#StableIsotope
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avianbiology.bsky.social
#hormone #adaptation #migration #phenology #photoperiod #stableisotope <a href="https://bsky.app/profile/did:plc:xcdhjuzb7t6aqdy5ii5q275y" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky-mention">@NordicOikos.bsky.social
June 17, 2025 at 12:05 AM
isotopesrule.bsky.social
A new job for #StableIsotope & #massspectrometer enthusiasts for 6 years in the @clusterroots.bsky.social at @uni-kiel.de: Responsibility for running the machines & for measurements. Science people, do not be put off by the word "Engineer". Deadline 31.12.25. Link: www.uni-kiel.de/personal/de/...
Aktuelle Ausschreibungen
Aktuelle Ausschreibungen
www.uni-kiel.de
November 13, 2025 at 11:52 AM
kimbaublys.bsky.social
😝 to my husband, who says I can't math

It's the end of a 30-hour analytical run & there are only 5 slots left in the EA file before it's full & I have 5 samples left to run, plus only 1 hour until 4pm Friday end of work week

I wasn't 💯 of my sums 😁

Time to wine+relax
#StableIsotope
#Science
🧪
Screen pic showing mass spec stable isotope EA file and IRMS task list. Both have 5 things left to do.
May 23, 2025 at 4:55 AM
sablesys.bsky.social
Interested in measuring #metabolite oxidation? In this video, Ken McKenna, PhD, explains how to use the Promethion Core #metabolic phenotyping system & the #StableIsotope Analyzer to measure #13C breath tracers. 🧪

ow.ly/MyZk50Uq4Oi

#Metabolism #Respirometry #IsotopeTracing
Calculating the rate for oxidation for 13C breath tracers
Ken McKenna, PhD, demonstrates how to calculate metabolic tracer oxidation using the Promethion Core metabolic phenotyping system coupled with the Sable Stable Isotope Analyzer.
ow.ly
December 12, 2024 at 11:29 PM
seabirdresearch.bsky.social
We used a #stableisotope mixing model to estimate % contribution of #centipede prey to centipede tissues to infer #diet composition. 🧑‍🔬We spent many months in the field studying centipede #foraging and monitoring Black-winged Petrel (BWPE) #chicks 🐣
November 30, 2024 at 5:53 AM
conphysjournal.bsky.social
How do we precisely track a bear's diet over time? 🐻 New research tests two #NonInvasive methods (dyeing & #StableIsotope tracing) to quantify hair growth rates in bears (Grizzly, Black, & Polar). This will help us understand bear seasonal diet data! 🧬📈

Read it here ➡️ doi.org/10.1093/conp...
December 15, 2025 at 9:57 AM
wslresearch.bsky.social
🌲 #JobAlert! MSc in #Environmental Sciences or a related field? Experience in preparing wood samples for #StableIsotope and #radiocarbon analysis? Our #Dendrosciences group offers a position for a #technician: apply.refline.ch/273855/1763/... #ScienceJobs #dendrochronology
Job offer: Technician in Palaeoclimatology/-ecology 80% (f/m/d) As part of the SNSF-project Signatures of Global Late Glacial Climate Change in Tree­Ring Records (SiGnaL), co-led by the Dendrosciences Group at WSL and the Laboratory of Ion Beam Physics (LIP) at ETH Zurich, you will support research on the nature and drivers of abrupt climate changes during the Late Glacial period (approximately 11’000-15’000 years ago). You will assist three PhD researchers in dating, measuring, and synchronizing tree-ring samples from preserved subfossil wood across several regions. This will help refine our understanding of Late Glacial climate dynamics and contribute to improvements of the global radiocarbon calibration curve.Your main tasks will involve surface preparation and high-resolution scanning of subfossil tree-ring material, sample preparation for stable isotope analysis (δ¹³C / δ¹⁸O / δ²H) including image-based tree-ring width measurements, cutting of individual tree rings, cellulose extraction and homogenization, and packing of samples for isotope ratio mass spectrometry (IRMS). In addition, you will contribute to the production of quantitative wood anatomical (QWA) data by preparing wood microsections and image-based measurements of cell structures using the software ROXAS. You preferably hold a Master's degree in Environmental Sciences, Earth Sciences, or a related field and have demonstrated experience in preparing wood samples for stable isotope, QWA, and/or radiocarbon analysis. ldeally, you are familiar with dendrochronology and laboratory work, enjoy contributing to methodological advancements, and have interest in interdisciplinary and international research. You work independently, structured and accurate, are communicative and team-oriented, and have very good spoken and written English language skills.
August 26, 2025 at 6:28 AM
kimbaublys.bsky.social
The #GroundWater + gas sampling trip you plan for vs reality.
Sampling conditions are not always ideal, so we set out to compare the #stableisotope results from a variety of sample containers.
🧪

www.sciencedirect.com/science/arti...
Comparing greenhouse gas stable isotopes from different sampling methods: Aquifer groundwater and coal seam gas production waters
Methane and carbon dioxide are ubiquitous in aquifers and are gaining increased attention through global warming. The stable carbon and hydrogen isoto…
www.sciencedirect.com
June 27, 2025 at 2:15 AM
wslresearch.bsky.social
🪵 #PhDAlert! MSc in #Environmental Sciences or a related field? Experience in #radiocarbon and #StableIsotope measurements? Our #Dendrosciences group is offering a 4-year #PhD position in #palaeoclimatology & #palaeoecology: apply.refline.ch/273855/1764/... #ScienceJobs #dendrochronology #dendrology
Job offer: PhD student in Palaeoclimatology/-ecology (f/m/d) As part of the SNF-project Signatures of Global Late Glacial Climate Change in Tree-Ring Records (SiGnaL), co-led by the Dendrosciences group at WSL and the Laboratory of Ion Beam Physics (LIP) at ETH Zurich, you will, along with two other PhD students and technicians, contribute to understanding the nature and drivers of abrupt climate changes during the Late Glacial period (approximately 11’000-15’000 years ago). Your work will include the collection, measurement, and integration of fossil wood and tree-ring material from various global sites. Through a multi-proxy approach - combining radiocarbon dating, stable isotope ratios, and quantitative wood anatomy - you will help to date and synchronize records across regions and reconstruct regional to global climate dynamics. This will help refine our understanding of Late Glacial climate dynamics and contribute to improvements of the global radiocarbon calibration curve. You have a Master's degree in Environmental Sciences, Earth Sciences, or a related field, and preferably have already gained experience with radio-carbon and stable isotope measurements. You are comfortable analyzing and visualizing data in R or Python and are motivated to publish your results in scientific journals. You enjoy to work in the lab, with large datasets, and have an interest in interdisciplinary and international research. You like to work independently, structured and accurate. You are communicative and team-oriented and have excellent spoken and written English language skills as well as at least the knowledge of one Swiss national language.
August 28, 2025 at 6:45 AM
ecologicalresearch.bsky.social
#OpenAccess
Intercolony and Intra-Annual Variations in Isotopic Niche of Red-Footed Boobies Sula sula in the Tropical Indian Ocean

Jennifer Appoo @jenniferappoo.bsky.social et al
doi.org/10.1111/1440...

diet/ seabird/ Seychelles/ #stableisotope analysis/ trophic ecology
#ornithology
Graphical abstract: We compared the diet and assessed geographic and seasonal variations in the isotopic niches of red-footed boobies across three Indian Ocean atolls. Our results demonstrate plasticity in both diet and trophic niche, likely driven by local environmental conditions, breeding stages, and colony-specific factors. By establishing these ecological baselines, our study provides essential data to support the long-term monitoring of this widely occurring seabird within the rapidly changing tropical Indian Ocean.
May 11, 2026 at 5:16 AM
kimbaublys.bsky.social
FIGJAM my within run, duplicate injections of a mixed gas are looking good after a slow start.
It must be due to the 2 Tim tams that I snavelled after lunch
#StableIsotope #Geochemistry
Pic of a GC-IRMS result where within run injections of a mixed gas show near perfect agreement. 13C in methane and CARBONdioxide
November 2, 2023 at 6:10 AM
stableisotopeecol.bsky.social
Liao, J., Mao, J., Peng, J. et al. Global variation of plant nitrogen acquisition strategies and their responses to decreasing nitrogen availability. #stableisotope Nat Commun (2026). doi.org/10.1038/s414...
Global variation of plant nitrogen acquisition strategies and their responses to decreasing nitrogen availability - Nature Communications
Nitrogen is essential for plant growth and carbon uptake, and plants obtain it from soils, the atmosphere, and recycled leaf nutrients. This study maps these three nitrogen pathways globally and shows...
doi.org
July 24, 2026 at 12:05 PM
wbs2021.bsky.social
📰Research article:

🐟Land use extent and intensity affect the trophic structure of apex fish in #neotropical lagoons

📝Vinícius Andrade Urbano et al.
doi.org/10.1016/j.wa...

#Assimilation #EnvironmentalImpact #Niche #RiparianVegetation #StableIsotope
July 21, 2026 at 2:12 AM
jebyrnes.bsky.social
Question for the #remotesensing and #stableisotope crowds - has anyone applied SI mixing models from #ecology to Multiple endmember spectral mixture analysis (MESMA) in remote sensing? They seem like kinda the same thing conceptually & I know mixing models have been leaping fwd
November 23, 2024 at 5:20 AM
stableisotopeecol.bsky.social
Nitrogen Redox Controls on Greenhouse Gas Production in Yedoma Taliks #stableisotope onlinelibrary.wiley.com/doi/full/10....
Nitrogen Redox Controls on Greenhouse Gas Production in Yedoma Taliks
Arctic Yedoma permafrost holds large carbon and nitrogen pools that, when thawed, undergo microbially mediated processes that release greenhouse gases like methane and nitrous oxide. We analyzed seas...
onlinelibrary.wiley.com
July 30, 2025 at 6:31 AM
camimartin.bsky.social
We joined other experts in neonatal nutrition and NEC, who have discussed the science and implications.
🧠 Abrams on losing bovine-derived options for NICU nutrition: doi.org/10.1016/j.a...
More links below.
#Neonatology #NEC #PretermNutrition #neotwitter @stableisotope
What would happen in the United States if there were no cow milk-based preterm infant nutritional products: historical perspective and evaluation of nutrient-related challenges
Recent litigation has led to a situation where preterm cow milk-based infant nutritional products (PCMBPs) may soon have limited or no availability in…
doi.org
May 29, 2025 at 10:06 AM
elte-rch-iag.bsky.social
Momentum #Bioarchaeology Research Group looking for postdocs to join #interdisciplinary study of #Roman #Pannonia in Budapest via MSCA fellowship programme.
Application deadline: 10th January, 2026.
More info: agi.abtk.hu/en/staff/car...
#aDNA#stableisotope#anthropology#metagenomics#archaeology
November 14, 2025 at 9:13 AM
symbiostoic.bsky.social
Open position: postdoctoral fellowship in marine biogeochemistry. Join the #marinesymbiomes group @SznDohrn, btw #Genova and #Napoli & apply #stableisotope approaches to understand #marine #ecosystem functioning! Make the #ocean your office!

marinesymbiomes.eu/2022/11/23/ope…
December 15, 2024 at 4:09 PM
symbiostoic.bsky.social
Still a few days left to apply for this exciting Postdoc opportunity! Join the #marinesymbiomes group @SznDohrn, btw #Genova and #Napoli & apply #stableisotope approaches to understand #marine #ecosystem functioning! Make the #ocean your office!

x.com/symbiostoic/st… marinesymbiomes.eu
December 15, 2024 at 4:08 PM
symbiostoic.bsky.social
#Postdoc position @SznDohrn to work with me and Francesca Margiotta on "fluxes of matter and energy in #marine ecosystems by #stableisotope analysis". Docs are in #italian but DM me if interested! Please RT!

shorturl.at/htNTY
December 15, 2024 at 4:08 PM
joeymaier.bsky.social
#Stableisotope analysis of #wolf teeth to see how many #seaotter they are eating? Interesting....

#GrayWolves Are Hunting Sea Otters – and Scientists Don’t Know How share.google/TIS4wsYswfYW...
Gray Wolves Are Hunting Sea Otters – and Scientists Don’t Know How
On a remote Alaskan island, gray wolves are displaying an unexpected hunting strategy by targeting sea otters, hinting at a little-known connection between marine and terrestrial ecosystems.
share.google
January 12, 2026 at 10:13 PM