#stableIsotopes

@marinefreshwater.bsky.social

22 hours ago

By analysing #stableisotopes, Fontaine et al. showed these species occupy high trophic positions but differ in resource use, migration and habitat exploitation.

Despite overlap in isotope niche space, subtle differences in foraging likely shape how these predators structure pelagic ecosystems.

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Tang, S., Qiao, Y., Xia, J. et al. Joint control of precipitation and CO2 on global long-term patterns of plant nitrogen availability. #stableisotopes Nat Commun (2026). doi.org/10.1038/s414...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Predation threat affects isotope ratios of planktonic consumers - Oecologia The analysis of stable isotopes of carbon and nitrogen is widely used in ecological investigations. However, sources of variation in isotope ratios of animals are far from being identified, which may ...

Brzeziński, T., Bojanowski, M. & Radzikowska, M. Predation threat affects isotope ratios of planktonic consumers. Oecologia 208, 9 (2026). doi.org/10.1007/s004... #stableisotopes

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Evaluation of calibration strategies for accurate δ13CH4 measurements in dry and humid air Abstract. Accurate determination of the methane isotopic composition (δ13CH4) is essential for attributing emission sources of methane (CH4). However, for measurements with optical instruments, spectr...

Li, J., Chi, X., Ding, A., Ju, W., Zhang, Y., Chen, J. M., and Chen, H.: Evaluation of calibration strategies for accurate δ13CH4 measurements in dry and humid air, Atmos. Meas. Tech., 19, 1763–1781, doi.org/10.5194/amt-..., 2026. #stableisotopes

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Deciphering the geological significance of carbonate clumped-isotope-based temperature during the Permian-Triassic transition in South China Carbonate clumped isotope (Δ47) thermometry provides a powerful means of reconstructing paleotemperatures independently of the oxygen-isotope composit…

Deciphering the geological significance of carbonate clumped-isotope-based temperature during the Permian-Triassic transition in South China #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Optimal maternal feeding isotopic niche: influence of breeder trophic behaviour on larval growth and survival in bluefin tuna species Maternal effects play a fundamental role in shaping early larval growth and survival in marine fishes. This study explores the relationship between ma…

Optimal maternal feeding isotopic niche: influence of breeder trophic behaviour on larval growth and survival in bluefin tuna species #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Tectonic evolution of the Paleoproterozoic Francevillian Basin and implications for the Lomagundi Carbon Isotope Excursion The 2.2–2.06 Ga Lomagundi Carbon Isotope Excursion (LCIE), Earth’s most pronounced and long-lasting carbon isotope anomaly, corresponds to the latter …

Tectonic evolution of the Paleoproterozoic Francevillian Basin and implications for the Lomagundi Carbon Isotope Excursion #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Isotopic insights into nutrient contributions and transport pathways in north-central Florida Bay Coastal nutrient loading is a primary driver of changes to habitat structure, species diversity, and increases in hypoxia and harmful algal blooms in …

Isotopic insights into nutrient contributions and transport pathways in north-central Florida Bay #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Correcting Lipid Extraction Effects on Nitrogen Isotopic Values (δ15N) in Cetacean Skin Stable isotopes of carbon (δ13C) and nitrogen (δ15N) are widely used to study the feeding ecology of cetaceans, as they provide critical insights into diet and migratory behaviors. Lipids in tissues ....

Correcting Lipid Extraction Effects on Nitrogen Isotopic Values (δ15N) in Cetacean Skin - Cabrol - 2026 - Marine Mammal Science #stableisotopes onlinelibrary.wiley.com/doi/full/10....

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Enrichment and nitrogen preference of heterotrophic nitrifying bacteria in the maize rhizosphere Heterotrophic nitrification (ONrec) is a crucial pathway of nitrate (NO3−) production in acidic soils. While plants are known to stimulate ONrec, the …

Enrichment and nitrogen preference of heterotrophic nitrifying bacteria in the maize rhizosphere #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

Grazing intensity shifts plant–microbe competition for ammonium and nitrate in temperate grasslands - Iqbal - 2026 - Journal of Ecology #stableisotopes besjournals.onlinelibrary.wiley.com/doi/abs/10.1...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

1 day ago

The first application of secondary ion mass spectrometry for the analysis of δ18O in otoliths of larval fish The stable isotope ratio of oxygen (δ18O) stored in otoliths is a common and reliable tool for studying life history events including natal origin and migratory behavior of marine fish species. This ...

The first application of secondary ion mass spectrometry for the analysis of δ18O in otoliths of larval fish - Mnich - 2026 - Limnology and Oceanography: Methods #stableisotopes aslopubs.onlinelibrary.wiley.com/doi/abs/10.1...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

3 days ago

Reliability of quartz-hosted melt inclusions and discrete rhyolite reservoirs revealed by H isotopes, trace elements, and volatiles | Science Advances www.science.org/doi/10.1126/... #stableisotopes

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

4 days ago

Towards stable chemical fossils for anaerobic ammonium-oxidizing bacteria in palaeoenvironmental studies: novel cyclic aliphatic hydrocarbons as potential dia- and catagenetic products of ladderane li... Anaerobic ammonium oxidation (anammox) is an important process in modern global nitrogen cycling. However, the contribution of anammox to ancient nitr…

Towards stable chemical fossils for anaerobic ammonium-oxidizing bacteria in palaeoenvironmental studies: novel cyclic aliphatic hydrocarbons as potential dia- and catagenetic products of ladderane lipids #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

4 days ago

Intensive methane seep region on the outer East Siberian Arctic Shelf shows biomarker evidence for aerobic oxidation of methane The shallow East Siberian Arctic Shelf (ESAS) shows high methane concentration in seawater; however, methane oxidation processes for the ESAS are poor…

Intensive methane seep region on the outer East Siberian Arctic Shelf shows biomarker evidence for aerobic oxidation of methane #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

4 days ago

Generation of Nitrite from Residual Urea on Leafy Vegetables Caused by Water Vapor Condensation Leaves are ubiquitous substrates for multiphase reactions, with growing evidence indicating that various multiphase reactions occurring on leaf surfaces influence the transformation of chemicals adsorbed by leaves. However, the critical role of ambient water in mediating such multiphase reactions on leaf surfaces has often been overlooked. Here, using isotopic tracing techniques, we demonstrate that reactive oxygen species generated in the leaf surface condensate can mediate the oxidation of urea adsorbed on leaves, leading to the formation of nitrite (NO2–). This phenomenon is widespread across various leafy vegetables. At 5 °C and an 80% relative humidity (RH), condensate-mediated oxidation of residual urea on leaf surfaces resulted in NO2– accumulation exceeding the food limit standard. Hydroxyl radicals (•OH), amino radicals (•NH2), and nitric oxide radicals (•NO) were produced during water vapor condensation, collectively driving the conversion from urea to NO2–. Density functional theory calculations verified that radical-mediated transformation occurs spontaneously. Further studies indicate that controlling urea residues on vegetable leaves below 60 ppm and maintaining RH in cold storage below 60% can effectively suppress NO2– formation. Our results demonstrate that water vapor condensation on leaf surfaces can influence the oxidation of organic compounds adsorbed by leaves, providing new insights into the environmental transformation of organic pollutants on plant surfaces.

Generation of Nitrite from Residual Urea on Leafy Vegetables Caused by Water Vapor Condensation | Environmental Science & Technology pubs.acs.org/doi/10.1021/... #stableisotopes

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

4 days ago

Activating specific N2O production pathways to understand emission dynamics in wastewater treatment Reducing nitrous oxide (N₂O) emissions from wastewater treatment plants is essential for achieving the sector’s net-zero goals by 2050. Yet the comple…

Activating specific N2O production pathways to understand emission dynamics in wastewater treatment #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

4 days ago

Generation of Nitrite from Residual Urea on Leafy Vegetables Caused by Water Vapor Condensation Leaves are ubiquitous substrates for multiphase reactions, with growing evidence indicating that various multiphase reactions occurring on leaf surfaces influence the transformation of chemicals adsor...

Generation of Nitrite from Residual Urea on Leafy Vegetables Caused by Water Vapor Condensation | Environmental Science & Technology pubs.acs.org/doi/10.1021/... #stableisotopes

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

4 days ago

δ15N and δ13C of pine sapling needles as indicators of enhanced N cycling and ameliorated acidity by alkaline fly ash application in artificially acidified soils - Biology and Fertility of Soils Alkaline fly ash (FA) has potential as a soil amendment for acidic forest soils, leading to improved soil conditions and tree growth. Such improvements may be reflected in the stable isotope ratios of...

Park, HJ., Lee, KS., Baek, N. et al. δ15N and δ13C of pine sapling needles as indicators of enhanced N cycling and ameliorated acidity by alkaline fly ash application in artificially acidified soils. #stableisotopes Biol Fertil Soils 62, 383–393 (2026). doi.org/10.1007/s003...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

4 days ago

Mycorrhizal type overrides leaf trait in governing nitrification and ammonia oxidizers: evidence from DNA-SIP in a subtropical forest - Biology and Fertility of Soils Forest vegetation shifts significantly alter soil nitrogen (N) cycling, yet the relative contributions of mycorrhizal associations and leaf traits remain debated. To address this, we combined DNA-stab...

Zhou, X., Lee, J., Yang, Y. et al. Mycorrhizal type overrides leaf trait in governing nitrification and ammonia oxidizers: evidence from DNA-SIP in a subtropical forest. Biol Fertil Soils 62, 277–289 (2026). doi.org/10.1007/s003... #stableisotopes

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

4 days ago

Triple Oxygen Isotopes Reveal Anthropogenic Overprinting of Riverine Sulfate Sources in the Yellow River Basin, China Riverine sulfate, primarily derived from the weathering of continental sulfur-bearing minerals, plays a key role in shaping the isotopic composition of marine sulfate. In arid regions, gypsum dissolut...

Triple Oxygen Isotopes Reveal Anthropogenic Overprinting of Riverine Sulfate Sources in the Yellow River Basin, China | Environmental Science & Technology pubs.acs.org/doi/10.1021/... #stableisotopes

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

4 days ago

Dempsey, B., Buchwald, C. Nitrate stable isotopes complement subarctic new production estimates. #stableisotopes Commun Earth Environ (2026). doi.org/10.1038/s432...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

5 days ago

Fecal pellet packaging enhances marine carbon sequestration Fecal pellets produced by marine zooplankton contribute substantially to transporting biologically fixed carbon from the sunlit sea surface into deeper water layers. Their occurrence and composition ...

Fecal pellet packaging enhances marine carbon sequestration - Karthäuser - 2026 - Limnology and Oceanography #stableisotopes aslopubs.onlinelibrary.wiley.com/doi/full/10....

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

5 days ago

Nitrate Availability Modulates the Temperature Sensitivity of N2O and N2 Production From Denitrification N2O is a potent greenhouse gas with denitrification in sediments and soils representing a major source, yet its response to warming under varying nitrate conditions remains poorly constrained. Combin....

Nitrate Availability Modulates the Temperature Sensitivity of N2O and N2 Production From Denitrification #stableisotopes onlinelibrary.wiley.com/doi/full/10....

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

5 days ago

Integrating Molt Migration Into Physiological Assessments of Inter‐Population Stress in a Globally Endangered Species Feather corticosterone (fCORT) provides a powerful indicator of population-level physiological responses to human disturbance, yet its interpretation is complicated by variation across taxa, habitats...

Integrating Molt Migration Into Physiological Assessments of Inter‐Population Stress in a Globally Endangered Species - Bai - 2026 - Ecology and Evolution #stableisotopes onlinelibrary.wiley.com/doi/full/10....

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

5 days ago

Changes in natural 15N abundance highlight warming-induced stimulation of soil nitrate losses by coupled nitrification–denitrification in an old-growth montane forest Climate warming alters biogeochemical cycles, especially in high-altitude forests where warming accelerates soil organic matter decomposition and CO2 …

Changes in natural 15N abundance highlight warming-induced stimulation of soil nitrate losses by coupled nitrification–denitrification in an old-growth montane forest #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

5 days ago

Long term low-level nitrogen addition enhances microbial carbon use efficiency and turnover rate across different seasons Microbial carbon use efficiency (CUE) is a key parameter in regulating the soil microbial C cycle, influencing C mineralization, turnover, and sequest…

Long term low-level nitrogen addition enhances microbial carbon use efficiency and turnover rate across different seasons #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

5 days ago

Diet, phenology and body size shape nutrient release by songbirds Read the free Plain Language Summary for this article on the Journal blog.

Diet, phenology and body size shape nutrient release by songbirds - Chen - Functional Ecology #stableisotopes besjournals.onlinelibrary.wiley.com/doi/full/10....

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

5 days ago

13C-traced microbial CO2 fixation in grassland topsoil: More bacterial necromass carbon enrichment than shrub and forest soils Although CO2-fixing microorganisms contribute to the soil organic carbon (SOC) pool via organic metabolites, their roles in driving microbial biomass …

13C-traced microbial CO2 fixation in grassland topsoil: More bacterial necromass carbon enrichment than shrub and forest soils #stableisotopes www.sciencedirect.com/science/arti...

Stable Isotope Ecology (CER, Kyoto Univ.)

@stableisotopeecol.bsky.social

5 days ago

Impacts of human activities and hydrological processes on monthly riverine nitrate sources and transport in the Agro-Pastoral ecotone Nitrate pollution in agro-pastoral rivers is becoming increasingly severe, exhibiting pronounced spatiotemporal variability driven by anthropogenic an…

Impacts of human activities and hydrological processes on monthly riverine nitrate sources and transport in the Agro-Pastoral ecotone #stableisotopes www.sciencedirect.com/science/arti...