a critical period in recent climate history and will contribute to a better understanding of the drivers of primary production.
André Valente, Shubha Sathyendranath, Vanda Brotas, Steve Groom, Michael Grant, Thomas Jackson, Andrei Chuprin, Malcolm Taberner, Ruth Airs, David Antoine, Robert Arnone, William M. Balch, Kathryn Barker, Ray Barlow, Simon Bélanger, Jean-François Berthon, Şükrü Beşiktepe, Yngve Borsheim, Astrid Bracher, Vittorio Brando, Robert J. W. Brewin, Elisabetta Canuti, Francisco P. Chavez, Andrés Cianca, Hervé Claustre, Lesley Clementson, Richard Crout, Afonso Ferreira, Scott Freeman, Robert Frouin, Carlos García-Soto, Stuart W. Gibb, Ralf Goericke, Richard Gould, Nathalie Guillocheau, Stanford B. Hooker, Chuamin Hu, Mati Kahru, Milton Kampel, Holger Klein, Susanne Kratzer, Raphael Kudela, Jesus Ledesma, Steven Lohrenz, Hubert Loisel, Antonio Mannino, Victor Martinez-Vicente, Patricia Matrai, David McKee, Brian G. Mitchell, Tiffany Moisan, Enrique Montes, Frank Muller-Karger, Aimee Neeley, Michael Novak, Leonie O'Dowd, Michael Ondrusek, Trevor Platt, Alex J. Poulton, Michel Repecaud, Rüdiger Röttgers, Thomas Schroeder, Timothy Smyth, Denise Smythe-Wright, Heidi M. Sosik, Crystal Thomas, Rob Thomas, Gavin Tilstone, Andreia Tracana, Michael Twardowski, Vincenzo Vellucci, Kenneth Voss, Jeremy Werdell, Marcel Wernand, Bozena Wojtasiewicz, Simon Wright, and Giuseppe Zibordi
Earth Syst. Sci. Data, 14, 5737–5770, https://doi.org/10.5194/essd-14-5737-2022, https://doi.org/10.5194/essd-14-5737-2022, 2022
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A compiled set of in situ data is vital to evaluate the quality of ocean-colour satellite data records. Here we describe the global compilation of bio-optical in situ data (spanning from 1997 to 2021) used for the validation of the ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI). The compilation merges and harmonizes several in situ data sources into a simple format that could be used directly for the evaluation of satellite-derived ocean-colour data.
Sebastian Landwehr, Michele Volpi, F. Alexander Haumann, Charlotte M. Robinson, Iris Thurnherr, Valerio Ferracci, Andrea Baccarini, Jenny Thomas, Irina Gorodetskaya, Christian Tatzelt, Silvia Henning, Rob L. Modini, Heather J. Forrer, Yajuan Lin, Nicolas Cassar, Rafel Simó, Christel Hassler, Alireza Moallemi, Sarah E. Fawcett, Neil Harris, Ruth Airs, Marzieh H. Derkani, Alberto Alberello, Alessandro Toffoli, Gang Chen, Pablo Rodríguez-Ros, Marina Zamanillo, Pau Cortés-Greus, Lei Xue, Conor G. Bolas, Katherine C. Leonard, Fernando Perez-Cruz, David Walton, and Julia Schmale
Earth Syst. Dynam., 12, 1295–1369, https://doi.org/10.5194/esd-12-1295-2021, https://doi.org/10.5194/esd-12-1295-2021, 2021
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The Antarctic Circumnavigation Expedition surveyed a large number of variables describing the dynamic state of ocean and atmosphere, freshwater cycle, atmospheric chemistry, ocean biogeochemistry, and microbiology in the Southern Ocean. To reduce the dimensionality of the dataset, we apply a sparse principal component analysis and identify temporal patterns from diurnal to seasonal cycles, as well as geographical gradients and
hotspotsof interaction. Code and data are open access.
Philip Pika, Dominik Hülse, and Sandra Arndt
Geosci. Model Dev., 14, 7155–7174, https://doi.org/10.5194/gmd-14-7155-2021, https://doi.org/10.5194/gmd-14-7155-2021, 2021
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OMEN-SED is a model for early diagenesis in marine sediments simulating organic matter (OM) degradation and nutrient dynamics. We replaced the original description with a more realistic one accounting for the widely observed decrease in OM reactivity. The new model reproduces pore water profiles and sediment–water interface fluxes across different environments. This functionality extends the model’s applicability to a broad range of environments and timescales while requiring fewer parameters.
Felipe S. Freitas, Philip A. Pika, Sabine Kasten, Bo B. Jørgensen, Jens Rassmann, Christophe Rabouille, Shaun Thomas, Henrik Sass, Richard D. Pancost, and Sandra Arndt
Biogeosciences, 18, 4651–4679, https://doi.org/10.5194/bg-18-4651-2021, https://doi.org/10.5194/bg-18-4651-2021, 2021
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It remains challenging to fully understand what controls carbon burial in marine sediments globally. Thus, we use a model–data approach to identify patterns of organic matter reactivity at the seafloor across distinct environmental conditions. Our findings support the notion that organic matter reactivity is a dynamic ecosystem property and strongly influences biogeochemical cycling and exchange. Our results are essential to improve predictions of future changes in carbon cycling and climate.
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.
Susana Agustí, Jeffrey W. Krause, Israel A. Marquez, Paul Wassmann, Svein Kristiansen, and Carlos M. Duarte
Biogeosciences, 17, 35–45, https://doi.org/10.5194/bg-17-35-2020, https://doi.org/10.5194/bg-17-35-2020, 2020
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We found that 24 % of the total diatoms community in the Arctic water column (450 m depth) was located below the photic layer. Healthy diatom communities in active spring–bloom stages remained in the photic layer. Dying diatom communities exported a large fraction of the biomass to the aphotic zone, fuelling carbon sequestration and benthic ecosystems in the Arctic. The results of the study conform to a conceptual model where diatoms grow during the bloom until silicic acid stocks are depleted.
Elizabeth Atar, Christian März, Andrew C. Aplin, Olaf Dellwig, Liam G. Herringshaw, Violaine Lamoureux-Var, Melanie J. Leng, Bernhard Schnetger, and Thomas Wagner
Clim. Past, 15, 1581–1601, https://doi.org/10.5194/cp-15-1581-2019, https://doi.org/10.5194/cp-15-1581-2019, 2019
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We present a geochemical and petrographic study of the Kimmeridge Clay Formation from the Cleveland Basin (Yorkshire, UK). Our results indicate that deposition during this interval was very dynamic and oscillated between three distinct modes of sedimentation. In line with recent modelling results, we propose that these highly dynamic conditions were driven by changes in climate, which affected continental weathering, enhanced primary productivity, and led to organic carbon enrichment.
Jeffrey W. Krause, Carlos M. Duarte, Israel A. Marquez, Philipp Assmy, Mar Fernández-Méndez, Ingrid Wiedmann, Paul Wassmann, Svein Kristiansen, and Susana Agustí
Biogeosciences, 15, 6503–6517, https://doi.org/10.5194/bg-15-6503-2018, https://doi.org/10.5194/bg-15-6503-2018, 2018
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Diatoms can dominate the Arctic Ocean spring bloom, the key annual event for regional food webs. Diatom growth requires silicon and this nutrient has been declining in the European Arctic. This study communicates an unprecedented combination of silicon-cycling measurements around Svalbard during the spring and shows that dissolved silicon can limit diatom production. These results suggest an important coupling of silicon and carbon cycling during the spring bloom in the European Arctic.
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The fate of fixed nitrogen in Santa Barbara Basin sediments during seasonal anoxia
Dissolved Mn(III) is a key redox intermediate in sediments of a seasonally euxinic coastal basin
Unexpected scarcity of ANME Archaea in hydrocarbon seeps within Monterey Bay
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
Evidence of cryptic methane cycling and non-methanogenic methylamine consumption in the sulfate-reducing zone of sediment in the Santa Barbara Basin, California
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Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph
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Carbon sources of benthic fauna in temperate lakes across multiple trophic states
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Bioturbation has a limited effect on phosphorus burial in salt marsh sediments
Biogeochemical impact of cable bacteria on coastal Black Sea sediment
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Benthic alkalinity and dissolved inorganic carbon fluxes in the Rhône River prodelta generated by decoupled aerobic and anaerobic processes
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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.
Ellen Schnabel, Aurèle Vuillemin, Cédric C. Laczny, Benoit J. Kunath, André R. Soares, Rolando Di Primio, Jens Kallmeyer, and the PROSPECTOMICS Consortium
EGUsphere, https://doi.org/10.5194/egusphere-2024-1603, https://doi.org/10.5194/egusphere-2024-1603, 2024
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This study analyzed marine sediment samples from areas with and without minimal hydrocarbon seepage from reservoirs underneath. Depth profiles of dissolved chemical components in the pore water as well as 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 detection of hydrocarbon reservoirs.
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.
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
EGUsphere, https://doi.org/10.5194/egusphere-2024-1706, https://doi.org/10.5194/egusphere-2024-1706, 2024
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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 Clare Semler and Anne Elizabeth Dekas
EGUsphere, https://doi.org/10.5194/egusphere-2024-1377, https://doi.org/10.5194/egusphere-2024-1377, 2024
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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.
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.
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.
Bjorn Sundby, Pierre Anschutz, Pascal Lecroart, and Alfonso Mucci
Biogeosciences, 19, 1421–1434, https://doi.org/10.5194/bg-19-1421-2022, https://doi.org/10.5194/bg-19-1421-2022, 2022
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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.
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.
Perran Louis Miall Cook, Adam John Kessler, and Bradley David Eyre
Biogeosciences, 14, 4061–4069, https://doi.org/10.5194/bg-14-4061-2017, https://doi.org/10.5194/bg-14-4061-2017, 2017
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Nitrogen is the key nutrient that typically limits productivity in coastal waters. One of the key controls on the amount of bioavailable nitrogen is the process of denitrification, which converts nitrate (bioavailable) into nitrogen gas. Previous studies suggest high rates of denitrification may take place within carbonate sediments, and one explanation for this is that this process may take place within the sand grains. Here we show evidence to support this hypothesis.
Chris T. Parsons, Fereidoun Rezanezhad, David W. O'Connell, and Philippe Van Cappellen
Biogeosciences, 14, 3585–3602, https://doi.org/10.5194/bg-14-3585-2017, https://doi.org/10.5194/bg-14-3585-2017, 2017
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Phosphorus (P) has accumulated in sediments due to past human activities. The re-release of this P to water contributes to the growth of harmful algal blooms. Our research improves our mechanistic understanding of how P is partitioned between different chemical forms and between sediment and water under dynamic conditions. We demonstrate that P trapped within iron minerals may be less mobile during anoxic conditions than previously thought due to reversible changes to P forms within sediment.
Clint M. Miller, Gerald R. Dickens, Martin Jakobsson, Carina Johansson, Andrey Koshurnikov, Matt O'Regan, Francesco Muschitiello, Christian Stranne, and Carl-Magnus Mörth
Biogeosciences, 14, 2929–2953, https://doi.org/10.5194/bg-14-2929-2017, https://doi.org/10.5194/bg-14-2929-2017, 2017
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Continental slopes north of the East Siberian Sea are assumed to hold large amounts of methane. We present pore water chemistry from the 2014 SWERUS-C3 expedition. These are among the first results generated from this vast climatically sensitive region, and they imply that abundant methane, including gas hydrates, do not characterize the East Siberian Sea slope or rise. This contradicts previous modeling and discussions, which due to the lack of data are almost entirely based assumption.
Cited articles
Aguilera, D. R., Jourabchi, P., Spiteri, C., and Regnier, P.: A
knowledge-based reactive transport approach for the simulation of
biogeochemical dynamics in Earth systems, Geochem. Geophy. Geosy., 6,
https://doi.org/10.1029/2004GC000899, 2005. a
Aller, R. C.: 8.11 – Sedimentary Diagenesis, Depositional Environments, and
Benthic Fluxes, Treatise on Geochemistry, 2nd Edn., 8, 293–334,
https://doi.org/10.1016/B978-0-08-095975-7.00611-2, 2014. a, b
Årthun, M., Eldevik, T., Smedsrud, L. H., Skagseth, and Ingvaldsen, R. B.:
Quantifying the influence of atlantic heat on barents sea ice variability
and retreat, J. Clim., 25, 4736–4743, https://doi.org/10.1175/JCLI-D-11-00466.1,
2012. a, b, c
Backman, J., Jakobsson, M., Løvlie, R., Polyak, L., and Febo, L. A.: Is the
central Arctic Ocean a sediment starved basin?, Quaternary Sci. Rev., 23,
1435–1454, https://doi.org/10.1016/j.quascirev.2003.12.005, 2004. a
Barton, B. I., Lenn, Y. D., and Lique, C.: Observed atlantification of the
Barents Sea causes the Polar Front to limit the expansion of winter sea ice,
J. Phys. Oceanogr., 48, 1849–1866, https://doi.org/10.1175/JPO-D-18-0003.1, 2018. a, b
Berner, R.: Early diagenesis: a theoretical approach, Princeton University
Press, Princeton, NJ, ISBN 9780691082608, 1980. a
Bourgeois, S., Archambault, P., and Witte, U.: Organic matter remineralization
in marine sediments: A Pan-Arctic synthesis, Global Biogeochem. Cy., 31,
190–213, https://doi.org/10.1002/2016GB005378, 2017. a
Boutorh, J., Moriceau, B., Gallinari, M., Ragueneau, O., and Bucciarelli, E.:
Effect of trace metal-limited growth on the postmortem dissolution of the
marine diatom Pseudo-nitzschia delicatissima, Global Biogeochem. Cy., 30,
57–69, https://doi.org/10.1002/2015GB005088, 2016. a
Brzezinski, M. A., Closset, I., Jones, J. L., de Souza, G. F., and Maden, C.:
New Constraints on the Physical and Biological Controls on the Silicon
Isotopic Composition of the Arctic Ocean, Front. Mar. Sci., 8, 699762,
https://doi.org/10.3389/fmars.2021.699762, 2021. a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r
Cassarino, L., Hendry, K. R., Henley, S. F., MacDonald, E., Arndt, S., Freitas,
F. S., Pike, J., and Firing, Y. L.: Sedimentary Nutrient Supply in
Productive Hot Spots off the West Antarctic Peninsula Revealed by Silicon
Isotopes, Global Biogeochem. Cy., 34, https://doi.org/10.1029/2019GB006486, 2020. a, b, c
Cochrane, S. K., Denisenko, S. G., Renaud, P. E., Emblow, C. S., Ambrose,
W. G., Ellingsen, I. H., and Skardhamar, J.: Benthic macrofauna and
productivity regimes in the Barents Sea – Ecological implications in a
changing Arctic, J. Sea Res., 61, 222–233,
https://doi.org/10.1016/j.seares.2009.01.003, 2009. a
Dale, A. W., Paul, K. M., Clemens, D., Scholz, F., Schroller-Lomnitz, U.,
Wallmann, K., Geilert, S., Hensen, C., Plass, A., Liebetrau, V., Grasse, P.,
and Sommer, S.: Recycling and Burial of Biogenic Silica in an Open Margin
Oxygen Minimum Zone, Global Biogeochem. Cy., 35,
https://doi.org/10.1029/2020GB006583, 2021. a, b
Dalpadado, P., Arrigo, K. R., van Dijken, G. L., Skjoldal, H. R., Bagøien,
E., Dolgov, A. V., Prokopchuk, I. P., and Sperfeld, E.: Climate effects on
temporal and spatial dynamics of phytoplankton and zooplankton in the Barents
Sea, Prog. Oceanogr., 185, 102320, https://doi.org/10.1016/j.pocean.2020.102320, 2020. a, b
De La Rocha, C. L., Brzezinski, M. A., and DeNiro, M. J.: Fractionation of
silicon isotopes by marine diatoms during biogenic silica formation,
Geochim. Cosmochim. Ac., 61, 5051–5056,
https://doi.org/10.1016/S0016-7037(97)00300-1, 1997. a
Degerlund, M. and Eilertsen, H. C.: Main Species Characteristics of
Phytoplankton Spring Blooms in NE Atlantic and Arctic Waters (68–80∘ N),
Estuaries Coast, 33, 242–269, https://doi.org/10.1007/s12237-009-9167-7, 2010. a
Delstanche, S., Opfergelt, S., Cardinal, D., Elsass, F., André, L., and
Delvaux, B.: Silicon isotopic fractionation during adsorption of aqueous
monosilicic acid onto iron oxide, Geochim. Cosmochim. Ac., 73, 923–924,
https://doi.org/10.1016/j.gca.2008.11.014, 2009. a, b
Demarest, M. S., Brzezinski, M. A., and Beucher, C. P.: Fractionation of
silicon isotopes during biogenic silica dissolution, Geochim. Cosmochim.
Ac., 73, 5572–5583, https://doi.org/10.1016/j.gca.2009.06.019, 2009. a
DeMaster, D.: Marine Silica Cycle, in: Encyclopedia of Ocean Sciences,
Academic Press, 1659–1667, https://doi.org/10.1006/rwos.2001.0278, 2001. a, b, c
DeMaster, D. J.: The global marine silica budget: Sources and sinks, in:
Encyclopedia of Ocean Sciences, Elsevier Ltd., 473–483,
https://doi.org/10.1016/B978-0-12-409548-9.10799-7, 2019. a, b
DeMaster, D. J., Ragueneau, O., and Nittrouer, C. A.: Preservation
efficiencies and accumulation rates for biogenic silica and organic C, N, and
P in high-latitude sediments: The Ross Sea, J. Geophys. Res.-Ocean., 101,
18501–18518, https://doi.org/10.1029/96JC01634, 1996. a
Dixit, S., Van Cappellen, P., and Van Bennekom, A. J.: Processes
controlling solubility of biogenic silica and pore water build-up of silicic
acid in marine sediments, Mar. Chem., 73, 333–352,
https://doi.org/10.1016/S0304-4203(00)00118-3, 2001. a
Downes, P. P., Goult, S. J., Woodward, E. M. S., Widdicombe, C. E., Tait, K.,
and Dixon, J. L.: Phosphorus dynamics in the Barents Sea, Limnol.
Oceanogr., 66, S326–S342, https://doi.org/10.1002/lno.11602, 2021. a
Druzhkova, E., Oleinik, A., and Makarevich, P.: Live autochthonous benthic
diatoms on the lower depths of Arctic continental shelf, Preliminary
results, Oceanologia, 60, 97–100, https://doi.org/10.1016/j.oceano.2017.07.001, 2018. a
Dybwad, C., Assmy, P., Olsen, L. M., Peeken, I., Nikolopoulos, A., Krumpen, T.,
Randelhoff, A., Tatarek, A., Wiktor, J. M., and Reigstad, M.: Carbon Export
in the Seasonal Sea Ice Zone North of Svalbard From Winter to Late Summer,
Front. Mar. Sci., 7, 525800. https://doi.org/10.3389/fmars.2020.525800, 2021. a, b
Egan, K. E., Rickaby, R. E., Leng, M. J., Hendry, K. R., Hermoso, M., Sloane,
H. J., Bostock, H., and Halliday, A. N.: Diatom silicon isotopes as a proxy
for silicic acid utilisation: A Southern Ocean core top calibration,
Geochim. Cosmochim. Ac., 96, 174–192, https://doi.org/10.1016/j.gca.2012.08.002,
2012. a
Ehlert, C., Doering, K., Wallmann, K., Scholz, F., Sommer, S., Grasse, P.,
Geilert, S., and Frank, M.: Stable silicon isotope signatures of marine pore
waters – Biogenic opal dissolution versus authigenic clay mineral
formation, Geochim. Cosmochim. Ac., 191, 102–117,
https://doi.org/10.1016/j.gca.2016.07.022, 2016a. a, b, c, d, e, f, g, h, i, j, k, l
Ehlert, C., Reckhardt, A., Greskowiak, J., Liguori, B. T., Böning, P.,
Paffrath, R., Brumsack, H. J., and Pahnke, K.: Transformation of silicon in
a sandy beach ecosystem: Insights from stable silicon isotopes from fresh and
saline groundwaters, Chem. Geol., 440, 207–218,
https://doi.org/10.1016/j.chemgeo.2016.07.015, 2016b. a, b
Fabre, S., Jeandel, C., Zambardi, T., Roustan, M., and Almar, R.: An
Overlooked Silica Source of the Modern Oceans: Are Sandy Beaches the Key?,
Front. Earth Sci., 7, 231, https://doi.org/10.3389/feart.2019.00231, 2019. a, b
Fadeev, E., Rogge, A., Ramondenc, S., Nöthig, E.-M., Wekerle, C.,
Bienhold, C., Salter, I., Waite, A. M., Hehemann, L., Boetius, A., and
Iversen, M. H.: Sea ice presence is linked to higher carbon export and
vertical microbial connectivity in the Eurasian Arctic Ocean, Commun. Biol.,
4, 1255, https://doi.org/10.1038/s42003-021-02776-w, 2021. a, b, c
Fanning, K. A. and Schink, D. R.: Interaction of Marine Sediments with
Dissolved Silica, Limnol. Oceanogr., 14, 59–68,
https://doi.org/10.4319/lo.1969.14.1.0059, 1969. a
Faust, J. C., Stevenson, M., Abbott, G., and Knies, J.: Does Arctic warming
reduce preservation of organic matter in Barents Sea sediments?, Philos.
T. R. Soc. A, 378, 2181, https://doi.org/10.1098/rsta.2019.0364, 2020. a, b
Faust, J. C., Tessin, A., Fisher, B. J., Zindorf, M., Papadaki, S., Hendry,
K. R., Doyle, K. A., and März, C.: Millennial scale persistence of
organic carbon bound to iron in Arctic marine sediments, Nat. Commun., 12, 2181,
https://doi.org/10.1038/s41467-020-20550-0, 2021. a, b, c
Freitas, F. S., Hendry, K. R., Henley, S. F., Faust, J. C., Tessin, A. C.,
Stevenson, M. A., Abbott, G. D., März, C., and Arndt, S.:
Benthic-pelagic coupling in the Barents Sea: an integrated data-model
framework, Philos. T. R. Soc. A, 378, 2181, https://doi.org/10.1098/rsta.2019.0359,
2020. a, b, c, d
Freitas, F. S., Pika, P. A., Kasten, S., Jorgensen, B. B., Rassmann, J.,
Rabouille, C., Thomas, S., Sass, H., Pancost, R. D., and Arndt, S.: New
insights into large-scale trends of apparent organic matter reactivity in
marine sediments and patterns of benthic carbon transformation,
Biogeosciences, 18, 4651–4679, https://doi.org/10.5194/bg-18-4651-2021, 2021. a
Frings, P.: Revisiting the dissolution of biogenic Si in marine sediments: a
key term in the ocean Si budget, Acta Geochim., 36, 429–432,
https://doi.org/10.1007/s11631-017-0183-1, 2017. a, b
Frings, P. J., Clymans, W., Fontorbe, G., De La Rocha, C. L., and Conley,
D. J.: The continental Si cycle and its impact on the ocean Si isotope
budget, Chem. Geol., 425, 12–36, https://doi.org/10.1016/j.chemgeo.2016.01.020, 2016. a
Geilert, S., Grasse, P., Doering, K., Wallmann, K., Ehlert, C., Scholz, F.,
Frank, M., Schmidt, M., and Hensen, C.: Impact of ambient conditions on the
Si isotope fractionation in marine pore fluids during early diagenesis,
Biogeosciences, 17, 1745–1763, https://doi.org/10.5194/bg-17-1745-2020,
2020a. a, b, c, d, e, f, g, h
Geilert, S., Grasse, P., Wallmann, K., Liebetrau, V., and Menzies, C. D.:
Serpentine alteration as source of high dissolved silicon and elevated
δ30Si values to the marine Si cycle, Nat. Commun., 11, 5123,
https://doi.org/10.1038/s41467-020-18804-y, 2020b. a
Gruber, C., Harlavan, Y., Pousty, D., Winkler, D., and Ganor, J.: Enhanced
chemical weathering of albite under seawater conditions and its potential
effect on the Sr ocean budget, Geochim. Cosmochim. Ac., 261, 20–34,
https://doi.org/10.1016/j.gca.2019.06.049, 2019. a
Hátún, H., Azetsu-Scott, K., Somavilla, R., Rey, F., Johnson, C.,
Mathis, M., Mikolajewicz, U., Coupel, P., Tremblay, J., Hartman, S., Pacariz,
S. V., Salter, I., and Ólafsson, J.: The subpolar gyre regulates
silicate concentrations in the North Atlantic, Sci. Rep., 7, 14576,
https://doi.org/10.1038/s41598-017-14837-4, 2017. a
Hodal, H. and Kristiansen, S.: The importance of small-celled phytoplankton in
spring blooms at the marginal ice zone in the northern Barents Sea, Deep-Sea
Res. Pt. II, 55, 2176–2185, https://doi.org/10.1016/j.dsr2.2008.05.012, 2008. a
Hughes, H. J., Sondag, F., Santos, R. V., André, L., and Cardinal, D.:
The riverine silicon isotope composition of the Amazon Basin, Geochim.
Cosmochim. Ac., 121, 637–651, https://doi.org/10.1016/j.gca.2013.07.040, 2013. a
Hurd, D. C.: Factors affecting solution rate of biogenic opal in seawater,
Earth Planet. Sc. Lett., 15, 411–417, https://doi.org/10.1016/0012-821X(72)90040-4,
1972. a
Hurd, D. C.: Interactions of biogenic opal, sediment and seawater in the
Central Equatorial Pacific, Geochim. Cosmochim. Ac., 37, 2257–2282,
https://doi.org/10.1016/0016-7037(73)90103-8, 1973. a
Hurd, D. C., Fraley, C., and Fugate, J. K.: Silica Apparent Solubilities and
Rates of Dissolution and Precipitation for ca. 25 Common Minerals at
1∘–2 ∘C, pH 7.5–8.5 in Seawater, in: Chemical Modeling in Aqueous Systems,
edited by: Jenne, E., chap. 21, American Chemical Society,
Washington, DC, 413–445, https://doi.org/10.1021/bk-1979-0093.ch021, 1979. a
Ingvaldsen, R. B., Assmann, K. M., Primicerio, R., Fossheim, M., Polyakov,
I. V., and Dolgov, A. V.: Physical manifestations and ecological
implications of Arctic Atlantification, Nat. Rev. Earth Environ., 2,
874–889, 2021. a
Isson, T. T. and Planavsky, N. J.: Reverse weathering as a long-term
stabilizer of marine pH and planetary climate, Nature, 560, 471–475,
https://doi.org/10.1038/s41586-018-0408-4, 2018. a
Jakobsson, M., Mayer, L., Coakley, B., Dowdeswell, J. A., Forbes, S., Fridman,
B., Hodnesdal, H., Noormets, R., Pedersen, R., Rebesco, M., Schenke, H. W.,
Zarayskaya, Y., Accettella, D., Armstrong, A., Anderson, R. M., Bienhoff, P.,
Camerlenghi, A., Church, I., Edwards, M., Gardner, J. V., Hall, J. K., Hell,
B., Hestvik, O., Kristoffersen, Y., Marcussen, C., Mohammad, R., Mosher, D.,
Nghiem, S. V., Pedrosa, M. T., Travaglini, P. G., and Weatherall, P.: The
International Bathymetric Chart of the Arctic Ocean (IBCAO) Version 3.0,
Geophys. Res. Lett., 39, https://doi.org/10.1029/2012GL052219, 2012. a
Jeandel, C. and Oelkers, E. H.: The influence of terrigenous particulate
material dissolution on ocean chemistry and global element cycles, Chem.
Geol., 395, 50–66, https://doi.org/10.1016/j.chemgeo.2014.12.001, 2015. a
Jeandel, C., Peucker-Ehrenbrink, B., Jones, M. T., Pearce, C. R., Oelkers,
E. H., Godderis, Y., Lacan, F., Aumont, O., and Arsouze, T.: Ocean margins:
The missing term in oceanic element budgets?, Eos, 92, 217–224,
https://doi.org/10.1029/2011EO260001, 2011. a
Kamatani, A.: Dissolution rates of silica from diatoms decomposing at various
temperatures, Mar. Biol., 68, 91–96, https://doi.org/10.1007/BF00393146, 1982. a
Kamatani, A. and Riley, J. P.: Rate of dissolution of diatom silica walls in
seawater, Mar. Biol., 55, 29–35, https://doi.org/10.1007/BF00391714, 1979. a
Kemp, E., Roseburrough, R., Elliott, E., and Krause, J.: Spatial Variability
of Sediment Amorphous Silica and its Reactivity in a Northern Gulf of Mexico
Estuary and Coastal Zone, Gulf Caribb. Res., 32, SC6–SC11, 2021. a
Krause, J. W., Duarte, C. M., Marquez, I. A., Assmy, P.,
Fernández-Méndez, M., Wiedmann, I., Wassmann, P., Kristiansen,
S., and Agustí, S.: Biogenic silica production and diatom dynamics in
the Svalbard region during spring, Biogeosciences, 15, 6503–6517,
https://doi.org/10.5194/bg-15-6503-2018, 2018. a
Lalande, C., Bauerfeind, E., Nöthig, E. M., and Beszczynska-Möller,
A.: Impact of a warm anomaly on export fluxes of biogenic matter in the
eastern Fram Strait, Prog. Oceanogr., 109, 70–77,
https://doi.org/10.1016/j.pocean.2012.09.006, 2013. a
Lalande, C., Moriceau, B., Leynaert, A., and Morata, N.: Spatial and temporal
variability in export fluxes of biogenic matter in Kongsfjorden, Polar
Biol., 39, 1725–1738, https://doi.org/10.1007/s00300-016-1903-4, 2016. a
Lerman, A., Mackenzie, F. T., and Bricker, O. P.: Rates of dissolution of
aluminosilicates in seawater, Earth Planet. Sci. Lett., 25, 82–88,
https://doi.org/10.1016/0012-821X(75)90213-7, 1975. a, b, c
Lien, V. S., Vikebø, F. B., and Skagseth, O.: One mechanism contributing to
co-variability of the Atlantic inflow branches to the Arctic, Nat. Commun.,
4, 1488, https://doi.org/10.1038/ncomms2505, 2013. a
Liguori, B. T., Ehlert, C., and Pahnke, K.: The Influence of Water Mass Mixing
and Particle Dissolution on the Silicon Cycle in the Central Arctic Ocean,
Front. Earth Sci., 7, 202, https://doi.org/10.3389/fmars.2020.00202, 2020. a, b
Lind, S., Ingvaldsen, R. B., and Furevik, T.: Arctic warming hotspot in the
northern Barents Sea linked to declining sea-ice import, Nat. Clim.
Change, 8, 634–639, https://doi.org/10.1038/s41558-018-0205-y, 2018. a
Liu, G., Qiu, S., Liu, B., Pu, Y., Gao, Z., Wang, J., Jin, R., and Zhou, J.:
Microbial reduction of Fe(III)-bearing clay minerals in the presence of
humic acids, Sci. Rep., 7, 45354, https://doi.org/10.1038/srep45354, 2017. a
Liu, S. M., Ye, X. W., Zhang, J., and Zhao, Y. F.: Problems with biogenic
silica measurement in marginal seas, Mar. Geol., 192, 383–392,
https://doi.org/10.1016/S0025-3227(02)00531-5, 2002. a
Liu, S. M., Zhang, J., and Li, R. X.: Ecological significance of biogenic
silica in the East China Sea, Mar. Ecol. Prog. Ser., 290, 15–26,
https://doi.org/10.3354/meps290015, 2005. a
Lomas, M. W., Baer, S. E., Acton, S., and Krause, J. W.: Pumped up by the
cold: Elemental quotas and stoichiometry of cold-water diatoms, Front. Mar.
Sci., 6, 286, https://doi.org/10.3389/fmars.2019.00286, 2019. a
Loucaides, S., van Cappellen, P., Roubeix, V., Moriceau, B., and Ragueneau, O.:
Controls on the Recycling and Preservation of Biogenic Silica from
Biomineralization to Burial, Silicon, 4, 7–22,
https://doi.org/10.1007/s12633-011-9092-9, 2012. a
Mackenzie, F. and Garrels, R.: Silicates: Reactivity with Sea Water, Science,
150, 57–58, https://doi.org/10.1126/science.150.3692.57, 1965. a
Mackenzie, F. T., Garrels, R. M., Bricker, O. P., and Bickley, F.: Silica in
sea water: Control by silica minerals, Science, 155, 1404–1405,
https://doi.org/10.1126/science.155.3768.1404, 1967. a
Mackin, J. E. and Aller, R. C.: Dissolved Al in sediments and waters of the
East China Sea: Implications for authigenic mineral formation, Geochim.
Cosmochim. Ac., 48, 281–297, https://doi.org/10.1016/0016-7037(84)90251-5, 1984. a
Makarevich, P. R., Larionov, V. V., Vodopyanova, V. V., Bulavina, A. S.,
Ishkulova, T. G., Venger, M. P., Pastukhov, I. A., and Vashchenko, A. V.:
Phytoplankton of the Barents Sea at the Polar Front in Spring, Oceanology,
61, 930–943, https://doi.org/10.1134/S0001437021060084, 2022. a
März, C., Meinhardt, A. K., Schnetger, B., and Brumsack, H. J.: Silica
diagenesis and benthic fluxes in the Arctic Ocean, Mar. Chem., 171, 1–9,
https://doi.org/10.1016/j.marchem.2015.02.003, 2015. a, b, c, d
McManus, J., Hammond, D. E., Berelson, W. M., Kilgore, T. E., DeMaster, D. J.,
Ragueneau, O. G., and Collier, R. W.: Early diagenesis of biogenic opal:
Dissolution rates, kinetics, and paleoceanographic implications, Deep-Sea Res. Pt.
II, 42, 871–903, https://doi.org/10.1016/0967-0645(95)00035-O, 1995. a, b, c
Michalopoulos, P. and Aller, R. C.: Early diagenesis of biogenic silica in the
Amazon delta: Alteration, authigenic clay formation, and storage, Geochim.
Cosmochim. Ac., 68, 1061–1085, https://doi.org/10.1016/j.gca.2003.07.018, 2004. a
Middelburg, J. J., Soetaert, K., and Herman, P. M.: Empirical relationships
for use in global diagenetic models, Deep-Sea Res. Pt. I, 44, 327–344,
https://doi.org/10.1016/S0967-0637(96)00101-X, 1997. a, b
Moriceau, B., Goutx, M., Guigue, C., Lee, C., Armstrong, R., Duflos, M.,
Tamburini, C., Charrière, B., and Ragueneau, O.: Si-C interactions
during degradation of the diatom Skeletonema marinoi, Deep-Sea Res. Pt. II, 56,
1381–1395, https://doi.org/10.1016/j.dsr2.2008.11.026, 2009. a
Morin, G. P., Vigier, N., and Verney-Carron, A.: Enhanced dissolution of
basaltic glass in brackish waters: Impact on biogeochemical cycles, Earth
Planet. Sc. Lett., 417, 1–8, https://doi.org/10.1016/j.epsl.2015.02.005, 2015. a, b
Natori, Y., Haneda, A., and Suzuki, Y.: Vertical and seasonal differences in
biogenic silica dissolution in natural seawater in Suruga Bay, Japan: Effects
of temperature and organic matter, Mar. Chem., 102, 230–241,
https://doi.org/10.1016/j.marchem.2006.04.007, 2006. a
Nelson, D. M. and Brzezinski, M. A.: Diatom growth and productivity in an
oligotropic midocean gyre: A 3-yr record from the Sargasso Sea near Bermuda,
Limnol. Oceanogr., 42, 473–486, https://doi.org/10.4319/lo.1997.42.3.0473, 1997. a, b
Neukermans, G., Oziel, L., and Babin, M.: Increased intrusion of warming
Atlantic water leads to rapid expansion of temperate phytoplankton in the
Arctic, Glob. Change Biol., 24, 2545–2553, https://doi.org/10.1111/gcb.14075, 2018. a, b, c, d
Ng, H. C., Cassarino, L., Pickering, R. A., Woodward, E. M. S., Hammond, S. J.,
and Hendry, K. R.: Sediment efflux of silicon on the Greenland margin and
implications for the marine silicon cycle, Earth Planet. Sc. Lett., 529, 115877,
https://doi.org/10.1016/j.epsl.2019.115877, 2020. a, b, c, d
Olli, K., Wexels Riser, C., Wassmann, P., Ratkova, T., Arashkevich, E., and
Pasternak, A.: Seasonal variation in vertical flux of biogenic matter in the
marginal ice zone and the central Barents Sea, J. Mar. Syst., 38, 189–204, https://doi.org/10.1016/S0924-7963(02)00177-X, 2002. a
Onarheim, I. H. and Årthun, M.: Toward an ice-free Barents Sea, Geophys.
Res. Lett., 44, 8387–8395, https://doi.org/10.1002/2017GL074304, 2017. a
Opfergelt, S., de Bournonville, G., Cardinal, D., André, L., Delstanche,
S., and Delvaux, B.: Impact of soil weathering degree on silicon isotopic
fractionation during adsorption onto iron oxides in basaltic ash soils,
Cameroon, Geochim. Cosmochim. Ac., 73, 7226–7240,
https://doi.org/10.1016/j.gca.2009.09.003, 2009. a
Orkney, A., Platt, T., Narayanaswamy, B. E., Kostakis, I., and Bouman, H. A.:
Bio-optical evidence for increasing Phaeocystis dominance in the Barents
Sea: Increasing Phaeocystis in Barents Sea, Philos. T. R. Soc. A,
378, 2181, https://doi.org/10.1098/rsta.2019.0357, 2020. a, b, c
Orsi, T. H. and Dunn, D. A.: Correlations between sound velocity and related
properties of glacio-marine sediments: Barents sea, Geo-Mar. Lett., 11,
79–83, https://doi.org/10.1007/BF02431033, 1991. a
Oziel, L., Sirven, J., and Gascard, J. C.: The Barents Sea frontal zones and
water masses variability (1980–2011), Ocean Sci., 12, 169–184,
https://doi.org/10.5194/os-12-169-2016, 2016. a, b, c
Oziel, L., Baudena, A., Ardyna, M., Massicotte, P., Randelhoff, A.,
Sallée, J. B., Ingvaldsen, R. B., Devred, E., and Babin, M.: Faster
Atlantic currents drive poleward expansion of temperate phytoplankton in the
Arctic Ocean, Nat. Commun., 11, 1705, https://doi.org/10.1038/s41467-020-15485-5, 2020. a
Pickering, R.: Silica Cycling at the Sediment Water Interface of Coastal
Systems, Ph.D. thesis, The University of South Alabama College of Arts and
Sciences, ISBN 9798662450950, 2020. a
Rabouille, C., Gaillard, J. F., Tréguer, P., and Vincendeau, M. A.:
Biogenic silica recycling in surficial sediments across the Polar Front of
the Southern Ocean (Indian Sector), Deep-Sea Res. Pt. II, 44, 1151–1176,
https://doi.org/10.1016/S0967-0645(96)00108-7, 1997. a, b, c
Ragueneau, O., Tréguer, P., Leynaert, A., Anderson, R. F., Brzezinski,
M. A., DeMaster, D. J., Dugdale, R. C., Dymond, J., Fischer, G.,
François, R., Heinze, C., Maier-Reimer, E.,
Martin-Jézéquel, V., Nelson, D. M., and Quéguiner, B.: A
review of the Si cycle in the modern ocean: Recent progress and missing gaps
in the application of biogenic opal as a paleoproductivity proxy, Glob.
Planet. Change, 26, 317–365, https://doi.org/10.1016/S0921-8181(00)00052-7, 2000. a, b, c
Ragueneau, O., Gallinari, M., Corrin, L., Grandel, S., Hall, P., Hauvespre, A.,
Lampitt, R. S., Rickert, D., Stahl, H., Tengberg, A., and Witbaard, R.: The
benthic silica cycle in the Northeast Atlantic: Annual mass balance,
seasonality, and importance of non-steady-state processes for the early
diagenesis of biogenic opal in deep-sea sediments, Prog. Oceanogr., 50,
171–200, https://doi.org/10.1016/S0079-6611(01)00053-2, 2001. a, b, c, d
Ragueneau, O., Regaudie-de Gioux, A., Moriceau, B., Gallinari, M.,
Vangriesheim, A., Baurand, F., and Khripounoff, A.: A benthic Si mass
balance on the Congo margin: Origin of the 4000 m DSi anomaly and
implications for the transfer of Si from land to ocean, Deep-Sea Res. Pt. II, 56,
2197–2207, https://doi.org/10.1016/j.dsr2.2009.04.003, 2009. a
Regnier, P., O'Kane, J., Steefel, C., and Vanderborght, J.: Modeling complex
multi-component reactive-transport systems: towards a simulation environment
based on the concept of a Knowledge Base, Appl. Math. Model., 26, 913–927,
https://doi.org/10.1016/S0307-904X(02)00047-1, 2002. a
Regnier, P., Jourabchi, P., and Slomp, C. P.: Reactive-transport modeling as a
technique for understanding coupled biogeochemical processes in surface and
subsurface environments, Neth. J. Geosci., 82, 5–18,
https://doi.org/10.1017/S0016774600022757, 2003. a
Reigstad, M., Wassmann, P., Wexels Riser, C., Øygarden, S., and Rey, F.:
Variations in hydrography, nutrients and chlorophyll a in the marginal
ice-zone and the central Barents Sea, J. Mar. Syst., 38, 9–29,
https://doi.org/10.1016/S0924-7963(02)00167-7, 2002. a
Rey, F.: Declining silicate concentrations in the Norwegian and Barents Seas,
ICES J. Mar. Sci., 69, 208–212, https://doi.org/10.1093/icesjms/fss007, 2012. a
Rickert, D., Schlüter, M., and Wallmann, K.: Dissolution kinetics of
biogenic silica from the water column to the sediments, Geochim. Cosmochim.
Ac., 66, 439–455, https://doi.org/10.1016/S0016-7037(01)00757-8, 2002. a
Rimstidt, J. D. and Barnes, H. L.: The kinetics of silica-water reactions,
Geochim. Cosmochim. Ac., 44, 1683–1699, https://doi.org/10.1016/0016-7037(80)90220-3,
1980. a
Roubeix, V., Becquevort, S., and Lancelot, C.: Influence of bacteria and
salinity on diatom biogenic silica dissolution in estuarine systems,
Biogeochemistry, 88, 47–62, https://doi.org/10.1007/s10533-008-9193-8, 2008. a
Rynearson, T. A., Richardson, K., Lampitt, R. S., Sieracki, M. E., Poulton,
A. J., Lyngsgaard, M. M., and Perry, M. J.: Major contribution of diatom
resting spores to vertical flux in the sub-polar North Atlantic, Deep-Sea Res. Pt.
I, 82, 60–71, https://doi.org/10.1016/j.dsr.2013.07.013, 2013. a
Sakshaug, E.: Biomass and productivity distributions and their variability in
the Barents Sea, ICES J. Mar. Sci., 54, 341–350,
https://doi.org/10.1006/jmsc.1996.0170, 1997. a, b
Schink, D. R., Guinasso, N. L., and Fanning, K. A.: Processes affecting the
concentration of silica at the sediment-water interface of the Atlantic
Ocean, J. Geophys. Res., 80, 3013–3031, https://doi.org/10.1029/jc080i021p03013,
1975. a
Shapiro, I., Colony, R., and Vinje, T.: April sea ice extent in the Barents
Sea, 1850–2001, Polar Res., 22, 5–10,
https://doi.org/10.1111/j.1751-8369.2003.tb00089.x, 2003. a
Siever, R.: Establishment of equilibrium between clays and sea water, Earth
Planet. Sc. Lett., 5, 106–110, https://doi.org/10.1016/s0012-821x(68)80023-8, 1968. a
Smedsrud, L. H., Esau, I., Ingvaldsen, R. B., Eldevik, T., Haugan, P. M., Li,
C., Lien, V. S., Olsen, A., Omar, A. M., Risebrobakken, B., Sandø, A. B.,
Semenov, V. A., and Sorokina, S. A.: The role of the Barents Sea in the
Arctic climate system, Rev. Geophys., 51, 415–449, https://doi.org/10.1002/rog.20017,
2013. a
Solan, M., Ward, E. R., Wood, C. L., Reed, A. J., Grange, L. J., and Godbold,
J. A.: Climate-driven benthic invertebrate activity and biogeochemical
functioning across the Barents Sea polar front: Climate driven benthic
activity, Philos. T. R. Soc. A, 378, 2181, https://doi.org/10.1098/rsta.2019.0365,
2020. a, b
Sun, X., Olofsson, M., Andersson, P. S., Fry, B., Legrand, C., Humborg, C., and
Mörth, C. M.: Effects of growth and dissolution on the fractionation
of silicon isotopes by estuarine diatoms, Geochim. Cosmochim. Ac., 130,
156–166, https://doi.org/10.1016/j.gca.2014.01.024, 2014. a
Sun, X., Mörth, C. M., Porcelli, D., Kutscher, L., Hirst, C., Murphy,
M. J., Maximov, T., Petrov, R. E., Humborg, C., Schmitt, M., and Andersson,
P. S.: Stable silicon isotopic compositions of the Lena River and its
tributaries: Implications for silicon delivery to the Arctic Ocean, Geochim.
Cosmochim. Ac., 241, 120–133, https://doi.org/10.1016/j.gca.2018.08.044, 2018. a
Syvertsen, E. E.: Ice algae in the Barents Sea: types of assemblages, origin,
fate and role in the ice-edge phytoplankton bloom, Polar Res., 10, 277–288,
https://doi.org/10.3402/polar.v10i1.6746, 1991. a
Thullner, M., Dale, A. W., and Regnier, P.: Global-scale quantification of
mineralization pathways in marine sediments: A reaction-transport modeling
approach, Geochem. Geophy. Geosy., 10, https://doi.org/10.1029/2009GC002484,
2009. a
Titov, O.: Seasonal Dynamics of Primary Production in the Barents Sea, in:
ICES CM 1995/Mini, Vol. 16, International'Council for the Exploration of the Sea, 1995. a
Torres-Valdés, S., Tsubouchi, T., Bacon, S., Naveira-Garabato, A. C.,
Sanders, R., McLaughlin, F. A., Petrie, B., Kattner, G., Azetsu-Scott, K.,
and Whitledge, T. E.: Export of nutrients from the Arctic Ocean, J.
Geophys. Res.-Ocean., 118, 1625–1644, https://doi.org/10.1002/jgrc.20063, 2013. a, b
Tréguer, P., Kamatani, A., Gueneley, S., and Quéguiner, B.:
Kinetics of dissolution of Antarctic diatom frustules and the biogeochemical
cycle of silicon in the Southern Ocean, Polar Biol., 9, 397–403,
https://doi.org/10.1007/BF00442531, 1989. a
Tréguer, P., Nelson, D. M., Van Bennekom, A. J., DeMaster, D. J.,
Leynaert, A., and Quéguiner, B.: The silica balance in the world
ocean: A reestimate, Science, 268, 375–379,
https://doi.org/10.1126/science.268.5209.375, 1995. a, b
Tréguer, P. J., Sutton, J. N., Brzezinski, M., Charette, M. A., Devries,
T., Dutkiewicz, S., Ehlert, C., Hawkings, J., Leynaert, A., Liu, S. M.,
Monferrer, N. L., López-Acosta, M., Maldonado, M., Rahman, S., Ran, L.,
and Rouxel, O.: Reviews and syntheses: The biogeochemical cycle of silicon
in the modern ocean, Biogeosciences, 18, 1269–1289,
https://doi.org/10.5194/bg-18-1269-2021, 2021. a
Turner, J. T.: Zooplankton fecal pellets, marine snow, phytodetritus and the
ocean's biological pump, Prog. Oceanogr., 130, 205–248,
https://doi.org/10.1016/j.pocean.2014.08.005, 2015. a
Van Beusekom, J. E., Van Bennekom, A. J., Tréguer, P., and Morvan,
J.: Aluminium and silicic acid in water and sediments of the Enderby and
Crozet Basins, Deep-Sea Res. Pt. II, 44, 987–1003,
https://doi.org/10.1016/S0967-0645(96)00105-1, 1997. a
Van Cappellen, P. and Qiu, L.: Biogenic silica dissolution in sediments of
the Southern Ocean, I. Solubility, Deep-Sea Res. Pt. II, 44, 1109–1128,
https://doi.org/10.1016/S0967-0645(96)00113-0, 1997a. a
Van Cappellen, P. and Qiu, L.: Biogenic silica dissolution in sediments of
the Southern Ocean. II. Kinetics, Deep-Sea Res. Pt. II, 44, 1129–1149,
https://doi.org/10.1016/S0967-0645(96)00112-9, 1997b. a, b
Van Cappellen, P., Dixit, S., and van Beusekom, J.: Biogenic silica
dissolution in the oceans: Reconciling experimental and field-based
dissolution rates, Global Biogeochem. Cy., 16, 23-1–23-10,
https://doi.org/10.1029/2001gb001431, 2002. a, b
Vandevivere, P., Welch, S. A., Ullman, W. J., and Kirchman, D. L.: Enhanced
dissolution of silicate minerals by bacteria at near-neutral pH, Microb.
Ecol., 27, 241–251, https://doi.org/10.1007/BF00182408, 1994. a
Varkouhi, S. and Wells, J.: The relation between temperature and silica
benthic exchange rates and implications for near-seabed formation of
diagenetic opal, Results Geophys. Sci., 1–4, 100002,
https://doi.org/10.1016/j.ringps.2020.100002, 2020. a
Vernet, M., Matrai, P. A., and Andreassen, I.: Synthesis of particulate and
extracellular carbon by phytoplankton at the marginal ice zone in the Barents
Sea, J. Geophys. Res.-Ocean., 103, 1023–1037, https://doi.org/10.1029/97jc02288,
1998. a
Vogt, C. and Knies, J.: Sediment pathways in the western Barents Sea inferred
from clay mineral assemblages in surface sediments, Nor. J. Geol., 89,
41–55, 2009. a
Vorhies, J. S. and Gaines, R. R.: Microbial dissolution of clay minerals as a
source of iron and silica in marine sediments, Nat. Geosci., 2, 221–225,
https://doi.org/10.1038/ngeo441, 2009. a
Wang, W., Wei, H. Z., Jiang, S. Y., Liu, X., Lei, F., Lin, Y. B., and Zhao, Y.:
Silicon isotope geochemistry: Fractionation linked to silicon complexations
and its geological applications, Molecules, 24, 1415,
https://doi.org/10.3390/molecules24071415, 2019. a
Ward, J., Hendry, K., Arndt, S., and Freitas, F. S.:
Biogeochemical Reaction Network Simulator (BRNS) for the Barents Sea benthic silica cycle, Zenodo [code], https://doi.org/10.5281/zenodo.6023767, 2021a. a
Ward, J., Freitas, F. S., Henley, S. F., and Faust, J. C.: Benthic silica flux magnitudes and silicon isotopic composition of marine sediment pore waters and solid phase leachates for the Barents Sea (summer 2017–2019), Polar Data Centre [dataset], https://doi.org/10.5285/8933af23-e051-4166-b63e-2155330a21d8, 2021b. a
Ward, J., Hendry, K., Arndt, S., Faust, J., Freitas, F., Henley, S. F., Krause,
J., Maerz, C., Ng, H. C., and Pickering, R.: Stable Silicon Isotopes Uncover
a Mineralogical Control on the Benthic Silicon Cycle in the Arctic Barents
Sea, Geochim. Cosmochim. Ac., 329, 206–230,
https://doi.org/10.1016/j.gca.2022.05.005, 2022. a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, aa, ab, ac, ad, ae, af, ag, ah
Wassmann, P. and Olli, K.: Central Barents Sea and Northern Spitsbergen, in:
The Organic Carbon Cycle in the Arctic Ocean, edited by: Stein, R. and
Macdonald, R. W., Springer, Berlin, 112–114,
https://doi.org/10.1007/978-3-642-18912-8_5, 2004.
a, b
Wassmann, P. and Reigstad, M.: Future Arctic Ocean seasonal ice zones and
implications for pelagic-benthic coupling, Oceanography, 24, 220–231,
https://doi.org/10.5670/oceanog.2011.74, 2011. a
Wassmann, P., Ratkova, T., Andreassen, I., Vernet, M., Pedersen, G., and Rey,
F.: Spring bloom development in the marginal ice zone and the central
Barents Sea, Mar. Ecol., 20, 321–346,
https://doi.org/10.1046/j.1439-0485.1999.2034081.x, 1999. a, b, c, d
Wassmann, P., Slagstad, D., Riser, C. W., and Reigstad, M.: Modelling the
ecosystem dynamics of the Barents Sea including the marginal ice zone: II.
Carbon flux and interannual variability, J. Mar. Syst., 59, 1–24,
https://doi.org/10.1016/j.jmarsys.2005.05.006, 2006. a
Westacott, S., Planavsky, N. J., Zhao, M. Y., and Hull, P. M.: Revisiting the
sedimentary record of the rise of diatoms, P. Natl. Acad. Sci. USA, 118,
https://doi.org/10.1073/pnas.2103517118, 2021. a
Wetzel, F., de Souza, G. F., and Reynolds, B. C.: What controls silicon
isotope fractionation during dissolution of diatom opal?, Geochim.
Cosmochim. Ac., 131, 128–137, https://doi.org/10.1016/j.gca.2014.01.028, 2014. a
Wiedmann, I., Ershova, E., Bluhm, B. A., Nöthig, E. M., Gradinger, R. R.,
Kosobokova, K., and Boetius, A.: What Feeds the Benthos in the Arctic
Basins? Assembling a Carbon Budget for the Deep Arctic Ocean, Front. Mar.
Sci., 7, https://doi.org/10.3389/fmars.2020.00224, 2020. a
Wu, B., Lu, C., and Liu, S. M.: Dynamics of biogenic silica dissolution in
Jiaozhou Bay, western Yellow Sea, Mar. Chem., 174, 58–66,
https://doi.org/10.1016/j.marchem.2015.05.004, 2015. a
Zaborska, A., Carroll, J. L., Papucci, C., Torricelli, L., Carroll, M. L.,
Walkusz-Miotk, J., and Pempkowiak, J.: Recent sediment accumulation rates
for the Western margin of the Barents Sea, Deep-Sea Res. Pt. II, 55, 2352–2360,
https://doi.org/10.1016/j.dsr2.2008.05.026, 2008. a, b, c
Zheng, X. Y., Beard, B. L., Reddy, T. R., Roden, E. E., and Johnson, C. M.:
Abiologic silicon isotope fractionation between aqueous Si and Fe(III)-Si
gel in simulated Archean seawater: Implications for Si isotope records in
Precambrian sedimentary rocks, Geochim. Cosmochim. Ac., 187, 102–122,
https://doi.org/10.1016/j.gca.2016.05.012, 2016. a
Ziegler, K., Chadwick, O. A., Brzezinski, M. A., and Kelly, E. F.: Natural
variations of δ30Si ratios during progressive basalt weathering,
Hawaiian Islands, Geochim. Cosmochim. Ac., 69, 4597–4610,
https://doi.org/10.1016/j.gca.2005.05.008, 2005a. a
Ziegler, K., Chadwick, O. A., White, A. F., and Brzezinski, M. A.:
δ30Si systematics in a granitic saprolite, Puerto Rico, Geology, 33,
817–820, https://doi.org/10.1130/G21707.1, 2005b. a
Short summary
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.
The seafloor plays an important role in the cycling of silicon (Si), a key nutrient that...
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