Articles | Volume 15, issue 21
https://doi.org/10.5194/bg-15-6607-2018
© 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-15-6607-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
07 Nov 2018
Research article |
| 07 Nov 2018
| 07 Nov 2018
Factors influencing test porosity in planktonic foraminifera
Janet E. Burke
CORRESPONDING AUTHOR
Department of Geology and Geophysics, Yale University, 210 Whitney
Avenue, New Haven, CT 06511, USA
Willem Renema
Naturalis Biodiversity Center, P.O. Box 91517, 2300 RA Leiden, the
Netherlands
Michael J. Henehan
Department of Geology and Geophysics, Yale University, 210 Whitney
Avenue, New Haven, CT 06511, USA
GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany
Leanne E. Elder
Department of Geology and Geophysics, Yale University, 210 Whitney
Avenue, New Haven, CT 06511, USA
Catherine V. Davis
School of the Earth, Ocean, and Environment, University of South
Carolina, 701 Sumter Street, EWS 617, Columbia, SC 29208, USA
Amy E. Maas
Bermuda Institute of Ocean Sciences, 17 Biological Station, Ferry
Reach, St. George's GE 01, Bermuda
Gavin L. Foster
Ocean and Earth Science, University of Southampton, National
Oceanography Centre, University Road, Southampton, SO17 1BJ, UK
Ralf Schiebel
Max-Planck-Institut für Chemie, Hahn-Meitner-Weg 1, 55128
Mainz, Germany
Pincelli M. Hull
Department of Geology and Geophysics, Yale University, 210 Whitney
Avenue, New Haven, CT 06511, USA
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Oliver Friedrich, Sietske J. Batenburg, Kazuyoshi Moriya, Silke Voigt, Cécile Cournède, Iris Möbius, Peter Blum, André Bornemann, Jens Fiebig, Takashi Hasegawa, Pincelli M. Hull, Richard D. Norris, Ursula Röhl, Thomas Westerhold, Paul A. Wilson, and IODP Expedition
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Manuscript not accepted for further review
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In the deep sea, the interaction between benthic fauna (tracemakers) and substrate can be preserved as traces (i.e. lebensspuren), which are common features of seafloor landscapes, rendering them promising proxies for inferring biodiversity from marine images. No general correlation was observed between traces and benthic fauna. However, a local correlation was observed between specific stations depending on unknown tracemakers, tracemaker behaviour, and lebensspuren morphotypes.
Cale A. Miller, Pierre Urrutti, Jean-Pierre Gattuso, Steeve Comeau, Anaïs Lebrun, Samir Alliouane, Robert W. Schlegel, and Frédéric Gazeau
Biogeosciences, 21, 315–333, https://doi.org/10.5194/bg-21-315-2024, https://doi.org/10.5194/bg-21-315-2024, 2024
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This work describes an experimental system that can replicate and manipulate environmental conditions in marine or aquatic systems. Here, we show how the temperature and salinity of seawater delivered from a fjord is manipulated to experimental tanks on land. By constantly monitoring temperature and salinity in each tank via a computer program, the system continuously adjusts automated flow valves to ensure the seawater in each tank matches the targeted experimental conditions.
Rachel A. Kruft Welton, George Hoppit, Daniela N. Schmidt, James D. Witts, and Benjamin C. Moon
Biogeosciences, 21, 223–239, https://doi.org/10.5194/bg-21-223-2024, https://doi.org/10.5194/bg-21-223-2024, 2024
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We conducted a meta-analysis of known experimental literature examining how marine bivalve growth rates respond to climate change. Growth is usually negatively impacted by climate change. Bivalve eggs/larva are generally more vulnerable than either juveniles or adults. Available data on the bivalve response to climate stressors are biased towards early growth stages (commercially important in the Global North), and many families have only single experiments examining climate change impacts.
Vincent Mouchi, Christophe Pecheyran, Fanny Claverie, Cécile Cathalot, Marjolaine Matabos, Yoan Germain, Olivier Rouxel, Didier Jollivet, Thomas Broquet, and Thierry Comtet
Biogeosciences, 21, 145–160, https://doi.org/10.5194/bg-21-145-2024, https://doi.org/10.5194/bg-21-145-2024, 2024
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The impact of deep-sea mining will depend critically on the ability of larval dispersal of hydrothermal mollusks to connect and replenish natural populations. However, assessing connectivity is extremely challenging, especially in the deep sea. Here, we investigate the potential of using the chemical composition of larval shells to discriminate larval origins between multiple hydrothermal sites in the southwest Pacific. Our results confirm that this method can be applied with high accuracy.
Tanguy Soulié, Francesca Vidussi, Justine Courboulès, Marie Heydon, Sébastien Mas, Florian Voron, Carolina Cantoni, Fabien Joux, and Behzad Mostajir
EGUsphere, https://doi.org/10.5194/egusphere-2023-2782, https://doi.org/10.5194/egusphere-2023-2782, 2023
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Due to climate change, it is projected that extreme rainfall events, bringing terrestrial matter into coastal seas, will occur more frequently in the Mediterranean region. To test the effects of runoffs of terrestrial matter on plankton communities from Mediterranean coastal waters, an in situ mesocosm experiment was conducted. The simulated runoff affected key processes mediated by plankton, such as primary production and respiration, suggesting major consequences of such events.
Hashim Said Mohamed, Beth Wangui Waweru, and Agnes Muthumbi
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-151, https://doi.org/10.5194/bg-2023-151, 2023
Revised manuscript accepted for BG
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This study looked at the Benguela Upwelling System and its influence on organisms living in the sea bed. Our research found that low dissolved oxygen resulted in reduced species richness and diversity. The density of these organisms peaked at the edge of these hypoxic areas. Hypoxic areas had low diversity, low evenness, and high dominance. Due to this observation, the authors believe that increasing hypoxic areas in the ocean will have a similar influence on organisms as observed in this study.
Anna-Marie Winter, Nadezda Vasilyeva, and Artem Vladimirov
Biogeosciences, 20, 3683–3716, https://doi.org/10.5194/bg-20-3683-2023, https://doi.org/10.5194/bg-20-3683-2023, 2023
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There is an increasing number of fish in poor state, and many do not recover, even when fishing pressure is ceased. An Allee effect can hinder population recovery because it suppresses the fish's productivity at low abundance. With a model fitted to 17 Atlantic cod stocks, we find that ocean warming and fishing can cause an Allee effect. If present, the Allee effect hinders fish recovery. This shows that Allee effects are dynamic, not uncommon, and calls for precautionary management measures.
Afrah Alothman, Daffne López-Sandoval, Carlos M. Duarte, and Susana Agustí
Biogeosciences, 20, 3613–3624, https://doi.org/10.5194/bg-20-3613-2023, https://doi.org/10.5194/bg-20-3613-2023, 2023
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This study investigates bacterial dissolved inorganic carbon (DIC) fixation in the Red Sea, an oligotrophic ecosystem, using stable-isotope labeling and spectroscopy. The research reveals that bacterial DIC fixation significantly contributes to total DIC fixation, in the surface and deep water. The study demonstrates that as primary production decreases, the role of bacterial DIC fixation increases, emphasizing its importance with photosynthesis in estimating oceanic carbon dioxide production.
Arianna Zampollo, Thomas Cornulier, Rory O'Hara Murray, Jacqueline Fiona Tweddle, James Dunning, and Beth E. Scott
Biogeosciences, 20, 3593–3611, https://doi.org/10.5194/bg-20-3593-2023, https://doi.org/10.5194/bg-20-3593-2023, 2023
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This paper highlights the use of the bottom mixed layer depth (BMLD: depth between the end of the pycnocline and the mixed layer below) to investigate subsurface Chlorophyll a (a proxy of primary production) in temperate stratified shelf waters. The strict correlation between subsurface Chl a and BMLD becomes relevant in shelf-productive waters where multiple stressors (e.g. offshore infrastructure) will change the stratification--mixing balance and related carbon fluxes.
Marco Fusi, Sylvain Rigaud, Giovanna Guadagnin, Alberto Barausse, Ramona Marasco, Daniele Daffonchio, Julie Régis, Louison Huchet, Capucine Camin, Laura Pettit, Cristina Vina-Herbon, and Folco Giomi
Biogeosciences, 20, 3509–3521, https://doi.org/10.5194/bg-20-3509-2023, https://doi.org/10.5194/bg-20-3509-2023, 2023
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Oxygen availability in marine water and freshwater is very variable at daily and seasonal scales. The dynamic nature of oxygen fluctuations has important consequences for animal and microbe physiology and ecology, yet it is not fully understood. In this paper, we showed the heterogeneous nature of the aquatic oxygen landscape, which we defined here as the
oxyscape, and we addressed the importance of considering the oxyscape in the modelling and managing of aquatic ecosystems.
Anne L. Morée, Tayler M. Clarke, William W. L. Cheung, and Thomas L. Frölicher
Biogeosciences, 20, 2425–2454, https://doi.org/10.5194/bg-20-2425-2023, https://doi.org/10.5194/bg-20-2425-2023, 2023
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Ocean temperature and oxygen shape marine habitats together with species’ characteristics. We calculated the impacts of projected 21st-century warming and oxygen loss on the contemporary habitat volume of 47 marine species and described the drivers of these impacts. Most species lose less than 5 % of their habitat at 2 °C of global warming, but some species incur losses 2–3 times greater than that. We also calculate which species may be most vulnerable to climate change and why this is the case.
Markus A. Min, David M. Needham, Sebastian Sudek, Nathan Kobun Truelove, Kathleen J. Pitz, Gabriela M. Chavez, Camille Poirier, Bente Gardeler, Elisabeth von der Esch, Andrea Ludwig, Ulf Riebesell, Alexandra Z. Worden, and Francisco P. Chavez
Biogeosciences, 20, 1277–1298, https://doi.org/10.5194/bg-20-1277-2023, https://doi.org/10.5194/bg-20-1277-2023, 2023
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Emerging molecular methods provide new ways of understanding how marine communities respond to changes in ocean conditions. Here, environmental DNA was used to track the temporal evolution of biological communities in the Peruvian coastal upwelling system and in an adjacent enclosure where upwelling was simulated. We found that the two communities quickly diverged, with the open ocean being one found during upwelling and the enclosure evolving to one found under stratified conditions.
Wojciech Majewski, Witold Szczuciński, and Andrew J. Gooday
Biogeosciences, 20, 523–544, https://doi.org/10.5194/bg-20-523-2023, https://doi.org/10.5194/bg-20-523-2023, 2023
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We studied foraminifera living in the fjords of South Georgia, a sub-Antarctic island sensitive to climate change. As conditions in water and on the seafloor vary, different associations of these microorganisms dominate far inside, in the middle, and near fjord openings. Assemblages in inner and middle parts of fjords are specific to South Georgia, but they may become widespread with anticipated warming. These results are important for interpretating fossil records and monitoring future change.
Allanah Joy Paul, Lennart Thomas Bach, Javier Arístegui, Elisabeth von der Esch, Nauzet Hernández-Hernández, Jonna Piiparinen, Laura Ramajo, Kristian Spilling, and Ulf Riebesell
Biogeosciences, 19, 5911–5926, https://doi.org/10.5194/bg-19-5911-2022, https://doi.org/10.5194/bg-19-5911-2022, 2022
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We investigated how different deep water chemistry and biology modulate the response of surface phytoplankton communities to upwelling in the Peruvian coastal zone. Our results show that the most influential drivers were the ratio of inorganic nutrients (N : P) and the microbial community present in upwelling source water. These led to unexpected and variable development in the phytoplankton assemblage that could not be predicted by the amount of inorganic nutrients alone.
Hanna M. Kauko, Philipp Assmy, Ilka Peeken, Magdalena Różańska-Pluta, Józef M. Wiktor, Gunnar Bratbak, Asmita Singh, Thomas J. Ryan-Keogh, and Sebastien Moreau
Biogeosciences, 19, 5449–5482, https://doi.org/10.5194/bg-19-5449-2022, https://doi.org/10.5194/bg-19-5449-2022, 2022
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This article studies phytoplankton (microscopic
plantsin the ocean capable of photosynthesis) in Kong Håkon VII Hav in the Southern Ocean. Different species play different roles in the ecosystem, and it is therefore important to assess the species composition. We observed that phytoplankton blooms in this area are formed by large diatoms with strong silica armors, which can lead to high silica (and sometimes carbon) export to depth and be important prey for krill.
Chloe Carbonne, Steeve Comeau, Phoebe T. W. Chan, Keyla Plichon, Jean-Pierre Gattuso, and Núria Teixidó
Biogeosciences, 19, 4767–4777, https://doi.org/10.5194/bg-19-4767-2022, https://doi.org/10.5194/bg-19-4767-2022, 2022
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For the first time, our study highlights the synergistic effects of a 9-month warming and acidification combined stress on the early life stages of a Mediterranean azooxanthellate coral, Astroides calycularis. Our results predict a decrease in dispersion, settlement, post-settlement linear extention, budding and survival under future global change and that larvae and recruits of A. calycularis are stages of interest for this Mediterranean coral resistance, resilience and conservation.
Iris E. Hendriks, Anna Escolano-Moltó, Susana Flecha, Raquel Vaquer-Sunyer, Marlene Wesselmann, and Núria Marbà
Biogeosciences, 19, 4619–4637, https://doi.org/10.5194/bg-19-4619-2022, https://doi.org/10.5194/bg-19-4619-2022, 2022
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Seagrasses are marine plants with the capacity to act as carbon sinks due to their high primary productivity, using carbon for growth. This capacity can play a key role in climate change mitigation. We compiled and published data showing that two Mediterranean seagrass species have different metabolic rates, while the study method influences the rates of the measurements. Most communities act as carbon sinks, while the western basin might be more productive than the eastern Mediterranean.
Raúl Tapia, Sze Ling Ho, Hui-Yu Wang, Jeroen Groeneveld, and Mahyar Mohtadi
Biogeosciences, 19, 3185–3208, https://doi.org/10.5194/bg-19-3185-2022, https://doi.org/10.5194/bg-19-3185-2022, 2022
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We report census counts of planktic foraminifera in depth-stratified plankton net samples off Indonesia. Our results show that the vertical distribution of foraminifera species routinely used in paleoceanographic reconstructions varies in hydrographically distinct regions, likely in response to food availability. Consequently, the thermal gradient based on mixed layer and thermocline dwellers also differs for these regions, suggesting potential implications for paleoceanographic reconstructions.
Ricardo González-Gil, Neil S. Banas, Eileen Bresnan, and Michael R. Heath
Biogeosciences, 19, 2417–2426, https://doi.org/10.5194/bg-19-2417-2022, https://doi.org/10.5194/bg-19-2417-2022, 2022
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In oceanic waters, the accumulation of phytoplankton biomass in winter, when light still limits growth, is attributed to a decrease in grazing as the mixed layer deepens. However, in coastal areas, it is not clear whether winter biomass can accumulate without this deepening. Using 21 years of weekly data, we found that in the Scottish coastal North Sea, the seasonal increase in light availability triggers the accumulation of phytoplankton biomass in winter, when light limitation is strongest.
Birgit Koehler, Mårten Erlandsson, Martin Karlsson, and Lena Bergström
Biogeosciences, 19, 2295–2312, https://doi.org/10.5194/bg-19-2295-2022, https://doi.org/10.5194/bg-19-2295-2022, 2022
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Understanding species richness patterns remains a challenge for biodiversity management. We estimated fish species richness over a coastal salinity gradient (3–32) with a method that allowed comparing data from various sources. Species richness was 3-fold higher at high vs. low salinity, and salinity influenced species’ habitat preference, mobility and feeding type. If climate change causes upper-layer freshening of the Baltic Sea, further shifts along the identified patterns may be expected.
Uri Obolski, Thomas Wichard, Alvaro Israel, Alexander Golberg, and Alexander Liberzon
Biogeosciences, 19, 2263–2271, https://doi.org/10.5194/bg-19-2263-2022, https://doi.org/10.5194/bg-19-2263-2022, 2022
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The algal genus Ulva plays a major role in coastal ecosystems worldwide and is a promising prospect as an seagriculture crop. A substantial hindrance to cultivating Ulva arises from sudden sporulation, leading to biomass loss. This process is not yet well understood. Here, we characterize the dynamics of Ulva growth, considering the potential impact of sporulation inhibitors, using a mathematical model. Our findings are an essential step towards understanding the dynamics of Ulva growth.
Emanuela Fanelli, Samuele Menicucci, Sara Malavolti, Andrea De Felice, and Iole Leonori
Biogeosciences, 19, 1833–1851, https://doi.org/10.5194/bg-19-1833-2022, https://doi.org/10.5194/bg-19-1833-2022, 2022
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Zooplankton play a key role in marine ecosystems, forming the base of the marine food web and a link between primary producers and higher-order consumers, such as fish. This aspect is crucial in the Adriatic basin, one of the most productive and overexploited areas of the Mediterranean Sea. A better understanding of community and food web structure and their response to water mass changes is essential under a global warming scenario, as zooplankton are sensitive to climate change.
Masaya Yoshikai, Takashi Nakamura, Rempei Suwa, Sahadev Sharma, Rene Rollon, Jun Yasuoka, Ryohei Egawa, and Kazuo Nadaoka
Biogeosciences, 19, 1813–1832, https://doi.org/10.5194/bg-19-1813-2022, https://doi.org/10.5194/bg-19-1813-2022, 2022
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This study presents a new individual-based vegetation model to investigate salinity control on mangrove productivity. The model incorporates plant hydraulics and tree competition and predicts unique and complex patterns of mangrove forest structures that vary across soil salinity gradients. The presented model does not hold an empirical expression of salinity influence on productivity and thus may provide a better understanding of mangrove forest dynamics in future climate change.
Coulson A. Lantz, William Leggat, Jessica L. Bergman, Alexander Fordyce, Charlotte Page, Thomas Mesaglio, and Tracy D. Ainsworth
Biogeosciences, 19, 891–906, https://doi.org/10.5194/bg-19-891-2022, https://doi.org/10.5194/bg-19-891-2022, 2022
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Coral bleaching events continue to drive the degradation of coral reefs worldwide. In this study we measured rates of daytime coral reef community calcification and photosynthesis during a reef-wide bleaching event. Despite a measured decline in coral health across several taxa, there was no change in overall daytime community calcification and photosynthesis. These findings highlight potential limitations of these community-level metrics to reflect actual changes in coral health.
Hyewon Heather Kim, Jeff S. Bowman, Ya-Wei Luo, Hugh W. Ducklow, Oscar M. Schofield, Deborah K. Steinberg, and Scott C. Doney
Biogeosciences, 19, 117–136, https://doi.org/10.5194/bg-19-117-2022, https://doi.org/10.5194/bg-19-117-2022, 2022
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Heterotrophic marine bacteria are tiny organisms responsible for taking up organic matter in the ocean. Using a modeling approach, this study shows that characteristics (taxonomy and physiology) of bacteria are associated with a subset of ecological processes in the coastal West Antarctic Peninsula region, a system susceptible to global climate change. This study also suggests that bacteria will become more active, in particular large-sized cells, in response to changing climates in the region.
Alice E. Webb, Didier M. de Bakker, Karline Soetaert, Tamara da Costa, Steven M. A. C. van Heuven, Fleur C. van Duyl, Gert-Jan Reichart, and Lennart J. de Nooijer
Biogeosciences, 18, 6501–6516, https://doi.org/10.5194/bg-18-6501-2021, https://doi.org/10.5194/bg-18-6501-2021, 2021
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The biogeochemical behaviour of shallow reef communities is quantified to better understand the impact of habitat degradation and species composition shifts on reef functioning. The reef communities investigated barely support reef functions that are usually ascribed to conventional coral reefs, and the overall biogeochemical behaviour is found to be similar regardless of substrate type. This suggests a decrease in functional diversity which may therefore limit services provided by this reef.
Emmanuel Devred, Andrea Hilborn, and Cornelia Elizabeth den Heyer
Biogeosciences, 18, 6115–6132, https://doi.org/10.5194/bg-18-6115-2021, https://doi.org/10.5194/bg-18-6115-2021, 2021
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A theoretical model of grey seal seasonal abundance on Sable Island (SI) coupled with chlorophyll-a concentration [chl-a] measured by satellite revealed the impact of seal nitrogen fertilization on the surrounding waters of SI, Canada. The increase in seals from about 100 000 in 2003 to about 360 000 in 2018 during the breeding season is consistent with an increase in [chl-a] leeward of SI. The increase in seal abundance explains 8 % of the [chl-a] increase.
Julie Meilland, Michael Siccha, Maike Kaffenberger, Jelle Bijma, and Michal Kucera
Biogeosciences, 18, 5789–5809, https://doi.org/10.5194/bg-18-5789-2021, https://doi.org/10.5194/bg-18-5789-2021, 2021
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Planktonic foraminifera population dynamics has long been assumed to be controlled by synchronous reproduction and ontogenetic vertical migration (OVM). Due to contradictory observations, this concept became controversial. We here test it in the Atlantic ocean for four species of foraminifera representing the main clades. Our observations support the existence of synchronised reproduction and OVM but show that more than half of the population does not follow the canonical trajectory.
Federica Maggioni, Mireille Pujo-Pay, Jérome Aucan, Carlo Cerrano, Barbara Calcinai, Claude Payri, Francesca Benzoni, Yves Letourneur, and Riccardo Rodolfo-Metalpa
Biogeosciences, 18, 5117–5140, https://doi.org/10.5194/bg-18-5117-2021, https://doi.org/10.5194/bg-18-5117-2021, 2021
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Based on current experimental evidence, climate change will affect up to 90 % of coral reefs worldwide. The originality of this study arises from our recent discovery of an exceptional study site where environmental conditions (temperature, pH, and oxygen) are even worse than those forecasted for the future.
While these conditions are generally recognized as unfavorable for marine life, we found a rich and abundant coral reef thriving under such extreme environmental conditions.
Nisan Sariaslan and Martin R. Langer
Biogeosciences, 18, 4073–4090, https://doi.org/10.5194/bg-18-4073-2021, https://doi.org/10.5194/bg-18-4073-2021, 2021
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Analyses of foraminiferal assemblages from the Mamanguape mangrove estuary (northern Brazil) revealed highly diverse, species-rich, and structurally complex biotas. The atypical fauna resembles shallow-water offshore assemblages and are interpreted to be the result of highly saline ocean waters penetrating deep into the estuary. The findings contrast with previous studies, have implications for the fossil record, and provide novel perspectives for reconstructing mangrove environments.
Jutta E. Wollenburg, Jelle Bijma, Charlotte Cremer, Ulf Bickmeyer, and Zora Mila Colomba Zittier
Biogeosciences, 18, 3903–3915, https://doi.org/10.5194/bg-18-3903-2021, https://doi.org/10.5194/bg-18-3903-2021, 2021
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Cultured at in situ high-pressure conditions Cibicides and Cibicidoides taxa develop lasting ectoplasmic structures that cannot be retracted or resorbed. An ectoplasmic envelope surrounds their test and may protect the shell, e.g. versus carbonate aggressive bottom water conditions. Ectoplasmic roots likely anchor the specimens in areas of strong bottom water currents, trees enable them to elevate themselves above ground, and twigs stabilize and guide the retractable pseudopodial network.
Kumar Nimit
Biogeosciences, 18, 3631–3635, https://doi.org/10.5194/bg-18-3631-2021, https://doi.org/10.5194/bg-18-3631-2021, 2021
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The Indian Ocean Rim hosts many of the underdeveloped and emerging economies that depend on ocean resources for the livelihood of millions. Operational ocean information services cater to the requirements of resource managers and end-users to efficiently harness resources, mitigate threats and ensure safety. This paper outlines existing tools and explores the ongoing research that has the potential to convert the findings into operational services in the near- to midterm.
Finn Mielck, Rune Michaelis, H. Christian Hass, Sarah Hertel, Caroline Ganal, and Werner Armonies
Biogeosciences, 18, 3565–3577, https://doi.org/10.5194/bg-18-3565-2021, https://doi.org/10.5194/bg-18-3565-2021, 2021
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Marine sand mining is becoming more and more important to nourish fragile coastlines that face global change. We investigated the largest sand extraction site in the German Bight. The study reveals that after more than 35 years of mining, the excavation pits are still detectable on the seafloor while the sediment composition has largely changed. The organic communities living in and on the seafloor were strongly decimated, and no recovery is observable towards previous conditions.
France Van Wambeke, Elvira Pulido, Philippe Catala, Julie Dinasquet, Kahina Djaoudi, Anja Engel, Marc Garel, Sophie Guasco, Barbara Marie, Sandra Nunige, Vincent Taillandier, Birthe Zäncker, and Christian Tamburini
Biogeosciences, 18, 2301–2323, https://doi.org/10.5194/bg-18-2301-2021, https://doi.org/10.5194/bg-18-2301-2021, 2021
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Michaelis–Menten kinetics were determined for alkaline phosphatase, aminopeptidase and β-glucosidase in the Mediterranean Sea. Although the ectoenzymatic-hydrolysis contribution to heterotrophic prokaryotic needs was high in terms of N, it was low in terms of C. This study points out the biases in interpretation of the relative differences in activities among the three tested enzymes in regard to the choice of added concentrations of fluorogenic substrates.
Oscar E. Romero, Simon Ramondenc, and Gerhard Fischer
Biogeosciences, 18, 1873–1891, https://doi.org/10.5194/bg-18-1873-2021, https://doi.org/10.5194/bg-18-1873-2021, 2021
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Upwelling intensity along NW Africa varies on the interannual to decadal timescale. Understanding its changes is key for the prediction of future changes of CO2 sequestration in the northeastern Atlantic. Based on a multiyear (1988–2009) sediment trap experiment at the site CBmeso, fluxes and the species composition of the diatom assemblage are presented. Our data help in establishing the scientific basis for forecasting and modeling future states of this ecosystem and its decadal changes.
Katharine T. Bigham, Ashley A. Rowden, Daniel Leduc, and David A. Bowden
Biogeosciences, 18, 1893–1908, https://doi.org/10.5194/bg-18-1893-2021, https://doi.org/10.5194/bg-18-1893-2021, 2021
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Turbidity flows – underwater avalanches – are large-scale physical disturbances believed to have profound impacts on productivity and diversity of benthic communities in the deep sea. We reviewed published studies and found that current evidence for changes in productivity is ambiguous at best, but the influence on regional and local diversity is clearer. We suggest study design criteria that may lead to a better understanding of large-scale disturbance effects on deep-sea benthos.
Phillip Williamson, Hans-Otto Pörtner, Steve Widdicombe, and Jean-Pierre Gattuso
Biogeosciences, 18, 1787–1792, https://doi.org/10.5194/bg-18-1787-2021, https://doi.org/10.5194/bg-18-1787-2021, 2021
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The reliability of ocean acidification research was challenged in early 2020 when a high-profile paper failed to corroborate previously observed impacts of high CO2 on the behaviour of coral reef fish. We now know the reason why: the
replicatedstudies differed in many ways. Open-minded and collaborative assessment of all research results, both negative and positive, remains the best way to develop process-based understanding of the impacts of ocean acidification on marine organisms.
Michael Lintner, Bianca Lintner, Wolfgang Wanek, Nina Keul, and Petra Heinz
Biogeosciences, 18, 1395–1406, https://doi.org/10.5194/bg-18-1395-2021, https://doi.org/10.5194/bg-18-1395-2021, 2021
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Foraminifera are unicellular marine organisms that play an important role in the marine element cycle. Changes of environmental parameters such as salinity or temperature have a significant impact on the faunal assemblages. Our experiments show that changes in salinity immediately influence the foraminiferal activity. Also the light regime has a significant impact on carbon or nitrogen processing in foraminifera which contain no kleptoplasts.
Michele Casini, Martin Hansson, Alessandro Orio, and Karin Limburg
Biogeosciences, 18, 1321–1331, https://doi.org/10.5194/bg-18-1321-2021, https://doi.org/10.5194/bg-18-1321-2021, 2021
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In the past 20 years the condition of the eastern Baltic cod has dropped, with large implications for the fishery. Our results show that simultaneously the cod population has moved deeper while low-oxygenated waters detrimental for cod growth have become shallower. Cod have thus dwelled more in detrimental waters, explaining the drop in its condition. This study, using long-term fish and hydrological monitoring data, evidences the impact of deoxygenation on fish biology and fishing.
Elizabeth D. LaBone, Kenneth A. Rose, Dubravko Justic, Haosheng Huang, and Lixia Wang
Biogeosciences, 18, 487–507, https://doi.org/10.5194/bg-18-487-2021, https://doi.org/10.5194/bg-18-487-2021, 2021
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The hypoxic zone is an area of low dissolved oxygen (DO) in the Gulf of Mexico. Fish can be killed by exposure to hypoxia and can be negatively impacted by exposure to low, nonlethal DO concentrations (sublethal DO). We found that high sublethal area resulted in higher exposure and DO variability had a small effect on exposure. There was a large variation in exposure among individuals, which when combined with spatial variability of DO, can result in an underestimation of exposure when averaged.
Svenja Reents, Peter Mueller, Hao Tang, Kai Jensen, and Stefanie Nolte
Biogeosciences, 18, 403–411, https://doi.org/10.5194/bg-18-403-2021, https://doi.org/10.5194/bg-18-403-2021, 2021
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By conducting a flooding experiment with two genotypes of the salt-marsh grass Elymus athericus, we show considerable differences in biomass response to flooding within the same species. As biomass production plays a major role in sedimentation processes and thereby salt-marsh accretion, we emphasise the importance of taking intraspecific differences into account when evaluating ecosystem resilience to accelerated sea level rise.
Cara Nissen and Meike Vogt
Biogeosciences, 18, 251–283, https://doi.org/10.5194/bg-18-251-2021, https://doi.org/10.5194/bg-18-251-2021, 2021
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Using a regional Southern Ocean ecosystem model, we find that the relative importance of Phaeocystis and diatoms at high latitudes is controlled by iron and temperature variability, with light levels controlling the seasonal succession in coastal areas. Yet, biomass losses via aggregation and grazing matter as well. We show that the seasonal succession of Phaeocystis and diatoms impacts the seasonality of carbon export fluxes with ramifications for nutrient cycling and food web dynamics.
Jiangtao Li, Lingyuan Gu, Shijie Bai, Jie Wang, Lei Su, Bingbing Wei, Li Zhang, and Jiasong Fang
Biogeosciences, 18, 113–133, https://doi.org/10.5194/bg-18-113-2021, https://doi.org/10.5194/bg-18-113-2021, 2021
Short summary
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Few studies have focused on the particle-attached (PA) and free-living (FL) microbes of the deep ocean. Here we determined PA and FL microbial communities along depth profiles of the SCS. PA and FL fractions accommodated divergent microbial compositions, and most of them are potentially generalists with PA and FL dual lifestyles. A potential vertical connectivity between surface-specific microbes and those in the deep ocean was indicated, likely through microbial attachment to sinking particles.
Saskia Brix, Karen J. Osborn, Stefanie Kaiser, Sarit B. Truskey, Sarah M. Schnurr, Nils Brenke, Marina Malyutina, and Pedro Martinez Arbizu
Biogeosciences, 17, 6163–6184, https://doi.org/10.5194/bg-17-6163-2020, https://doi.org/10.5194/bg-17-6163-2020, 2020
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The Clarion–Clipperton Fracture Zone (CCZ) located in the Pacific is commercially the most important area of proposed manganese nodule mining. Extraction of this will influence the life and distribution of small deep-sea invertebrates like peracarid crustaceans, of which >90 % are undescribed species new to science. We are doing a species delimitation approach as baseline for an ecological interpretation of species distribution and discuss the results in light of future deep-sea conservation.
Amal Jayakumar and Bess B. Ward
Biogeosciences, 17, 5953–5966, https://doi.org/10.5194/bg-17-5953-2020, https://doi.org/10.5194/bg-17-5953-2020, 2020
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Diversity and community composition of nitrogen-fixing microbes in the three main oxygen minimum zones of the world ocean were investigated using nifH clone libraries. Representatives of three main clusters of nifH genes were detected. Sequences were most diverse in the surface waters. The most abundant OTUs were affiliated with Alpha- and Gammaproteobacteria. The sequences were biogeographically distinct and the dominance of a few OTUs was commonly observed in OMZs in this (and other) studies.
Cited articles
Agutter, P. S. and Wheatley, D. N.: Metabolic scaling: consensus or
controversy?, Theor. Biol. Med. Model., 1, https://doi.org/10.1186/1742-4682-1-13,
2004.
Anagnostou, E., John, E. H., Edgar, K. M., Foster, G. L., Ridgwell, A.,
Inglis, G. N., Pancost, R. D., Lunt, D. J., and Pearson, P. N.: Changing
atmospheric CO2 concentration was the primary driver of early Cenozoic
climate, Nature, 533, 380–384, 2016.
Aze, T., Ezard, T. H., Purvis, A., Coxall, H. K., Stewart, D. R., Wade, B.
S., and Pearson, P. N.: A phylogeny of Cenozoic macroperforate planktonic
foraminifera from fossil data, Biol. Rev., 86, 900–927, 2011.
Bé, A. W.: Shell porosity of Recent planktonic foraminifera as a climatic
index, Science, 161, 881–884, 1968.
Bé, A.: Gametogenic calcification in a spinose planktonic foraminifer,
Globigerinoides sacculifer (Brady), Mar. Micropaleontol., 5, 283–310, 1980.
Bé, A. W.: Biology of planktonic foraminifera, Studies in Geology, Notes
for a Short Course, 6, 51–89, 1982.
Bé, A. W. and Duplessy, J.-C.: Subtropical convergence fluctuations and
Quaternary climates in the middle latitudes of the Indian Ocean, Science,
194, 419–422, 1976.
Bé, A. W., Harrison, S. M., and Lott, L.: Orbulina universa d'Orbigny in
the Indian Ocean, Micropaleontology, 19, 150–192, 1973.
Berthold, W.-U.: Ultrastrukturanalyse der endoplasmatischen Algen von
Amphistegina lessonii d'Orbigny, Foraminifera (Protozoa) und ihre
systematische Stellung, Arch. Protistenkd., 120, 16–62, 1978.
Bijma, J., Hemleben, C., Oberhaensli, H., and Spindler, M.: The effects of
increased water fertility on tropical spinose planktonic foraminifers in
laboratory cultures, J. Foramin. Res., 22, 242–256, 1992.
Bijma, J., Spero, H., and Lea, D.: Reassessing foraminiferal stable isotope
geochemistry: Impact of the oceanic carbonate system (experimental results),
in: Use of proxies in paleoceanography, Berlin, Heidelberg, Springer, 1999.
Birch, H. S., Coxall, H. K., Pearson, P. N., Kroon, D., and Schmidt, D. N.:
Partial collapse of the marine carbon pump after the Cretaceous-Paleogene
boundary, Geology, 44, 287–290, 2016.
Bird, C., Darling, K. F., Russell, A. D., Fehrenbacher, J. S., Davis, C. V.,
Free, A., and Ngwenya, B. T.: 16S rRNA gene metabarcoding and TEM reveals
different ecological strategies within the genus Neogloboquadrina
(planktonic foraminifer), PloS one, 13, e0191653, https://doi.org/10.1371/journal.pone.0191653, 2018.
Bolli, H. M., Beckmann, J.-P., and Saunders, J. B.: Benthic foraminiferal
biostratigraphy of the south Caribbean region, Cambridge University Press, Cambridge,
UK,
1994.
Boyer, A. G.: Consistent ecological selectivity through time in Pacific
island avian extinctions, Conserv. Biol., 24, 511–519, 2010.
Brown, J. H., Gillooly, J. F., Allen, A. P., Savage, V. M., and West, G. B.:
Toward a metabolic theory of ecology, Ecology, 85, 1771–1789, 2004.
Burke, J., Renema, W., Henehan, M. J., Elder, L. E., Davis, C. V., Maas, A.
E., Foster, G. L., Schiebel, R., and Hull, P. M.: Factors influencing
porosity in planktonic foraminifera, PANGAEA,
https://doi.org/10.1594/PANGAEA.890092, 2018.
Caron, D. A., Anderson, O. R., Lindsey, J. L., Faber Jr, W. W., and Lim, E.
L.: Effects of gametogenesis on test structure and dissolution of some
spinose planktonic foraminifera and implications for test preservation, Mar.
Micropaleontol., 16, 93–116, 1990.
Caron, D. A., Faber, W. W., and Bé, A. W.: Effects of temperature and
salinity on the growth and survival of the planktonic foraminifer
Globigerinoides sacculifer, J. Mar. Biol. Assoc. UK, 67, 323–341, 1987a.
Caron, D. A., Faber, W. W., and Bé, A. W.: Growth of the spinose
planktonic foraminifer Orbulina universa in laboratory culture and the effect
of temperature on life processes, J. Mar. Biol. Assoc. UK, 67, 343–358,
1987b.
Colombo, M. R. and Cita, M. B.: Changes in size and test porosity of Orbulina
universa d'Orbigny in the Pleistocene record of Cape Bojador (DSDP Site 397,
Eastern North Atlantic), Mar. Micropaleontol., 5, 13–29, 1980.
Constandache, M., Yerly, F., and Spezzaferri, S.: Internal pore measurements
on macroperforate planktonic Foraminifera as an alternative morphometric
approach, Swiss J. Geosci., 106, 179–186, 2013.
Cutler, D. R., Edwards, T. C., Beard, K. H., Cutler, A., Hess, K. T., Gibson,
J., and Lawler, J. J.: Random forests for classification in ecology, Ecology,
88, 2783–2792, 2007.
Darling, K. F. and Wade, C. M.: The genetic diversity of planktic
foraminifera and the global distribution of ribosomal RNA genotypes, Mar.
Micropaleontol., 67, 216–238, 2008.
Davidson, A. D., Hamilton, M. J., Boyer, A. G., Brown, J. H., and Ceballos,
G.: Multiple ecological pathways to extinction in mammals, P. Natl. Acad. Sci
USA, 106, 10702–10705, 2009.
de Vargas, C., Norris, R., Zaninetti, L., Gibb, S. W., and Pawlowski, J.:
Molecular evidence of cryptic speciation in planktonic foraminifers and their
relation to oceanic provinces, P. Natl. Acad. Sci USA, 96, 2864–2868, 1999.
de Vargas, C., Renaud, S., Hilbrecht, H., and Pawlowski, J.: Pleistocene
adaptive radiation in Globorotalia truncatulinoides: genetic, morphologic,
and environmental evidence, Paleobiology, 27, 104–125, 2001.
Erez, J.: Calcification rates, photosynthesis and light in planktonic
foraminifera, in: Biomineralization and biological metal accumulation,
Springer, 1983.
Evans, J. S., Murphy, M. A., Holden, Z. A., and Cushman, S. A.: Modeling
species distribution and change using random forest, in: Predictive species
and habitat modeling in landscape ecology, Springer, 2011.
Ezard, T. H., Edgar, K. M., and Hull, P. M.: Environmental and biological
controls on size-specific δ13C and δ18O in recent
planktonic foraminifera, Paleoceanography, 30, 151–173, 2015.
Fisher, C. G., Sageman, B. B., Asure, S. E., Acker, B., and Mahar, Z.:
Planktic Foraminiferal Porosity Analysis as a Tool for Paleoceanographic
Reconstruction, Mid-Cretaceous Western Interior Sea, Palaios, 18, 34–46,
2003.
Frerichs, W. E., Heiman, M. E., Borgman, L. E., and Bé, A. W. H.:
Latitudinal Variations in Planktonic Foraminiferal Test Porosity Part 1.
Optical Studies, J. Foramin. Res., 2, 6–13, 1972.
Garcia, H. E., Locarnini, R. A., Boyer, T. P., Antonov, J. I., Baranova, O. K.,
Zweng, M. M., Reagan, J. R., and Johnson, D. R.: World Ocean Atlas 2013,
Vol. 3, Dissolved Oxygen, Apparent Oxygen Utilization, and Oxygen Saturation, NOAA
Atlas NESDIS, 75, 2013.
Glazier, D. S.: Activity affects intraspecific body-size scaling of metabolic
rate in ectothermic animals, J. Comp. Physiol. B, 179, 821–828, 2009.
Glock, N., Eisenhauer, A., Milker, Y., Liebetrau, V., Schönfeld, J.,
Mallon, J., Sommer, S., and Hensen, C.: Environmental influences on the pore
density of Bolivina spissa (Cushman), J. Foramin. Res., 41, 22–32, 2011.
Hecht, A. D.: An ecologic model for test size variation in Recent planktonic
foraminifera; applications to the fossil record, J.
Foramin. Res., 6, 295–311, 1976.
Hemleben, C., Spindler, M., and Anderson, O. R.: Modern planktonic
foraminifera, Springer Science & Business Media, 1989.
Henehan, M. J., Evans, D., Shankle, M., Burke, J. E., Foster, G. L., Anagnostou,
E., Chalk, T. B., Stewart, J. A., Alt, C. H. S., Durrant, J., and Hull, P. M.:
Size-dependent response of foraminiferal calcification to seawater carbonate
chemistry, Biogeosciences, 14, 3287–3308, https://doi.org/10.5194/bg-14-3287-2017, 2017.
Hochachka, P. a. G. N. S.: Biochemical Adaptation, Mechanism and Process in
Physiological Evolution Oxford University Press, New York, USA, 2002.
Hottinger, L. and Dreher, D.: Differentiation of protoplasm in Nummulitidae
(foraminifera) from Elat, Red Sea, Mar. Biol., 25, 41–61, 1974.
Hsiang, A. Y., Elder, L. E., and Hull, P. M.: Towards a morphological metric
of assemblage dynamics in the fossil record: a test case using planktonic
foraminifera, Phil. Trans. R. Soc. B, 371, 20150227,
https://doi.org/10.1098/rstb.2015.0227, 2016.
Hsiang, A. Y., Nelson, K., Elder, L. E., Sibert, E. C., Kahanamoku, S. S.,
Burke, J. E., Kelly, A., Liu, Y., and Hull, P. M.: AutoMorph: Accelerating
morphometrics with automated 2D and 3D image processing and shape extraction,
Methods Ecol. Evol., https://doi.org/10.1111/2041-210X.12915, 2017.
Huber, B. T., Bijma, J., and Darling, K.: Cryptic speciation in the living
planktonic foraminifer Globigerinella siphonifera (d'Orbigny), Paleobiology,
23, 33–62, 1997.
Kennett, J. P. and Srinivasan, M.: Neogene planktonic foraminifera: a
phylogenetic atlas, Hutchinson Ross, 1983.
Kleiber, M.: The fire of life. An introduction to animal energetics, The fire
of life, An introduction to animal energetics, 1961.
Kuhnt, T., Schiebel, R., Schmiedl, G., Milker, Y., Mackensen, A., and
Friedrich, O.: Automated and manual analyses of the pore density-to-oxygen
relationship in Globobulimina turgida (Bailey), J. Foramin.
Res., 44, 5–16, 2014.
Kuroyanagi, A., da Rocha, R. E., Bijma, J., Spero, H. J., Russell, A. D.,
Eggins, S. M., and Kawahata, H.: Effect of dissolved oxygen concentration on
planktonic foraminifera through laboratory culture experiments and
implications for oceanic anoxic events, Mar. Micropaleontol., 101, 28–32,
2013.
Lamont-Doherty: Sample EW-9303-04, IGSN: DSR00078R.
Lamont-Doherty: Sample VM20-248, IGSN: DSR00079L.
Lea, D. W., Mashiotta, T. A., and Spero, H. J.: Controls on magnesium and
strontium uptake in planktonic foraminifera determined by live culturing,
Geochim. Cosmochim. Ac., 63, 2369–2379, 1999.
Leutenegger, S. and Hansen, H.: Ultrastructural and radiotracer studies of
pore function in foraminifera, Mar. Biol., 54, 11–16, 1979.
Locarnini, R. A., Mishonov, A. V., Antonov, J. I., Boyer, T. P., Garcia, H.
E., Baranova, O. K., Zweng, M. M., Paver, C. R., Reagan, J. R., Johnson, D.
R., Hamilton, M., and Seidov, D.: World Ocean Atlas 2013, Volume 1:
Temperature, edited by: Levitus, S., A. Mishonov Technical Ed., NOAA Atlas
NESDIS 73, 40 pp., 2013.
Lombard, F., Erez, J., Michel, E., and Labeyrie, L.: Temperature effect on
respiration and photosynthesis of the symbiont-bearing planktonic
foraminifera Globigerinoides ruber, Orbulina universa, and Globigerinella
siphonifera, Limnol. Oceanogr., 54, 210–218, 2009.
Malmgren, B. and Healy-Williams, N.: Variation in test diameter of Orbulina
universa in the paleoclimatology of the late Quaternary of the Gulf of
Mexico, Palaeogeogr. Palaeocl., 25, 235–240, 1978.
Marshall, B. J., Thunell, R. C., Spero, H. J., Henehan, M. J., Lorenzoni, L.,
and Astor, Y.: Morphometric and stable isotopic differentiation of Orbulina
universa morphotypes from the Cariaco Basin, Venezuela, Mar. Micropaleontol.,
120, 46–64, 2015.
Marszalek, D. S.: The role of heavy skeletons in vertical movements of
non-motile zooplankton, Mar. Freshw. Behav. Phy, 8,
295–303, 1982.
Morard, R., Quillévéré, F., Escarguel, G., de Garidel-Thoron, T.,
de Vargas, C., and Kucera, M.: Ecological modeling of the temperature
dependence of cryptic species of planktonic Foraminifera in the Southern
Hemisphere, Palaeogeogr. Palaeocl., 391, 13–33, 2013.
Morard, R., Quillévéré, F., Escarguel, G., Ujiie, Y., de
Garidel-Thoron, T., Norris, R. D., and de Vargas, C.: Morphological
recognition of cryptic species in the planktonic foraminifer Orbulina
universa, Mar. Micropaleontol., 71, 148–165, 2009.
Morard, R., Reinelt, M., Chiessi, C. M., Groeneveld, J., and Kucera, M.:
Tracing shifts of oceanic fronts using the cryptic diversity of the
planktonic foraminifera Globorotalia inflata, Paleoceanography, 31,
1193-1205, 2016.
Pagel, M.: Inferring the historical patterns of biological evolution, Nature,
401, 877–884, 1999.
Qianyu, L. and Radford, S. S.: Evolution and biogeography of Paleogene
microperforate planktonic foraminifera, Palaeogeogr. Palaeocl., 83, 87–115,
1991.
Quillevere, F., Morard, R., Escarguel, G., Douady, C. J., Ujiié, Y., De
Garidel-Thoron, T., and de Vargas, C.: Global scale same-specimen
morpho-genetic analysis of Truncorotalia truncatulinoides: A perspective on
the morphological species concept in planktonic foraminifera, Palaeogeogr.
Palaeocl., 391, 2–12, 2013.
Ravelo, A. and Fairbanks, R.: Carbon isotopic fractionation in multiple
species of planktonic foraminifera from core-tops in the tropical Atlantic,
J. Foramin. Res., 25, 53–74, 1995.
Russell, A. D., Hönisch, B., Spero, H. J., and Lea, D. W.: Effects of
seawater carbonate ion concentration and temperature on shell U, Mg, and Sr
in cultured planktonic foraminifera, Geochim. Cosmochim. Ac., 68,
4347–4361, 2004.
Schiebel, R. and Hemleben, C.: Planktic Foraminifers in the Modern Ocean,
Springer, 2017.
Schmidt, D., Elliott, T., and Kasemann, S.: The influences of growth rates
on planktic foraminifers as proxies for palaeostudies – a review, Geol.
Soc. Spec. Publ., 303, 73–85, 2008.
Schmidt, D. N., Rayfield, E. J., Cocking, A., and Marone, F.: Linking
evolution and development: Synchrotron Radiation X-ray tomographic microscopy
of planktic foraminifers, Palaeontology, 56, 741–749, 2013.
Schmidt-Nielsen, K.: Scaling: why is animal size so important?, Cambridge
Uninversity Press, Cambridge, UK, 1984.
Schneider, C. A., Rasband, W. S., and Eliceiri, K. W.: NIH Image to ImageJ:
25 years of image analysis, Nat. Methods, 9, 671–675, 2012.
Spero, H. J., Bijma, J., Lea, D. W., and Bemis, B. E.: Effect of seawater
carbonate concentration on foraminiferal carbon and oxygen isotopes, Nature,
390, 497–500, 1997.
Spero, H. J., Lerche, I., and Williams, D. F.: Opening the carbon isotope
“vital effect” black box, 2, quantitative model for interpreting
foraminiferal carbon isotope data, Paleoceanography, 6, 639–655, 1991.
Spero, H. J., Eggins, S. M., Russell, A. D., Vetter, L., Kilburn, M. R., and
Hönisch, B.: Timing and mechanism for intratest Mg∕Ca variability in a
living planktic foraminifer, Earth Planet. Sc. Lett., 409,
32–42, 2015.
Strobl, C., Boulesteix, A.-L., Kneib, T., Augustin, T., and Zeileis, A.:
Conditional variable importance for random forests, BMC Bioinformatics, 9,
307, https://doi.org/10.1186/1471-2105-9-307, 2008.
Visscher, P. M., Hill, W. G., and Wray, N. R.: Heritability in the genomics
era-concepts and misconceptions, Nat. Rev. Gen., 9, 255–266, 2008.
Weiner, A. K., Weinkauf, M. F., Kurasawa, A., Darling, K. F., and Kucera, M.:
Genetic and morphometric evidence for parallel evolution of the
Globigerinella calida morphotype, Mar. Micropaleontol., 114, 19–35, 2015.
Wiles, W. W.: Pleistocene changes in the pore concentration of a planktonic
foraminiferal species from the Pacific Ocean, Prog. Oceanogr., 4, 153–160,
1965.
Wolf-Gladrow, D. A., Riebesell, U., Burkhardt, S., and Buma, J.: Direct
effects of CO2 concentration on growth and isotopic composition of marine
plankton, Tellus B, 51, 461–476, 1999.
Woods Hole Oceanographic Institute: Sample AII-42-15-14, IGSN: WHO0006U5.
Woods Hole Oceanographic Institute: Sample CH-82-21, IGSN: WHO0002A9.
Zeebe, R. E., Bijma, J., and Wolf-Gladrow, D. A.: A diffusion-reaction model
of carbon isotope fractionation in foraminifera, Mar. Chem., 64,
199–227, 1999.
Short summary
Metabolic rates are sensitive to environmental conditions and can skew geochemical measurements. However, there is no way to track these rates through time. Here we investigate the controls of test porosity in planktonic foraminifera (organisms commonly used in paleoclimate studies) as a potential proxy for metabolic rate. We found that the porosity varies with body size and temperature, two key controls on metabolic rate, and that it can respond to rapid changes in ambient temperature.
Metabolic rates are sensitive to environmental conditions and can skew geochemical measurements....
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