Stable Isotope Ecology (CER, Kyoto Univ.)

An improved ion-exchange-to-silver-salt procedure for δ18O measurement of nitrate in natural samples The oxygen isotope composition (δ18O) of natural nitrate is a proven effective indicator of its sources and the (bio)geochemical processes that it has…

An improved ion-exchange-to-silver-salt procedure for δ18O measurement of nitrate in natural samples#stableisotopes www.sciencedirect.com/science/arti...

Frontiers | Light outweighs ammonium: irradiance governs early morphological, physiological and isotopic responses of Zostera marina under controlled nutrient additions Under accelerating coastal eutrophication, disentangling the relative roles of light limitation and nitrogen enrichment is essential for diagnosing seagrass ...

Light outweighs ammonium: irradiance governs early morphological, physiological and isotopic responses of Zostera marina under controlled nutrient additions #stableisotopes www.frontiersin.org/journals/mar...

Quantitative DNA Stable Isotope Probing Identifies Active Microorganisms Assimilating Volatile Fatty Acids in Full-Scale Enhanced Biological Phosphorus Removal Processes Enhanced biological phosphorus removal (EBPR) systems often rely on exogenous carbon sources, such as volatile fatty acids (VFAs), to achieve higher P removal. Here, we employed DNA quantitative stable isotope probing (qSIP) using two VFAs, acetate and propionate, in cyclic anaerobic/aerobic incubations to assess their effects on P cycling and microbial activity with biomass from two full-scale EBPR water resource-recovery facilities that utilize VFA addition. We found that anaerobic VFA uptake preferences differed within known groups of PAOs, such as Candidatus Accumulibacter and Tetrasphaera-affiliated members (e.g., Ca. Phosphoribacter), between the two biomasses. The combination of qSIP with metagenomics identified isotopically labeled phages that were linked to active PAOs, highlighting their potential roles in modulating EBPR community composition and activity. The highest levels of anaerobic labeling from acetate were in genomes belonging to Saccharimonadales and Rickettsiales, which are generally host-associated with bacteria and eukaryotes, respectively. This finding highlights the possibility of cross-feeding between PAO hosts and their parasites or predators, as well as the role of so-far uncharacterized organisms participating in carbon cycling under EBPR conditions. Collectively, these results expand our understanding of the ecological interactions involved in communities anaerobically uptaking VFAs and cycling P that are central to EBPR.

Quantitative DNA Stable Isotope Probing Identifies Active Microorganisms Assimilating Volatile Fatty Acids in Full-Scale Enhanced Biological Phosphorus Removal Processes | Environmental Science & Technology pubs.acs.org/doi/10.1021/... #stableisotopes

Qiu, Y., Zhao, Y., Wang, B. et al. Root traits and mycorrhizal fungi mediate reactive N and warming impacts on soil organic carbon. #stableisotopes Nat Commun (2026). doi.org/10.1038/s414...

Typhoon‐Induced Nitrous Oxide Consumption in Coastal Open Waters and Its Climate Implications The typhoon alters the N2O production mechanisms from nitrification to denitrification in the open ocean The typhoon induces a substantial N2O consumption in the open ocean N2O exhibits contrast...

Typhoon‐Induced Nitrous Oxide Consumption in Coastal Open Waters and Its Climate Implications - Cai - 2025 - Journal of Geophysical Research: Oceans #stableisotopes agupubs.onlinelibrary.wiley.com/doi/abs/10.1...

Lipid Biomarkers Show Excellent Indicator Potential in Storm Deposit Layers Formed Under the Influence of Typhoons: A Case Study in the Northern Beibu Gulf, China Typhoon Yagi left a storm deposit that is distinctly fingerprinted against background sedimentation by grain-size, Total Organic Carbon (TOC), and lipid biomarkers The source-specific lipid bioma...

Lipid Biomarkers Show Excellent Indicator Potential in Storm Deposit Layers Formed Under the Influence of Typhoons: A Case Study in the Northern Beibu Gulf, China - Lin - 2025 - Journal of Geophysical Research: Oceans #stableisotopes agupubs.onlinelibrary.wiley.com/doi/abs/10.1...

Enhanced methane cycling across the Laptev Sea signaled by time-integrated biomarkers of aerobic methane oxidation Abstract. Elevated methane concentrations in seawater have been reported over extensive areas of the East Siberian Arctic Seas, overlying thawing subsea permafrost. However, observed methane concentra...

Enhanced methane cycling across the Laptev Sea signaled by time-integrated biomarkers of aerobic methane oxidation, Biogeosciences, 23, 1459–1475, doi.org/10.5194/bg-2... #stableisotopes

Diversity, abundance and stable isotope composition of winged Diptera (Insecta) emerging from temperate forest soil Diptera (Insecta) play a significant role in forest ecosystems. With wingless larvae developing in soil and flying imagoes, they represent an importan…

Diversity, abundance and stable isotope composition of winged Diptera (Insecta) emerging from temperate forest soil #stableisotopes www.sciencedirect.com/science/arti...

Yan, X., Shi, G., Li, R. et al. Declining Δ17O of nitrate in the northeastern Tibetan Plateau reveals changing atmospheric oxidative capacity. #stableisotopes Commun Earth Environ (2026). doi.org/10.1038/s432...

Key role of moss in supplementing nitrogen for plant growth under warming in a permafrost ecosystem | PNAS Enhanced plant productivity under climate warming may partially offset soil carbon losses in cold ecosystems, but this compensation depends on whet...

Key role of moss in supplementing nitrogen for plant growth under warming in a permafrost ecosystem | PNAS www.pnas.org/doi/10.1073/... #stableisotopes

Multiple formation pathways for amino acids in the early Solar System based on carbon and nitrogen isotopes in asteroid Bennu samples | PNAS Samples collected from the carbonaceous near-Earth asteroid Bennu and delivered to Earth by NASA’s OSIRIS-REx mission contain organic molecules rel...

Multiple formation pathways for amino acids in the early Solar System based on carbon and nitrogen isotopes in asteroid Bennu samples | PNAS www.pnas.org/doi/10.1073/... #stableisotopes

Bioaccumulation, trophic transfer, and health risk assessment of microplastics in the food web of Wuliangsuhai Lake, China: Higher risk for children Microplastics (MPs) are widely ingested by aquatic organisms. Thus far, our understanding of the biomagnification potential and health risks of MPs in…

Bioaccumulation, trophic transfer, and health risk assessment of microplastics in the food web of Wuliangsuhai Lake, China: Higher risk for children #stableisotopes www.sciencedirect.com/science/arti...

Coupled Temperature Sensitivity of Microbial Carbon and Nitrogen Use Efficiencies in Forest Soils on a Continental Scale In this study, we conducted a continental-scale assessment of variation in microbial carbon and nitrogen use efficiencies (CUE and NUE) across forest soils. We found that microbial CUE and NUE were s...

Coupled Temperature Sensitivity of Microbial Carbon and Nitrogen Use Efficiencies in Forest Soils on a Continental Scale #stableisotopes onlinelibrary.wiley.com/doi/abs/10.1...

Low N Deposition Coupled With Climate Warming Promote Soil Asymbiotic N Fixation via Increasing Microbial Specialists in Alpine Grassland This study presents findings from a decade-long field experiment in the alpine grasslands of the Qinghai-Tibetan Plateau, focusing on the responses of biological nitrogen fixation (BNF) to the combin....

Low N Deposition Coupled With Climate Warming Promote Soil Asymbiotic N Fixation via Increasing Microbial Specialists in Alpine Grassland #stableisotopes onlinelibrary.wiley.com/doi/abs/10.1...

Oxygen Isotopes in Tree Rings Track Neotropical Climate Dynamics Tree-ring δ18O from Abies guatemalensis in Central America captures interannual variations in boreal summer rainfall Lighter δ18O years are associated with a weakening of the Caribbean Low-Level ...

Oxygen Isotopes in Tree Rings Track Neotropical Climate Dynamics - González‐Méndez - 2026 - Geophysical Research Letters #stableisotopes agupubs.onlinelibrary.wiley.com/doi/full/10....

High Ozone Isotope Anomaly at Mt. Everest Linked to Stratospheric Ozone Intrusion Surface ozone isotope observations indicate moderate variations at sites with different pressures The oxygen isotope-17 anomaly is high at Mt. Everest and with a distinct diurnal pattern compared...

High Ozone Isotope Anomaly at Mt. Everest Linked to Stratospheric Ozone Intrusion - Wu - 2026 - Geophysical Research Letters #stableisotopes agupubs.onlinelibrary.wiley.com/doi/full/10....

Anthropogenic Nitrogen Inputs Promote Plant Nitrate Utilization of Polluted Forests Concentrations and natural 15N abundance of soil nitrate, ammonium, organic N, and leaf N were analyzed for forests on a regional scale Nitrate and reduced N contributed 16% and 84% to extractabl...

Anthropogenic Nitrogen Inputs Promote Plant Nitrate Utilization of Polluted Forests - Chen - 2026 - Geophysical Research Letters #stableisotopes agupubs.onlinelibrary.wiley.com/doi/full/10....

Oceanic δ13C Fingerprints Caused by Laurentice Ice Sheet Discharges: Model‐Data Comparison During Heinrich Event 4 Reduced basal friction or increased oceanic melt of the Laurentide ice sheet (LIS) leads to freshwater release and to a reduction in oceanic δ13C Optimal model-data agreement is achieved with red...

Oceanic δ13C Fingerprints Caused by Laurentice Ice Sheet Discharges: Model‐Data Comparison During Heinrich Event 4 - Abot - 2026 - Geophysical Research Letters #stableisotopes agupubs.onlinelibrary.wiley.com/doi/full/10....

Synthesis of Global Soil‐Emitted N2O Isotopic Signatures: Geoclimatic Patterns and Influential Factors Nitrous oxide isotope signatures vary by ecosystem. Croplands show more variable nitrogen values from fertilizer use In croplands, temporal isotope trends are not significant, indicating local fa...

Synthesis of Global Soil‐Emitted N2O Isotopic Signatures: Geoclimatic Patterns and Influential Factors - Li - 2026 - Geophysical Research Letters #stableisotopes agupubs.onlinelibrary.wiley.com/doi/full/10....

Plant diversity increases microbial resistance to drought and soil carbon accumulation We investigated how plant diversity influenced soil microbial processes during moist conditions and an experimental drought. Higher plant diversity increased below-ground plant input. This increased ...

Plant diversity increases microbial resistance to drought and soil carbon accumulation - Winterfeldt - 2026 - Journal of Ecology #stableisotopes besjournals.onlinelibrary.wiley.com/doi/full/10....

Rising atmospheric CO2 reduces nitrogen availability in boreal forests - Nature Nitrogen isotope tree-ring chronologies show that rising atmospheric CO2 has reduced nitrogen availability in boreal forests in Sweden, suggesting that elevated atmospheric CO2 is causing oligotrophic...

Bassett, K.R., Hupperts, S.F., Jämtgård, S. et al. Rising atmospheric CO2 reduces nitrogen availability in boreal forests. #stableisotopes Nature 650, 629–635 (2026). doi.org/10.1038/s415...

Cryogenic vacuum distillation‐induced deuterium isotope biases in leaf water and their ecophysiological implications Recent experiments show that cryogenic vacuum distillation (CVD) – the standard method for plant water extraction – can introduce biases into δ2H measurements of stem water. However, whether similar.....

Cryogenic vacuum distillation‐induced deuterium isotope biases in leaf water and their ecophysiological implications - Wen - 2026 - New Phytologist #stableisotopes nph.onlinelibrary.wiley.com/doi/abs/10.1...

Frontiers | A 28-year record of the isotopic niche of baleen whales in the Gulf of St. Lawrence, Canada: a perspective on ecosystem changes and potential for food competition Fin whales (Balaenoptera physalus), humpback whales (Megaptera novaeangliae) and minke whales (Balaenoptera acutorostrata) seasonally coexist in sympatry in ...

A 28-year record of the isotopic niche of baleen whales in the Gulf of St. Lawrence, Canada: a perspective on ecosystem changes and potential for food competition #stableisotopes www.frontiersin.org/journals/mar...

Spatiotemporal heterogeneity, source apportionment, and transformation-driven partitioned control of nitrate pollution in urban river network: Isotopic and Bayesian insights from the Liuxi-Baini River... Nitrate (NO3–), a critical bioavailable nitrogen (N) species in aquatic systems, poses significant public health and ecological risks. This study inte…

Spatiotemporal heterogeneity, source apportionment, and transformation-driven partitioned control of nitrate pollution in urban river network: Isotopic and Bayesian insights from the Liuxi-Baini River Basin #stableisotopes www.sciencedirect.com/science/arti...

Stable isotopes δD–H2O, δ18O–H2O, δ15N–NO3−, δ18O–NO3− and hydrochemistry of the volcanic catchments and the influence of continental runoff on the environment of Eastern Kamchatka Volcanic catchments and coastal areas near active volcanoes have specific ecosystems in many regions of the world primarily because of availability of…

Stable isotopes δD–H2O, δ18O–H2O, δ15N–, δ18O– and hydrochemistry of the volcanic catchments and the influence of continental runoff on the environment of Eastern Kamchatka #stableisotopes www.sciencedirect.com/science/arti...

Dual-phase nitrogen transport from swine farms in a volcanic watershed of Jeju Island, South Korea: Insights from hydrochemical, isotopic and microbial analyses Intensive livestock farming in volcanic watersheds creates complex nitrogen pollution pathways that remain poorly understood. This study investigated …

Dual-phase nitrogen transport from swine farms in a volcanic watershed of Jeju Island, South Korea: Insights from hydrochemical, isotopic and microbial analyses #stableisotopes www.sciencedirect.com/science/arti...

Fossil isotope evidence for trophic simplification on modern Caribbean reefs - Nature Using nitrogen isotopes from ancient and modern fish otoliths and corals, the study shows Caribbean reef food webs are now 60–70% shorter and functionally less diverse, indicating human-driven tr...

Lueders-Dumont, J.A., O’Dea, A., Dillon, E.M. et al. Fossil isotope evidence for trophic simplification on modern Caribbean reefs. #stableisotopes Nature (2026). doi.org/10.1038/s415...

Differentiation of Ecological Niches in Trophic Specialists From a Disturbed Lacustrine Ecosystem: Insights from the Sympatric Lake Tana Labeobarbs (Cyprinidae) Lake Tana harbors the world's most complex adaptive radiation of cyprinids in the world. Although trophic specialization has been proven to drive this diversification, the diet of endemics has been s...

Differentiation of Ecological Niches in Trophic Specialists From a Disturbed Lacustrine Ecosystem: Insights from the Sympatric Lake Tana Labeobarbs (Cyprinidae) - Esin - 2026 - Ecology and Evolution #stableisotopes onlinelibrary.wiley.com/doi/full/10....

Brown Bear Consumption of Pacific Salmon Varies Greatly Among Individuals but Increases With the Bear's Age and Salmon Availability Hair was sampled in a noninvasive manner from free-living brown bears in Alaska and processed for genetic identification and stable isotopes. These data revealed great individual variation in bear re...

Brown Bear Consumption of Pacific Salmon Varies Greatly Among Individuals but Increases With the Bear's Age and Salmon Availability - Quinn - 2026 - Ecology and Evolution #stableisotopes onlinelibrary.wiley.com/doi/full/10....

Anchoveta and sardine feeding responses to environmental variations in the central and south Humboldt Current System revealed by stable isotopes doi.org/10.3354/meps... #stableisotopes