Articles | Volume 19, issue 10
https://doi.org/10.5194/bg-19-2671-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-2671-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
30 May 2022
Research article |
| 30 May 2022
| 30 May 2022
Intra-skeletal variability in phosphate oxygen isotope composition reveals regional heterothermies in marine vertebrates
Centre de Recherche en Paléontologie – Paris (CR2P), CNRS,
Muséum national d'Histoire naturelle, Sorbonne Université, 57 rue
Cuvier, 75231 Paris CEDEX 05, France
Romain Amiot
Univ Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne,
France
Guillaume Suan
Univ Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne,
France
Christophe Lécuyer
Univ Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne,
France
Institut Universitaire de France, Paris, France
François Fourel
Laboratoire d'Ecologie des Hydrosystèmes Naturels et
Anthropisés, CNRS UMR 5023, Université Claude Bernard Lyon 1,
Villeurbanne, France
Fabien Demaret
Observatoire PELAGIS, UMS 3462 CNRS/Université de La Rochelle,
Pôle Analytique, 5 allée de l'Océan, 17000 La Rochelle, France
Arnauld Vinçon-Laugier
Univ Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne,
France
Sylvain Charbonnier
Centre de Recherche en Paléontologie – Paris (CR2P), CNRS,
Muséum national d'Histoire naturelle, Sorbonne Université, 57 rue
Cuvier, 75231 Paris CEDEX 05, France
Peggy Vincent
Centre de Recherche en Paléontologie – Paris (CR2P), CNRS,
Muséum national d'Histoire naturelle, Sorbonne Université, 57 rue
Cuvier, 75231 Paris CEDEX 05, France
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Stephen P. Hesselbo, Aisha Al-Suwaidi, Sarah J. Baker, Giorgia Ballabio, Claire M. Belcher, Andrew Bond, Ian Boomer, Remco Bos, Christian J. Bjerrum, Kara Bogus, Richard Boyle, James V. Browning, Alan R. Butcher, Daniel J. Condon, Philip Copestake, Stuart Daines, Christopher Dalby, Magret Damaschke, Susana E. Damborenea, Jean-Francois Deconinck, Alexander J. Dickson, Isabel M. Fendley, Calum P. Fox, Angela Fraguas, Joost Frieling, Thomas A. Gibson, Tianchen He, Kat Hickey, Linda A. Hinnov, Teuntje P. Hollaar, Chunju Huang, Alexander J. L. Hudson, Hugh C. Jenkyns, Erdem Idiz, Mengjie Jiang, Wout Krijgsman, Christoph Korte, Melanie J. Leng, Timothy M. Lenton, Katharina Leu, Crispin T. S. Little, Conall MacNiocaill, Miguel O. Manceñido, Tamsin A. Mather, Emanuela Mattioli, Kenneth G. Miller, Robert J. Newton, Kevin N. Page, József Pálfy, Gregory Pieńkowski, Richard J. Porter, Simon W. Poulton, Alberto C. Riccardi, James B. Riding, Ailsa Roper, Micha Ruhl, Ricardo L. Silva, Marisa S. Storm, Guillaume Suan, Dominika Szűcs, Nicolas Thibault, Alfred Uchman, James N. Stanley, Clemens V. Ullmann, Bas van de Schootbrugge, Madeleine L. Vickers, Sonja Wadas, Jessica H. Whiteside, Paul B. Wignall, Thomas Wonik, Weimu Xu, Christian Zeeden, and Ke Zhao
Sci. Dril., 32, 1–25, https://doi.org/10.5194/sd-32-1-2023, https://doi.org/10.5194/sd-32-1-2023, 2023
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We present initial results from a 650 m long core of Late Triasssic to Early Jurassic (190–202 Myr) sedimentary strata from the Cheshire Basin, UK, which is shown to be an exceptional record of Earth evolution for the time of break-up of the supercontinent Pangaea. Further work will determine periodic changes in depositional environments caused by solar system dynamics and used to reconstruct orbital history.
Thomas Letulle, Danièle Gaspard, Mathieu Daëron, Florent Arnaud-Godet, Arnauld Vinçon-Laugier, Guillaume Suan, and Christophe Lécuyer
Biogeosciences, 20, 1381–1403, https://doi.org/10.5194/bg-20-1381-2023, https://doi.org/10.5194/bg-20-1381-2023, 2023
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This paper studies the chemistry of modern marine shells called brachiopods. We investigate the relationship of the chemistry of these shells with sea temperatures to test and develop tools for estimating sea temperatures in the distant past. Our results confirm that two of the investigated chemical markers could be useful thermometers despite some second-order variability independent of temperature. The other chemical markers investigated, however, should not be used as a thermometer.
Nagham Tabaja, David Amouroux, Lamis Chalak, François Fourel, Emmanuel Tessier, Ihab Jomaa, Milad El Riachy, and Ilham Bentaleb
Biogeosciences, 20, 619–633, https://doi.org/10.5194/bg-20-619-2023, https://doi.org/10.5194/bg-20-619-2023, 2023
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This study investigates the seasonality of the mercury (Hg) concentration of olive trees. Hg concentrations of foliage, stems, soil surface, and litter were analyzed on a monthly basis in ancient olive trees growing in two groves in Lebanon. Our study draws an adequate baseline for the eastern Mediterranean and for the region with similar climatic inventories on Hg vegetation uptake in addition to being a baseline for new studies on olive trees in the Mediterranean.
Christoph Lécuyer, François Atrops, François Fourel, Jean-Pierre Flandrois, Gilles Pinay, and Philippe Davy
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2022-132, https://doi.org/10.5194/hess-2022-132, 2022
Manuscript not accepted for further review
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Located in the French Southern Alps, the Cerveyrette valley constitutes a watershed of about 100 km2. Cyclicality in the stable isotope compositions of the river waters recorded over two years allowed us to estimate a time lag of three to four months between precipitations and their sampling at the discharge point of the watershed. We thus show that the transfer time from mountain-accumulated snow toward the low-altitude areas is a sensitive variable responding to the current climate warming.
Thomas Letulle, Guillaume Suan, Mathieu Daëron, Mikhail Rogov, Christophe Lécuyer, Arnauld Vinçon-Laugier, Bruno Reynard, Gilles Montagnac, Oleg Lutikov, and Jan Schlögl
Clim. Past, 18, 435–448, https://doi.org/10.5194/cp-18-435-2022, https://doi.org/10.5194/cp-18-435-2022, 2022
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In this study, we applied geochemical tools to well-preserved ∼180-million-year-old marine mollusc shells from polar and mid-latitude seas. These results indicate that polar shells grew at temperatures of 8–18°C, while mid-latitude shells grew at temperatures of 24–28°C. These results, together with previously published data, raise concerns about the ability of climate models to predict accurate polar temperatures under reasonably high atmospheric CO2 levels.
Related subject area
Biogeochemistry: Stable Isotopes & Other Tracers
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
Position-specific kinetic isotope effects for nitrous oxide: A new expansion of the Rayleigh model
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
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
Host-influenced geochemical signature in the parasitic foraminifera Hyrrokkin sarcophaga
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
Effects of 238U variability and physical transport on water column 234Th downward fluxes in the coastal upwelling system off Peru
Do degree and rate of silicate weathering depend on plant productivity?
Alpine Holocene tree-ring dataset: age-related trends in the stable isotopes of cellulose show species-specific patterns
Ideas and perspectives: The same carbon behaves like different elements – an insight into position-specific isotope distributions
Seasonal dynamics of the COS and CO2 exchange of a managed temperate grassland
Leaf-scale quantification of the effect of photosynthetic gas exchange on Δ17O of atmospheric CO2
The stable carbon isotope signature of methane produced by saprotrophic fungi
Understanding the effects of early degradation on isotopic tracers: implications for sediment source attribution using compound-specific isotope analysis (CSIA)
Oxygen isotope composition of waters recorded in carbonates in strong clumped and oxygen isotopic disequilibrium
Isotopic evidence for alteration of nitrous oxide emissions and producing pathways' contribution under nitrifying conditions
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
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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
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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.
Elise D. Rivett, Wenjuan Ma, Nathaniel E. Ostrom, and Eric L. Hegg
EGUsphere, https://doi.org/10.5194/egusphere-2024-963, https://doi.org/10.5194/egusphere-2024-963, 2024
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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.
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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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.
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
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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
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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
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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
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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
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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.
Nicolai Schleinkofer, David Evans, Max Wisshak, Janina Vanessa Büscher, Jens Fiebig, André Freiwald, Sven Härter, Horst R. Marschall, Silke Voigt, and Jacek Raddatz
Biogeosciences, 18, 4733–4753, https://doi.org/10.5194/bg-18-4733-2021, https://doi.org/10.5194/bg-18-4733-2021, 2021
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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.
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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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.
Ruifang C. Xie, Frédéric A. C. Le Moigne, Insa Rapp, Jan Lüdke, Beat Gasser, Marcus Dengler, Volker Liebetrau, and Eric P. Achterberg
Biogeosciences, 17, 4919–4936, https://doi.org/10.5194/bg-17-4919-2020, https://doi.org/10.5194/bg-17-4919-2020, 2020
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Thorium-234 (234Th) is widely used to study carbon fluxes from the surface ocean to depth. But few studies stress the relevance of oceanic advection and diffusion on the downward 234Th fluxes in nearshore environments. Our study in offshore Peru showed strong temporal variations in both the importance of physical processes on 234Th flux estimates and the oceanic residence time of 234Th, whereas salinity-derived seawater 238U activities accounted for up to 40 % errors in 234Th flux estimates.
Ralf A. Oeser and Friedhelm von Blanckenburg
Biogeosciences, 17, 4883–4917, https://doi.org/10.5194/bg-17-4883-2020, https://doi.org/10.5194/bg-17-4883-2020, 2020
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We present a novel strategy to decipher the relative impact of biogenic and abiotic drivers of weathering. We parameterized the nutrient fluxes in four ecosystems along a climate and vegetation gradient situated on the Chilean Coastal Cordillera. We investigated how nutrient demand by plants drives weathering. We found that the increase in biomass nutrient demand is accommodated by faster nutrient recycling rather than an increase in the weathering–release rates.
Tito Arosio, Malin M. Ziehmer, Kurt Nicolussi, Christian Schlüchter, and Markus Leuenberger
Biogeosciences, 17, 4871–4882, https://doi.org/10.5194/bg-17-4871-2020, https://doi.org/10.5194/bg-17-4871-2020, 2020
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Stable isotopes in tree-ring cellulose are tools for climatic reconstructions, but interpretation is challenging due to nonclimate trends. We analyzed the tree-age trends in tree-ring isotopes of deciduous larch and evergreen cembran pine. Samples covering the whole Holocene were collected at the tree line in the Alps. For cambial ages over 100 years, we prove the absence of age trends in δD, δ18O, and δ13C for both species. For lower cambial ages, trends differ for each isotope and species.
Yuyang He, Xiaobin Cao, and Huiming Bao
Biogeosciences, 17, 4785–4795, https://doi.org/10.5194/bg-17-4785-2020, https://doi.org/10.5194/bg-17-4785-2020, 2020
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Different carbon sites in a large organic molecule have different isotope compositions. Different carbon sites may not have the chance to exchange isotopes at all. The lack of appreciation of this notion might be blamed for an unsettled debate on the thermodynamic state of an organism. Here we demonstrate using minerals, N2O, and acetic acid that the dearth of exchange among different carbon sites renders them as independent as if they were different elements in organic molecules.
Felix M. Spielmann, Albin Hammerle, Florian Kitz, Katharina Gerdel, and Georg Wohlfahrt
Biogeosciences, 17, 4281–4295, https://doi.org/10.5194/bg-17-4281-2020, https://doi.org/10.5194/bg-17-4281-2020, 2020
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Carbonyl sulfide (COS) can be used as a proxy for plant photosynthesis on an ecosystem scale. However, the relationships between COS and CO2 fluxes and their dependence on daily to seasonal changes in environmental drivers are still poorly understood. We examined COS and CO2 ecosystem fluxes above an agriculturally used mountain grassland for 6 months. Harvesting of the grassland disturbed the otherwise stable COS-to-CO2 uptake ratio. We even found the canopy to release COS during those times.
Getachew Agmuas Adnew, Thijs L. Pons, Gerbrand Koren, Wouter Peters, and Thomas Röckmann
Biogeosciences, 17, 3903–3922, https://doi.org/10.5194/bg-17-3903-2020, https://doi.org/10.5194/bg-17-3903-2020, 2020
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We measured the effect of photosynthesis, the largest flux in the carbon cycle, on the triple oxygen isotope composition of atmospheric CO2 at the leaf level during gas exchange using three plant species. The main factors that limit the impact of land vegetation on the triple oxygen isotope composition of atmospheric CO2 are identified, characterized and discussed. The effect of photosynthesis on the isotopic composition of CO2 is commonly quantified as discrimination (ΔA).
Moritz Schroll, Frank Keppler, Markus Greule, Christian Eckhardt, Holger Zorn, and Katharina Lenhart
Biogeosciences, 17, 3891–3901, https://doi.org/10.5194/bg-17-3891-2020, https://doi.org/10.5194/bg-17-3891-2020, 2020
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Fungi have recently been identified to produce the greenhouse gas methane. Here, we investigated the stable carbon isotope values of methane produced by saprotrophic fungi. Our results show that stable isotope values of methane from fungi are dependent on the fungal species and the metabolized substrate. They cover a broad range and overlap with stable carbon isotope values of methane reported for methanogenic archaea, the thermogenic degradation of organic matter, and other eukaryotes.
Pranav Hirave, Guido L. B. Wiesenberg, Axel Birkholz, and Christine Alewell
Biogeosciences, 17, 2169–2180, https://doi.org/10.5194/bg-17-2169-2020, https://doi.org/10.5194/bg-17-2169-2020, 2020
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Sediment input into water bodies is a prominent threat to freshwater ecosystems. We tested the stability of tracers employed in freshwater sediment tracing based on compound-specific isotope analysis during early degradation in soil. While bulk δ13C values showed no stability, δ13C values of plant-derived fatty acids and n-alkanes were stably transferred to the soil without soil particle size dependency after an early degradation in organic horizons, thus indicating their suitability as tracers.
Caroline Thaler, Amandine Katz, Magali Bonifacie, Bénédicte Ménez, and Magali Ader
Biogeosciences, 17, 1731–1744, https://doi.org/10.5194/bg-17-1731-2020, https://doi.org/10.5194/bg-17-1731-2020, 2020
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Paleoenvironment reconstructions, retrieved from δ18O and Δ47 values measured in carbonate, are compromised when crystallization occurs in isotopic disequilibrium. We show that some paleoenvironmental information can still be retrieved from these paired disequilibrium Δ47 and δ18O values. The possibility of retrieving information on paleowaters, sediments' interstitial waters, or organisms' body water at the carbonate precipitation loci will help understand past Earth and life evolution.
Guillaume Humbert, Mathieu Sébilo, Justine Fiat, Longqi Lang, Ahlem Filali, Véronique Vaury, Mathieu Spérandio, and Anniet M. Laverman
Biogeosciences, 17, 979–993, https://doi.org/10.5194/bg-17-979-2020, https://doi.org/10.5194/bg-17-979-2020, 2020
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Mitigating emissions of the greenhouse gas N2O requires understanding of the relative contribution of its producing processes in response to environmental variables. We show, using isotopic analysis, that N2O emissions from a nitrifying system were sensitive to oxygenation, temperature and NH4+ concentrations with nitrite reduction being the main N2O source. Temperature appears to be the main control on N2O production, due to its dissimilar effects on ammonium and nitrite oxidizing activities.
Cited articles
Amiot, R., Göhlich, U. B., Lécuyer, C., De Muizon, C., Cappetta, H.,
Fourel, F., Héran, M.-A., and Martineau, F.: Oxygen isotope compositions
of phosphate from Middle Miocene–Early Pliocene marine vertebrates of Peru,
Palaeogeogr. Palaeocl., 264, 85–92, 2008.
Atkins, A., Dean, M. N., Habegger, M.-L., Motta, P. J., Ofer, L., Repp, F.,
Shipov, A., Weiner, S., Currey, J. D., and Shahar, R.: Remodeling in bone
without osteocytes: billfish challenge bone structure–function paradigms,
P. Natl. Acad. Sci. USA, 111, 16047–16052, 2014.
Barrick, R. E.: Isotope paleobiology of the vertebrates: ecology,
physiology, and diagenesis, Paleontol. Soc. Pap., 4, 101–137, 1998.
Barrick, R. E. and Showers, W. J.: Thermophysiology of Tyrannosaurus rex: evidence from
oxygen isotopes, Science, 265, 222–224, 1994.
Barrick, R. E. and Showers, W. J.: Oxygen isotope variability in juvenile
dinosaurs (Hypacrosaurus): evidence for thermoregulation, Paleobiology, 21, 552–560,
1995.
Barrick, R. E., Fischer, A. G., Kolodny, Y., Luz, B., and Bohaska, D.:
Cetacean bone oxygen isotopes as proxies for Miocene ocean composition and
glaciation, Palaios, 7, 521–531, 1992.
Barrick, R. E., Showers, W. J., and Fischer, A. G.: Comparison of
thermoregulation of four ornithischian dinosaurs and a varanid lizard from
the Cretaceous Two Medicine Formation: evidence from oxygen isotopes,
Palaios, 11, 295–305, 1996.
Barrick, R. E., Stoskopf, M. K., Marcot, J. D., Russell, D. A., and Showers,
W. J.: The thermoregulatory functions of the Triceratops frill and horns: heat flow
measured with oxygen isotopes, J. Vertebr. Paleontol., 18, 746–750, 1998.
Bernal, D., Dickson, K. A., Shadwick, R. E., and Graham, J. B.: Analysis of
the evolutionary convergence for high performance swimming in lamnid sharks
and tunas, Comp. Biochem. Physiol. A, 129, 695–726,
2001.
Blank, J. M., Morrissette, J. M., Farwell, C. J., Price, M., Schallert, R.
J., and Block, B. A.: Temperature effects on metabolic rate of juvenile
Pacific bluefin tuna Thunnus orientalis, J. Exp. Biol., 210, 4254–4261, 2007.
Bligh, J. and Johnson, K. G.: Glossary of terms for thermal physiology, J.
Appl. Physiol., 35, 941–961, 1973.
Block, B. A.: Structure of the brain and eye heater tissue in marlins,
sailfish, and spearfishes, J. Morphol., 190, 169–189, 1986.
Block, B. A.: Billfish brain and eye heater: a new look at nonshivering heat
production, Physiology, 2, 208–213, 1987.
Block, B. A.: Evolutionary novelties: how fish have built a heater out of
muscle, Am. Zool., 31, 726–742, 1991.
Block, B. A. and Finnerty, J. R.: Endothermy in fishes: a phylogenetic
analysis of constraints, predispositions, and selection pressures, Environ.
Biol. Fishes, 40, 283–302, 1994.
Bouwknecht, J. A., Olivier, B., and Paylor, R. E.: The stress-induced
hyperthermia paradigm as a physiological animal model for anxiety: a review
of pharmacological and genetic studies in the mouse, Neurosci. Biobehav.
Rev., 31, 41–59, 2007.
Browning, N. E., Dold, C., I-Fan, J., and Worthy, G. A.: Isotope turnover
rates and diet–tissue discrimination in skin of ex situ bottlenose dolphins
(Tursiops truncatus), J. Exp. Biol., 217, 214–221, 2014.
Cannon, B. and Nedergaard, J. A. N.: Brown adipose tissue: function and
physiological significance, Physiol. Rev., 84, 277–359, 2004.
Carey, F. G.: A brain heater in the swordfish, Science, 216, 1327–1329,
1982.
Carey, F. G.: Further observations on the biology of the swordfish, Plan.
Future Billfishes Natl. Coalit. Mar. Conserv. Inc Savannah Ga., edited by: Stroud, R. H., 103–122,
1990.
Carey, F. G. and Lawson, K. D.: Temperature regulation in free-swimming
bluefin tuna, Comp. Biochem. Physiol. A Physiol., 44, 375–392, 1973.
Carey, F. G. and Teal, J. M.: Heat conservation in tuna fish muscle, P.
Natl. Acad. Sci. USA, 56, 1464, https://doi.org/10.1073/pnas.56.5.1464, 1966.
Carey, F. G., Teal, J. M., Kanwisher, J. W., Lawson, K. D., and Beckett, J.
S.: Warm-bodied fish, Am. Zool., 11, 137–143, 1971.
Carey, F. G., Kanwisher, J. W., and Stevens, E. D.: Bluefin tuna warm their
viscera during digestion, J. Exp. Biol., 109, 1–20, 1984.
Carey, F. G., Scharold, J. V., and Kalmijn, A. J.: Movements of blue sharks
(Prionace glauca) in depth and course, Mar. Biol., 106, 329–342, 1990.
Chenery, C., Müldner, G., Evans, J., Eckardt, H., and Lewis, M.:
Strontium and stable isotope evidence for diet and mobility in Roman
Gloucester, UK, J. Archaeol. Sci., 37, 150–163, 2010.
Ciner, B., Wang, Y., and Parker, W.: Oxygen isotopic variations in modern
cetacean teeth and bones: implications for ecological, paleoecological, and
paleoclimatic studies, Sci. Bull., 61, 92–104, 2016.
Clauzel, T., Richardin, P., Ricard, J., Le Béchennec, Y., Amiot, R.,
Fourel, F., Phouybanhdyt, B., Vinçon-Laugier, A., Flandrois, J.-P., and
Lécuyer, C.: The Gauls experienced the Roman Warm Period: Oxygen isotope
study of the Gallic site of Thézy-Glimont, Picardie, France, J.
Archaeol. Sci. Rep., 34, 102595, https://doi.org/10.1016/j.jasrep.2020.102595, 2020.
Coulson, A. B., Kohn, M. J., Shirley, M., Joyce, W. G., and Barrick, R. E.:
Phosphate–oxygen isotopes from marine turtle bones: Ecologic and
paleoclimatic applications, Palaeogeogr. Palaeocl., 264,
78–84, 2008.
Crowson, R. A., Showers, W. J., Wright, E. K., and Hoering, T. C.:
Preparation of phosphate samples for oxygen isotope analysis, Anal. Chem.,
63, 2397–2400, 1991.
Dickson, K. A. and Graham, J. B.: Evolution and consequences of endothermy
in fishes, Physiol. Biochem. Zool., 77, 998–1018, 2004.
Eichhorn, G., Groscolas, R., Le Glaunec, G., Parisel, C., Arnold, L.,
Medina, P., and Handrich, Y.: Heterothermy in growing king penguins, Nat.
Commun., 2, 1–7, 2011.
Fourel, F., Martineau, F., Lécuyer, C., Kupka, H.-J., Lange, L., Ojeimi,
C., and Seed, M.: 18O
Fritsches, K. A., Brill, R. W., and Warrant, E. J.: Warm eyes provide
superior vision in swordfishes, Curr. Biol., 15, 55–58, 2005.
Graham, J. B. and Dickson, K. A.: Anatomical and physiological
specializations for endothermy, Fish Physiol., 19, 121–165, 2001.
Graham, J. B. and Dickson, K. A.: Tuna comparative physiology, J. Exp.
Biol., 207, 4015–4024, 2004.
Guppy, M., Hulbert, W. C., and Hochachka, P. W.: Metabolic sources of heat
and power in tuna muscles: II. Enzyme and metabolite profiles, J. Exp.
Biol., 82, 303–320, 1979.
Halas, S. and Szaran, J.: Improved thermal decomposition of sulfates to
SO2 and mass spectrometric determination of δ34S of IAEA
SO-5, IAEA SO-6 and NBS-127 sulfate standards, Rapid Commun. Mass Spectrom.,
15, 1618–1620, 2001.
Halas, S., Skrzypek, G., Meier-Augenstein, W., Pelc, A., and Kemp, H. F.:
Inter-laboratory calibration of new silver orthophosphate comparison
materials for the stable oxygen isotope analysis of phosphates, Rapid
Commun. Mass Spectrom., 25, 579–584, 2011.
Hampton, I. F. G., Whittow, G. C., Szekerczes, J., and Rutherford, S.: Heat
transfer and body temperature in the Atlantic bottlenose dolphin, Tursiops truncatus, Int. J.
Biometeorol., 15, 247–253, 1971.
Hashimoto, O., Ohtsuki, H., Kakizaki, T., Amou, K., Sato, R., Doi, S.,
Kobayashi, S., Matsuda, A., Sugiyama, M., and Funaba, M.: Brown adipose
tissue in cetacean blubber, PLoS ONE, 10, e0116734, https://doi.org/10.1371/journal.pone.0116734, 2015.
Hui, C. A.: Seawater consumption and water flux in the common dolphin
Delphinus delphis, Physiol. Zool., 54, 430–440, 1981.
Hut, G.: Consultants' Group Meeting on Stable Isotope Reference Samples for
Geochemical and Hydrological Investigations, IAEA Vienna 16–18 Sept. 1985
Rep. Dir. Gen. Int. At. Energy Agency Int. At. Energy Agency Vienna, 42,
1987.
Irving, L. and Hart, J. S.: The metabolism and insulation of seals as
bare-skinned mammals in cold water, Can. J. Zool., 35, 497–511, 1957.
Irving, L. and Krog, J.: Temperature of skin in the Arctic as a regulator of
heat, J. Appl. Physiol., 7, 355–364, 1955.
Kastelein, R. A., Macdonald, G. J., and Wiepkema, P. R.: A note on food
consumption and growth of common dolphins (Delphinus delphis), J. Cetacean Res. Manag., 2,
69–74, 2000.
Kolodny, Y., Luz, B., and Navon, O.: Oxygen isotope variations in phosphate
of biogenic apatites, I. Fish bone apatite – rechecking the rules of the
game, Earth Planet. Sc. Lett., 64, 398–404, 1983.
Lécuyer, C., Grandjean, P., O'Neil, J. R., Cappetta, H., and Martineau,
F.: Thermal excursions in the ocean at the Cretaceous – Tertiary boundary
(northern Morocco): δ18O record of phosphatic fish debris,
Palaeogeogr. Palaeocl., 105, 235–243, 1993.
Lécuyer, C., Amiot, R., Touzeau, A., and Trotter, J.: Calibration of the
phosphate δ18O thermometer with carbonate–water oxygen isotope
fractionation equations, Chem. Geol., 347, 217–226, 2013.
Legendre, L. J. and Davesne, D.: The evolution of mechanisms involved in
vertebrate endothermy, Philos. Trans. R. Soc. B, 375, 20190136, https://doi.org/10.1098/rstb.2019.0136, 2020.
LeGrande, A. N. and Schmidt, G. A.: Global gridded data set of the oxygen
isotopic composition in seawater, Geophys. Res. Lett., 33, L12604, https://doi.org/10.1029/2006GL026011, 2006.
Linnæus, C.: Systema naturæ per regna tria naturæ, secundum
classes, ordines, genera, species, cum characteribus, differentiis,
synonymis, locis, Tomus Ed. Decima Reformata 1–41–824 HolmiæSalvius,
1758.
Lockyer, C.: Body fat condition in Northeast Atlantic fin whales,
Balaenoptera physalus, and its relationship with reproduction and food resource, Can. J. Fish.
Aquat. Sci., 43, 142–147, 1986.
Longinelli, A.: Oxygen isotopes in mammal bone phosphate: a new tool for
paleohydrological and paleoclimatological research?, Geochim. Cosmochim.
Ac., 48, 385–390, 1984.
Longinelli, A. and Nuti, S.: Revised phosphate-water isotopic temperature
scale, Earth Planet. Sc. Lett., 19, 373–376, 1973.
Luz, B., Kolodny, Y., and Horowitz, M.: Fractionation of oxygen isotopes
between mammalian bone-phosphate and environmental drinking water, Geochim.
Cosmochim. Ac., 48, 1689–1693, 1984.
McMaster, M. K. and Downs, C. T.: Thermal variability in body temperature in
an ectotherm: Are cloacal temperatures good indicators of tortoise body
temperature?, J. Therm. Biol., 38, 163–168, 2013.
Meunier, F. J. and Huysseune, A.: The concept of bone tissue in
Osteichthyes, Neth. J. Zool., 42, 445–458, https://doi.org/10.1163/156854291X00441, 1992.
Missell, C. A.: Thermoregulatory adaptations of Acrocanthosaurus atokensis – evidence from oxygen
isotopes, North Carolina State University, 82 pp., 2004.
Morrison, P.: Body temperatures in some Australian mammals. III. Cetacea
(Megaptera), Biol. Bull., 123, 154–169, 1962.
Myrick, A. C.: Some new potential uses of dental layers
in studying delphinid populations, in: Dolphin societies, edited by: Pryor, K. and Norris, K. S., University of California Press,
Berkeley, CA, 251–279, 1991.
Ortiz, R. M.: Osmoregulation in marine mammals, J. Exp. Biol., 204,
1831–1844, 2001.
Picard, S., Garcia, J.-P., Lécuyer, C., Sheppard, S. M., Cappetta, H.,
and Emig, C. C.: δ18O values of coexisting brachiopods and
fish: Temperature differences and estimates of paleo–water depths, Geology,
26, 975–978, 1998.
Ponganis, P. J., Van Dam, R. P., Levenson, D. H., Knower, T., Ponganis, K.
V., and Marshall, G.: Regional heterothermy and conservation of core
temperature in emperor penguins diving under sea ice, Comp. Biochem.
Physiol. A. Mol. Integr. Physiol., 135, 477–487, 2003.
Ponganis, P. J., Kreutzer, U., Stockard, T. K., Lin, P.-C., Sailasuta, N.,
Tran, T.-K., Hurd, R., and Jue, T.: Blood flow and metabolic regulation in
seal muscle during apnea, J. Exp. Biol., 211, 3323–3332, 2008.
Pucéat, E., Lécuyer, C., Sheppard, S. M., Dromart, G., Reboulet, S.,
and Grandjean, P.: Thermal evolution of Cretaceous Tethyan marine waters
inferred from oxygen isotope composition of fish tooth enamels,
Paleoceanography, 18, 1–12, 2003.
R Core Team: R: A language and environment for statistical computing,
Vienna, Austria, R Foundation for Statistical Computing, 2017.
Riccialdelli, L., Newsome, S. D., Fogel, M. L., and Goodall, R. N. P.:
Isotopic assessment of prey and habitat preferences of a cetacean community
in the southwestern South Atlantic Ocean, Mar. Ecol. Prog. Ser., 418,
235–248, 2010.
Robineau, D., Goodall, R. N. P., Pichler, F., and Baker, C. S.: Description
of a new subspecies of Commerson's dolphin, Cephalorhynchus commersonii (Lacépède, 1804),
inhabiting the coastal waters of the Kerguelen Islands, Mammalia, 71, 172–180,
https://doi.org/10.1515/MAMM.2007.034, 2007.
Rommel, S. A., Pabst, D. A., McLellan, W. A., Mead, J. G., and Potter, C.
W.: Anatomical evidence for a countercurrent heat exchanger associated with
dolphin testes, Anat. Rec., 232, 150–156, 1992.
Rosen, D. A. and Worthy, G. A.: Nutrition and energetics, in: CRC handbook
of marine mammal medicine, CRC Press, 695–738, 3rd Edn., ISBN 978-1-31514-4-931, 2018.
Rosenthal, H. L.: Uptake, turnover and transport of bone seeking elements in
fishes, Ann. N. Y. Acad. Sci. US, 109, 278–293, https://doi.org/10.1111/j.1749-6632.1963.tb13472.x, 1963.
Scholander, P. F. and Schevill, W. E.: Counter-current vascular heat
exchange in the fins of whales, J. Appl. Physiol., 8, 279–282, 1955.
Schwab, I. R.: These eyes are hot…, Br. J. Ophthalmol., 86, 266–266,
2002.
Stoehr, A., St. Martin, J., Aalbers, S., Sepulveda, C., and Bernal, D.:
Free-swimming swordfish, Xiphias gladius, alter the rate of whole body heat transfer:
morphological and physiological specializations for thermoregulation, ICES
J. Mar. Sci., 75, 858–870, 2018.
Stoskopf, M. K., Barrick, R. E., and Showers, W. J.: Oxygen isotope
variability in bones of wild caught and constant temperature reared
sub-adult American alligators, J. Therm. Biol., 26, 183–191, 2001.
Tattersall, G. J., Andrade, D. V., and Abe, A. S.: Heat exchange from the
toucan bill reveals a controllable vascular thermal radiator, Science, 325,
468–470, 2009.
Telfer, N., Cornell, L. H., and Prescott, J. H.: Do dolphins drink water?,
J. Am. Vet. Med. Assoc., 157, 555–558, 1970.
Tomilin, A. G.: Notes on Siberian white-sided dolphin, Rybn. Khozaistvo, 26,
50–53, 1950.
Tucker, A. S. and Fraser, G. J.: Evolution and developmental diversity of
tooth regeneration, Seminars in Cell & Developmental Biology, 25–26, 71–80, https://doi.org/10.1016/j.semcdb.2013.12.013,
2014.
Ungar, P. S.: Mammal teeth: origin, evolution, and diversity, John Hopkins
University Press, https://doi.org/10.1353/book.485, 2010.
Vennemann, T. W., Hegner, E., Cliff, G., and Benz, G. W.: Isotopic
composition of recent shark teeth as a proxy for environmental conditions,
Geochim. Cosmochim. Ac., 65, 1583–1599, 2001.
Watanabe, Y. Y., Goldman, K. J., Caselle, J. E., Chapman, D. D., and
Papastamatiou, Y. P.: Comparative analyses of animal-tracking data reveal
ecological significance of endothermy in fishes, P. Natl. Acad. Sci. USA,
112, 6104–6109, 2015.
Williams, T. M., Haun, J., Davis, R. W., Fuiman, L. A., and Kohin, S.: A
killer appetite: metabolic consequences of carnivory in marine mammals,
Comp. Biochem. Physiol. A. Mol. Integr. Physiol., 129, 785–796, 2001.
Witten, P. E. and Huysseune, A.: A comparative view on mechanisms and
functions of skeletal remodelling in teleost fish, with special emphasis on
osteoclasts and their function, Biol. Rev., 84, 315–346, 2009.
Wright, L. E. and Schwarcz, H. P.: Stable carbon and oxygen isotopes in
human tooth enamel: identifying breastfeeding and weaning in prehistory, Am.
J. Phys. Anthropol. Off. Publ. Am. Assoc. Phys. Anthropol., 106, 1–18,
1998.
Yeates, L. C. and Houser, D. S.: Thermal tolerance in bottlenose dolphins
(Tursiops truncatus), J. Exp. Biol., 211, 3249–3257, 2008.
Yoshida, N. and Miyazaki, N.: Oxygen isotope correlation of cetacean bone
phosphate with environmental water, J. Geophys. Res. Oceans, 96, 815–820,
1991.
Young, D. D. and Cockcroft, V. G.: Diet of common dolphins (Delphinus delphis) off the
south-east coast of southern Africa: opportunism or specialization?, J.
Zool., 234, 41–53, 1994.
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.
We analysed the oxygen isotope composition of bones and teeth of four marine species possessing...
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