Articles | Volume 15, issue 10
https://doi.org/10.5194/bg-15-3071-2018
© Author(s) 2018. 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-15-3071-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 May 2018
Research article |
| 18 May 2018
| 18 May 2018
The role of diatom resting spores in pelagic–benthic coupling in the Southern Ocean
Mathieu Rembauville
Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Laboratoire
d'Océanographie Microbienne (LOMIC), Observatoire Océanologique,
66650 Banyuls-sur-mer, France
Stéphane Blain
Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Laboratoire
d'Océanographie Microbienne (LOMIC), Observatoire Océanologique,
66650 Banyuls-sur-mer, France
Clara Manno
British Antarctic Survey, Natural Environmental Research Council, High
Cross, Madingley Road, Cambridge, CB3 0ET, UK
Geraint Tarling
British Antarctic Survey, Natural Environmental Research Council, High
Cross, Madingley Road, Cambridge, CB3 0ET, UK
Anu Thompson
School of Environmental Sciences, 4 Brownlow Street, University of
Liverpool, Liverpool, L69 3GP, UK
George Wolff
School of Environmental Sciences, 4 Brownlow Street, University of
Liverpool, Liverpool, L69 3GP, UK
Ian Salter
CORRESPONDING AUTHOR
Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Laboratoire
d'Océanographie Microbienne (LOMIC), Observatoire Océanologique,
66650 Banyuls-sur-mer, France
Faroe Marine Research Institute, Box 3051, 110, Torshavn, Faroe Islands
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Evert de Froe, Igor Yashayaev, Christian Mohn, Johanne Vad, Furu Mienis, Gerard Duineveld, Ellen Kenchington, Erica Head, Steve W. Ross, Sabena Blackbird, George A. Wolff, J. Murray Roberts, Barry MacDonald, Graham Tulloch, and Dick van Oevelen
Biogeosciences, 21, 5407–5433, https://doi.org/10.5194/bg-21-5407-2024, https://doi.org/10.5194/bg-21-5407-2024, 2024
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Deep-sea sponge grounds are distributed globally and are considered hotspots of biological diversity and biogeochemical cycling. To date, little is known about the environmental constraints that control where deep-sea sponge grounds occur and what conditions favour high sponge biomass. Here, we characterize oceanographic conditions at two contrasting sponge grounds. Our results imply that sponges and associated fauna benefit from strong tidal currents and favourable regional ocean currents.
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.
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.
Roberta Johnson, Clara Manno, and Patrizia Ziveri
Biogeosciences Discuss., https://doi.org/10.5194/bg-2020-53, https://doi.org/10.5194/bg-2020-53, 2020
Revised manuscript not accepted
Bernd Wagner, Thomas Wilke, Alexander Francke, Christian Albrecht, Henrike Baumgarten, Adele Bertini, Nathalie Combourieu-Nebout, Aleksandra Cvetkoska, Michele D'Addabbo, Timme H. Donders, Kirstin Föller, Biagio Giaccio, Andon Grazhdani, Torsten Hauffe, Jens Holtvoeth, Sebastien Joannin, Elena Jovanovska, Janna Just, Katerina Kouli, Andreas Koutsodendris, Sebastian Krastel, Jack H. Lacey, Niklas Leicher, Melanie J. Leng, Zlatko Levkov, Katja Lindhorst, Alessia Masi, Anna M. Mercuri, Sebastien Nomade, Norbert Nowaczyk, Konstantinos Panagiotopoulos, Odile Peyron, Jane M. Reed, Eleonora Regattieri, Laura Sadori, Leonardo Sagnotti, Björn Stelbrink, Roberto Sulpizio, Slavica Tofilovska, Paola Torri, Hendrik Vogel, Thomas Wagner, Friederike Wagner-Cremer, George A. Wolff, Thomas Wonik, Giovanni Zanchetta, and Xiaosen S. Zhang
Biogeosciences, 14, 2033–2054, https://doi.org/10.5194/bg-14-2033-2017, https://doi.org/10.5194/bg-14-2033-2017, 2017
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Lake Ohrid is considered to be the oldest existing lake in Europe. Moreover, it has a very high degree of endemic biodiversity. During a drilling campaign at Lake Ohrid in 2013, a 569 m long sediment sequence was recovered from Lake Ohrid. The ongoing studies of this record provide first important information on the environmental and evolutionary history of the lake and the reasons for its high endimic biodiversity.
Anna Belcher, Clara Manno, Peter Ward, Stephanie A. Henson, Richard Sanders, and Geraint A. Tarling
Biogeosciences, 14, 1511–1525, https://doi.org/10.5194/bg-14-1511-2017, https://doi.org/10.5194/bg-14-1511-2017, 2017
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Faecal pellets (FPs) are a dominant part of the deep ocean carbon fluxes. We compare estimates of FP production, to measurements of FPs in the meso- and bathypelagic. Despite being produced in high numbers in the surface ocean, small FPs are not transferred efficiently to depth. Changes in FP morphology point to the repacking of surface FPs in the mesopelagic and in situ production at depth, highlighting the importance of deep zooplankton communities for the transfer of carbon to the deep ocean.
Angus Atkinson, Simeon L. Hill, Evgeny A. Pakhomov, Volker Siegel, Ricardo Anadon, Sanae Chiba, Kendra L. Daly, Rod Downie, Sophie Fielding, Peter Fretwell, Laura Gerrish, Graham W. Hosie, Mark J. Jessopp, So Kawaguchi, Bjørn A. Krafft, Valerie Loeb, Jun Nishikawa, Helen J. Peat, Christian S. Reiss, Robin M. Ross, Langdon B. Quetin, Katrin Schmidt, Deborah K. Steinberg, Roshni C. Subramaniam, Geraint A. Tarling, and Peter Ward
Earth Syst. Sci. Data, 9, 193–210, https://doi.org/10.5194/essd-9-193-2017, https://doi.org/10.5194/essd-9-193-2017, 2017
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KRILLBASE is a data rescue and compilation project to improve the availability of information on two key Southern Ocean zooplankton: Antarctic krill and salps. We provide a circumpolar database that combines 15 194 scientific net hauls (1926 to 2016) from 10 countries. These data provide a resource for analysing the distribution and abundance of krill and salps throughout the Southern Ocean to support ecological and biogeochemical research as well as fisheries management and conservation.
Ivia Closset, Damien Cardinal, Mathieu Rembauville, François Thil, and Stéphane Blain
Biogeosciences, 13, 6049–6066, https://doi.org/10.5194/bg-13-6049-2016, https://doi.org/10.5194/bg-13-6049-2016, 2016
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Isotopic measurements were used to investigate the seasonal evolution of the silicon (Si) biogeochemical cycle in a naturally iron-fertilized area of the Southern Ocean. When comparing data from early spring and summer periods, the relationship between Si depletion, biogenic silica production, and their isotopic composition appears decoupled in this region. Considering these results, we refined the seasonal net Si production that was mainly sustained by surface phytoplankton populations.
A. J. Cavagna, F. Fripiat, M. Elskens, P. Mangion, L. Chirurgien, I. Closset, M. Lasbleiz, L. Florez-Leiva, D. Cardinal, K. Leblanc, C. Fernandez, D. Lefèvre, L. Oriol, S. Blain, B. Quéguiner, and F. Dehairs
Biogeosciences, 12, 6515–6528, https://doi.org/10.5194/bg-12-6515-2015, https://doi.org/10.5194/bg-12-6515-2015, 2015
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Primary production, NO3- and NH4+ uptake, and nitrification rates were measured during the KEOPS 2 cruise (austral spring 2011) in the Kerguelen Plateau area. Natural iron fertilization stimulated primary production which is much higher in the fertilized areas compared to the HNLC site. We report high rates of nitrification in the mixed layer below the euphotic zone. We conclude that high productivity in deep mixing system stimulates the N cycle by increasing both assimilation and regeneration.
F. d'Ovidio, A. Della Penna, T. W. Trull, F. Nencioli, M.-I. Pujol, M.-H. Rio, Y.-H. Park, C. Cotté, M. Zhou, and S. Blain
Biogeosciences, 12, 5567–5581, https://doi.org/10.5194/bg-12-5567-2015, https://doi.org/10.5194/bg-12-5567-2015, 2015
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Field campaigns are instrumental in providing ground truth for understanding and modeling global ocean biogeochemical budgets. A survey however can only inspect a fraction of the global oceans, typically a region hundreds of kilometers wide for a temporal window of the order of (at most) several weeks. In this spatiotemporal domain, mesoscale variability can mask climatological contrasts. Here we propose the use of multisatellite-based Lagrangian diagnostics to solve this issue.
A. R. Bowie, P. van der Merwe, F. Quéroué, T. Trull, M. Fourquez, F. Planchon, G. Sarthou, F. Chever, A. T. Townsend, I. Obernosterer, J.-B. Sallée, and S. Blain
Biogeosciences, 12, 4421–4445, https://doi.org/10.5194/bg-12-4421-2015, https://doi.org/10.5194/bg-12-4421-2015, 2015
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Iron biogeochemical budgets during the natural ocean fertilisation experiment KEOPS-2 showed that complex circulation and transport pathways were responsible for differences in the mode and strength of iron supply, with vertical supply dominant on the plateau and lateral supply dominant in the plume. The exchange of iron between dissolved, biogenic and lithogenic pools was highly dynamic, resulting in a decoupling of iron supply and carbon export and controlling the efficiency of fertilization.
F. Quéroué, G. Sarthou, H. F. Planquette, E. Bucciarelli, F. Chever, P. van der Merwe, D. Lannuzel, A. T. Townsend, M. Cheize, S. Blain, F. d'Ovidio, and A. R. Bowie
Biogeosciences, 12, 3869–3883, https://doi.org/10.5194/bg-12-3869-2015, https://doi.org/10.5194/bg-12-3869-2015, 2015
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Dissolved Fe (dFe) concentrations were measured in the vicinity of the Kerguelen Islands. Direct island runoff, glacial melting, and resuspended sediments were identified as important inputs of dFe that could potentially fertilise the northern part of the plateau. Overall, heterogeneous sources of Fe over and off the plateau, in addition to strong variability in Fe supply by vertical or horizontal transport, may explain the high variability in dFe concentrations observed during this study.
M. Rembauville, I. Salter, N. Leblond, A. Gueneugues, and S. Blain
Biogeosciences, 12, 3153–3170, https://doi.org/10.5194/bg-12-3153-2015, https://doi.org/10.5194/bg-12-3153-2015, 2015
M. Rembauville, S. Blain, L. Armand, B. Quéguiner, and I. Salter
Biogeosciences, 12, 3171–3195, https://doi.org/10.5194/bg-12-3171-2015, https://doi.org/10.5194/bg-12-3171-2015, 2015
I. Obernosterer, M. Fourquez, and S. Blain
Biogeosciences, 12, 1983–1992, https://doi.org/10.5194/bg-12-1983-2015, https://doi.org/10.5194/bg-12-1983-2015, 2015
C. Manno, G. Stowasser, P. Enderlein, S. Fielding, and G. A. Tarling
Biogeosciences, 12, 1955–1965, https://doi.org/10.5194/bg-12-1955-2015, https://doi.org/10.5194/bg-12-1955-2015, 2015
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In the Scotia Sea, the zooplankton community shifting from a herbivorous to omnivorous diet strongly influences the chance of faecal pellets to reach the bottom. Faecal pellet flux was mainly a product of the vertically migrating and deeper-dwelling zooplankton in the iron-fertilized and iron-limited region respectively. The results demonstrate that the behaviour of the zooplankton community plays a critical role in controlling the quantity and quality of carbon exported in this area.
M. Fourquez, I. Obernosterer, D. M. Davies, T. W. Trull, and S. Blain
Biogeosciences, 12, 1893–1906, https://doi.org/10.5194/bg-12-1893-2015, https://doi.org/10.5194/bg-12-1893-2015, 2015
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In this manuscript, we present the results of iron uptake measured in the naturally iron-fertilized area during the Kerguelen Ocean and Plateau compared Study 2 cruise (KEOPS2). Iron uptake by bulk community and several size fractions (microplankton, pico-nanoplankton and bacteria) are presented, compared and discussed in the present paper. This work also presents first investigations on the potential competition between bacteria and phytoplankton for access to iron.
V. Sanial, P. van Beek, B. Lansard, M. Souhaut, E. Kestenare, F. d'Ovidio, M. Zhou, and S. Blain
Biogeosciences, 12, 1415–1430, https://doi.org/10.5194/bg-12-1415-2015, https://doi.org/10.5194/bg-12-1415-2015, 2015
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We investigated the origin and mechanisms of the natural iron fertilization that sustains a phytoplankton bloom downstream of the Kerguelen Islands. We used radium isotopes to trace the fate of shelf waters that may transport iron and other micronutrients towards offshore waters. We show that shelf waters are rapidly transferred offshore and may be transported across the polar front (PF). The PF may thus not be a strong physical barrier for chemical elements released by the shelf sediments.
T. W. Trull, D. M. Davies, F. Dehairs, A.-J. Cavagna, M. Lasbleiz, E. C. Laurenceau-Cornec, F. d'Ovidio, F. Planchon, K. Leblanc, B. Quéguiner, and S. Blain
Biogeosciences, 12, 1029–1056, https://doi.org/10.5194/bg-12-1029-2015, https://doi.org/10.5194/bg-12-1029-2015, 2015
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The KEOPS2 oceanographic study surveyed more than 30 sites downstream from the Kerguelen Islands in the Southern Ocean to examine the degree of variation in phytoplankton community responses to natural iron inputs. Our observations of community structure based on the chemical compositions of six microbial size fractions suggest that early spring trophodynamic and export responses differed between regions with persistently low levels versus punctually high levels of iron fertilisation.
E. C. Laurenceau-Cornec, T. W. Trull, D. M. Davies, S. G. Bray, J. Doran, F. Planchon, F. Carlotti, M.-P. Jouandet, A.-J. Cavagna, A. M. Waite, and S. Blain
Biogeosciences, 12, 1007–1027, https://doi.org/10.5194/bg-12-1007-2015, https://doi.org/10.5194/bg-12-1007-2015, 2015
P. van der Merwe, A. R. Bowie, F. Quéroué, L. Armand, S. Blain, F. Chever, D. Davies, F. Dehairs, F. Planchon, G. Sarthou, A. T. Townsend, and T. W. Trull
Biogeosciences, 12, 739–755, https://doi.org/10.5194/bg-12-739-2015, https://doi.org/10.5194/bg-12-739-2015, 2015
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Trace metal analysis of suspended and settling particles and underlying sediment was undertaken to elucidate the source to sink progression of the particulate trace metal pool near Kerguelen Island (Southern Ocean). Findings indicate that the Kerguelen Plateau is a source of trace metals via resuspended shelf sediments, especially below the mixed layer. However, glacial/fluvial runoff into shallow coastal waters is an important mode of fertilisation to areas downstream of Kerguelen Island.
S. Blain, J. Capparos, A. Guéneuguès, I. Obernosterer, and L. Oriol
Biogeosciences, 12, 623–635, https://doi.org/10.5194/bg-12-623-2015, https://doi.org/10.5194/bg-12-623-2015, 2015
U. Christaki, D. Lefèvre, C. Georges, J. Colombet, P. Catala, C. Courties, T. Sime-Ngando, S. Blain, and I. Obernosterer
Biogeosciences, 11, 6739–6753, https://doi.org/10.5194/bg-11-6739-2014, https://doi.org/10.5194/bg-11-6739-2014, 2014
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The concurrent investigation of several parameters has provided insight into two key roles of heterotrophic bacteria, and the microbial food web functioning, at the onset and late phase of the spring phytoplankton bloom induced by natural iron fertilization in the Southern Ocean.
M. Lasbleiz, K. Leblanc, S. Blain, J. Ras, V. Cornet-Barthaux, S. Hélias Nunige, and B. Quéguiner
Biogeosciences, 11, 5931–5955, https://doi.org/10.5194/bg-11-5931-2014, https://doi.org/10.5194/bg-11-5931-2014, 2014
M.-P. Jouandet, G. A. Jackson, F. Carlotti, M. Picheral, L. Stemmann, and S. Blain
Biogeosciences, 11, 4393–4406, https://doi.org/10.5194/bg-11-4393-2014, https://doi.org/10.5194/bg-11-4393-2014, 2014
M. Zhou, Y. Zhu, F. d'Ovidio, Y.-H. Park, I. Durand, E. Kestenare, V. Sanial, P. Van-Beek, B. Queguiner, F. Carlotti, and S. Blain
Biogeosciences Discuss., https://doi.org/10.5194/bgd-11-6845-2014, https://doi.org/10.5194/bgd-11-6845-2014, 2014
Revised manuscript has not been submitted
C. Guinet, X. Xing, E. Walker, P. Monestiez, S. Marchand, B. Picard, T. Jaud, M. Authier, C. Cotté, A. C. Dragon, E. Diamond, D. Antoine, P. Lovell, S. Blain, F. D'Ortenzio, and H. Claustre
Earth Syst. Sci. Data, 5, 15–29, https://doi.org/10.5194/essd-5-15-2013, https://doi.org/10.5194/essd-5-15-2013, 2013
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Biogeosciences, 21, 5233–5246, https://doi.org/10.5194/bg-21-5233-2024, https://doi.org/10.5194/bg-21-5233-2024, 2024
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Hydrothermally derived iron can be transported kilometers away from deep-sea vents, representing a significant flux of vital micronutrients to the ocean. However, the mechanisms that support the stabilization of dissolved iron remain elusive. Using electrochemical, spectrometry, and genomic methods, we demonstrated that strong ligands exert an important control on iron in plumes, and high-affinity iron-binding siderophores were identified in several hydrothermal plume samples for the first time.
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Biogeosciences, 21, 5131–5141, https://doi.org/10.5194/bg-21-5131-2024, https://doi.org/10.5194/bg-21-5131-2024, 2024
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Ocean liming is a technique proposed to mitigate ocean acidification. Every action we take has an impact on the environment and the effects on the invisible world are often overlooked. With this study, we show that lime addition impacts the dynamics of dissolved organic matter, one of the largest reservoirs of carbon on Earth, representing the main source of energy for marine microbes. Further studies to assess the impacts on marine ecosystems are therefore crucial before taking any action.
Mak A. Saito, Jaclyn K. Saunders, Matthew R. McIlvin, Erin M. Bertrand, John A. Breier, Margaret Mars Brisbin, Sophie M. Colston, Jaimee R. Compton, Tim J. Griffin, W. Judson Hervey, Robert L. Hettich, Pratik D. Jagtap, Michael Janech, Rod Johnson, Rick Keil, Hugo Kleikamp, Dagmar Leary, Lennart Martens, J. Scott P. McCain, Eli Moore, Subina Mehta, Dawn M. Moran, Jaqui Neibauer, Benjamin A. Neely, Michael V. Jakuba, Jim Johnson, Megan Duffy, Gerhard J. Herndl, Richard Giannone, Ryan Mueller, Brook L. Nunn, Martin Pabst, Samantha Peters, Andrew Rajczewski, Elden Rowland, Brian Searle, Tim Van Den Bossche, Gary J. Vora, Jacob R. Waldbauer, Haiyan Zheng, and Zihao Zhao
Biogeosciences, 21, 4889–4908, https://doi.org/10.5194/bg-21-4889-2024, https://doi.org/10.5194/bg-21-4889-2024, 2024
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The ability to assess the functional capabilities of microbes in the environment is of increasing interest. Metaproteomics, the ability to measure proteins across microbial populations, has been increasing in capability and popularity in recent years. Here, an international team of scientists conducted an intercomparison study using samples collected from the North Atlantic Ocean and observed consistency in the peptides and proteins identified, their functions, and their taxonomic origins.
Devika Varma, Laura Villanueva, Nicole J. Bale, Pierre Offre, Gert-Jan Reichart, and Stefan Schouten
Biogeosciences, 21, 4875–4888, https://doi.org/10.5194/bg-21-4875-2024, https://doi.org/10.5194/bg-21-4875-2024, 2024
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Archaeal hydroxylated tetraether lipids are increasingly used as temperature indicators in marine settings, but the factors influencing their distribution are still unclear. Analyzing membrane lipids of two thaumarchaeotal strains showed that the growth phase of the cultures does not affect the lipid distribution, but growth temperature profoundly affects the degree of cyclization of these lipids. Also, the abundance of these lipids is species-specific and is not influenced by temperature.
William Kew, Allison Myers-Pigg, Christine H. Chang, Sean M. Colby, Josie Eder, Malak M. Tfaily, Jeffrey Hawkes, Rosalie K. Chu, and James C. Stegen
Biogeosciences, 21, 4665–4679, https://doi.org/10.5194/bg-21-4665-2024, https://doi.org/10.5194/bg-21-4665-2024, 2024
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Natural organic matter (NOM) is often studied via Fourier transform mass spectrometry (FTMS), which identifies organic molecules as mass spectra peaks. The intensity of peaks is data that is often discarded due to technical concerns. We review the theory behind these concerns and show they are supported empirically. However, simulations show that ecological analyses of NOM data that include FTMS peak intensities are often valid. This opens a path for robust use of FTMS peak intensities for NOM.
Adam J. Fagan, Tatsuro Tanioka, Alyse A. Larkin, Jenna A. Lee, Nathan S. Garcia, and Adam C. Martiny
Biogeosciences, 21, 4239–4250, https://doi.org/10.5194/bg-21-4239-2024, https://doi.org/10.5194/bg-21-4239-2024, 2024
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Climate change is anticipated to influence the biological pump by altering phytoplankton nutrient distribution. In our research, we collected measurements of particulate matter concentrations during two oceanographic field studies. We observed systematic variations in organic matter concentrations and ratios across the Atlantic Ocean. From statistical modeling, we determined that these variations are associated with differences in the availability of essential nutrients for phytoplankton growth.
Sebastian I. Cantarero, Edgart Flores, Harry Allbrook, Paulina Aguayo, Cristian A. Vargas, John E. Tamanaha, J. Bentley C. Scholz, Lennart T. Bach, Carolin R. Löscher, Ulf Riebesell, Balaji Rajagopalan, Nadia Dildar, and Julio Sepúlveda
Biogeosciences, 21, 3927–3958, https://doi.org/10.5194/bg-21-3927-2024, https://doi.org/10.5194/bg-21-3927-2024, 2024
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Our study explores lipid remodeling in response to environmental stress, specifically how cell membrane chemistry changes. We focus on intact polar lipids in a phytoplankton community exposed to diverse stressors in a mesocosm experiment. The observed remodeling indicates acyl chain recycling for energy storage in intact polar lipids during stress, reallocating resources based on varying growth conditions. This understanding is essential to grasp the system's impact on cellular pools.
Mengke Wang, Peng Zhang, Huishan Li, Guisen Deng, Deliang Kong, Sifang Kong, and Junjian Wang
Biogeosciences, 21, 2691–2704, https://doi.org/10.5194/bg-21-2691-2024, https://doi.org/10.5194/bg-21-2691-2024, 2024
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We developed and applied complementary analyses to characterize molecular-level carbon traits for water-grown and soil-grown fine roots. The adaptive strategy of developing more labile carbon in water-grown roots accelerated root decomposition and counteracted the decelerated effects of anoxia on decomposition, highlighting an indirect effect of environmental change on belowground carbon cycling.
Maria G. Digernes, Yasemin V. Bodur, Martí Amargant-Arumí, Oliver Müller, Jeffrey A. Hawkes, Stephen G. Kohler, Ulrike Dietrich, Marit Reigstad, and Maria Lund Paulsen
EGUsphere, https://doi.org/10.5194/egusphere-2024-1314, https://doi.org/10.5194/egusphere-2024-1314, 2024
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Dissolved (DOM) and particulate organic matter (POM) are in constant exchange, but usually studied as distinct entities. We investigated the dynamics between POM and DOM in a sub-Arctic fjord across different seasons by conducting bi-monthly aggregation-dissolution experiments. During the productive period, POM concentrations increased in the experiment while DOM molecules became more recalcitrant. During the winter period, POM concentrations decreased whereas DOM molecules became more labile.
Zhe-Xuan Zhang, Edith Parlanti, Christelle Anquetil, Jérôme Morelle, Anniet M. Laverman, Alexandre Thibault, Elisa Bou, and Arnaud Huguet
Biogeosciences, 21, 2227–2252, https://doi.org/10.5194/bg-21-2227-2024, https://doi.org/10.5194/bg-21-2227-2024, 2024
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Bacterial tetraethers have important implications for palaeoclimate reconstruction. However, fundamental understanding of how these lipids are transformed from land to sea and which environmental factors influence their distributions is lacking. Here, we investigate the sources of brGDGTs and brGMGTs and the factors controlling their distributions in a large dataset (n=237). We propose a novel proxy (RIX) to trace riverine runoff, which is applicable in modern systems and in paleorecord.
Youcheng Bai, Marie-Alexandrine Sicre, Jian Ren, Vincent Klein, Haiyan Jin, and Jianfang Chen
Biogeosciences, 21, 689–709, https://doi.org/10.5194/bg-21-689-2024, https://doi.org/10.5194/bg-21-689-2024, 2024
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Algal biomarkers were used to assess sea ice and pelagic algal production across the western Arctic Ocean with changing sea-ice conditions. They show three distinct areas along with a marked latitudinal gradient of sea ice over pelagic algal production in surface sediments that are reflected by the H-Print index. Our data also show that efficient grazing consumption accounted for the dramatic decrease of diatom-derived biomarkers in sediments compared to that of particulate matter.
Hanxiao Wang, Zhifei Liu, Jiaying Li, Baozhi Lin, Yulong Zhao, Xiaodong Zhang, Junyuan Cao, Jingwen Zhang, Hongzhe Song, and Wenzhuo Wang
Biogeosciences, 20, 5109–5123, https://doi.org/10.5194/bg-20-5109-2023, https://doi.org/10.5194/bg-20-5109-2023, 2023
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The sinking of zooplankton fecal pellets is a key process in the marine biological carbon pump. This study presents carbon export of four shapes of fecal pellets from two time-series sediment traps in the South China Sea. The results show that the sinking fate of fecal pellets is regulated by marine primary productivity, deep-dwelling zooplankton community, and deep-sea currents in the tropical marginal sea, thus providing a new perspective for exploring the carbon cycle in the world ocean.
Rebecca J. Chmiel, Riss M. Kell, Deepa Rao, Dawn M. Moran, Giacomo R. DiTullio, and Mak A. Saito
Biogeosciences, 20, 3997–4027, https://doi.org/10.5194/bg-20-3997-2023, https://doi.org/10.5194/bg-20-3997-2023, 2023
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Cobalt is an important micronutrient for plankton, yet it is often scarce throughout the oceans. A 2017/2018 expedition to coastal Antarctica, including regions of the Amundsen Sea and the Ross Sea, discovered lower concentrations of cobalt compared to two past expeditions in 2005 and 2006, particularly for the type of cobalt preferred as a nutrient by phytoplankton. This loss may be due to changing inputs of other nutrients, causing higher uptake of cobalt by plankton over the last decade.
Emily B. Graham, Hyun-Seob Song, Samantha Grieger, Vanessa A. Garayburu-Caruso, James C. Stegen, Kevin D. Bladon, and Allison N. Myers-Pigg
Biogeosciences, 20, 3449–3457, https://doi.org/10.5194/bg-20-3449-2023, https://doi.org/10.5194/bg-20-3449-2023, 2023
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Intensifying wildfires are increasing pyrogenic organic matter (PyOM) production and its impact on water quality. Recent work indicates that PyOM may have a greater impact on aquatic biogeochemistry than previously assumed, driven by higher bioavailability. We provide a full assessment of the potential bioavailability of PyOM across its chemical spectrum. We indicate that PyOM can be actively transformed within the river corridor and, therefore, may be a growing source of riverine C emissions.
Nora Richter, Ellen C. Hopmans, Danica Mitrović, Pedro M. Raposeiro, Vítor Gonçalves, Ana C. Costa, Linda A. Amaral-Zettler, Laura Villanueva, and Darci Rush
Biogeosciences, 20, 2065–2098, https://doi.org/10.5194/bg-20-2065-2023, https://doi.org/10.5194/bg-20-2065-2023, 2023
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Bacteriohopanepolyols (BHPs) are a diverse class of lipids produced by bacteria across a wide range of environments. This study characterizes the diversity of BHPs in lakes and coastal lagoons in the Azores Archipelago, as well as a co-culture enriched for methanotrophs. We highlight the potential of BHPs as taxonomic markers for bacteria associated with certain ecological niches, which can be preserved in sedimentary records.
Andrea Scheibe, Carlos A. Sierra, and Marie Spohn
Biogeosciences, 20, 827–838, https://doi.org/10.5194/bg-20-827-2023, https://doi.org/10.5194/bg-20-827-2023, 2023
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We explored carbon cycling in soils in three climate zones in Chile down to a depth of 6 m, using carbon isotopes. Our results show that microbial activity several meters below the soil surface is mostly fueled by recently fixed carbon and that strong decomposition of soil organic matter only occurs in the upper decimeters of the soils. The study shows that different layers of the critical zone are tightly connected and that processes in the deep soil depend on recently fixed carbon.
Melissa Sophia Schwab, Hannah Gies, Chantal Valérie Freymond, Maarten Lupker, Negar Haghipour, and Timothy Ian Eglinton
Biogeosciences, 19, 5591–5616, https://doi.org/10.5194/bg-19-5591-2022, https://doi.org/10.5194/bg-19-5591-2022, 2022
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The majority of river studies focus on headwater or floodplain systems, while often neglecting intermediate river segments. Our study on the subalpine Sihl River bridges the gap between streams and lowlands and demonstrates that moderately steep river segments are areas of significant instream alterations, modulating the export of organic carbon over short distances.
Lisa Noll, Shasha Zhang, Qing Zheng, Yuntao Hu, Florian Hofhansl, and Wolfgang Wanek
Biogeosciences, 19, 5419–5433, https://doi.org/10.5194/bg-19-5419-2022, https://doi.org/10.5194/bg-19-5419-2022, 2022
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Cleavage of proteins to smaller nitrogen compounds allows microorganisms and plants to exploit the largest nitrogen reservoir in soils and is considered the bottleneck in soil organic nitrogen cycling. Results from soils covering a European transect show that protein turnover is constrained by soil geochemistry, shifts in climate and associated alterations in soil weathering and should be considered as a driver of soil nitrogen availability with repercussions on carbon cycle processes.
Muhammed Fatih Sert, Helge Niemann, Eoghan P. Reeves, Mats A. Granskog, Kevin P. Hand, Timo Kekäläinen, Janne Jänis, Pamela E. Rossel, Bénédicte Ferré, Anna Silyakova, and Friederike Gründger
Biogeosciences, 19, 2101–2120, https://doi.org/10.5194/bg-19-2101-2022, https://doi.org/10.5194/bg-19-2101-2022, 2022
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We investigate organic matter composition in the Arctic Ocean water column. We collected seawater samples from sea ice to deep waters at six vertical profiles near an active hydrothermal vent and its plume. In comparison to seawater, we found that the organic matter in waters directly affected by the hydrothermal plume had different chemical composition. We suggest that hydrothermal processes may influence the organic matter distribution in the deep ocean.
Charlotte Haugk, Loeka L. Jongejans, Kai Mangelsdorf, Matthias Fuchs, Olga Ogneva, Juri Palmtag, Gesine Mollenhauer, Paul J. Mann, P. Paul Overduin, Guido Grosse, Tina Sanders, Robyn E. Tuerena, Lutz Schirrmeister, Sebastian Wetterich, Alexander Kizyakov, Cornelia Karger, and Jens Strauss
Biogeosciences, 19, 2079–2094, https://doi.org/10.5194/bg-19-2079-2022, https://doi.org/10.5194/bg-19-2079-2022, 2022
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Buried animal and plant remains (carbon) from the last ice age were freeze-locked in permafrost. At an extremely fast eroding permafrost cliff in the Lena Delta (Siberia), we found this formerly frozen carbon well preserved. Our results show that ongoing degradation releases substantial amounts of this carbon, making it available for future carbon emissions. This mobilisation at the studied cliff and also similarly eroding sites bear the potential to affect rivers and oceans negatively.
Aleksandar I. Goranov, Andrew S. Wozniak, Kyle W. Bostick, Andrew R. Zimmerman, Siddhartha Mitra, and Patrick G. Hatcher
Biogeosciences, 19, 1491–1514, https://doi.org/10.5194/bg-19-1491-2022, https://doi.org/10.5194/bg-19-1491-2022, 2022
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Wildfire-derived molecules are ubiquitous in the aquatic environment, but their biological fate remains understudied. We have evaluated the compositional changes that occur to wildfire-derived molecules after incubation with soil microbes. We observe a significant degradation but also a production of numerous new labile molecules. Our results indicate that wildfire-derived molecules can be broken down and the carbon and nitrogen therein can be incorporated into microbial food webs.
Edgart Flores, Sebastian I. Cantarero, Paula Ruiz-Fernández, Nadia Dildar, Matthias Zabel, Osvaldo Ulloa, and Julio Sepúlveda
Biogeosciences, 19, 1395–1420, https://doi.org/10.5194/bg-19-1395-2022, https://doi.org/10.5194/bg-19-1395-2022, 2022
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In this study, we investigate the chemical diversity and abundance of microbial lipids as markers of organic matter sources in the deepest points of the Atacama Trench sediments and compare them to similar lipid stocks in shallower surface sediments and in the overlying water column. We evaluate possible organic matter provenance and some potential chemical adaptations of the in situ microbial community to the extreme conditions of high hydrostatic pressure in hadal realm.
Birgit Gaye, Niko Lahajnar, Natalie Harms, Sophie Anna Luise Paul, Tim Rixen, and Kay-Christian Emeis
Biogeosciences, 19, 807–830, https://doi.org/10.5194/bg-19-807-2022, https://doi.org/10.5194/bg-19-807-2022, 2022
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Amino acids were analyzed in a large number of samples of particulate and dissolved organic matter from coastal regions and the open ocean. A statistical analysis produced two new biogeochemical indicators. An indicator of sinking particle and sediment degradation (SDI) traces the degradation of organic matter from the surface waters into the sediments. A second indicator shows the residence time of suspended matter in the ocean (RTI).
Zoë R. van Kemenade, Laura Villanueva, Ellen C. Hopmans, Peter Kraal, Harry J. Witte, Jaap S. Sinninghe Damsté, and Darci Rush
Biogeosciences, 19, 201–221, https://doi.org/10.5194/bg-19-201-2022, https://doi.org/10.5194/bg-19-201-2022, 2022
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Anaerobic ammonium oxidation (anammox) is an important nitrogen-removal process in the ocean. We assess the distribution of bacteriohopanetetrol-x (BHT-x), used to trace past anammox, along a redox gradient in the water column of the Benguela upwelling system. BHT-x / BHT ratios of >0.18 correspond to the presence of living anammox bacteria and oxygen levels <50 μmol L−1. This allows for a more robust application of BHT-x to trace past marine anammox and deoxygenation in dynamic marine systems.
Jia-Jang Hung, Ching-Han Tung, Zong-Ying Lin, Yuh-ling Lee Chen, Shao-Hung Peng, Yen-Huei Lin, and Li-Shan Tsai
Biogeosciences, 18, 5141–5162, https://doi.org/10.5194/bg-18-5141-2021, https://doi.org/10.5194/bg-18-5141-2021, 2021
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We report measured active and passive fluxes and their controlling mechanisms in the northern South China Sea (NSCS). The total fluxes were higher than most reports in open oceans, indicating the significance of NSCS in atmospheric CO2 uptake and in storing that CO2 in the ocean’s interior. Winter cooling and extreme events enhanced nutrient availability and elevated fluxes. Global warming may have profound impacts on reducing ocean’s uptake and storage of CO2 in subtropical–tropical oceans.
Jens Daniel Müller, Bernd Schneider, Ulf Gräwe, Peer Fietzek, Marcus Bo Wallin, Anna Rutgersson, Norbert Wasmund, Siegfried Krüger, and Gregor Rehder
Biogeosciences, 18, 4889–4917, https://doi.org/10.5194/bg-18-4889-2021, https://doi.org/10.5194/bg-18-4889-2021, 2021
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Based on profiling pCO2 measurements from a field campaign, we quantify the biomass production of a cyanobacteria bloom in the Baltic Sea, the export of which would foster deep water deoxygenation. We further demonstrate how this biomass production can be accurately reconstructed from long-term surface measurements made on cargo vessels in combination with modelled temperature profiles. This approach enables a better understanding of a severe concern for the Baltic’s good environmental status.
Alexander Braun, Marina Spona-Friedl, Maria Avramov, Martin Elsner, Federico Baltar, Thomas Reinthaler, Gerhard J. Herndl, and Christian Griebler
Biogeosciences, 18, 3689–3700, https://doi.org/10.5194/bg-18-3689-2021, https://doi.org/10.5194/bg-18-3689-2021, 2021
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It is known that CO2 fixation by photoautotrophic organisms is the major sink from the atmosphere. While biologists are aware that CO2 fixation also occurs in heterotrophic organisms, this route of inorganic carbon, and its quantitative role, is hardly recognized in biogeochemistry. We demonstrate that a considerable amount of CO2 is fixed annually through anaplerotic reactions in heterotrophic organisms, and a significant quantity of inorganic carbon is temporally sequestered in biomass.
Jonathan H. Raberg, David J. Harning, Sarah E. Crump, Greg de Wet, Aria Blumm, Sebastian Kopf, Áslaug Geirsdóttir, Gifford H. Miller, and Julio Sepúlveda
Biogeosciences, 18, 3579–3603, https://doi.org/10.5194/bg-18-3579-2021, https://doi.org/10.5194/bg-18-3579-2021, 2021
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BrGDGT lipids are a proxy for temperature in lake sediments, but other parameters like pH can influence them, and seasonality can affect the temperatures they record. We find a warm-season bias at 43 new high-latitude sites. We also present a new method that deconvolves the effects of temperature, pH, and conductivity and generate global calibrations for these variables. Our study provides new paleoclimate tools, insight into brGDGTs at the biochemical level, and a new method for future study.
Charlotte L. Spencer-Jones, Erin L. McClymont, Nicole J. Bale, Ellen C. Hopmans, Stefan Schouten, Juliane Müller, E. Povl Abrahamsen, Claire Allen, Torsten Bickert, Claus-Dieter Hillenbrand, Elaine Mawbey, Victoria Peck, Aleksandra Svalova, and James A. Smith
Biogeosciences, 18, 3485–3504, https://doi.org/10.5194/bg-18-3485-2021, https://doi.org/10.5194/bg-18-3485-2021, 2021
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Long-term ocean temperature records are needed to fully understand the impact of West Antarctic Ice Sheet collapse. Glycerol dialkyl glycerol tetraethers (GDGTs) are powerful tools for reconstructing ocean temperature but can be difficult to apply to the Southern Ocean. Our results show active GDGT synthesis in relatively warm depths of the ocean. This research improves the application of GDGT palaeoceanographic proxies in the Southern Ocean.
Alec W. Armstrong, Leanne Powers, and Michael Gonsior
Biogeosciences, 18, 3367–3390, https://doi.org/10.5194/bg-18-3367-2021, https://doi.org/10.5194/bg-18-3367-2021, 2021
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Living things decay into organic matter, which can dissolve into water (like tea brewing). Tea receives its color by absorbing light. Similarly, this material absorbs light, which can then cause chemical reactions that change it. By measuring changes in these optical properties, we found that materials from some places are more sensitive to light than others. Comparing sensitivity to light helps us understand where these materials come from and what happens as they move through water.
Ben J. Fisher, Johan C. Faust, Oliver W. Moore, Caroline L. Peacock, and Christian März
Biogeosciences, 18, 3409–3419, https://doi.org/10.5194/bg-18-3409-2021, https://doi.org/10.5194/bg-18-3409-2021, 2021
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Organic carbon can be protected from microbial degradation in marine sediments through association with iron minerals on 1000-year timescales. Despite the importance of this carbon sink, our spatial and temporal understanding of iron-bound organic carbon interactions globally is poor. Here we show that caution must be applied when comparing quantification of iron-bound organic carbon extracted by different methods as the extraction strength and method specificity can be highly variable.
Mark A. Stevenson, Suzanne McGowan, Emma J. Pearson, George E. A. Swann, Melanie J. Leng, Vivienne J. Jones, Joseph J. Bailey, Xianyu Huang, and Erika Whiteford
Biogeosciences, 18, 2465–2485, https://doi.org/10.5194/bg-18-2465-2021, https://doi.org/10.5194/bg-18-2465-2021, 2021
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We link detailed stable isotope and biomarker analyses from the catchments of three Arctic upland lakes on Disko Island (West Greenland) to a recent dated sediment core to understand how carbon cycling has changed over the past ~500 years. We find that the carbon deposited in sediments in these upland lakes is predominately sourced from in-lake production due to the catchment's limited terrestrial vegetation and elevation and that recent increases in algal production link with climate change.
Nadine T. Smit, Laura Villanueva, Darci Rush, Fausto Grassa, Caitlyn R. Witkowski, Mira Holzheimer, Adriaan J. Minnaard, Jaap S. Sinninghe Damsté, and Stefan Schouten
Biogeosciences, 18, 1463–1479, https://doi.org/10.5194/bg-18-1463-2021, https://doi.org/10.5194/bg-18-1463-2021, 2021
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Soils from an everlasting fire (gas seep) in Sicily, Italy, reveal high relative abundances of novel uncultivated mycobacteria and unique 13C-depleted mycocerosic acids (multi-methyl branched fatty acids) close to the main gas seep. Our results imply that mycocerosic acids in combination with their depleted δ13C values offer a new biomarker tool to study the role of soil mycobacteria as hydrocarbon consumers in the modern and past global carbon cycle.
Marcus P. S. Badger
Biogeosciences, 18, 1149–1160, https://doi.org/10.5194/bg-18-1149-2021, https://doi.org/10.5194/bg-18-1149-2021, 2021
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Reconstructing ancient atmospheric CO2 is an important aim of palaeoclimate science in order to understand the Earth's climate system. One method, the alkenone proxy based on molecular fossils of coccolithophores, has been recently shown to be ineffective at low-to-moderate CO2 levels. In this paper I show that this is likely due to changes in the biogeochemistry of the coccolithophores when there is low carbon availability, but for much of the Cenozoic the alkenone proxy should have utility.
Loes G. J. van Bree, Francien Peterse, Allix J. Baxter, Wannes De Crop, Sigrid van Grinsven, Laura Villanueva, Dirk Verschuren, and Jaap S. Sinninghe Damsté
Biogeosciences, 17, 5443–5463, https://doi.org/10.5194/bg-17-5443-2020, https://doi.org/10.5194/bg-17-5443-2020, 2020
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Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are used as a paleothermometer based on their temperature dependence in global soils, but aquatic production complicates their use in lakes. BrGDGTs in the water column of Lake Chala, East Africa, respond to oxygen conditions and mixing. Changes in their signal can be linked to bacterial community composition rather than membrane adaptation to changing conditions. Their integrated signal in the sediment reflects mean air temperature.
Alexandra N. Loginova, Andrew W. Dale, Frédéric A. C. Le Moigne, Sören Thomsen, Stefan Sommer, David Clemens, Klaus Wallmann, and Anja Engel
Biogeosciences, 17, 4663–4679, https://doi.org/10.5194/bg-17-4663-2020, https://doi.org/10.5194/bg-17-4663-2020, 2020
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We measured dissolved organic carbon (DOC), nitrogen (DON) and matter (DOM) optical properties in pore waters and near-bottom waters of the eastern tropical South Pacific off Peru. The difference between diffusion-driven and net fluxes of DOC and DON and qualitative changes in DOM optical properties suggested active microbial utilisation of the released DOM at the sediment–water interface. Our results suggest that the sediment release of DOM contributes to microbial processes in the area.
Gerard J. M. Versteegh, Alexander J. P. Houben, and Karin A. F. Zonneveld
Biogeosciences, 17, 3545–3561, https://doi.org/10.5194/bg-17-3545-2020, https://doi.org/10.5194/bg-17-3545-2020, 2020
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Anoxic sediments mostly contain much more organic matter than oxic ones, and therefore organic matter in anoxic settings is often considered to be preserved better than in oxic settings. However, through the analysis of the same fossil dinoflagellate cyst species from both oxic and anoxic settings, we show that at a molecular level the preservation in the oxic sediments may be better since in the anoxic setting the cyst macromolecule has been altered by postdepositional modification.
Jingjing Guo, Miriam Glendell, Jeroen Meersmans, Frédérique Kirkels, Jack J. Middelburg, and Francien Peterse
Biogeosciences, 17, 3183–3201, https://doi.org/10.5194/bg-17-3183-2020, https://doi.org/10.5194/bg-17-3183-2020, 2020
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The fluxes of soil organic carbon (OC) transport from land to sea are poorly constrained, mostly due to the lack of a specific tracer for soil OC. Here we evaluate the use of specific molecules derived from soil bacteria as a tracer for soil OC in a small river catchment. We find that the initial soil signal is lost upon entering the aquatic environment. However, the local environmental history of the catchment is reflected by these molecules in the lake sediments that act as their sink.
Zhuo-Yi Zhu, Joanne Oakes, Bradley Eyre, Youyou Hao, Edwin Sien Aun Sia, Shan Jiang, Moritz Müller, and Jing Zhang
Biogeosciences, 17, 2473–2485, https://doi.org/10.5194/bg-17-2473-2020, https://doi.org/10.5194/bg-17-2473-2020, 2020
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Samples were collected in August 2016 in the Rajang River and its estuary, with tropical forest in the river basin and peatland in the estuary. Organic matter composition was influenced by transportation in the river basin, whereas peatland added clear biodegraded parts to the fluvial organic matter, which implies modification of the initial lability and/or starting points in the subsequent degradation and alternation processes after the organic matter enters the sea.
Wenjie Xiao, Yasong Wang, Yongsheng Liu, Xi Zhang, Linlin Shi, and Yunping Xu
Biogeosciences, 17, 2135–2148, https://doi.org/10.5194/bg-17-2135-2020, https://doi.org/10.5194/bg-17-2135-2020, 2020
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The hadal zone (6–11 km depth) is the least explored habitat on Earth. We studied microbial branched glycerol dialkyl glycerol tetraethers (brGDGTs) in the Challenger Deep, Mariana Trench. One unique feature is the strong predominance of 6-methyl brGDGT, which likely reflects an adaption of brGDGT-producing bacteria to alkaline seawater and low temperature. BrGDGTs, with elemental and isotopic data, suggest an autochthonous product for brGDGT. A new approach is proposed for brGDGT sourcing.
Yuge Bai, Edisson Subdiaga, Stefan B. Haderlein, Heike Knicker, and Andreas Kappler
Biogeosciences, 17, 683–698, https://doi.org/10.5194/bg-17-683-2020, https://doi.org/10.5194/bg-17-683-2020, 2020
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Biogeochemical processes of SOM are key for greenhouse gas emission and water quality. We extracted SOM by water or by NaOH–HCl under oxic–anoxic conditions. Chemical and anoxic extractions lead to higher SOM electron exchange capacities, resulting in stimulation of microbial Fe(III) reduction. Therefore, aqueous pH-neutral SOM extracts should be used to reflect environmental SOM redox processes, and artifacts of chemical extractions need to be considered when evaluating SOM redox processes.
Yan Shen, Volker Thiel, Pablo Suarez-Gonzalez, Sebastiaan W. Rampen, and Joachim Reitner
Biogeosciences, 17, 649–666, https://doi.org/10.5194/bg-17-649-2020, https://doi.org/10.5194/bg-17-649-2020, 2020
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Today, sterols are widespread in plants, animals, and fungi but are almost absent in the oldest rocks. Microbial mats, representing the earliest complex ecosystems on Earth, were omnipresent in Precambrian marine environments and may have degraded the sterols at that time. Here we analyze the distribution of sterols through a microbial mat. This provides insight into how variations in biological and nonbiological factors affect the preservation of sterols in modern and ancient microbial mats.
Sarah Coffinet, Travis B. Meador, Lukas Mühlena, Kevin W. Becker, Jan Schröder, Qing-Zeng Zhu, Julius S. Lipp, Verena B. Heuer, Matthew P. Crump, and Kai-Uwe Hinrichs
Biogeosciences, 17, 317–330, https://doi.org/10.5194/bg-17-317-2020, https://doi.org/10.5194/bg-17-317-2020, 2020
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This study deals with two membrane lipids called BDGTs and PDGTs. Membrane lipids are molecules forming the cell envelope of all organisms. Different organisms produce different lipids thus they can be used to detect the presence of specific organisms in the environment. We analyzed the structure of these new lipids and looked for potential producers. We found that they are likely made by microbes emitting methane below the sediment surface and could be used to track these specific microbes.
Ying Wu, Kun Zhu, Jing Zhang, Moritz Müller, Shan Jiang, Aazani Mujahid, Mohd Fakharuddin Muhamad, and Edwin Sien Aun Sia
Biogeosciences, 16, 4517–4533, https://doi.org/10.5194/bg-16-4517-2019, https://doi.org/10.5194/bg-16-4517-2019, 2019
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Our understanding of terrestrial organic matter (TOM) in tropical peat-draining rivers remains limited, especially in Southeast Asia. We explored the characteristics of TOM via bulk parameters and lignin phenols of sediment in Malaysia. This showed that the most important plant source of the organic matter in these rivers is woody angiosperm C3 plants with limited diagenetic alteration. This slower degradation of TOM may be a link to higher total nitrogen content, especially for the small river.
Caitlyn R. Witkowski, Sylvain Agostini, Ben P. Harvey, Marcel T. J. van der Meer, Jaap S. Sinninghe Damsté, and Stefan Schouten
Biogeosciences, 16, 4451–4461, https://doi.org/10.5194/bg-16-4451-2019, https://doi.org/10.5194/bg-16-4451-2019, 2019
Short summary
Short summary
Carbon dioxide concentrations (pCO2) in the atmosphere play an integral role in Earth system dynamics, especially climate. Past climates help us understand future ones, but reconstructing pCO2 over the geologic record remains a challenge. This research demonstrates new approaches for exploring past pCO2 via the carbon isotope fractionation in general algal lipids, which we test over a high CO2 gradient from a naturally occurring CO2 seep.
Yongli Zhou, Patrick Martin, and Moritz Müller
Biogeosciences, 16, 2733–2749, https://doi.org/10.5194/bg-16-2733-2019, https://doi.org/10.5194/bg-16-2733-2019, 2019
Short summary
Short summary
We found that peatlands in coastal Sarawak, Borneo, export extremely humified organic matter, which dominates the riverine organic matter pool and conservatively mixes with seawater, while the freshly produced fraction is low and stable in concentration at all salinities. We estimated that terrigenous fractions, which showed high photolability, still account for 20 % of the coastal dissolved organic carbon pool, implying the importance of peat-derived organic matter in the coastal carbon cycle.
Kristin Doering, Claudia Ehlert, Philippe Martinez, Martin Frank, and Ralph Schneider
Biogeosciences, 16, 2163–2180, https://doi.org/10.5194/bg-16-2163-2019, https://doi.org/10.5194/bg-16-2163-2019, 2019
Alexandra N. Loginova, Sören Thomsen, Marcus Dengler, Jan Lüdke, and Anja Engel
Biogeosciences, 16, 2033–2047, https://doi.org/10.5194/bg-16-2033-2019, https://doi.org/10.5194/bg-16-2033-2019, 2019
Short summary
Short summary
High primary production in the Peruvian upwelling system is followed by rapid heterotrophic utilization of organic matter and supports the formation of one of the most intense oxygen minimum zones (OMZs) in the world. Here, we estimated vertical fluxes of oxygen and dissolved organic matter (DOM) from the surface to the OMZ. Our results suggest that DOM remineralization substantially reduces oxygen concentration in the upper water column and controls the shape of the upper oxycline.
Carolina Cisternas-Novoa, Frédéric A. C. Le Moigne, and Anja Engel
Biogeosciences, 16, 927–947, https://doi.org/10.5194/bg-16-927-2019, https://doi.org/10.5194/bg-16-927-2019, 2019
Short summary
Short summary
We investigate the composition and vertical fluxes of POM in two deep basins of the Baltic Sea (GB: Gotland Basin and LD: Landsort Deep). The two basins showed different O2 regimes resulting from the intrusion of oxygen-rich water from the North Sea that ventilated the deep waters in GB, but not in LD.
In GB, O2 intrusions lead to a high abundance of manganese oxides that aggregate with POM, altering its composition and vertical flux and contributing to a higher POC transfer efficiency in GB.
Cited articles
Armand, L. K., Cornet-Barthaux, V., Mosseri, J., and Quéguiner, B.:
Late summer diatom biomass and community structure on and around the
naturally iron-fertilised Kerguelen Plateau in the Southern Ocean, Deep-Sea Res. Pt. II, 55,
653–676,
https://doi.org/10.1016/j.dsr2.2007.12.031, 2008.
Assmy, P., Smetacek, V., Montresor, M., Klaas, C., Henjes, J., Strass, V. H.,
Arrieta, J. M., Bathmann, U., Berg, G. M., Breitbarth, E., Cisewski, B.,
Friedrichs, L., Fuchs, N., Herndl, G. J., Jansen, S., Krägefsky, S.,
Latasa, M., Peeken, I., Röttgers, R., Scharek, R., Schüller, S. E.,
Steigenberger, S., Webb, A., and Wolf-Gladrow, D.: Thick-shelled,
grazer-protected diatoms decouple ocean carbon and silicon cycles in the
iron-limited Antarctic Circumpolar Current, P. Natl. Acad. Sci. USA, 110,
20633–20638, https://doi.org/10.1073/pnas.1309345110, 2013.
Baker, B. J. and Kerr, R. G.: Biosynthesis of marine sterols, in: Marine Natural Products – Diversity and Biosynthesis, edited by: Scheuer,
P. P. J., Topics
in Current Chemistry, Springer, Berlin Heidelberg, 1–31, 1993.
Berger, W. H.: Sedimentation of planktonic foraminifera, Mar. Geol., 11, 325–358, https://doi.org/10.1016/0025-3227(71)90035-1, 1971.
Billett, D. S. M., Lampitt, R. S., Rice, A. L., and Mantoura, R. F. C.: Seasonal
sedimentation of phytoplankton to the deep-sea benthos, Nature, 302,
520–522, https://doi.org/10.1038/302520a0, 1983.
Billett, D. S. M., Bett, B. J., Rice, A. L., Thurston, M. H., Galéron, J.,
Sibuet, M., and Wolff, G. A.: Long-term change in the megabenthos of the
Porcupine Abyssal Plain (NE Atlantic), High resolution
temporal and spatial study of the benthic biology and geochemistry of a
North-Eastern Atlantic abyssal locality (BENGAL), Prog. Oceanogr., 50,
325–348,
https://doi.org/10.1016/S0079-6611(01)00060-X, 2001.
Blain, S., Quéguiner, B., Armand, L., Belviso, S., Bombled, B., Bopp,
L., Bowie, A., Brunet, C., Brussaard, C., Carlotti, F., Christaki, U.,
Corbière, A., Durand, I., Ebersbach, F., Fuda, J.-L., Garcia, N.,
Gerringa, L., Griffiths, B., Guigue, C., Guillerm, C., Jacquet, S., Jeandel,
C., Laan, P., Lefèvre, D., Lo Monaco, C., Malits, A., Mosseri, J.,
Obernosterer, I., Park, Y.-H., Picheral, M., Pondaven, P., Remenyi, T.,
Sandroni, V., Sarthou, G., Savoye, N., Scouarnec, L., Souhaut, M., Thuiller,
D., Timmermans, K., Trull, T., Uitz, J., van Beek, P., Veldhuis, M.,
Vincent, D., Viollier, E., Vong, L., and Wagener, T.: Effect of natural
iron fertilization on carbon sequestration in the Southern Ocean, Nature,
446, 1070–1074, https://doi.org/10.1038/nature05700, 2007.
Blain, S., Sarthou, G., and Laan, P.: Distribution of dissolved iron
during the natural iron-fertilization experiment KEOPS (Kerguelen Plateau,
Southern Ocean), Deep-Sea Res. Pt. II, 55, 594–605,
https://doi.org/10.1016/j.dsr2.2007.12.028, 2008.
Bowie, A. R., van der Merwe, P., Quéroué, F., Trull, T., Fourquez, M.,
Planchon, F., Sarthou, G., Chever, F., Townsend, A. T., Obernosterer, I.,
Sallëe, J.-B., and Blain, S.: Iron budgets for three distinct biogeochemical
sites around the Kerguelen Archipelago (Southern Ocean) during the natural
fertilisation study, KEOPS-2, Biogeosciences, 12, 4421–4445, https://doi.org/10.5194/bg-12-4421-2015, 2015.
Boyd, P. and Newton, P.: Evidence of the potential influence of
planktonic community structure on the interannual variability of particulate
organic carbon flux, Deep-Sea Res. Pt. II, 42, 619–639,
https://doi.org/10.1016/0967-0637(95)00017-Z, 1995.
Boyd, P. W. and Trull, T. W.: Understanding the export of biogenic
particles in oceanic waters: Is there consensus?, Prog. Oceanogr., 72,
276–312, https://doi.org/10.1016/j.pocean.2006.10.007, 2007.
Bradshaw, S. A. and Eglinton, G.: Marine Invertebrate Feeding and the
Sedimentary Lipid Record, in: Organic
Geochemistry, Topics in Geobiology, edited by: Engel, M. H. and Macko, S. A., Springer, USA, 225–235, 1993.
Brandt, A., Gooday, A. J., Brandão, S. N., Brix, S., Brökeland, W.,
Cedhagen, T., Choudhury, M., Cornelius, N., Danis, B., De Mesel, I., Diaz,
R. J., Gillan, D. C., Ebbe, B., Howe, J. A., Janussen, D., Kaiser, S., Linse,
K., Malyutina, M., Pawlowski, J., Raupach, M., and Vanreusel, A.: First
insights into the biodiversity and biogeography of the Southern Ocean deep
sea, Nature, 447, 307–311, https://doi.org/10.1038/nature05827, 2007.
Budge, S. M. and Parrish, C. C.: Lipid biogeochemistry of plankton,
settling matter and sediments in Trinity Bay, Newfoundland. II. Fatty acids,
Org. Geochem., 29, 1547–1559, https://doi.org/10.1016/S0146-6380(98)00177-6, 1998.
Buesseler, K., Bacon, M. P., Cochran, J. K., and Livingston, H. D.: Carbon
and nitrogen export during the JGOFS North Atlantic bloom experiment
estimated from 234Th:238U disequilibria, Deep-Sea Res. Pt. I, 39,
1115–1137, 1992.
Buesseler, K. O., Steinberg, D. K., Michaels, A. F., Johnson, R. J., Andrews, J. E., Valdes, J. R., and Price, J. F.: A comparison of the quantity and composition of material
caught in a neutrally buoyant versus surface-tethered sediment trap, Deep-Sea
Res. Pt. I, 47, 277–294, https://doi.org/10.1016/S0967-0637(99)00056-4, 2000.
Chen, Y.-C.: The biomass and total lipid content and composition of
twelve species of marine diatoms cultured under various environments, Food
Chem., 131, 211–219, https://doi.org/10.1016/j.foodchem.2011.08.062, 2012.
Crosta, X., Pichon, J.-J., and Labracherie, M.: Distribution of
Chaetoceros resting spores in modern peri-Antarctic sediments, Mar.
Micropaleontol., 29, 283–299, https://doi.org/10.1016/S0377-8398(96)00033-3, 1997.
de Baar, H. J. W., Buma, A. G. J., Nolting, R. F., Cadée, G. C., Jacques, G.,
and Tréguer, P.: On iron limitation of the Southern Ocean:
experimental observations in the Weddell and Scotia Seas, Mar. Ecol. Prog.
Ser., 65, 105–122, https://doi.org/10.3354/meps065105, 1990.
Doucette, G. J. and Fryxell, G. A.: Thalassiosira antarctica: vegetative
and resting stage chemical composition of an ice-related marine diatom, Mar.
Biol., 78, 1–6, https://doi.org/10.1007/BF00392964, 1983.
Dufourc, E. J.: Sterols and membrane dynamics, J. Chem. Biol., 1,
63–77, https://doi.org/10.1007/s12154-008-0010-6, 2008.
Dunstan, G. A., Volkman, J. K., Barrett, S. M., Leroi, J.-M., and Jeffrey, S. W.: Essential polyunsaturated fatty acids from 14 species of diatom
(Bacillariophyceae), Phytochemistry, 35, 155–161, https://doi.org/10.1016/S0031-9422(00)90525-9,
1993.
Emerson, S.: Annual net community production and the biological carbon
flux in the ocean, Global Biogeochem. Cy., 28, 2013GB004680,
https://doi.org/10.1002/2013GB004680, 2014.
Emerson, S., Quay, P., Karl, D., Winn, C., Tupas, L., and Landy, M.:
Experimental determination of the organic carbon flux from open-ocean
surface waters, Nature, 359, 951–954, https://doi.org/10.1038/40111, 1997.
Eppley, R. W. and Peterson, B. J.: Particulate organic matter flux and
new production in the deep ocean, Nature, 282, 677–680, https://doi.org/10.1038/282677a0, 1979.
French, F. W. and Hargraves, P. E.: Spore Formation in the Life Cycles of
the Diatoms Chaetoceros Diadema and Leptocylindrus Danicus, J. Phycol., 21,
477–483, https://doi.org/10.1111/j.0022-3646.1985.00477.x, 1985.
Galeron, J., Sibuet, M., Vanreusel, A., Mackenzie, K. L., Gooday, A. J., Dinet,
A.,
and Wolff, G. A.: Temporal patterns among meiofauna and macrofauna taxa
related to changes in sediment geochemistry at an abyssal NE Atlantic site,
Prog. Oceanogr., 50, 303–324, 2001.
Goad, L. J.: Sterol biosynthesis and metabolism in marine
invertebrates, Pure Appl. Chem., 53, 837–852, https://doi.org/10.1351/pac198153040837, 1981.
Graf, G.: Benthic-pelagic coupling in a deep-sea benthic
community, Nature, 341, 437–439, 1989.
Guidi, L., Chaffron, S., Bittner, L., Eveillard, D., Larhlimi, A., Roux, S.,
Darzi, Y., Audic, S., Berline, L., Brum, J., Coelho, L. P., Espinoza, J. C. I.,
Malviya, S., Sunagawa, S., Dimier, C., Kandels-Lewis, S., Picheral, M.,
Poulain, J., Searson, S., Tara Oceans Consortium Coordinators, Stemmann, L.,
Not, F., Hingamp, P., Speich, S., Follows, M., Karp-Boss, L., Boss, E.,
Ogata, H., Pesant, S., Weissenbach, J., Wincker, P., Acinas, S. G., Bork, P.,
de Vargas, C., Iudicone, D., Sullivan, M. B., Raes, J., Karsenti, E., Bowler,
C., and Gorsky, G.: Plankton networks driving carbon export in the
oligotrophic ocean, Nature, published online first, https://doi.org/10.1038/nature16942, 2016.
Harland, R. and Pudsey, C. J.: Dinoflagellate cysts from sediment traps
deployed in the Bellingshausen, Weddell and Scotia seas, Antarctica, Mar.
Micropaleontol., 37, 77–99, https://doi.org/10.1016/S0377-8398(99)00016-X, 1999.
Honjo, S.: Coccoliths: Production, transportation and sedimentation, Mar. Micropaleontol., 1, 65–79, https://doi.org/10.1016/0377-8398(76)90005-0, 1976.
Honjo, S., Manganini, S. J., Krishfield, R. A., and Francois, R.:
Particulate organic carbon fluxes to the ocean interior and factors
controlling the biological pump: A synthesis of global sediment trap
programs since 1983, Prog. Oceanogr., 76, 217–285, https://doi.org/10.1016/j.pocean.2007.11.003, 2008.
Kanazawa, A.: Sterols in marine invertebrates, Fish. Sci., 67,
997–1007, https://doi.org/10.1046/j.1444-2906.2001.00354.x, 2001.
Kaneda, T.: Iso- and anteiso-fatty acids in bacteria: biosynthesis,
function, and taxonomic significance, Microbiol. Rev., 55, 288–302, 1991.
Kates, M. and Volcani, B. E.: Lipid components of diatoms, Biochim.
Biophys. Acta BBA – Lipids Lipid Metab., 116, 264–278, https://doi.org/10.1016/0005-2760(66)90009-9, 1966.
Kiriakoulakis, K., Stutt, E., Rowland, S. J., Vangriesheim, A., Lampitt,
R. S., and Wolff, G. A.: Controls on the organic chemical composition of
settling particles in the Northeast Atlantic Ocean, Prog. Oceanogr., 50,
65–87, https://doi.org/10.1016/S0079-6611(01)00048-9, 2001.
Korb, R. E., Whitehouse, M. J., Atkinson, A., and Thorpe, S. E.: Magnitude
and maintenance of the phytoplankton bloom at South Georgia: a naturally
iron-replete environment, Mar. Ecol. Prog. Ser., 368, 75–91, https://doi.org/10.3354/meps07525, 2008.
Korb, R. E., Whitehouse, M. J., Gordon, M., Ward, P., and Poulton, A. J.:
Summer microplankton community structure across the Scotia Sea: implications
for biological carbon export, Biogeosciences, 7, 343–356, https://doi.org/10.5194/bg-7-343-2010, 2010.
Kuwata, A. and Tsuda, A.: Selection and viability after ingestion of
vegetative cells, resting spores and resting cells of the marine diatom,
Chaetoceros pseudocurvisetus, by two copepods, J. Exp. Mar. Biol. Ecol., 322,
143–151, https://doi.org/10.1016/j.jembe.2005.02.013, 2005.
Kuwata, A., Hama, T., and Takahashi, M.: Ecophysiological characterization
of two life forms, resting spores and resting cells, of a marine planktonic
diatom, Mar. Ecol. Prog. Ser., 102, 245–255, 1993.
Kwon, E. Y., Primeau, F., and Sarmiento, J. L.: The impact of
remineralization depth on the air–sea carbon balance, Nat. Geosci., 2,
630–635, https://doi.org/10.1038/ngeo612, 2009.
Lee, R. F., Nevenzel, J. C., and Paffenhöfer, G.-A.: Wax Esters in
Marine Copepods, Science, 167, 1510–1511, https://doi.org/10.1126/science.167.3924.1510, 1970.
Lee, R. F., Hirota, J., and Barnett, A. M.: Distribution and importance of
wax esters in marine copepods and other zooplankton, Deep-Sea Res., 18, 1147–1165, https://doi.org/10.1016/0011-7471(71)90023-4, 1971.
Lee, R. F., Hagen, W., and Kattner, G.: Lipid storage in marine
zooplankton, Mar. Ecol. Prog. Ser., 307, 273–306, https://doi.org/10.3354/meps307273, 2006.
Lee, C., Peterson, M. L., Wakeham, S. G., Armstrong, R. A., Cochran, J. K.,
Miquel, J. C., Fowler, S. W., Hirschberg, D., Beck, A., and Xue, J.:
Particulate organic matter and ballast fluxes measured using time-series and
settling velocity sediment traps in the northwestern Mediterranean Sea, Deep-Sea Res. Pt. II, 56, 1420–1436, https://doi.org/10.1016/j.dsr2.2008.11.029, 2009.
Legendre, P. and Gallagher, E. D.: Ecologically meaningful transformations
for ordination of species data, Oecologia, 129, 271–280, https://doi.org/10.1007/s004420100716, 2001.
Legendre, P. and Legendre, L.: Numerical Ecology, Édition: 2,
Elsevier Science, Amsterdam, New York, 1998.
Levitan, O., Dinamarca, J., Hochman, G., and Falkowski, P. G.: Diatoms: a
fossil fuel of the future, Trends Biotechnol., 32, 117–124, https://doi.org/10.1016/j.tibtech.2014.01.004, 2014.
Liang, Y., Maeda, Y., Yoshino, T., Matsumoto, M., and Tanaka, T.:
Profiling of fatty acid methyl esters from the oleaginous diatom Fistulifera
sp. strain JPCC DA0580 under nutrition-sufficient and -deficient conditions,
J. Appl. Phycol., 26, 2295–2302, https://doi.org/10.1007/s10811-014-0265-y, 2014.
Lins, L., da Silva, M. C., Hauquier, F., Esteves, A. M., and Vanreusel, A.:
Nematode community composition and feeding shaped by contrasting
productivity regimes in the Southern Ocean, Prog. Oceanogr., 134, 356–369, https://doi.org/10.1016/j.pocean.2015.03.006, 2015.
Mackey, A. P., Atkinson, A., Hill, S. L., Ward, P., Cunningham, N. J.,
Johnston, N. M., and Murphy, E. J.: Antarctic macrozooplankton of the
southwest Atlantic sector and Bellingshausen Sea: Baseline historical
distributions (Discovery Investigations, 1928–1935) related to temperature
and food, with projections for subsequent ocean warming, Deep-Sea Res. Pt.
II, 59, 130–146, 2012.
Manno, C., Stowasser, G., Enderlein, P., Fielding, S., and Tarling, G. A.:
The contribution of zooplankton faecal pellets to deep-carbon transport in the Scotia Sea
(Southern Ocean), Biogeosciences, 12, 1955–1965, https://doi.org/10.5194/bg-12-1955-2015, 2015.
Martin, J. H., Knauer, G. A., Karl, D. M., and Broenkow, W. W.: VERTEX: carbon
cycling in the northeast Pacific, Deep-Sea Res. Pt. I, 34,
267–285, https://doi.org/10.1016/0198-0149(87)90086-0, 1987.
Martin, J. H., Gordon, R. M., and Fitzwater, S. E.: Iron in Antarctic waters,
Nature, 345, 156–158, https://doi.org/10.1038/345156a0, 1990.
Matsueda, H., Handa, N., Inoue, I., and Takano, H.: Ecological
significance of salp fecal pellets collected by sediment traps in the
eastern North Pacific, Mar. Biol., 91, 421–431, https://doi.org/10.1007/BF00428636, 1986.
Matsumoto, M., Sugiyama, H., Maeda, Y., Sato, R., Tanaka, T., and Matsunaga, T.: Marine Diatom, Navicula sp. Strain JPCC DA0580 and Marine Green Alga,
Chlorella sp. Strain NKG400014 as Potential Sources for Biodiesel
Production, Appl. Biochem. Biotechnol., 161, 483–490, https://doi.org/10.1007/s12010-009-8766-x,
2009.
Mayzaud, P., Lacombre, S., and Boutoute, M.: Seasonal and growth stage
changes in lipid and fatty acid composition in the multigeneration copepod
Drepanopus pectinatus from Iles Kerguelen, Antarct. Sci., 23, 3–17, https://doi.org/10.1017/S0954102010000519, 2011.
McQuoid, M. R. and Hobson, L. A.: Diatom Resting Stages, J. Phycol., 32,
889–902, https://doi.org/10.1111/j.0022-3646.1996.00889.x, 1996.
Minas, H. J., Minas, M., and Packard, T. T.: Productivity in upwelling areas
deduced from hydrographic and chemical fields, Limnol. Oceanogr., 31,
1182–1206, https://doi.org/10.4319/lo.1986.31.6.1182, 1986.
Mincks, S. L., Smith, C. R., and DeMaster, D. J.: Persistence of labile
organic matter and microbial biomass in Antarctic shelf sediments: evidence
of a sediment `food bank', Mar. Ecol. Prog. Ser., 300, 3–19, 2005.
Nielsdóttir, M. C., Bibby, T. S., Moore, C. M., Hinz, D. J., Sanders, R.,
Whitehouse, M., Korb, R., and Achterberg, E. P.: Seasonal and spatial
dynamics of iron availability in the Scotia Sea, Mar. Chem., 130–131,
62–72, https://doi.org/10.1016/j.marchem.2011.12.004, 2012.
Obata, T., Fernie, A. R., and Nunes-Nesi, A.: The Central Carbon and Energy
Metabolism of Marine Diatoms, Metabolites, 3, 325–346, https://doi.org/10.3390/metabo3020325, 2013.
Oku, O. and Kamatani, A.: Resting spore formation and biochemical
composition of the marine planktonic diatom Chaetoceros pseudocurvisetus in
culture: ecological significance of decreased nucleotide content and
activation of the xanthophyll cycle by resting spore formation, Mar. Biol.,
135, 425–436, https://doi.org/10.1007/s002270050643, 1999.
Opute, F. K.: Lipid and Fatty-acid Composition of Diatoms, J. Exp. Bot.,
25, 823–835, 1974.
Pollard, R. T., Salter, I., Sanders, R. J., Lucas, M. I., Moore, C. M., Mills,
R. A., Statham, P. J., Allen, J. T., Baker, A. R., Bakker, D. C. E., Charette,
M. A., Fielding, S., Fones, G. R., French, M., Hickman, A. E., Holland, R. J.,
Hughes, J. A., Jickells, T. D., Lampitt, R. S., Morris, P. J., Nédélec,
F. H., Nielsdóttir, M., Planquette, H., Popova, E. E., Poulton, A. J.,
Read, J. F., Seeyave, S., Smith, T., Stinchcombe, M., Taylor, S., Thomalla,
S., Venables, H. J., Williamson, R., and Zubkov, M. V.: Southern Ocean
deep-water carbon export enhanced by natural iron fertilization, Nature, 457,
577–580, https://doi.org/10.1038/nature07716, 2009.
Pond, D. W. and Tarling, G. A.: Phase transitions of wax esters adjust
buoyancy in diapausing Calanoides acutus, Limnol. Oceanogr., 56, 1310–1318, https://doi.org/10.4319/lo.2011.56.4.1310, 2011.
Prahl, F. G., Eglinton, G., Corner, E. D. S., and O'hara, S. C. M.: Copepod
Fecal Pellets as a Source of Dihydrophytol in Marine Sediments, Science, 224,
1235–1237, https://doi.org/10.1126/science.224.4654.1235, 1984.
Quéguiner, B.: Iron fertilization and the structure of planktonic
communities in high nutrient regions of the Southern Ocean, Deep-Sea Res.
Pt. II, 90, 43–54, https://doi.org/10.1016/j.dsr2.2012.07.024, 2013.
Rampen, S. W., Abbas, B. A., Schouten, S., and Sinninghe Damste, J. S.: A
comprehensive study of sterols in marine diatoms (Bacillariophyta):
Implications for their use as tracers for diatom productivity, Limnol.
Oceanogr., 55, 91–105, https://doi.org/10.4319/lo.2010.55.1.0091, 2010.
Rembauville, M., Blain, S., Armand, L., Quéguiner, B., and Salter, I.:
Export fluxes in a naturally iron-fertilized area of the Southern Ocean – Part 2:
Importance of diatom resting spores and faecal pellets for export, Biogeosciences, 12, 3171–3195, https://doi.org/10.5194/bg-12-3171-2015, 2015.
Rembauville, M., Manno, C., Tarling, G.A., Blain, S., and Salter, I.:
Strong contribution of diatom resting spores to deep-sea carbon transfer in
naturally iron-fertilized waters downstream of South Georgia, Deep-Sea Res.
Pt. I, 115, 22–35, https://doi.org/10.1016/j.dsr.2016.05.002, 2016a.
Rembauville, M., Meilland, J., Ziveri, P., Schiebel, R., Blain, S., and Salter,
I.: Planktic foraminifer and coccolith contribution to carbonate
export fluxes over the central Kerguelen Plateau, Deep-Sea Res. Pt.
I, 111, 91–101, https://doi.org/10.1016/j.dsr.2016.02.017, 2016b.
Rembauville, M., Salter, I., Dehairs, F., Miquel, J. C., and Blain, S.:
Annual particulate matter and diatom export in a high nutrient, low
chlorophyll area of the Southern Ocean, Polar Biol., 41, 25–40, https://doi.org/10.1007/s00300-017-2167-3, 2017.
Rigual-Hernández, A. S., Bárcena, M. A., Sierro, F. J., Flores, J. A.,
Hernández-Almeida, I., Sanchez-Vidal, A., Palanques, A., and Heussner, S.: Seasonal to interannual variability and geographic distribution of the
silicoflagellate fluxes in the Western Mediterranean, Mar. Micropaleontol.,
77, 46–57, https://doi.org/10.1016/j.marmicro.2010.07.003,
2010.
Rivkin, R. B., Legendre, L., Deibel, D., Tremblay, J.-É., Klein, B.,
Crocker, K., Roy, S., Silverberg, N., Lovejoy, C., Mesplé, F., Romero,
N., Anderson, M. R., Matthews, P., Savenkoff, C., Vézina, A., Therriault,
J.-C., Wesson, J., Bérubé, C., and Ingram, R. G.: Vertical Flux of
Biogenic Carbon in the Ocean: Is There Food Web Control?, Science, 272,
1163–1166, https://doi.org/10.1126/science.272.5265.1163, 1996.
Ruhl, H. A. and Smith, K. L.: Shifts in Deep-Sea Community Structure Linked
to Climate and Food Supply, Science, 305, 513–515, https://doi.org/10.1126/science.1099759, 2004.
Ruhl, H. A., Ellena, J. A., and Smith, K. L.: Connections between climate,
food limitation, and carbon cycling in abyssal sediment communities, P. Natl. Acad. Sci. USA, 105, 17006–17011, https://doi.org/10.1073/pnas.0803898105, 2008.
Sallée, J. B., Speer, K., and Morrow, R.: Southern Ocean Fronts and
their variability to climate modes, J. Climate, 21, 3020–3039, 2008.
Salter, I., Lampitt, R.S., Sanders, R., Poulton, A., Kemp, A. E. S., Boorman,
B., Saw, K., and Pearce, R.: Estimating carbon, silica and diatom
export from a naturally fertilised phytoplankton bloom in the Southern Ocean
using PELAGRA: A novel drifting sediment trap, Deep-Sea Res. Pt. II, 54, 2233–2259, https://doi.org/10.1016/j.dsr2.2007.06.008, 2007.
Salter, I., Kemp, A. E. S., Lampitt, R. S., and Gledhill, M.: The association
between biogenic and inorganic minerals and the amino acid composition of
settling particles, Limnol. Oceanogr., 55, 2207–2218, https://doi.org/10.4319/lo.2010.55.5.2207, 2010.
Salter, I., Kemp, A. E. S., Moore, C. M., Lampitt, R. S., Wolff, G. A.,
and Holtvoeth, J.: Diatom resting spore ecology drives enhanced carbon
export from a naturally iron-fertilized bloom in the Southern Ocean, Glob.
Biogeochem. Cy., 26, GB1014, https://doi.org/10.1029/2010GB003977, 2012.
Salter, I., Schiebel, R., Ziveri, P., Movellan, A., Lampitt, R., and Wolff,
G. A.: Carbonate counter pump stimulated by natural iron fertilization
in the Polar Frontal Zone, Nat. Geosci., 7, 885–889, https://doi.org/10.1038/ngeo2285, 2014.
Sarmiento, J. L., Toggweiler, J. R., Najjar, R., Webb, D. J., Jenkins, W. J.,
Wunsch, C., Elderfield, H., Whitfield, M., and Minster, J.-F.: Ocean
Carbon-Cycle Dynamics and Atmospheric pCO2, Philos. T. R. Soc. Lond.
Math. Phys. Eng. Sci., 325, 3–21, https://doi.org/10.1098/rsta.1988.0039, 1988.
Sarmiento, J. L., Gruber, N., Brzezinski, M. A., and Dunne, J. P.: High
latitude controls of thermocline nutrients and low latitude biological
productivity, Nature, 427, 56–60, https://doi.org/10.1038/nature02127, 2004.
Savoye, N., Benitez-Nelson, C., Burd, A. B., Cochran, J. K., Charette, M., Buesseler, K. O.,
Jackson, G. A., Roy-Barman, M., Schmidt, S., and Elskens, M.: 234-Th sorption and
export models in the water column: A review, Mar. Chem., 100, 234–249,
https://doi.org/10.1016/j.marchem.2005.10.014, 2006.
Smetacek, V., Assmy, P., and Henjes, J.: The role of grazing in
structuring Southern Ocean pelagic ecosystems and biogeochemical cycles,
Antarct. Sci., 16, 541–558, https://doi.org/10.1017/S0954102004002317, 2004.
Smetacek, V. S.: Role of sinking in diatom life-history cycles:
ecological, evolutionary and geological significance, Mar. Biol., 84,
239–251, https://doi.org/10.1007/BF00392493, 1985.
Smith, C. R., Mincks, S., and DeMaster, D. J.: A synthesis of bentho-pelagic
coupling on the Antarctic shelf: food banks, ecosystem inertia and global
climate change, Deep-Sea Res. Pt. II, 53, 875–894, 2006.
Stübing, D., Hagen, W., and Schmidt, K.: On the use of lipid
biomarkers in marine food web analyses: An experimental case study on the
Antarctic krill, Euphausia superba, Limnol. Oceanogr., 48, 1685–1700, https://doi.org/10.4319/lo.2003.48.4.1685, 2003.
Takahashi, K. and Honjo, S.: Radiolaria: flux, ecology, and taxonomy in the
Pacific and Atlantic, Ocean Biocoenosis Series, 3, 1991, https://doi.org/10.1575/1912/408,
1991.
Tarling, G. A., Ward, P., Atkinson, A., Collins, M. A., and Murphy, E. J.:
DISCOVERY 2010: Spatial and temporal variability in a dynamic polar
ecosystem, Deep-Sea Res. Pt. II, 59–60, 1–13, https://doi.org/10.1016/j.dsr2.2011.10.001, 2012.
Ternois, Y., Sicre, M.-A., Boireau, A., Beaufort, L., Miquel, J.-C.,
and Jeandel, C.: Hydrocarbons, sterols and alkenones in sinking particles
in the Indian Ocean sector of the Southern Ocean, Org. Geochem., 28,
489–501, https://doi.org/10.1016/S0146-6380(98)00008-4, 1998.
Tsukazaki, C., Ishii, K.-I., Saito, R., Matsuno, K., Yamaguchi, A., and Imai,
I.: Distribution of viable diatom resting stage cells in bottom
sediments of the eastern Bering Sea shelf, Deep-Sea Res. Pt. II,
94, 22–30, https://doi.org/10.1016/j.dsr2.2013.03.020, 2013.
Volk, T. and Hoffert, M. I.: Ocean carbon pumps: Analysis of relative
strengths and efficiencies in ocean-driven atmospheric CO2 changes, in: Geophysical Monograph
Series, edited by:
Sundquist, E. T. and Broecker, W. S.,
American Geophysical Union, Washington, D.C., 99–110, 1985.
Volkman, J. K.: A review of sterol markers for marine and terrigenous
organic matter, Org. Geochem., 9, 83–99, https://doi.org/10.1016/0146-6380(86)90089-6, 1986.
Volkman, J. K.: Sterols in microorganisms, Appl. Microbiol. Biotechnol.,
60, 495–506, https://doi.org/10.1007/s00253-002-1172-8, 2003.
Wakeham, S. G.: Organic matter from a sediment trap experiment in the
equatorial north Atlantic: wax esters, steryl esters, triacylglycerols and
alkyldiacylglycerols, Geochim. Cosmochim. Acta, 46, 2239–2257, https://doi.org/10.1016/0016-7037(82)90198-3, 1982.
Wakeham, S. G. and Lee, C.: Production, Transport, and Alteration of
Particulate Organic Matter in the Marine Water Column, in: Organic Geochemistry, Topics in Geobiology, edited by: Engel, M. H. and
Macko, S. A., Springer, USA, 145–169, 1993.
Wakeham, S. G., Farrington, J. W., Gagosian, R. B., Lee, C., DeBaar, H.,
Nigrelli, G. E., Tripp, B. W., Smith, S. O., and Frew, N. M.: Organic matter
fluxes from sediment traps in the equatorial Atlantic Ocean, Nature, 286,
798–800, https://doi.org/10.1038/286798a0, 1980.
Wakeham, S. G., Lee, C., Farrington, J. W., and Gagosian, R. B.:
Biogeochemistry of particulate organic matter in the oceans: results from
sediment trap experiments, Deep-Sea Res. Pt. I, 31,
509–528, https://doi.org/10.1016/0198-0149(84)90099-2, 1984.
Wakeham, S. G., Hedges, J. I., Lee, C., Peterson, M. L., and Hernes, P. J.:
Compositions and transport of lipid biomarkers through the water column and
surficial sediments of the equatorial Pacific Ocean, Deep-Sea Res. Pt. II, 44, 2131–2162, https://doi.org/10.1016/S0967-0645(97)00035-0, 1997.
Wakeham, S. G., Lee, C., Peterson, M. L., Liu, Z., Szlosek, J., Putnam, I. F.,
and Xue, J.: Organic biomarkers in the twilight zone – Time series and
settling velocity sediment traps during MedFlux, Deep-Sea Res. Pt. II, 56, 1437–1453, https://doi.org/10.1016/j.dsr2.2008.11.030, 2009.
Ward, P., Atkinson, A., and Tarling, G.: Mesozooplankton community
structure and variability in the Scotia Sea: a seasonal comparison, Deep-Sea
Res. Pt. II, 59, 78–92, 2012.
Wilson, S. E., Steinberg, D. K., and Buesseler, K. O.: Changes in fecal
pellet characteristics with depth as indicators of zooplankton repackaging
of particles in the mesopelagic zone of the subtropical and subarctic North
Pacific Ocean, Deep Sea Res. Pt. II, 55, 1636–1647, https://doi.org/10.1016/j.dsr2.2008.04.019, 2008.
Wilson, S. E., Ruhl, H. A., and Smith Jr., K. L.: Zooplankton fecal pellet
flux in the abyssal northeast Pacific: A 15 year time-series study, Limnol.
Oceanogr., 58, 881–892, https://doi.org/10.4319/lo.2013.58.3.0881, 2013.
Wolff, G. A., Billett, D. S. M., Bett, B. J., Holtvoeth, J., FitzGeorge-Balfour,
T., Fisher, E. H., Cross, I., Shannon, R., Salter, I., Boorman, B., King,
N. J., Jamieson, A., and Chaillan, F.: The Effects of Natural Iron
Fertilisation on Deep-Sea Ecology: The Crozet Plateau, Southern Indian
Ocean, PLoS ONE, 6, e20697, https://doi.org/10.1371/journal.pone.0020697, 2011.
Xue, J., Lee, C., Wakeham, S. G., and Armstrong, R. A.: Using principal
components analysis (PCA) with cluster analysis to study the organic
geochemistry of sinking particles in the ocean, Org. Geochem., 42, 356–367, https://doi.org/10.1016/j.orggeochem.2011.01.012, 2011.
Zhukova, N. V. and Aizdaicher, N. A.: Lipid and Fatty Acid Composition
during Vegetative and Resting Stages of the Marine Diatom Chaetoceros
salsugineus, Bot. Mar., 44, 287–293, https://doi.org/10.1515/BOT.2001.037, 2001.
Ziveri, P., de Bernardi, B., Baumann, K. H., Stoll, H. M., and Mortyn, P. G.: Sinking of coccolith
carbonate and potential contribution to organic carbon ballasting in the deep
ocean, Deep-Sea Res. Pt. II, 54, 659–675, https://doi.org/10.1016/j.dsr2.2007.01.006, 2007.
Short summary
Sinking phytoplankton from the surface ocean provide the principal energy source to deep-ocean ecosystems. Our aim was to understand how different phytoplankton communities impact the chemical nature of this sinking material. We show certain types of phytoplankton can preferentially export energy-rich storage compounds to the seafloor. Any climate-driven effects on phytoplankton community structure could thus impact remote deep-ocean ecosystems thousands of kilometres beneath the surface.
Sinking phytoplankton from the surface ocean provide the principal energy source to deep-ocean...
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