Articles | Volume 18, issue 16
https://doi.org/10.5194/bg-18-4733-2021
© Author(s) 2021. 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-18-4733-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
20 Aug 2021
Research article |
| 20 Aug 2021
| 20 Aug 2021
Host-influenced geochemical signature in the parasitic foraminifera Hyrrokkin sarcophaga
Nicolai Schleinkofer
CORRESPONDING AUTHOR
Institut für Geowissenschaften, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Frankfurt Isotope and Element Research Center (FIERCE), Goethe-Universität Frankfurt, Frankfurt am Main, Germany
David Evans
Institut für Geowissenschaften, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Frankfurt Isotope and Element Research Center (FIERCE), Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Max Wisshak
Marine Research Department, Senckenberg am Meer, Wilhelmshaven,
Germany
Janina Vanessa Büscher
Department of Earth and Ocean Sciences, National University of Ireland Galway, Galway, Ireland
Department of Biological Oceanography, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Jens Fiebig
Institut für Geowissenschaften, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Frankfurt Isotope and Element Research Center (FIERCE), Goethe-Universität Frankfurt, Frankfurt am Main, Germany
André Freiwald
Marine Research Department, Senckenberg am Meer, Wilhelmshaven,
Germany
Sven Härter
Institut für Geowissenschaften, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Horst R. Marschall
Institut für Geowissenschaften, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Frankfurt Isotope and Element Research Center (FIERCE), Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Silke Voigt
Institut für Geowissenschaften, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Frankfurt Isotope and Element Research Center (FIERCE), Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Jacek Raddatz
Institut für Geowissenschaften, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Frankfurt Isotope and Element Research Center (FIERCE), Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Related authors
Nicolai Schleinkofer, Jacek Raddatz, André Freiwald, David Evans, Lydia Beuck, Andres Rüggeberg, and Volker Liebetrau
Biogeosciences, 16, 3565–3582, https://doi.org/10.5194/bg-16-3565-2019, https://doi.org/10.5194/bg-16-3565-2019, 2019
Short summary
Short summary
In this study we tried to correlate Na / Ca ratios from cold-water corals with environmental parameters such as salinity, temperature and pH. We do not observe a correlation between Na / Ca ratios and seawater salinity, but we do observe a strong correlation with temperature. Na / Ca data from warm-water corals (Porites spp.) and bivalves (Mytilus edulis) support this correlation, indicating that similar controls on the incorporation of sodium exist in these aragonitic organisms.
Iris Arndt, Jonathan Erez, David Evans, Tobias Erhardt, Adam Levi, and Wolfgang Müller
EGUsphere, https://doi.org/10.5194/egusphere-2025-3479, https://doi.org/10.5194/egusphere-2025-3479, 2025
This preprint is open for discussion and under review for Biogeosciences (BG).
Short summary
Short summary
This study explores daily geochemical variations in giant clam (Tridacna) shells from controlled, isotopically-labelled day-night growth experiments. Results show five times higher daytime calcification rates. Light availability and metabolic activity significantly influence elemental incorporation mechanisms. The findings enhance our understanding of clam geochemistry and growth dynamics, offering valuable insights for studies on past environmental changes.
Armelle Ballian, Maud J. M. Meijers, Isabelle Cojan, Damien Huyghe, Miguel Bernecker, Katharina Methner, Mattia Tagliavento, Jens Fiebig, and Andreas Mulch
Clim. Past, 21, 841–856, https://doi.org/10.5194/cp-21-841-2025, https://doi.org/10.5194/cp-21-841-2025, 2025
Short summary
Short summary
During the Middle Miocene, the Earth transitioned from a warm to a colder period, significantly impacting ecosystems and climate. We present a 23–13 Ma climate record of soil carbonates from a northern Mediterranean basin. We propose that rapid temperature shifts in our data result from changes in atmospheric circulation patterns. Our climate record aligns well with contemporaneous terrestrial European and global marine records, enhancing our understanding of Miocene climate dynamics.
Flavia Boscolo-Galazzo, David Evans, Elaine M. Mawbey, William R. Gray, Paul N. Pearson, and Bridget S. Wade
Biogeosciences, 22, 1095–1113, https://doi.org/10.5194/bg-22-1095-2025, https://doi.org/10.5194/bg-22-1095-2025, 2025
Short summary
Short summary
Here we compare the Mg / Ca and oxygen isotope signatures for 57 recent to fossil species of planktonic foraminifera for the last 15 Myr. We find the occurrence of lineage-specific offsets in Mg / Ca conservative between ancestor-descendent species. Taking into account species kinship significantly improves temperature reconstructions, and we suggest that the occurrence of Mg / Ca offsets in modern species results from their evolution when ocean properties were different from today's.
Jesse B. Walters, Joshu M. Garber, Aratz Beranoaguirre, Leo Millonig, Axel Gerdes, Tobias Grützner, and Horst R. Marschall
EGUsphere, https://doi.org/10.5194/egusphere-2025-366, https://doi.org/10.5194/egusphere-2025-366, 2025
Short summary
Short summary
Garnet U-Pb dating is useful for dating geologic events. However, contamination by U-rich minerals included in garnet is a risk. Inclusions are often spotted by high-U spikes or large errors in the age. We dated garnets in metamorphic rocks and calculated ages 10–15 Myr older than expected, reflecting contamination by the mineral zircon. We provide recommendations for identifying contamination and suggest that the bulk dating of zircon inclusions in garnet may also provide valuable information.
Sune G. Nielsen, Frieder Klein, Horst R. Marschall, Philip A. E. Pogge von Strandmann, and Maureen Auro
Solid Earth, 15, 1143–1154, https://doi.org/10.5194/se-15-1143-2024, https://doi.org/10.5194/se-15-1143-2024, 2024
Short summary
Short summary
Magnesium isotope ratios of arc lavas have been proposed as a proxy for serpentinite subduction, but uncertainties remain regarding their utility. Here we show that bulk serpentinite Mg isotope ratios are identical to the mantle, whereas the serpentinite mineral brucite is enriched in heavy Mg isotopes. Thus, Mg isotope ratios may only be used as serpentinite subduction proxies if brucite is preferentially mobilized from the slab at pressures and temperatures within the arc magma source region.
Madeleine L. Vickers, Morgan T. Jones, Jack Longman, David Evans, Clemens V. Ullmann, Ella Wulfsberg Stokke, Martin Vickers, Joost Frieling, Dustin T. Harper, Vincent J. Clementi, and IODP Expedition 396 Scientists
Clim. Past, 20, 1–23, https://doi.org/10.5194/cp-20-1-2024, https://doi.org/10.5194/cp-20-1-2024, 2024
Short summary
Short summary
The discovery of cold-water glendonite pseudomorphs in sediments deposited during the hottest part of the Cenozoic poses an apparent climate paradox. This study examines their occurrence, association with volcanic sediments, and speculates on the timing and extent of cooling, fitting this with current understanding of global climate during this period. We propose that volcanic activity was key to both physical and chemical conditions that enabled the formation of glendonites in these sediments.
Emilija Krsnik, Katharina Methner, Marion Campani, Svetlana Botsyun, Sebastian G. Mutz, Todd A. Ehlers, Oliver Kempf, Jens Fiebig, Fritz Schlunegger, and Andreas Mulch
Solid Earth, 12, 2615–2631, https://doi.org/10.5194/se-12-2615-2021, https://doi.org/10.5194/se-12-2615-2021, 2021
Short summary
Short summary
Here we present new surface elevation constraints for the middle Miocene Central Alps based on stable and clumped isotope geochemical analyses. Our reconstructed paleoelevation estimate is supported by isotope-enabled paleoclimate simulations and indicates that the Miocene Central Alps were characterized by a heterogeneous and spatially transient topography with high elevations locally exceeding 4000 m.
André Bahr, Monika Doubrawa, Jürgen Titschack, Gregor Austermann, Andreas Koutsodendris, Dirk Nürnberg, Ana Luiza Albuquerque, Oliver Friedrich, and Jacek Raddatz
Biogeosciences, 17, 5883–5908, https://doi.org/10.5194/bg-17-5883-2020, https://doi.org/10.5194/bg-17-5883-2020, 2020
Short summary
Short summary
We explore the sensitivity of cold-water corals (CWCs) to environmental changes utilizing a multiproxy approach on a coral-bearing sediment core from off southeastern Brazil. Our results reveal that over the past 160 kyr, CWCs flourished during glacial high-northern-latitude cold events (Heinrich stadials). These periods were associated with anomalous wet phases on the continent enhancing terrigenous nutrient and organic-matter supply to the continental margin, boosting food supply to the CWCs.
Gordon N. Inglis, Fran Bragg, Natalie J. Burls, Marlow Julius Cramwinckel, David Evans, Gavin L. Foster, Matthew Huber, Daniel J. Lunt, Nicholas Siler, Sebastian Steinig, Jessica E. Tierney, Richard Wilkinson, Eleni Anagnostou, Agatha M. de Boer, Tom Dunkley Jones, Kirsty M. Edgar, Christopher J. Hollis, David K. Hutchinson, and Richard D. Pancost
Clim. Past, 16, 1953–1968, https://doi.org/10.5194/cp-16-1953-2020, https://doi.org/10.5194/cp-16-1953-2020, 2020
Short summary
Short summary
This paper presents estimates of global mean surface temperatures and climate sensitivity during the early Paleogene (∼57–48 Ma). We employ a multi-method experimental approach and show that i) global mean surface temperatures range between 27 and 32°C and that ii) estimates of
bulkequilibrium climate sensitivity (∼3 to 4.5°C) fall within the range predicted by the IPCC AR5 Report. This work improves our understanding of two key climate metrics during the early Paleogene.
Bernd R. Schöne, Aliona E. Meret, Sven M. Baier, Jens Fiebig, Jan Esper, Jeffrey McDonnell, and Laurent Pfister
Hydrol. Earth Syst. Sci., 24, 673–696, https://doi.org/10.5194/hess-24-673-2020, https://doi.org/10.5194/hess-24-673-2020, 2020
Short summary
Short summary
We present the first annually resolved stable isotope record (1819–1998) from shells of Swedish river mussels. Data reflect hydrological processes in the catchment and changes in the isotope value of local precipitation. The latter is related to the origin of moisture from which precipitation formed (North Atlantic or the Arctic) and governed by large-scale atmospheric circulation patterns. Results help to better understand climate dynamics and constrain ecological changes in river ecosystems.
Ulrike Hanz, Claudia Wienberg, Dierk Hebbeln, Gerard Duineveld, Marc Lavaleye, Katriina Juva, Wolf-Christian Dullo, André Freiwald, Leonardo Tamborrino, Gert-Jan Reichart, Sascha Flögel, and Furu Mienis
Biogeosciences, 16, 4337–4356, https://doi.org/10.5194/bg-16-4337-2019, https://doi.org/10.5194/bg-16-4337-2019, 2019
Short summary
Short summary
Along the Namibian and Angolan margins, low oxygen conditions do not meet environmental ranges for cold–water corals and hence are expected to be unsuitable habitats. Environmental conditions show that tidal movements deliver water with more oxygen and high–quality organic matter, suggesting that corals compensate unfavorable conditions with availability of food. With the expected expansion of oxygen minimum zones in the future, this study provides an example how ecosystems cope with extremes.
Max Wisshak and Liane Hüne
Foss. Rec., 22, 77–90, https://doi.org/10.5194/fr-22-77-2019, https://doi.org/10.5194/fr-22-77-2019, 2019
Short summary
Short summary
Here, we describe an enigmatic new microfossil that was found encrusting a belemnite from the Middle Jurassic of the Falaises des Vaches Noires in Normandy, France. The organism has produced a conspicuous attachment etching on the belemnite for better adhesion and this trace fossil is new to science as well. Based on morphological criteria and the capacity to bioerode, the new microproblematicum can best be compared to encrusting bryozoans and foraminiferans.
Nicolai Schleinkofer, Jacek Raddatz, André Freiwald, David Evans, Lydia Beuck, Andres Rüggeberg, and Volker Liebetrau
Biogeosciences, 16, 3565–3582, https://doi.org/10.5194/bg-16-3565-2019, https://doi.org/10.5194/bg-16-3565-2019, 2019
Short summary
Short summary
In this study we tried to correlate Na / Ca ratios from cold-water corals with environmental parameters such as salinity, temperature and pH. We do not observe a correlation between Na / Ca ratios and seawater salinity, but we do observe a strong correlation with temperature. Na / Ca data from warm-water corals (Porites spp.) and bivalves (Mytilus edulis) support this correlation, indicating that similar controls on the incorporation of sodium exist in these aragonitic organisms.
Christopher J. Hollis, Tom Dunkley Jones, Eleni Anagnostou, Peter K. Bijl, Marlow Julius Cramwinckel, Ying Cui, Gerald R. Dickens, Kirsty M. Edgar, Yvette Eley, David Evans, Gavin L. Foster, Joost Frieling, Gordon N. Inglis, Elizabeth M. Kennedy, Reinhard Kozdon, Vittoria Lauretano, Caroline H. Lear, Kate Littler, Lucas Lourens, A. Nele Meckler, B. David A. Naafs, Heiko Pälike, Richard D. Pancost, Paul N. Pearson, Ursula Röhl, Dana L. Royer, Ulrich Salzmann, Brian A. Schubert, Hannu Seebeck, Appy Sluijs, Robert P. Speijer, Peter Stassen, Jessica Tierney, Aradhna Tripati, Bridget Wade, Thomas Westerhold, Caitlyn Witkowski, James C. Zachos, Yi Ge Zhang, Matthew Huber, and Daniel J. Lunt
Geosci. Model Dev., 12, 3149–3206, https://doi.org/10.5194/gmd-12-3149-2019, https://doi.org/10.5194/gmd-12-3149-2019, 2019
Short summary
Short summary
The Deep-Time Model Intercomparison Project (DeepMIP) is a model–data intercomparison of the early Eocene (around 55 million years ago), the last time that Earth's atmospheric CO2 concentrations exceeded 1000 ppm. Previously, we outlined the experimental design for climate model simulations. Here, we outline the methods used for compilation and analysis of climate proxy data. The resulting climate
atlaswill provide insights into the mechanisms that control past warm climate states.
Kim Alix Jakob, Jörg Pross, Christian Scholz, Jens Fiebig, and Oliver Friedrich
Clim. Past, 14, 1079–1095, https://doi.org/10.5194/cp-14-1079-2018, https://doi.org/10.5194/cp-14-1079-2018, 2018
Short summary
Short summary
Eastern equatorial Pacific (EEP) thermocline dynamics during the intensification of Northern Hemisphere glaciation (iNHG; ~ 2.5 Ma) currently remain unclear. In light of this uncertainty, we generated geochemical, faunal and sedimentological data for EEP Site 849 (~ 2.75–2.4 Ma). We recorded a thermocline depth change shortly before the final phase of the iNHG, which supports the hypothesis that tropical thermocline shoaling may have contributed to substantial Northern Hemisphere ice growth.
Max Wisshak and Christian Neumann
Foss. Rec., 21, 1–9, https://doi.org/10.5194/fr-21-1-2018, https://doi.org/10.5194/fr-21-1-2018, 2018
Short summary
Short summary
A new bioerosion trace fossil, the rosette-shaped microboring Neodendrina carnelia igen. et isp. n., is described from a giant clam (Tridacna maxima) discovered in Pleistocene to Holocene coral reef deposits of the Egyptian Red Sea coast. The trace was formed as a complex attachment scar after the host had ceased. The biological identity of the trace maker, probably either a benthic foraminiferan or a macrophyte, is discussed.
Max Wisshak, Jürgen Titschack, Wolf-Achim Kahl, and Peter Girod
Foss. Rec., 20, 173–199, https://doi.org/10.5194/fr-20-173-2017, https://doi.org/10.5194/fr-20-173-2017, 2017
Short summary
Short summary
The ongoing technical revolution in non-destructive 3-D visualisation via micro-computed tomography (micro-CT) finds a valuable application in the studies of bioerosion trace fossils, since their three-dimensional architecture lies hidden within hard substrates. Selected examples of such cases are illustrated by reference to bioerosion trace fossils preserved in Late Cretaceous belemnite guards from the European Chalk Province, including the description of two new trace fossil ichnospecies.
Michael J. Henehan, David Evans, Madison Shankle, Janet E. Burke, Gavin L. Foster, Eleni Anagnostou, Thomas B. Chalk, Joseph A. Stewart, Claudia H. S. Alt, Joseph Durrant, and Pincelli M. Hull
Biogeosciences, 14, 3287–3308, https://doi.org/10.5194/bg-14-3287-2017, https://doi.org/10.5194/bg-14-3287-2017, 2017
Short summary
Short summary
It is still unclear whether foraminifera (calcifying plankton that play an important role in cycling carbon) will have difficulty in making their shells in more acidic oceans, with different studies often reporting apparently conflicting results. We used live lab cultures, mathematical models, and fossil measurements to test this question, and found low pH does reduce calcification. However, we find this response is likely size-dependent, which may have obscured this response in other studies.
Daniel J. Lunt, Matthew Huber, Eleni Anagnostou, Michiel L. J. Baatsen, Rodrigo Caballero, Rob DeConto, Henk A. Dijkstra, Yannick Donnadieu, David Evans, Ran Feng, Gavin L. Foster, Ed Gasson, Anna S. von der Heydt, Chris J. Hollis, Gordon N. Inglis, Stephen M. Jones, Jeff Kiehl, Sandy Kirtland Turner, Robert L. Korty, Reinhardt Kozdon, Srinath Krishnan, Jean-Baptiste Ladant, Petra Langebroek, Caroline H. Lear, Allegra N. LeGrande, Kate Littler, Paul Markwick, Bette Otto-Bliesner, Paul Pearson, Christopher J. Poulsen, Ulrich Salzmann, Christine Shields, Kathryn Snell, Michael Stärz, James Super, Clay Tabor, Jessica E. Tierney, Gregory J. L. Tourte, Aradhna Tripati, Garland R. Upchurch, Bridget S. Wade, Scott L. Wing, Arne M. E. Winguth, Nicky M. Wright, James C. Zachos, and Richard E. Zeebe
Geosci. Model Dev., 10, 889–901, https://doi.org/10.5194/gmd-10-889-2017, https://doi.org/10.5194/gmd-10-889-2017, 2017
Short summary
Short summary
In this paper we describe the experimental design for a set of simulations which will be carried out by a range of climate models, all investigating the climate of the Eocene, about 50 million years ago. The intercomparison of model results is called 'DeepMIP', and we anticipate that we will contribute to the next IPCC report through an analysis of these simulations and the geological data to which we will compare them.
Claudia Färber, Jürgen Titschack, Christine Hanna Lydia Schönberg, Karsten Ehrig, Karin Boos, Daniel Baum, Bernhard Illerhaus, Ulla Asgaard, Richard Granville Bromley, André Freiwald, and Max Wisshak
Biogeosciences, 13, 3461–3474, https://doi.org/10.5194/bg-13-3461-2016, https://doi.org/10.5194/bg-13-3461-2016, 2016
Short summary
Short summary
In this study we present results from the first long-term bioerosion experiment (1–14 years of exposure) outside the tropical realm. A novel micro-CT approach was used to visualise and to quantify the development of macrobioerosion traces. After 14 years, 30 % of the original substrate volume was excavated chiefly by sponges. High spatio-temporal variability prohibited clear conclusions about the onset of macrobioerosion equilibrium conditions, calling for further long-term experiments.
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
Clim. Past Discuss., https://doi.org/10.5194/cp-2016-51, https://doi.org/10.5194/cp-2016-51, 2016
Manuscript not accepted for further review
Short summary
Short summary
A lack of knowledge on the timing of Late Cretaceous climatic change inhibits our understanding of underlying causal mechanisms. Therefore, we used an expanded deep ocean record from the North Atlantic that shows distinct sedimentary cyclicity suggesting orbital forcing. A high-resolution carbon-isotope record from bulk carbonates allows to identify global trends in the carbon cycle. Our new carbon isotope record and the established cyclostratigraphy may serve as a future reference site.
David Evans, Bridget S. Wade, Michael Henehan, Jonathan Erez, and Wolfgang Müller
Clim. Past, 12, 819–835, https://doi.org/10.5194/cp-12-819-2016, https://doi.org/10.5194/cp-12-819-2016, 2016
Short summary
Short summary
We show that seawater pH exerts a substantial control on planktic foraminifera Mg / Ca, a widely applied palaeothermometer. As a result, temperature reconstructions based on this proxy are likely inaccurate over climatic events associated with a significant change in pH. We examine the implications of our findings for hydrological and temperature shifts over the Paleocene-Eocene Thermal Maximum and for the degree of surface ocean precursor cooling before the Eocene-Oligocene transition.
N. A. G. M. van Helmond, A. Sluijs, J. S. Sinninghe Damsté, G.-J. Reichart, S. Voigt, J. Erbacher, J. Pross, and H. Brinkhuis
Clim. Past, 11, 495–508, https://doi.org/10.5194/cp-11-495-2015, https://doi.org/10.5194/cp-11-495-2015, 2015
Short summary
Short summary
Based on the chemistry and microfossils preserved in sediments deposited in a shallow sea, in the current Lower Saxony region (NW Germany), we conclude that changes in Earth’s orbit around the Sun led to enhanced rainfall and organic matter production. The additional supply of organic matter, depleting oxygen upon degradation, and freshwater, inhibiting the mixing of oxygen-rich surface waters with deeper waters, caused the development of oxygen-poor waters about 94 million years ago.
Related subject area
Biogeochemistry: Stable Isotopes & Other Tracers
Fungi present distinguishable isotopic signals in their lipids when grown on glycolytic versus tricarboxylic acid cycle intermediates
Sea ice and mixed layer depth influence on nitrate depletion and associated isotopic effects in the Drake Passage–Weddell Sea region, Southern Ocean
Hydrodynamic and Primary Production Effects on Seasonal DO Variability in the Danube River
Stable iron isotope signals indicate a “pseudo-abiotic” process driving deep iron release in methanic sediments
Triple oxygen isotope evidence for the pathway of nitrous oxide production in a forested soil with increased emission on rainy days
Variability in oxygen isotopic fractionation of enzymatic O2 consumption
Previous integrated or organic farming affects productivity and ecosystem N balance rather than fertilizer 15N allocation to plants and soil, leaching, or gaseous emissions (NH3, N2O, and N2)
How long does carbon stay in a near-pristine central Amazon forest? An empirical estimate with radiocarbon
No increase is detected and modeled for the seasonal cycle amplitude of δ13C of atmospheric carbon dioxide
Bias in calculating gross nitrification rates in forested catchments using the triple oxygen isotopic composition (Δ17O) of stream nitrate
Position-specific kinetic isotope effects for nitrous oxide: a new expansion of the Rayleigh model
Technical note: A Bayesian mixing model to unravel isotopic data and quantify trace gas production and consumption pathways for time series data – Time-resolved FRactionation And Mixing Evaluation (TimeFRAME)
Separating above-canopy CO2 and O2 measurements into their atmospheric and biospheric signatures
Climatic controls on leaf wax hydrogen isotope ratios in terrestrial and marine sediments along a hyperarid-to-humid gradient
Fractionation of stable carbon isotopes during microbial propionate consumption in anoxic rice paddy soils
Sources and sinks of carbonyl sulfide inferred from tower and mobile atmospheric observations in the Netherlands
Downpour dynamics: outsized impacts of storm events on unprocessed atmospheric nitrate export in an urban watershed
The hidden role of dissolved organic carbon in the biogeochemical cycle of carbon in modern redox-stratified lakes
Biogeochemical processes captured by carbon isotopes in redox-stratified water columns: a comparative study of four modern stratified lakes along an alkalinity gradient
Partitioning of carbon export in the euphotic zone of the oligotrophic South China Sea
Determination of respiration and photosynthesis fractionation factors for atmospheric dioxygen inferred from a vegetation–soil–atmosphere analogue of the terrestrial biosphere in closed chambers
Permafrost degradation and nitrogen cycling in Arctic rivers: insights from stable nitrogen isotope studies
Neodymium budget in the Mediterranean Sea: evaluating the role of atmospheric dusts using a high-resolution dynamical-biogeochemical model
Nitrate isotope investigations reveal future impacts of climate change on nitrogen inputs and cycling in Arctic fjords: Kongsfjorden and Rijpfjorden (Svalbard)
Mineralization of autochthonous particulate organic carbon is a fast channel of organic matter turnover in Germany's largest drinking water reservoir
Carbon isotopic ratios of modern C3 and C4 vegetation on the Indian peninsula and changes along the plant–soil–river continuum – implications for vegetation reconstructions
Controls on nitrite oxidation in the upper Southern Ocean: insights from winter kinetics experiments in the Indian sector
Tracing the source of nitrate in a forested stream showing elevated concentrations during storm events
Intra-skeletal variability in phosphate oxygen isotope composition reveals regional heterothermies in marine vertebrates
Isotopic differences in soil–plant–atmosphere continuum composition and control factors of different vegetation zones on the northern slope of the Qilian Mountains
An analysis of the variability in δ13C in macroalgae from the Gulf of California: indicative of carbon concentration mechanisms and isotope discrimination during carbon assimilation
Summertime productivity and carbon export potential in the Weddell Sea, with a focus on the waters adjacent to Larsen C Ice Shelf
Particulate biogenic barium tracer of mesopelagic carbon remineralization in the Mediterranean Sea (PEACETIME project)
Hydrogen and carbon isotope fractionation factors of aerobic methane oxidation in deep-sea water
Comparing modified substrate-induced respiration with selective inhibition (SIRIN) and N2O isotope approaches to estimate fungal contribution to denitrification in three arable soils under anoxic conditions
How are oxygen budgets influenced by dissolved iron and growth of oxygenic phototrophs in an iron-rich spring system? Initial results from the Espan Spring in Fürth, Germany
Stable isotope ratios in seawater nitrate reflect the influence of Pacific water along the northwest Atlantic margin
High-resolution 14C bomb peak dating and climate response analyses of subseasonal stable isotope signals in wood of the African baobab – a case study from Oman
Geographic variability in freshwater methane hydrogen isotope ratios and its implications for global isotopic source signatures
Seasonality of nitrogen sources, cycling, and loading in a New England river discerned from nitrate isotope ratios
Evaluating the response of δ13C in Haloxylon ammodendron, a dominant C4 species in Asian desert ecosystems, to water and nitrogen addition as well as the availability of its δ13C as an indicator of water use efficiency
Modern silicon dynamics of a small high-latitude subarctic lake
Radium-228-derived ocean mixing and trace element inputs in the South Atlantic
Nitrogen isotopic fractionations during nitric oxide production in an agricultural soil
Silicon uptake and isotope fractionation dynamics by crop species
Barium stable isotopes as a fingerprint of biological cycling in the Amazon River basin
Bottomland hardwood forest growth and stress response to hydroclimatic variation: evidence from dendrochronology and tree ring Δ13C values
N2O isotope approaches for source partitioning of N2O production and estimation of N2O reduction – validation with the 15N gas-flux method in laboratory and field studies
Technical note: Single-shell δ11B analysis of Cibicidoides wuellerstorfi using femtosecond laser ablation MC-ICPMS and secondary ion mass spectrometry
Biogeochemical evidence of anaerobic methane oxidation and anaerobic ammonium oxidation in a stratified lake using stable isotopes
Stanislav Jabinski, Vítězslav Kučera, Marek Kopáček, Jan Jansa, and Travis B. Meador
Biogeosciences, 22, 3127–3141, https://doi.org/10.5194/bg-22-3127-2025, https://doi.org/10.5194/bg-22-3127-2025, 2025
Short summary
Short summary
Microbial production is a key parameter in estimation of organic matter cycling in environmental systems, and fungi play a major role as decomposers. In order to improve investigation of fungal production and turnover times in environmental studies, we determined the isotopic signals encoded into lipid biomarkers of fungal pure cultures growing on various carbon substrates in media with isotopically labeled water and bicarbonate.
Aymeric P. M. Servettaz, Yuta Isaji, Chisato Yoshikawa, Yanghee Jang, Boo-Keun Khim, Yeongjun Ryu, Daniel M. Sigman, Nanako O. Ogawa, Francisco J. Jiménez-Espejo, and Naohiko Ohkouchi
Biogeosciences, 22, 2239–2260, https://doi.org/10.5194/bg-22-2239-2025, https://doi.org/10.5194/bg-22-2239-2025, 2025
Short summary
Short summary
Phytoplankton blooms occur after sea ice retreats in the Southern Ocean. In this study we investigate the influence of seasonal cycle of sea ice concentration on nitrate depletion, testing the hypothesis that meltwater release stabilizes the water column and favors nutrient utilization. We find that, at a regional scale, nitrate depletion and vertical mixing are weakly correlated with sea ice cycle. Nitrate depletion is rather linked to other oceanographic processes controlling mixing depth.
Jan Maier, Anna-Neva Visser, Christina Martina Schubert, Simon Thomas Wander, and Johannes Arthur Barth
EGUsphere, https://doi.org/10.5194/egusphere-2025-1580, https://doi.org/10.5194/egusphere-2025-1580, 2025
Short summary
Short summary
We present the first large-scale assessment of the dissolved oxygen (DO) budget and δ18ODO across the Danube to distinguish DO sources and sinks, key for biogeochemical cycles. Two highly productive areas in the warm season showed large deviations (+12.1 ‰) from atmospheric equilibrium (+24.6 ‰ ± 0.4 ‰), unusual for large rivers. Critically low DO in the Sava (0.16 mmol/L) and lower Danube (0.2 mmol/L) in late summer resulted from intensified respiration.
Susann Henkel, Bo Liu, Michael Staubwasser, Simone A. Kasemann, Anette Meixner, David A. Aromokeye, Michael W. Friedrich, and Sabine Kasten
Biogeosciences, 22, 1673–1696, https://doi.org/10.5194/bg-22-1673-2025, https://doi.org/10.5194/bg-22-1673-2025, 2025
Short summary
Short summary
We intend to unravel iron (Fe) reduction pathways in high-deposition methanic sediments because pools of Fe minerals could stimulate methane oxidation and also generation. Our data from the North Sea show that Fe release takes place mechanistically differently to Fe reduction in shallow sediments, which typically fractionates Fe isotopes. We conclude that fermentation of organic matter involving interspecies electron transfer, partly through conductive Fe oxides, could play an important role.
Weitian Ding, Urumu Tsunogai, Tianzheng Huang, Takashi Sambuichi, Wenhua Ruan, Masanori Ito, Hao Xu, Yongwon Kim, and Fumiko Nakagawa
EGUsphere, https://doi.org/10.21203/rs.3.rs-4264720/v2, https://doi.org/10.21203/rs.3.rs-4264720/v2, 2025
Short summary
Short summary
Identifying the pathways of N2O produced through nitrification and denitrification in soil is crucial for effective mitigation. Thus, we monitored a new natural isotopic signature (Δ17O) of N2O in forested soil for identifying the pathways, which is almost stable during various biogeochemical processes. Our results suggest Δ17O is a promising signature for identifying pathways of N2O production, revealing that increased denitrification drives the high emission of N2O in soil on rainy days.
Carolina F.M. de Carvalho, Moritz F. Lehmann, and Sarah G. Pati
EGUsphere, https://doi.org/10.5194/egusphere-2025-1193, https://doi.org/10.5194/egusphere-2025-1193, 2025
Short summary
Short summary
Using O2 stable isotope analysis, we determined the isotopic fractionation of biological O2 consumption by 10 flavin-dependent and 6 metalloenzymes. Metalloenzymes displayed a narrower range and lower values of isotopic fractionation than flavin-dependent enzymes. This work expands our understanding of the variability of oxygen isotopic fractionation at the enzyme level, improving the ability to study O2 dynamics from molecular to ecosystem scales.
Fawad Khan, Samuel Franco Luesma, Frederik Hartmann, Michael Dannenmann, Rainer Gasche, Clemens Scheer, Andreas Gattinger, Wiebke Niether, Elizabeth Gachibu Wangari, Ricky Mwangada Mwanake, Ralf Kiese, and Benjamin Wolf
EGUsphere, https://doi.org/10.5194/egusphere-2025-292, https://doi.org/10.5194/egusphere-2025-292, 2025
Short summary
Short summary
Crop rotations with legumes and use of organic and mineral fertilizers show potential to reduce agricultural N losses. This study examined N losses, including direct N2 flux, on two adjacent sites with different management history: organic farming (OF) with legume cultivation and integrated farming (IF) using synthetic and organic N inputs. IF increased soil organic carbon and nitrogen content, 15N recovery and showed a balanced N budget, i.e., more efficient N cycling compared to OF.
Ingrid Chanca, Ingeborg Levin, Susan Trumbore, Kita Macario, Jost Lavric, Carlos Alberto Quesada, Alessandro Carioca de Araújo, Cléo Quaresma Dias Júnior, Hella van Asperen, Samuel Hammer, and Carlos A. Sierra
Biogeosciences, 22, 455–472, https://doi.org/10.5194/bg-22-455-2025, https://doi.org/10.5194/bg-22-455-2025, 2025
Short summary
Short summary
Assessing the net carbon (C) budget of the Amazon entails considering the magnitude and timing of C absorption and losses through respiration (transit time of C). Radiocarbon-based estimates of the transit time of C in the Amazon Tall Tower Observatory (ATTO) suggest a change in the transit time from 6 ± 2 years and 18 ± 4 years within 2 years (October 2019 and December 2021, respectively). This variability indicates that only a fraction of newly fixed C can be stored for decades or longer.
Fortunat Joos, Sebastian Lienert, and Sönke Zaehle
Biogeosciences, 22, 19–39, https://doi.org/10.5194/bg-22-19-2025, https://doi.org/10.5194/bg-22-19-2025, 2025
Short summary
Short summary
How plants regulate their exchange of CO2 and water with the atmosphere under global warming is critical for their carbon uptake and their cooling influence. We analyze the isotope ratio of atmospheric CO2 and detect no significant decadal trends in the seasonal cycle amplitude. The data are consistent with the regulation towards leaf CO2 and intrinsic water use efficiency growing proportionally to atmospheric CO2, in contrast to recent suggestions of downregulation of CO2 and water fluxes.
Weitian Ding, Urumu Tsunogai, and Fumiko Nakagawa
Biogeosciences, 21, 4717–4722, https://doi.org/10.5194/bg-21-4717-2024, https://doi.org/10.5194/bg-21-4717-2024, 2024
Short summary
Short summary
Past studies have used the Δ17O of stream nitrate to estimate the gross nitrification rates (GNRs) in each forested catchment by approximating the Δ17O value of soil nitrate to be equal to that of stream nitrate. Based on inference and calculation of measured data, we found that this approximation resulted in an overestimated GNR. Therefore, it is essential to clarify and verify the Δ17O NO3− values in forested soils and streams before applying the Δ17O values of stream NO3− to GNR estimation.
Elise D. Rivett, Wenjuan Ma, Nathaniel E. Ostrom, and Eric L. Hegg
Biogeosciences, 21, 4549–4567, https://doi.org/10.5194/bg-21-4549-2024, https://doi.org/10.5194/bg-21-4549-2024, 2024
Short summary
Short summary
Many different processes produce nitrous oxide (N2O), a potent greenhouse gas. Measuring the ratio of heavy and light nitrogen isotopes (15N/14N) for the non-exchangeable central and outer N atoms of N2O helps to distinguish sources of N2O. To accurately calculate the position-specific isotopic preference, we developed an expansion of the widely used Rayleigh model. Application of our new model to simulated and experimental data demonstrates its improved accuracy for analyzing N2O synthesis.
Eliza Harris, Philipp Fischer, Maciej P. Lewicki, Dominika Lewicka-Szczebak, Stephen J. Harris, and Fernando Perez-Cruz
Biogeosciences, 21, 3641–3663, https://doi.org/10.5194/bg-21-3641-2024, https://doi.org/10.5194/bg-21-3641-2024, 2024
Short summary
Short summary
Greenhouse gases are produced and consumed via a number of pathways. Quantifying these pathways helps reduce the climate and environmental footprint of anthropogenic activities. The contribution of the pathways can be estimated from the isotopic composition, which acts as a fingerprint for these pathways. We have developed the Time-resolved FRactionation And Mixing Evaluation (TimeFRAME) model to simplify interpretation and estimate the contribution of different pathways and their uncertainty.
Kim A. P. Faassen, Jordi Vilà-Guerau de Arellano, Raquel González-Armas, Bert G. Heusinkveld, Ivan Mammarella, Wouter Peters, and Ingrid T. Luijkx
Biogeosciences, 21, 3015–3039, https://doi.org/10.5194/bg-21-3015-2024, https://doi.org/10.5194/bg-21-3015-2024, 2024
Short summary
Short summary
The ratio between atmospheric O2 and CO2 can be used to characterize the carbon balance at the surface. By combining a model and observations from the Hyytiälä forest (Finland), we show that using atmospheric O2 and CO2 measurements from a single height provides a weak constraint on the surface CO2 exchange because large-scale processes such as entrainment confound this signal. We therefore recommend always using multiple heights of O2 and CO2 measurements to study surface CO2 exchange.
Nestor Gaviria-Lugo, Charlotte Läuchli, Hella Wittmann, Anne Bernhardt, Patrick Frings, Mahyar Mohtadi, Oliver Rach, and Dirk Sachse
Biogeosciences, 20, 4433–4453, https://doi.org/10.5194/bg-20-4433-2023, https://doi.org/10.5194/bg-20-4433-2023, 2023
Short summary
Short summary
We analyzed how leaf wax hydrogen isotopes in continental and marine sediments respond to climate along one of the strongest aridity gradients in the world, from hyperarid to humid, along Chile. We found that under extreme aridity, the relationship between hydrogen isotopes in waxes and climate is non-linear, suggesting that we should be careful when reconstructing past hydrological changes using leaf wax hydrogen isotopes so as to avoid overestimating how much the climate has changed.
Ralf Conrad and Peter Claus
Biogeosciences, 20, 3625–3635, https://doi.org/10.5194/bg-20-3625-2023, https://doi.org/10.5194/bg-20-3625-2023, 2023
Short summary
Short summary
Knowledge of carbon isotope fractionation is important for the assessment of the pathways involved in the degradation of organic matter. Propionate is an important intermediate. In the presence of sulfate, it was degraded by Syntrophobacter species via acetate to CO2. In the absence of sulfate, it was mainly consumed by Smithella and methanogenic archaeal species via butyrate and acetate to CH4. However, stable carbon isotope fractionation during the degradation process was quite small.
Alessandro Zanchetta, Linda M. J. Kooijmans, Steven van Heuven, Andrea Scifo, Hubertus A. Scheeren, Ivan Mammarella, Ute Karstens, Jin Ma, Maarten Krol, and Huilin Chen
Biogeosciences, 20, 3539–3553, https://doi.org/10.5194/bg-20-3539-2023, https://doi.org/10.5194/bg-20-3539-2023, 2023
Short summary
Short summary
Carbonyl sulfide (COS) has been suggested as a tool to estimate carbon dioxide (CO2) uptake by plants during photosynthesis. However, understanding its sources and sinks is critical to preventing biases in this estimate. Combining observations and models, this study proves that regional sources occasionally influence the measurements at the 60 m tall Lutjewad tower (1 m a.s.l.; 53°24′ N, 6°21′ E) in the Netherlands. Moreover, it estimates nighttime COS fluxes to be −3.0 ± 2.6 pmol m−2 s−1.
Joel T. Bostic, David M. Nelson, and Keith N. Eshleman
Biogeosciences, 20, 2485–2498, https://doi.org/10.5194/bg-20-2485-2023, https://doi.org/10.5194/bg-20-2485-2023, 2023
Short summary
Short summary
Land-use changes can affect water quality. We used tracers of pollution sources and water flow paths to show that an urban watershed exports variable sources during storm events relative to a less developed watershed. Our results imply that changing precipitation patterns combined with increasing urbanization may alter sources of pollution in the future.
Robin Havas, Christophe Thomazo, Miguel Iniesto, Didier Jézéquel, David Moreira, Rosaluz Tavera, Jeanne Caumartin, Elodie Muller, Purificación López-García, and Karim Benzerara
Biogeosciences, 20, 2405–2424, https://doi.org/10.5194/bg-20-2405-2023, https://doi.org/10.5194/bg-20-2405-2023, 2023
Short summary
Short summary
Dissolved organic carbon (DOC) is a reservoir of prime importance in the C cycle of both continental and marine systems. It has also been suggested to influence the past Earth climate but is still poorly characterized in ancient-Earth-like environments. In this paper we show how DOC analyses from modern redox-stratified lakes can evidence specific metabolic reactions and environmental factors and how these can help us to interpret the C cycle of specific periods in the Earth's past.
Robin Havas, Christophe Thomazo, Miguel Iniesto, Didier Jézéquel, David Moreira, Rosaluz Tavera, Jeanne Caumartin, Elodie Muller, Purificación López-García, and Karim Benzerara
Biogeosciences, 20, 2347–2367, https://doi.org/10.5194/bg-20-2347-2023, https://doi.org/10.5194/bg-20-2347-2023, 2023
Short summary
Short summary
We describe the C cycle of four modern stratified water bodies from Mexico, a necessary step to better understand the C cycle of primitive-Earth-like environments, which were dominated by these kinds of conditions. We highlight the importance of local external factors on the C cycle of these systems. Notably, they influence the sensitivity of the carbonate record to environmental changes. We also show the strong C-cycle variability among these lakes and their organic C sediment record.
Yifan Ma, Kuanbo Zhou, Weifang Chen, Junhui Chen, Jin-Yu Terence Yang, and Minhan Dai
Biogeosciences, 20, 2013–2030, https://doi.org/10.5194/bg-20-2013-2023, https://doi.org/10.5194/bg-20-2013-2023, 2023
Short summary
Short summary
We distinguished particulate organic carbon (POC) export fluxes out of the nutrient-depleted layer (NDL) and the euphotic zone. The amount of POC export flux at the NDL base suggests that the NDL could be a hotspot of particle export. The substantial POC export flux at the NDL base challenges traditional concepts that the NDL was limited in terms of POC export. The dominant nutrient source for POC export fluxes should be subsurface nutrients, which was determined by 15N isotopic mass balance.
Clémence Paul, Clément Piel, Joana Sauze, Nicolas Pasquier, Frédéric Prié, Sébastien Devidal, Roxanne Jacob, Arnaud Dapoigny, Olivier Jossoud, Alexandru Milcu, and Amaëlle Landais
Biogeosciences, 20, 1047–1062, https://doi.org/10.5194/bg-20-1047-2023, https://doi.org/10.5194/bg-20-1047-2023, 2023
Short summary
Short summary
To improve the interpretation of the δ18Oatm and Δ17O of O2 in air bubbles in ice cores, we need to better quantify the oxygen fractionation coefficients associated with biological processes. We performed a simplified analogue of the terrestrial biosphere in a closed chamber. We found a respiration fractionation in agreement with the previous estimates at the microorganism scale, and a terrestrial photosynthetic fractionation was found. This has an impact on the estimation of the Dole effect.
Adam Francis, Raja S. Ganeshram, Robyn E. Tuerena, Robert G. M. Spencer, Robert M. Holmes, Jennifer A. Rogers, and Claire Mahaffey
Biogeosciences, 20, 365–382, https://doi.org/10.5194/bg-20-365-2023, https://doi.org/10.5194/bg-20-365-2023, 2023
Short summary
Short summary
Climate change is causing extensive permafrost degradation and nutrient releases into rivers with great ecological impacts on the Arctic Ocean. We focused on nitrogen (N) release from this degradation and associated cycling using N isotopes, an understudied area. Many N species are released at degradation sites with exchanges between species. N inputs from permafrost degradation and seasonal river N trends were identified using isotopes, helping to predict climate change impacts.
Mohamed Ayache, Jean-Claude Dutay, Kazuyo Tachikawa, Thomas Arsouze, and Catherine Jeandel
Biogeosciences, 20, 205–227, https://doi.org/10.5194/bg-20-205-2023, https://doi.org/10.5194/bg-20-205-2023, 2023
Short summary
Short summary
The neodymium (Nd) is one of the most useful tracers to fingerprint water mass provenance. However, the use of Nd is hampered by the lack of adequate quantification of the external sources. Here, we present the first simulation of dissolved Nd concentration and Nd isotopic composition in the Mediterranean Sea using a high-resolution model. We aim to better understand how the various external sources affect the Nd cycle and particularly assess how it is impacted by atmospheric inputs.
Marta Santos-Garcia, Raja S. Ganeshram, Robyn E. Tuerena, Margot C. F. Debyser, Katrine Husum, Philipp Assmy, and Haakon Hop
Biogeosciences, 19, 5973–6002, https://doi.org/10.5194/bg-19-5973-2022, https://doi.org/10.5194/bg-19-5973-2022, 2022
Short summary
Short summary
Terrestrial sources of nitrate are important contributors to the nutrient pool in the fjords of Kongsfjorden and Rijpfjorden in Svalbard during the summer, and they sustain most of the fjord primary productivity. Ongoing tidewater glacier retreat is postulated to favour light limitation and less dynamic circulation in fjords. This is suggested to encourage the export of nutrients to the middle and outer part of the fjord system, which may enhance primary production within and in offshore areas.
Marlene Dordoni, Michael Seewald, Karsten Rinke, Kurt Friese, Robert van Geldern, Jakob Schmidmeier, and Johannes A. C. Barth
Biogeosciences, 19, 5343–5355, https://doi.org/10.5194/bg-19-5343-2022, https://doi.org/10.5194/bg-19-5343-2022, 2022
Short summary
Short summary
Organic matter (OM) turnover into dissolved inorganic carbon (DIC) was investigated by means of carbon isotope mass balances in Germany's largest water reservoir. This includes a metalimnetic oxygen minimum (MOM). Autochthonous particulate organic carbon (POC) was the main contributor to DIC, with rates that were highest for the MOM. Generally low turnover rates outline the environmental fragility of this water body in the case that OM loads increase due to storm events or land use changes.
Frédérique M. S. A. Kirkels, Hugo J. de Boer, Paulina Concha Hernández, Chris R. T. Martes, Marcel T. J. van der Meer, Sayak Basu, Muhammed O. Usman, and Francien Peterse
Biogeosciences, 19, 4107–4127, https://doi.org/10.5194/bg-19-4107-2022, https://doi.org/10.5194/bg-19-4107-2022, 2022
Short summary
Short summary
The distinct carbon isotopic values of C3 and C4 plants are widely used to reconstruct past hydroclimate, where more C3 plants reflect wetter and C4 plants drier conditions. Here we examine the impact of regional hydroclimatic conditions on plant isotopic values in the Godavari River basin, India. We find that it is crucial to identify regional plant isotopic values and consider drought stress, which introduces a bias in C3 / C4 plant estimates and associated hydroclimate reconstructions.
Mhlangabezi Mdutyana, Tanya Marshall, Xin Sun, Jessica M. Burger, Sandy J. Thomalla, Bess B. Ward, and Sarah E. Fawcett
Biogeosciences, 19, 3425–3444, https://doi.org/10.5194/bg-19-3425-2022, https://doi.org/10.5194/bg-19-3425-2022, 2022
Short summary
Short summary
Nitrite-oxidizing bacteria in the winter Southern Ocean show a high affinity for nitrite but require a minimum (i.e., "threshold") concentration before they increase their rates of nitrite oxidation significantly. The classic Michaelis–Menten model thus cannot be used to derive the kinetic parameters, so a modified equation was employed that also yields the threshold nitrite concentration. Dissolved iron availability may play an important role in limiting nitrite oxidation.
Weitian Ding, Urumu Tsunogai, Fumiko Nakagawa, Takashi Sambuichi, Hiroyuki Sase, Masayuki Morohashi, and Hiroki Yotsuyanagi
Biogeosciences, 19, 3247–3261, https://doi.org/10.5194/bg-19-3247-2022, https://doi.org/10.5194/bg-19-3247-2022, 2022
Short summary
Short summary
Excessive leaching of nitrate from forested catchments during storm events degrades water quality and causes eutrophication in downstream areas. Thus, tracing the source of nitrate increase during storm events in forested streams is important for sustainable forest management. Based on the isotopic compositions of stream nitrate, including Δ17O, this study clarifies that the source of stream nitrate increase during storm events was soil nitrate in the riparian zone.
Nicolas Séon, Romain Amiot, Guillaume Suan, Christophe Lécuyer, François Fourel, Fabien Demaret, Arnauld Vinçon-Laugier, Sylvain Charbonnier, and Peggy Vincent
Biogeosciences, 19, 2671–2681, https://doi.org/10.5194/bg-19-2671-2022, https://doi.org/10.5194/bg-19-2671-2022, 2022
Short summary
Short summary
We analysed the oxygen isotope composition of bones and teeth of four marine species possessing regional heterothermies. We observed a consistent link between oxygen isotope composition and temperature heterogeneities recorded by classical methods. This opens up new perspectives on the determination of the thermoregulatory strategies of extant marine vertebrates where conventional methods are difficult to apply, but also allows us to investigate thermophysiologies of extinct vertebrates.
Yuwei Liu, Guofeng Zhu, Zhuanxia Zhang, Zhigang Sun, Leilei Yong, Liyuan Sang, Lei Wang, and Kailiang Zhao
Biogeosciences, 19, 877–889, https://doi.org/10.5194/bg-19-877-2022, https://doi.org/10.5194/bg-19-877-2022, 2022
Short summary
Short summary
We took the water cycle process of soil–plant–atmospheric precipitation as the research objective. In the water cycle of soil–plant–atmospheric precipitation, precipitation plays the main controlling role. The main source of replenishment for alpine meadow plants is precipitation and alpine meltwater; the main source of replenishment for forest plants is soil water; and the plants in the arid foothills mainly use groundwater.
Roberto Velázquez-Ochoa, María Julia Ochoa-Izaguirre, and Martín Federico Soto-Jiménez
Biogeosciences, 19, 1–27, https://doi.org/10.5194/bg-19-1-2022, https://doi.org/10.5194/bg-19-1-2022, 2022
Short summary
Short summary
Our research is the first approximation to understand the δ13C macroalgal variability in one of the most diverse marine ecosystems in the world, the Gulf of California. The life-form is the principal cause of δ13C macroalgal variability, mainly taxonomy. However, changes in habitat characteristics and environmental conditions also influence the δ13C macroalgal variability. The δ13C macroalgae is indicative of carbon concentration mechanisms and isotope discrimination during carbon assimilation.
Raquel F. Flynn, Thomas G. Bornman, Jessica M. Burger, Shantelle Smith, Kurt A. M. Spence, and Sarah E. Fawcett
Biogeosciences, 18, 6031–6059, https://doi.org/10.5194/bg-18-6031-2021, https://doi.org/10.5194/bg-18-6031-2021, 2021
Short summary
Short summary
Biological activity in the shallow Weddell Sea affects the biogeochemistry of recently formed deep waters. To investigate the drivers of carbon and nutrient export, we measured rates of primary production and nitrogen uptake, characterized the phytoplankton community, and estimated nutrient depletion ratios across the under-sampled western Weddell Sea in mid-summer. Carbon export was highest at the ice shelves and was determined by a combination of physical, chemical, and biological factors.
Stéphanie H. M. Jacquet, Christian Tamburini, Marc Garel, Aurélie Dufour, France Van Vambeke, Frédéric A. C. Le Moigne, Nagib Bhairy, and Sophie Guasco
Biogeosciences, 18, 5891–5902, https://doi.org/10.5194/bg-18-5891-2021, https://doi.org/10.5194/bg-18-5891-2021, 2021
Short summary
Short summary
We compared carbon remineralization rates (MRs) in the western and central Mediterranean Sea in late spring during the PEACETIME cruise, as assessed using the barium tracer. We reported higher and deeper (up to 1000 m depth) MRs in the western basin, potentially sustained by an additional particle export event driven by deep convection. The central basin is the site of a mosaic of blooming and non-blooming water masses and showed lower MRs that were restricted to the upper mesopelagic layer.
Shinsuke Kawagucci, Yohei Matsui, Akiko Makabe, Tatsuhiro Fukuba, Yuji Onishi, Takuro Nunoura, and Taichi Yokokawa
Biogeosciences, 18, 5351–5362, https://doi.org/10.5194/bg-18-5351-2021, https://doi.org/10.5194/bg-18-5351-2021, 2021
Short summary
Short summary
Hydrogen and carbon isotope ratios of methane as well as the relevant biogeochemical parameters and microbial community compositions in hydrothermal plumes in the Okinawa Trough were observed. We succeeded in simultaneously determining hydrogen and carbon isotope fractionation factors associated with aerobic oxidation of methane in seawater (εH = 49.4 ± 5.0 ‰, εC = 5.2 ± 0.4 ‰) – the former being the first of its kind ever reported.
Lena Rohe, Traute-Heidi Anderson, Heinz Flessa, Anette Goeske, Dominika Lewicka-Szczebak, Nicole Wrage-Mönnig, and Reinhard Well
Biogeosciences, 18, 4629–4650, https://doi.org/10.5194/bg-18-4629-2021, https://doi.org/10.5194/bg-18-4629-2021, 2021
Short summary
Short summary
This is the first experimental setup combining a complex set of methods (microbial inhibitors and isotopic approaches) to differentiate between N2O produced by fungi or bacteria during denitrification in three soils. Quantifying the fungal fraction with inhibitors was not successful due to large amounts of uninhibited N2O production. All successful methods suggested a small or missing fungal contribution. Artefacts occurring with microbial inhibition to determine N2O fluxes are discussed.
Inga Köhler, Raul E. Martinez, David Piatka, Achim J. Herrmann, Arianna Gallo, Michelle M. Gehringer, and Johannes A. C. Barth
Biogeosciences, 18, 4535–4548, https://doi.org/10.5194/bg-18-4535-2021, https://doi.org/10.5194/bg-18-4535-2021, 2021
Short summary
Short summary
We investigated how high Fe(II) levels influence the O2 budget of a circum-neutral Fe(II)-rich spring and if a combined study of dissolved O (DO) and its isotopic composition can help assess this effect. We showed that dissolved Fe(II) can exert strong effects on the δ18ODO even though a constant supply of atmospheric O2 occurs. In the presence of photosynthesis, direct effects of Fe oxidation become masked. Critical Fe(II) concentrations indirectly control the DO by enhancing photosynthesis.
Owen A. Sherwood, Samuel H. Davin, Nadine Lehmann, Carolyn Buchwald, Evan N. Edinger, Moritz F. Lehmann, and Markus Kienast
Biogeosciences, 18, 4491–4510, https://doi.org/10.5194/bg-18-4491-2021, https://doi.org/10.5194/bg-18-4491-2021, 2021
Short summary
Short summary
Pacific water flowing eastward through the Canadian Arctic plays an important role in redistributing nutrients to the northwest Atlantic Ocean. Using samples collected from northern Baffin Bay to the southern Labrador Shelf, we show that stable isotopic ratios in seawater nitrate reflect the fraction of Pacific to Atlantic water. These results provide a new framework for interpreting patterns of nitrogen isotopic variability recorded in modern and archival organic materials in the region.
Franziska Slotta, Lukas Wacker, Frank Riedel, Karl-Uwe Heußner, Kai Hartmann, and Gerhard Helle
Biogeosciences, 18, 3539–3564, https://doi.org/10.5194/bg-18-3539-2021, https://doi.org/10.5194/bg-18-3539-2021, 2021
Short summary
Short summary
The African baobab is a challenging climate and environmental archive for its semi-arid habitat due to dating uncertainties and parenchyma-rich wood anatomy. Annually resolved F14C data of tree-ring cellulose (1941–2005) from a tree in Oman show the annual character of the baobab’s growth rings but were up to 8.8 % lower than expected for 1964–1967. Subseasonal δ13C and δ18O patterns reveal years with low average monsoon rain as well as heavy rainfall events from pre-monsoonal cyclones.
Peter M. J. Douglas, Emerald Stratigopoulos, Sanga Park, and Dawson Phan
Biogeosciences, 18, 3505–3527, https://doi.org/10.5194/bg-18-3505-2021, https://doi.org/10.5194/bg-18-3505-2021, 2021
Short summary
Short summary
Hydrogen isotopes could be a useful tool to help resolve the geographic distribution of methane emissions from freshwater environments. We analyzed an expanded global dataset of freshwater methane hydrogen isotope ratios and found significant geographic variation linked to water isotopic composition. This geographic variability could be used to resolve changing methane fluxes from freshwater environments and provide more accurate estimates of the relative balance of global methane sources.
Veronica R. Rollinson, Julie Granger, Sydney C. Clark, Mackenzie L. Blanusa, Claudia P. Koerting, Jamie M. P. Vaudrey, Lija A. Treibergs, Holly C. Westbrook, Catherine M. Matassa, Meredith G. Hastings, and Craig R. Tobias
Biogeosciences, 18, 3421–3444, https://doi.org/10.5194/bg-18-3421-2021, https://doi.org/10.5194/bg-18-3421-2021, 2021
Short summary
Short summary
We measured nutrients and the naturally occurring nitrogen (N) and oxygen (O) stable isotope ratios of nitrate discharged from a New England river over an annual cycle, to monitor N loading and identify dominant sources from the watershed. We uncovered a seasonality to loading and sources of N from the watershed. Seasonality in the nitrate isotope ratios also informed on N cycling, conforming to theoretical expectations of riverine nutrient cycling.
Zixun Chen, Xuejun Liu, Xiaoqing Cui, Yaowen Han, Guoan Wang, and Jiazhu Li
Biogeosciences, 18, 2859–2870, https://doi.org/10.5194/bg-18-2859-2021, https://doi.org/10.5194/bg-18-2859-2021, 2021
Short summary
Short summary
δ13C in plants is a sensitive long-term indicator of physiological acclimatization. The present study suggests that precipitation change and increasing atmospheric N deposition have little impact on δ13C of H. ammodendron, a dominant plant in central Asian deserts, but affect its gas exchange. In addition, this study shows that δ13C of H. ammodendron could not indicate its water use efficiency (WUE), suggesting that whether δ13C of C4 plants indicates WUE is species-specific.
Petra Zahajská, Carolina Olid, Johanna Stadmark, Sherilyn C. Fritz, Sophie Opfergelt, and Daniel J. Conley
Biogeosciences, 18, 2325–2345, https://doi.org/10.5194/bg-18-2325-2021, https://doi.org/10.5194/bg-18-2325-2021, 2021
Short summary
Short summary
The drivers of high accumulation of single-cell siliceous algae (diatoms) in a high-latitude lake have not been fully characterized before. We studied silicon cycling of the lake through water, radon, silicon, and stable silicon isotope balances. Results showed that groundwater brings 3 times more water and dissolved silica than the stream inlet. We demonstrate that groundwater discharge and low sediment deposition have driven the high diatom accumulation in the studied lake in the past century.
Yu-Te Hsieh, Walter Geibert, E. Malcolm S. Woodward, Neil J. Wyatt, Maeve C. Lohan, Eric P. Achterberg, and Gideon M. Henderson
Biogeosciences, 18, 1645–1671, https://doi.org/10.5194/bg-18-1645-2021, https://doi.org/10.5194/bg-18-1645-2021, 2021
Short summary
Short summary
The South Atlantic near 40° S is one of the high-productivity and most dynamic nutrient regions in the oceans, but the sources and fluxes of trace elements (TEs) to this region remain unclear. This study investigates seawater Ra-228 and provides important constraints on ocean mixing and dissolved TE fluxes to this region. Vertical mixing is a more important source than aeolian or shelf inputs in this region, but particulate or winter deep-mixing inputs may be required to balance the TE budgets.
Zhongjie Yu and Emily M. Elliott
Biogeosciences, 18, 805–829, https://doi.org/10.5194/bg-18-805-2021, https://doi.org/10.5194/bg-18-805-2021, 2021
Short summary
Short summary
In this study, we demonstrated distinct nitrogen isotope effects for nitric oxide (NO) production from major microbial and chemical NO sources in an agricultural soil. These results highlight characteristic bond-forming and breaking mechanisms associated with microbial and chemical NO production and implicate that simultaneous isotopic analyses of NO and nitrous oxide (N2O) can lead to unprecedented insights into the sources and processes controlling NO and N2O emissions from agricultural soils.
Daniel A. Frick, Rainer Remus, Michael Sommer, Jürgen Augustin, Danuta Kaczorek, and Friedhelm von Blanckenburg
Biogeosciences, 17, 6475–6490, https://doi.org/10.5194/bg-17-6475-2020, https://doi.org/10.5194/bg-17-6475-2020, 2020
Short summary
Short summary
Silicon is taken up by some plants to increase structural stability and to develop stress resistance and is rejected by others. To explore the underlying mechanisms, we used the stable isotopes of silicon that shift in their relative abundance depending on the biochemical transformation involved. On species with a rejective (tomato, mustard) and active (wheat) uptake mechanism, grown in hydroculture, we found that the transport of silicic acid is controlled by the precipitation of biogenic opal.
Quentin Charbonnier, Julien Bouchez, Jérôme Gaillardet, and Éric Gayer
Biogeosciences, 17, 5989–6015, https://doi.org/10.5194/bg-17-5989-2020, https://doi.org/10.5194/bg-17-5989-2020, 2020
Short summary
Short summary
The abundance and isotope composition of the trace metal barium (Ba) allows us to track and quantify nutrient cycling throughout the Amazon Basin. In particular, we show that the Ba biological fingerprint evolves from that of a strong net nutrient uptake in the mountainous area of the Andes towards efficient nutrient recycling on the plains of the Lower Amazon. Our study highlights the fact that the geochemical signature of rock-derived nutrients transported by the Amazon is scarred by life.
Ajinkya G. Deshpande, Thomas W. Boutton, Ayumi Hyodo, Charles W. Lafon, and Georgianne W. Moore
Biogeosciences, 17, 5639–5653, https://doi.org/10.5194/bg-17-5639-2020, https://doi.org/10.5194/bg-17-5639-2020, 2020
Short summary
Short summary
Wetland forests in the southern USA are threatened by changing climate and human-induced pressures. We used tree ring widths and C isotopes as indicators of forest growth and physiological stress, respectively, and compared these to past climate data. We observed that vegetation growing in the drier patches is susceptible to stress, while vegetation growth and physiology in wetter patches is less sensitive to unfavorable environmental conditions, highlighting the importance of optimal wetness.
Dominika Lewicka-Szczebak, Maciej Piotr Lewicki, and Reinhard Well
Biogeosciences, 17, 5513–5537, https://doi.org/10.5194/bg-17-5513-2020, https://doi.org/10.5194/bg-17-5513-2020, 2020
Short summary
Short summary
We present the first validation of N2O isotopic approaches for estimating N2O source pathways and N2O reduction. These approaches are widely used for tracing soil nitrogen cycling, but the results of these estimations are very uncertain. Here we report the results from parallel treatments allowing for precise validation of these approaches, and we propose the best strategies for results interpretation, including the new idea of an isotope model integrating three isotopic signatures of N2O.
Markus Raitzsch, Claire Rollion-Bard, Ingo Horn, Grit Steinhoefel, Albert Benthien, Klaus-Uwe Richter, Matthieu Buisson, Pascale Louvat, and Jelle Bijma
Biogeosciences, 17, 5365–5375, https://doi.org/10.5194/bg-17-5365-2020, https://doi.org/10.5194/bg-17-5365-2020, 2020
Short summary
Short summary
The isotopic composition of boron in carbonate shells of marine unicellular organisms is a popular tool to estimate seawater pH. Usually, many shells need to be dissolved and measured for boron isotopes, but the information on their spatial distribution is lost. Here, we investigate two techniques that allow for measuring boron isotopes within single shells and show that they yield robust mean values but provide additional information on the heterogeneity within and between single shells.
Florian Einsiedl, Anja Wunderlich, Mathieu Sebilo, Ömer K. Coskun, William D. Orsi, and Bernhard Mayer
Biogeosciences, 17, 5149–5161, https://doi.org/10.5194/bg-17-5149-2020, https://doi.org/10.5194/bg-17-5149-2020, 2020
Short summary
Short summary
Nitrate pollution of freshwaters and methane emissions into the atmosphere are crucial factors in deteriorating the quality of drinking water and in contributing to global climate change. Here, we report vertical concentration and stable isotope profiles of CH4, NO3-, NO2-, and NH4+ in the water column of Fohnsee (southern Bavaria, Germany) that may indicate linkages between nitrate-dependent anaerobic methane oxidation and the anaerobic oxidation of ammonium.
Cited articles
Addadi, L., Raz, S., and Weiner, S.: Taking Advantage of Disorder: Amorphous
Calcium Carbonate and Its Roles in Biomineralization, Adv. Mater.,
15, 959–970, https://doi.org/10.1002/adma.200300381, 2003.
Addadi, L., Joester, D., Nudelman, F., and Weiner, S.: Mollusk Shell
Formation: A Source of New Concepts for Understanding Biomineralization
Processes, Chemistry, 12, 980–987,
https://doi.org/10.1002/chem.200500980, 2006.
Addamo, A. M., Vertino, A., Stolarski, J., García-Jiménez, R.,
Taviani, M., and Machordom, A.: Merging scleractinian genera: The
overwhelming genetic similarity between solitary Desmophyllum and colonial
Lophelia, BMC Evol. Biol., 16, 108,
https://doi.org/10.1186/s12862-016-0654-8, 2016.
Adkins, J. F., Boyle, E. A., Curry, W. B., and Lutringer, A.: Stable
isotopes in deep-sea corals and a new mechanism for “vital effects”,
Geochim. Cosmochim. Ac., 67, 1129–1143,
https://doi.org/10.1016/S0016-7037(02)01203-6, 2003.
Alexander, S. P. and Delaca, T. E.: Feeding adaptations of the foraminiferan
Cibicides refulgens living epizoically and parasitically on the Antarctic
scallop Adamussium colbecki, Biol. Bull., 173, 136–159,
https://doi.org/10.2307/1541868, 1987.
Allen, J. A.: Manganese deposition on the shells of living molluscs, Nature,
185, 336–337, https://doi.org/10.1038/185336b0, 1960.
Bajnai, D., Fiebig, J., Tomašových, A., Milner Garcia, S.,
Rollion-Bard, C., Raddatz, J., Löffler, N., Primo-Ramos, C., and Brand,
U.: Assessing kinetic fractionation in brachiopod calcite using clumped
isotopes, Sci. Rep., 8, 533,
https://doi.org/10.1038/s41598-017-17353-7, 2018.
Baranwal, S., Sauer, S., Knies, J., Chand, S., Jensen, H., and Klug, M.:
Benthic foraminifera as tools in interpretation of subsurface hydrocarbon
fluid flow at Veslemøy High and Hola-Vesterålen areas of the Barents
Sea, EGU General Assembly 2014, 27 April–2 May, 2014, Vienna, Austria, Geophysical Research Abstracts, id.1843, 2014.
Bentov, S. and Erez, J.: Impact of biomineralization processes on the Mg
content of foraminiferal shells: A biological perspective,
Geochem. Geophy. Geosy., 7, Q01P08, https://doi.org/10.1029/2005GC001015, 2006.
Beuck, L., López Correa, M., and Freiwald, A.: Biogeographical
distribution of Hyrrokkin (Rosalinidae, Foraminifera) and its host-specific
morphological and textural trace variability, in: Current Developments in
Bioerosion, edited by: Wisshak, M. and Tapanila, L., Springer, Berlin, Heidelberg, Germany, 329–360, https://doi.org/10.1007/978-3-540-77598-0_17, 2008.
Büscher, J.: Cold-water coral habitat characterisation and in situ
physiological state analyses of four spatially distinct reefs in North- and
mid-Norway-Cruise Report RV POSEIDON 525 [POS525], GEOMAR, Kiel, Germany,
https://doi.org/10.3289/CR_POS525, 2018.
Calvert, S. E. and Pedersen, T. F.: Geochemistry of Recent oxic and anoxic
marine sediments: Implications for the geological record, Mar. Geol.,
https://doi.org/10.1016/0025-3227(93)90150-T, 1993.
Calvert, S. E. and Pedersen, T. F.: Sedimentary geochemistry of manganese:
Implications for the environment of formation of manganiferous black shales,
Econ. Geol., 91, 36–47, https://doi.org/10.2113/gsecongeo.91.1.36, 1996.
Carré, M., Bentaleb, I., Bruguier, O., Ordinola, E., Barrett, N. T., and
Fontugne, M.: Calcification rate influence on trace element concentrations
in aragonitic bivalve shells: Evidences and mechanisms, Geochim. Cosmochim. Ac., 70, 4906–4920,
https://doi.org/10.1016/j.gca.2006.07.019, 2006.
Cedhagen, T.: Taxonomy and biology of hyrrokkin sarcophaga gen. Et Sp. N., a
parasitic foraminiferan (rosalinidae), Sarsia, 79, 65–82,
https://doi.org/10.1080/00364827.1994.10413549, 1994.
Checa, A. G., Rodríguez-Navarro, A. B., and Esteban-Delgado, F. J.: The
nature and formation of calcitic columnar prismatic shell layers in
pteriomorphian bivalves, Biomaterials, 26, 6404–6414,
https://doi.org/10.1016/j.biomaterials.2005.04.016, 2005.
Chen, S., Gagnon, A. C., and Adkins, J. F.: Carbonic anhydrase, coral
calcification and a new model of stable isotope vital effects, Geochim. Cosmochim. Ac., 236, 179–197, https://doi.org/10.1016/j.gca.2018.02.032,
2018.
Cheng, Y. R. and Dai, C. F.: A bioeroding foraminifer, Hyrrokkin sarcophaga,
on deepwater corals from the South China Sea, Coral Reefs, 35, 901,
https://doi.org/10.1007/s00338-016-1447-7, 2016.
Cohen, A. L.: Geochemical Perspectives on Coral Mineralization,
Rev. Mineral. Geochem., 54, 151–187, https://doi.org/10.2113/0540151,
2003.
Crenshaw, M. A.: The inorganic composition of molluscan extrapallial fluid,
Biol. Bull., 143, 506–512, https://doi.org/10.2307/1540180,
1972.
Culver, S. J.: Early Cambrian foraminifera from West Africa, Science, 254,
689–691, https://doi.org/10.1126/science.254.5032.689, 1991.
de Nooijer, L. J., Toyofuku, T., and Kitazato, H.: Foraminifera promote
calcification by elevating their intracellular pH, P. Natl. Acad. Sci. USA, 106, 15374–15378, https://doi.org/10.1073/pnas.0904306106, 2009.
de Nooijer, L. J., Spero, H. J., Erez, J., Bijma, J., and Reichart, G. J.:
Biomineralization in perforate foraminifera, Earth-Sci. Rev., 135,
48–58, https://doi.org/10.1016/j.earscirev.2014.03.013, 2014.
de Villiers, S., Nelson, B. K., and Chivas, A.: Biological Control on Coral
Sr
Dupuy, C., Rossignol, L., Geslin, E., and Pascal, P. Y.: Predation of
mudflat meio-macrofaunal metazoans by a calcareous foraminifer, Ammonia
tepida (Cushman, 1926), J. Foramin. Res., 40, 305–312,
https://doi.org/10.2113/gsjfr.40.4.305, 2010.
Elderfield, H.: A biomineralization model for the incorporation of trace
elements into foraminiferal calcium carbonate,
Earth Planet. Sc. Lett., 142, 409–423, https://doi.org/10.1016/0012-821X(96)00105-7, 1996.
Erez, J.: The Source of Ions for Biomineralization in Foraminifera and Their
Implications for Paleoceanographic Proxies, Rev. Mineral. Geochem., 54, 115–149, https://doi.org/10.2113/0540115, 2003.
Evans, D., Erez, J., Oron, S., and Müller, W.: Mg
Evans, D., Müller, W., and Erez, J.: Assessing foraminifera
biomineralisation models through trace element data of cultures under
variable seawater chemistry, Geochim. Cosmochim. Ac., 236, 198–217,
https://doi.org/10.1016/j.gca.2018.02.048, 2018.
Falini, G., Albeck, S., Weiner, S., and Addadi, L.: Control of Aragonite or
Calcite Polymorphism by Mollusk Shell Macromolecules, Science, 271, 67–69,
https://doi.org/10.1126/science.271.5245.67, 1996.
Ferrier-Pagès, C., Boisson, F., Allemand, D., and Tambutté, E.:
Kinetics of strontium uptake in the scleractinian coral Stylophora
pistillata, Mar. Ecol. Prog. Ser., 245, 93–100,
https://doi.org/10.3354/meps245093, 2002.
Form, A. U., Büscher, J. v., Hissmann, K., Flögel, S., Wisshak, M.,
Rüggeberg, A., Bannister, R., Kutti, T., Stapp, L., Bennecke, S.,
Küter, M., Nachtigall, K., Schauer, J., and Fenske, M.: RV POSEIDON
Cruise Report POS473 LORELEI II: LOphelia REef Lander Expedition and
Investigation II, Tromsø – Bergen – Esbjerg, 15–31 August–4 September 2014, 25 pp., https://doi.org/10.3289/CR_POS_473, 2015.
Freiwald, A. and Schönfeld, J.: Substrate pitting and boring pattern of
Hyrrokkin sarcophaga Cedhagen, 1994 (Foraminifera) in a modern deep-water
coral reef mound, Mar. Micropaleontol., 28, 199–207, 1996.
Füger, A., Konrad, F., Leis, A., Dietzel, M., and Mavromatis, V.: Effect
of growth rate and pH on lithium incorporation in calcite, Geochim. Cosmochim. Ac., 248, 14–24, https://doi.org/10.1016/j.gca.2018.12.040,
2019.
Füllenbach, C. S., Schöne, B. R., Shirai, K., Takahata, N., Ishida,
A., and Sano, Y.: Minute co-variations of Sr
Gabitov, R. I., Cohen, A. L., Gaetani, G. A., Holcomb, M., and Watson, E.
B.: The impact of crystal growth rate on element ratios in aragonite: An
experimental approach to understanding vital effects, Geochim. Cosmochim. Ac., 70, A187, https://doi.org/10.1016/j.gca.2006.06.377,
2006.
Gabitov, R. I., Sadekov, A., and Leinweber, A.: Crystal growth rate effect
on Mg
García-Gallardo, Á., Grunert, P., Voelker, A. H. L., Mendes, I.,
and Piller, W. E.: Re-evaluation of the “elevated epifauna” as indicator
of Mediterranean Outflow Water in the Gulf of Cadiz using stable isotopes
(δ13C, δ18O), Global Planet. Change, 155, 78–97,
https://doi.org/10.1016/j.gloplacha.2017.06.005, 2017.
Geerken, E., de Nooijer, L. J., van Dijk, I., and Reichart, G.-J.: Impact of salinity on element incorporation in two benthic foraminiferal species with contrasting magnesium contents, Biogeosciences, 15, 2205–2218, https://doi.org/10.5194/bg-15-2205-2018, 2018.
GEOMAR Helmholtz-Zentrum für Ozeanforschung: Research Vessel POSEIDON,
Journal of large-scale research facilities JLSRF, 1, 60–63,
https://doi.org/10.17815/jlsrf-1-62, 2015.
GEOMAR Helmholtz-Zentrum für Ozeanforschung: Manned submersible
“JAGO”, Journal of large-scale research facilities JLSRF, 3,
1–12, https://doi.org/10.17815/jlsrf-3-157, 2017.
Goldstein, J. I., Newbury, D. E., Michael, J. R., Ritchie, N. W. M., Scott,
J. H. J., and Joy, D. C.: Scanning Electron Microscopy and X-Ray
Microanalysis, Springer New York, New York, NY, USA,
https://doi.org/10.1007/978-1-4939-6676-9, 2018.
Goldstein, S. T.: Foraminifera: A biological overview, in: Modern
Foraminifera, Springer Netherlands, 37–55, https://doi.org/10.1007/0-306-48104-9_3, 1999.
Gray, W. R. and Evans, D.: Nonthermal Influences on Mg
Greaves, M., Barker, S., Daunt, C., and Elderfield, H.: Accuracy,
standardization, and interlaboratory calibration standards for foraminiferal
Mg
Greaves, M., Caillon, N., Rebaubier, H., Bartoli, G., Bohaty, S., Cacho, I.,
Clarke, L., Cooper, M., Daunt, C., Delaney, M., DeMenocal, P., Dutton, A.,
Eggins, S., Elderfield, H., Garbe-Schoenberg, D., Goddard, E., Green, D.,
Groeneveld, J., Hastings, D., Hathorne, E., Kimoto, K., Klinkhammer, G.,
Labeyrie, L., Lea, D. W., Marchitto, T., Martínez-Botí, M. A.,
Mortyn, P. G., Ni, Y., Nuernberg, D., Paradis, G., Quinn, T., Rosenthal, Y.,
Russel, A., Sagawa, T., Sosdian, S., Stott, L., Tachikawa, K., Tappa, E.,
Thunell, R., and Wilson, P. A.: Interlaboratory comparison study of
calibration standards for foraminiferal Mg
Groeneveld, J. and Filipsson, H. L.: Mg/Ca and Mn/Ca ratios in benthic foraminifera: the potential to reconstruct past variations in temperature and hypoxia in shelf regions, Biogeosciences, 10, 5125–5138, https://doi.org/10.5194/bg-10-5125-2013, 2013.
Gussone, N., Filipsson, H. L., and Kuhnert, H.: Mg
Halloran, B. A. and Donachy, J. E.: Characterization of organic matrix
macromolecules from the shells of the antarctic scallop, Adamussium
colbecki, Comp. Biochem. Phys. B:, 111, 221–231, https://doi.org/10.1016/0305-0491(94)00245-P, 1995.
Hancock, L. G., Walker, S. E., Pérez-Huerta, A., and Bowser, S. S.:
Population Dynamics and Parasite Load of a Foraminifer on Its Antarctic
Scallop Host with Their Carbonate Biomass Contributions, PLOS ONE, 10,
e0132534, https://doi.org/10.1371/journal.pone.0132534, 2015.
Holland, K., Eggins, S. M., Hönisch, B., Haynes, L. L., and Branson, O.:
Calcification rate and shell chemistry response of the planktic foraminifer
Orbulina universa to changes in microenvironment seawater carbonate
chemistry, Earth Planet. Sc. Lett., 464, 124–134,
https://doi.org/10.1016/j.epsl.2017.02.018, 2017.
Hönisch, B., Allen, K. A., Russell, A. D., Eggins, S. M., Bijma, J.,
Spero, H. J., Lea, D. W., and Yu, J.: Planktic foraminifers as recorders of
seawater Ba
Immenhauser, A., Schöne, B. R., Hoffmann, R., and Niedermayr, A.:
Mollusc and brachiopod skeletal hard parts: Intricate archives of their
marine environment, Sedimentology, 63, 1–59,
https://doi.org/10.1111/sed.12231, 2016.
Jacob, D. E., Wirth, R., Soldati, A. L., Wehrmeister, U., and Schreiber, A.:
Amorphous calcium carbonate in the shells of adult Unionoida, J.
Struct. Biol., 173, 241–249,
https://doi.org/10.1016/j.jsb.2010.09.011, 2011.
Jacob, D. E., Wirth, R., Agbaje, O. B. A., Branson, O., and Eggins, S. M.:
Planktic foraminifera form their shells via metastable carbonate phases,
Nat. Commun., 8, 1–8, https://doi.org/10.1038/s41467-017-00955-0,
2017.
Jacobson, P.: Physical Oceanography of the Trondheimsfjord, Geophys.
Astro. Fluid, 26, 3–26,
https://doi.org/10.1080/03091928308221761, 1983.
Jochum, K. P., Nohl, U., Herwig, K., Lammel, E., Stoll, B., and Hofmann, A.
W.: GeoReM: A New Geochemical Database for Reference Materials and Isotopic
Standards, Geostand. Geoanal. Res., 29, 333–338,
https://doi.org/10.1111/j.1751-908X.2005.tb00904.x, 2005.
Kato, K., Wada, H., and Fujioka, K.: The application of chemical staining to
separate calcite and aragonite minerals for micro-scale isotopic analyses,
Geochem. J., 37, 291–297, https://doi.org/10.2343/geochemj.37.291,
2003.
Klein, R. T., Lohmann, K. C., and Thayer, C. W.: Sr
Koho, K. A., de Nooijer, L. J., and Reichart, G. J.: Combining benthic
foraminiferal ecology and shell Mn
Lantz, B.: The impact of sample non-normality on ANOVA and alternative
methods, Brit. J. Math. Stat. Psy., 66,
224–244, https://doi.org/10.1111/j.2044-8317.2012.02047.x, 2013.
Lear, C. H. and Rosenthal, Y.: Benthic foraminiferal Li
Lear, C. H., Rosenthal, Y., and Slowey, N.: Benthic foraminiferal
Mg
Lorens, R. B.: Sr, Cd, Mn and Co distribution coefficients in calcite as a
function of calcite precipitation rate, Geochim. Cosmochim. Ac., 45,
553–561, https://doi.org/10.1016/0016-7037(81)90188-5, 1981.
Lorens, R. B. and Bender, M. L.: The impact of solution chemistry on
Mytilus edulis calcite and aragonite, Geochim. Cosmochim. Ac., 44, 1265–1278,
https://doi.org/10.1016/0016-7037(80)90087-3, 1980.
Lorrain, A., Gillikin, D. P., Paulet, Y. M., Chauvaud, L., le Mercier, A.,
Navez, J., and André, L.: Strong kinetic effects on Sr
Mackensen, A. and Nam, S.: Taxon-specific epibenthic foraminiferal
δ18O in the Arctic Ocean: Relationship to water masses, deep
circulation, and brine release, Mar. Micropaleontol., 113, 34–43,
https://doi.org/10.1016/j.marmicro.2014.09.002, 2014.
Marchitto, T. M., Curry, W. B., Lynch-Stieglitz, J., Bryan, S. P., Cobb, K.
M., and Lund, D. C.: Improved oxygen isotope temperature calibrations for
cosmopolitan benthic foraminifera, Geochim. Cosmochim. Ac., 130,
1–11, https://doi.org/10.1016/j.gca.2013.12.034, 2014.
Marin, F., Luquet, G., Marie, B., and Medakovic, D.: Molluscan Shell
Proteins: Primary Structure, Origin, and Evolution, Curr. Top.
Dev. Biol., 80, 209–276,
https://doi.org/10.1016/S0070-2153(07)80006-8, 2007.
McConnaughey, T. A.: Sub-equilibrium oxygen-18 and carbon-13 levels in
biological carbonates: Carbonate and kinetic models, Coral Reefs, 22,
316–327, https://doi.org/10.1007/s00338-003-0325-2, 2003.
McCorkle, D. C., Corliss, B. H., and Farnham, C. A.: Vertical distributions
and stable isotopic compositions of live (stained) benthic foraminifera from
the North Carolina and California continental margins, Deep-Sea Res. Pt. I, 44, 983–1024, https://doi.org/10.1016/S0967-0637(97)00004-6, 1997.
McCulloch, M., Falter, J., Trotter, J., and Montagna, P.: Coral resilience
to ocean acidification and global warming through pH up-regulation, Nat.
Clim. Change, 2, 623–627, https://doi.org/10.1038/nclimate1473, 2012.
Mienis, F., de Stigter, H. C., White, M., Duineveld, G., de Haas, H., and
van Weering, T. C. E.: Hydrodynamic controls on cold-water coral growth and
carbonate-mound development at the SW and SE Rockall Trough Margin, NE
Atlantic Ocean, Deep-Sea Res. Pt. I, 54,
1655–1674, https://doi.org/10.1016/j.dsr.2007.05.013, 2007.
Milzer, G., Giraudeau, J., Faust, J., Knies, J., Eynaud, F., and Rühlemann, C.: Spatial distribution of benthic foraminiferal stable isotopes and dinocyst assemblages in surface sediments of the Trondheimsfjord, central Norway, Biogeosciences, 10, 4433–4448, https://doi.org/10.5194/bg-10-4433-2013, 2013.
Moradian-Oldak, J., Addadi, L., Weiner, S., and Berman, A.: Tuning of
Crystal Nucleation and Growth by Proteins: Molecular Interactions at
Solid-Liquid Interfaces in Biomineralization, Croat. Chem. Acta, 63,
539–544, 1990.
Mucci, A.: Manganese uptake during calcite precipitation from seawater:
Conditions leading to the formation of a pseudokutnahorite, Geochim. Cosmochim. Ac., 52, 1859–1868,
https://doi.org/10.1016/0016-7037(88)90009-9, 1988.
Mucci, A. and Morse, J. W.: The incorporation of Mg2+ and Sr2+ into
calcite overgrowths: influences of growth rate and solution composition,
Geochim. Cosmochim. Ac., 47, 217–233, 1983.
Nakahara, H.: Nacre Formation in Bivalve and Gastropod Molluscs, in:
Mechanisms and Phylogeny of Mineralization in Biological Systems, Springer
Japan, Tokyo, 343–350, https://doi.org/10.1007/978-4-431-68132-8_55, 1991.
Nehrke, G., Keul, N., Langer, G., de Nooijer, L. J., Bijma, J., and Meibom, A.: A new model for biomineralization and trace-element signatures of Foraminifera tests, Biogeosciences, 10, 6759–6767, https://doi.org/10.5194/bg-10-6759-2013, 2013.
Oomori, T., Kaneshima, H., Maezato, Y., and Kitano, Y.: Distribution
Coefficient of Mg2+ ions between calcite and solution at 10–50 ∘C, Mar. Chem., 20, 327–336,
https://doi.org/10.1016/B978-044452228-3/50006-6, 1987.
Petersen, J., Barras, C., Bézos, A., La, C., de Nooijer, L. J., Meysman, F. J. R., Mouret, A., Slomp, C. P., and Jorissen, F. J.: Mn∕Ca intra- and inter-test variability in the benthic foraminifer Ammonia tepida, Biogeosciences, 15, 331–348, https://doi.org/10.5194/bg-15-331-2018, 2018.
Piez, K. A.: Amino Acid Composition of Some Calcified Proteins, Science,
134, 841–842, https://doi.org/10.1126/science.134.3482.841, 1961.
Pytkowicz, R. M.: Rates of Inorganic Calcium Carbonate Nucleation,
J. Geol., 73, 196–199, https://doi.org/10.1086/627056, 1965.
Raddatz, J., Rüggeberg, A., Margreth, S., and Dullo, W. C.:
Paleoenvironmental reconstruction of Challenger Mound initiation in the
Porcupine Seabight, NE Atlantic, Mar. Geol., 282, 79–90,
https://doi.org/10.1016/j.margeo.2010.10.019, 2011.
Raddatz, J., Liebetrau, V., Rüggeberg, A., Hathorne, E.,
Krabbenhöft, A., Eisenhauer, A., Böhm, F., Vollstaedt, H., Fietzke,
J., López Correa, M., Freiwald, A., and Dullo, W. C.: Stable Sr-isotope,
Sr
Raddatz, J., Rüggeberg, A., Flögel, S., Hathorne, E. C., Liebetrau, V., Eisenhauer, A., and Dullo, W.-Chr.: The influence of seawater pH on U
Raddatz, J., Nürnberg, D., Tiedemann, R., and Rippert, N.: Southeastern
marginal West Pacific Warm Pool sea-surface and thermocline dynamics during
the Pleistocene (2.5–0.5 Ma), Palaeogeogr. Palaeocl., 471, 144–156, https://doi.org/10.1016/j.palaeo.2017.01.024,
2017.
Raitzsch, M., Dueñas-Bohórquez, A., Reichart, G.-J., de Nooijer, L. J., and Bickert, T.: Incorporation of Mg and Sr in calcite of cultured benthic foraminifera: impact of calcium concentration and associated calcite saturation state, Biogeosciences, 7, 869–881, https://doi.org/10.5194/bg-7-869-2010, 2010.
Raja, R., Saraswati, P. K., Rogers, K., and Iwao, K.: Magnesium and
strontium compositions of recent symbiont-bearing benthic foraminifera,
Mar. Micropaleontol., 58, 31–44,
https://doi.org/10.1016/j.marmicro.2005.08.001, 2005.
Rathburn, A. E. and de Deckker, P.: Magnesium and strontium compositions of
Recent benthic foraminifera from the Coral Sea, Australia and Prydz Bay,
Antarctica, Mar. Micropaleontol., 32, 231–248,
https://doi.org/10.1016/S0377-8398(97)00028-5, 1997.
Schleinkofer, N., Raddatz, J., Freiwald, A., Evans, D., Beuck, L., Rüggeberg, A., and Liebetrau, V.: Environmental and biological controls on Na
Schleinkofer, N., Raddatz, J., Evans, D., Gerdes, A., Flögel, S., Voigt,
S., Büscher, J. V., and Wisshak, M.: Compositional variability of Mg
Schöne, B. R., Zhang, Z., Jacob, D., Gillikin, D. P., Tütken, T.,
Garbe-Schönberg, D., McConnaughey, T., and Soldati, A.: Effect of
organic matrices on the determination of the trace element chemistry (Mg,
Sr, Mg
Schweizer, M., Bowser, S. S., Korsun, S., and Pawlowski, J.: Emendation of
Cibicides antarcticus (Saidova, 1975) based on molecular, morphological, and
ecological data, J. Foramin. Res., 42, 340–344, https://doi.org/10.2113/gsjfr.42.4.340, 2012.
Secor, C. L., Mills, E. L., Harshbarger, J., Kuntz, H. T., Gutenmann, W. H.,
and Lisk, D. J.: Bioaccumulation of toxicants, element and nutrient
composition, and soft tissue histology of zebra mussels (Dreissena
polymorpha) from New York State waters, Chemosphere, 26, 1559–1575,
https://doi.org/10.1016/0045-6535(93)90224-S, 1993.
Segev, E. and Erez, J.: Effect of Mg
Smith, P. B. and Emiliani, C.: Oxygen-isotope analysis of recent tropical
pacific benthonic foraminifera, Science, 160, 1335–1336,
https://doi.org/10.1126/science.160.3834.1335, 1968.
Spero, H. J.: Ultrastructural examination of chamber morphogenesis and
biomineralization in the planktonic foraminifer Orbulina universa, Mar.
Biol., 99, 9–20, https://doi.org/10.1007/BF00644972, 1988.
Spötl, C. and Vennemann, T. W.: Continuous-flow isotope ratio mass
spectrometric analysis of carbonate minerals, Rapid Commun. Mass
Sp., 17, 1004–1006, https://doi.org/10.1002/rcm.1010, 2003.
Stephenson, A. E., Deyoreo, J. J., Wu, L., Wu, K. J., Hoyer, J., and Dove,
P. M.: Peptides enhance magnesium signature in calcite: Insights into
origins of vital effects, Science, 322, 724–727,
https://doi.org/10.1126/science.1159417, 2008.
Sunda, W. G. and Huntsman, S. A.: Regulation of cellular manganese and
manganese transport rates in the unicellular alga Chlamydomonas,
Limnol. Oceanogr., 30, 71–80, https://doi.org/10.4319/lo.1985.30.1.0071,
1985.
Swinehart, J. H. and Smith, K. W.: Iron And Manganese Deposition In The
Periostraca Of Several Bivalve Molluscs, Biol. Bull., 156,
369–381, https://doi.org/10.2307/1540924, 1979.
Takesue, R. K., Bacon, C. R., and Thompson, J. K.: Influences of organic
matter and calcification rate on trace elements in aragonitic estuarine
bivalve shells, Geochim. Cosmochim. Ac., 72, 5431–5445,
https://doi.org/10.1016/j.gca.2008.09.003, 2008.
Tambutté, E., Allemand, D., Zoccola, D., Meibom, A., Lotto, S.,
Caminiti, N., and Tambutté, S.: Observations of the tissue-skeleton
interface in the scleractinian coral Stylophora pistillata, Coral Reefs, 26,
517–529, https://doi.org/10.1007/s00338-007-0263-5, 2007.
Todd, R.: A new Rosalina (foraminifera) parasitic on a bivalve, Deep-Sea
Research and Oceanographic Abstracts, 12, 831–837,
https://doi.org/10.1016/0011-7471(65)90806-5, 1965.
Toyofuku, T., Kitazato, H., Kawahata, H., Tsuchiya, M., and Nohara, M.:
Evaluation of Mg
Toyofuku, T., Matsuo, M. Y., de Nooijer, L. J., Nagai, Y., Kawada, S.,
Fujita, K., Reichart, G. J., Nomaki, H., Tsuchiya, M., Sakaguchi, H., and
Kitazato, H.: Proton pumping accompanies calcification in foraminifera,
Nat. Commun., 8, 1–6, https://doi.org/10.1038/ncomms14145, 2017.
Tribovillard, N., Algeo, T. J., Lyons, T., and Riboulleau, A.: Trace metals
as paleoredox and paleoproductivity proxies: An update, Chem. Geol.,
232, 12–32, https://doi.org/10.1016/j.chemgeo.2006.02.012, 2006.
van Dijk, I., Mouret, A., Cotte, M., le Houedec, S., Oron, S., Reichart, G.
J., Reyes-Herrera, J., Filipsson, H. L., and Barras, C.: Chemical
Heterogeneity of Mg, Mn, Na, S, and Sr in Benthic Foraminiferal Calcite,
Front. Earth Sci., 7, 281,
https://doi.org/10.3389/feart.2019.00281, 2019.
van Dijk, I., de Nooijer, L. J., Barras, C., and Reichart, G. J.: Mn
Incorporation in Large Benthic Foraminifera: Differences Between Species and
the Impact of pCO2, Front. Earth Sci., 8,
https://doi.org/10.3389/feart.2020.567701, 2020.
Vénec-Peyré, M. T.: Bioeroding foraminifera: A review, Mar. Micropaleontol., 28, 19–30, https://doi.org/10.1016/0377-8398(95)00037-2,
1996.
Wada, K. and Fujinuki, T.: Biomineralization in bivalve molluscs with
emphasis on the chemical composition of the extrapallial fluid, in: Mechanisms of Mineralization in the Invertebrates and Plants, edited by: Watabe, N. and Wilbur, K. M., University of South Carolina Press, Columbia, SC, USA, 175–190, 1976.
Walker, S. E., Hancock, L. G., and Bowser, S. S.: Diversity, biogeography,
body size and fossil record of parasitic and suspected parasitic
foraminifera: A review, J. Foramin. Res., 47, 34–55,
https://doi.org/10.2113/gsjfr.47.1.34, 2017.
Webb, A. E., Pomponi, S. A., van Duyl, F. C., Reichart, G. J., and de
Nooijer, L. J.: pH Regulation and Tissue Coordination Pathways Promote
Calcium Carbonate Bioerosion by Excavating Sponges, Sci. Rep., 9,
1–10, https://doi.org/10.1038/s41598-018-36702-8, 2019.
Wheeler, A. P.: Mechanisms of Molluscan Shell Formation, in: Calcification in Biological Systems, CRC Press, 179–216, https://doi.org/10.1201/9781003068396-10, 2020.
Whitney, N. M., Johnson, B. J., Dostie, P. T., Luzier, K., and Wanamaker, A.
D.: Paired bulk organic and individual amino acid δ15N analyses of
bivalve shell periostracum: A paleoceanographic proxy for water source
variability and nitrogen cycling processes, Geochim. Cosmochim. Ac.,
254, 67–85, https://doi.org/10.1016/j.gca.2019.03.019, 2019.
Wilbur, K. M. and Saleuddin, A. S. M.: Shell Formation, in: The Mollusca,
Elsevier, 235–287, https://doi.org/10.1016/B978-0-12-751404-8.50014-1,
1983.
Yin, Y., Huang, J., Paine, M. L., Reinhold, V. N., and Chasteen, N. D.:
Structural Characterization of the Major Extrapallial Fluid Protein of the
Mollusc Mytilus edulis: Implications for Function, Biochemistry, 44,
10720–10731, https://doi.org/10.1021/bi0505565, 2005.
Yu, X. and Inesi, G.: Variable stoichiometric efficiency of Ca2+ and
Sr2+ transport by the sarcoplasmic reticulum ATPase, J. Biol.
Chem., 270, 4361–4367, https://doi.org/10.1074/jbc.270.9.4361, 1995.
Zhang, C. and Zhang, R.: Matrix proteins in the outer shells of molluscs,
Mar. Biotechnol., 8, 572–586,
https://doi.org/10.1007/s10126-005-6029-6, 2006.
Short summary
We have measured the chemical composition of the carbonate shells of the parasitic foraminifera Hyrrokkin sarcophaga in order to test if it is influenced by the host organism (bivalve or coral). We find that both the chemical and isotopic composition is influenced by the host organism. For example strontium is enriched in foraminifera that grew on corals, whose skeleton is built from aragonite, which is naturally enriched in strontium compared to the bivalves' calcite shell.
We have measured the chemical composition of the carbonate shells of the parasitic foraminifera...
Altmetrics
Final-revised paper
Preprint