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Paul Szejner

@pszejner.bsky.social
548 followers 1.4K following 12 posts

Forest ecologist, based in (Luke.fi) Finland. I study stable isotopes in water, plants, and tree rings to understand the relationships between plant physiology and environmental changes. www.paulszejner.com

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Reposted by Paul Szejner
Bill Smith @wkolby.bsky.social · 15/09/2026
Happy to share a new paper from a field campaign with an amazing team: "Experimental evidence of a biological soil crust degradation climate warming amplification feedback," with @ecology-awesome.bsky.social @villarreal-miguel.bsky.social and others www.nature.com/articles/s43...
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Paul Szejner @pszejner.bsky.social · 06/05/2026
Check this new paper out! by Kersti Leppä et al ! Interpreting inter- and intra-annual environmental signals in tree-ring δ18O using isotope-enabled modeling academic.oup.com/treephys/art...
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Dr Charlotte Angove @char-angove.bsky.social · 20/05/2025
New 📄, led by @pszejner.bsky.social : Intra-annual variability of tree-ring d18O can be dampened by opposing seasonal trends in the d18O of sugars and source water! doi.org/10.1111/nph....
doi.org
Opposing seasonal trends in source water and sugar dampen intra‐annual variability in tree rings oxygen isotopes
Variations of oxygen isotopes δ18O in tree rings provide critical insights into past climate and tree physiological processes, yet the mechanisms shaping the intra-annual δ18O signals remain incompl...
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Paul Szejner @pszejner.bsky.social · 21/05/2025
Take a look at our new paper! Opposing seasonal trends in source water and sugar dampen intra‐annual variability in tree rings oxygen isotopes - Szejner - New Phytologist - Wiley Online Library nph.onlinelibrary.wiley.com/doi/10.1111/...
nph.onlinelibrary.wiley.com
Opposing seasonal trends in source water and sugar dampen intra‐annual variability in tree rings oxygen isotopes
Variations of oxygen isotopes δ18O in tree rings provide critical insights into past climate and tree physiological processes, yet the mechanisms shaping the intra-annual δ18O signals remain incompl...
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Yadvinder Malhi @ymalhi.bsky.social · 06/03/2025
Tropical forests are not all the same: they show many shades of geographical variation. Our new paper in Nature led by @jeaggu.bsky.social combines field and satellite data to make a first map the canopy functional traits of the world’s tropical forests: www.nature.com/articles/s41...
nature.com
Canopy functional trait variation across Earth’s tropical forests - Nature
Data from a variety of sources—including satellite, climate and soil data, as well as field-collected information on plant traits—are pooled and analysed to map the functional diversity of tropical fo...
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Bill Smith @wkolby.bsky.social · 27/01/2025
Happy to share a new paper, "Effects of Hot Versus Dry Vapor Pressure Deficit on Ecosystem Carbon and Water Fluxes," led by the amazing Miriam Johnston w/ @mallorybarnes.bsky.social and others agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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Nature Reviews Earth & Environment @natrevearthenviron.nature.com · 15/01/2025
New online! Refining past climate records with wood anatomy
go.nature.com
Refining past climate records with wood anatomy
Nature Reviews Earth & Environment, Published online: 15 January 2025; doi:10.1038/s43017-025-00643-4Julie Edwards explains how quantitative wood anatomy helps refine records of past climate.
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Paul Szejner @pszejner.bsky.social · 14/01/2025
Question: Is this a day time Aurora? Or just some sort or rainbow?
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Arthur Gessler @arthurobuntspecht.bsky.social · 24/12/2024
🌲 Trees have long memories! Our study shows Scots pine trees remember past water abundance even 7 years after irrigation stops! bsapubs.onlinelibrary.wiley.com/doi/full/10....
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Paul Szejner @pszejner.bsky.social · 19/12/2024
did you know IsoBank is a collaborative open-access repository for stable isotope data, launched in 2021 to enhance interdisciplinary research, standardize metadata, and promote data accessibility across scientific disciplines.👇 journals.plos.org/plosone/arti...
journals.plos.org
Design, development, and implementation of IsoBank: A centralized repository for isotopic data
Stable isotope data have made pivotal contributions to nearly every discipline of the physical and natural sciences. As the generation and application of stable isotope data continues to grow exponent...
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Paul Szejner @pszejner.bsky.social · 19/12/2024
Tree-ring oxygen isotope records from Polylepis tarapacana provide insights into hydroclimate variability in the southern Tropical Andes, highlighting connections to monsoon dynamics and regional climate patterns. www.sciencedirect.com/science/arti...
sciencedirect.com
Hydroclimate variability in the Tropical Andes recorded by δ18O isotopes from a new network of Polylepis tarapacana tree-rings
Stable oxygen isotopes records (δ18O) in tree-rings are commonly used to assess the response of trees to environmental variability being a valuable to…
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Arthur Gessler @arthurobuntspecht.bsky.social · 19/12/2024
Published in @newphyt.bsky.social: Our new paper highlights the significant role of ecological memory and legacy effects in determining tree responses to environmental changes nph.onlinelibrary.wiley.com/doi/10.…
The figure shows resistivity tomography results in the soil of different long-term treated forest plots - they are indicative for the soil water content.
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Paul Szejner @pszejner.bsky.social · 18/12/2024
Job alert! The Natural Resources Institute Finland (Luke.fi) is looking for a Research Professor in Forest Growth and Yield.
valtiolle.fi
Research Professor in Forest Growth and Yield - Natural Resources Institute Finland
Open job: Research Professor in Forest Growth and Yield, Natural Resources Institute Finland - Find all jobs in Valtiolle.fi
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Nezha Acil @n-acil.bsky.social · 15/11/2024
How are disturbances shaped across the world’s #forests and how are humans influencing these patterns? We built a global map of forest disturbance structures to explore these questions. Check out my first paper in Nature Sustainability @natureportfolio.bsky.social www.nature.com/articles/s41...
nature.com
Landscape patterns in stand-replacing disturbances across the world’s forests - Nature Sustainability
Forests are subject to natural and human-induced disturbances, which can be important in shaping their form and function. In this study, the authors examine the landscape patterns of global forest dis...
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Grant Hamilton 🐨 @ecologygrant.bsky.social · 13/12/2024
Are you a scientist that analyses/creates models using data from cameras, acoustics, drones or satellites to understand biodiversity? Join the Biodiversity Monitoring starter pack. Point me to your research to be added. ECRs and PhDs welcome! 🧪🌏 #AI #conservation go.bsky.app/eFMQQX
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Martin De Kauwe @mdekauwe.bsky.social · 11/12/2024
📢 18-month postdoc in my lab doing drought modelling with either the UK land surface model JULES or machine learning. Up to you which. Please share widely (thanks) www.bristol.ac.uk/jobs/find/de... Closes: 18th January
European summer droughtJULES land surface model
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Matthias Sprenger @matthiasprenger.bsky.social · 11/12/2024
We had a great morning at #AGU24 today with lots of exciting stable isotopes studies investigating the Critical Zone. People showed interesting water, carbon and nitrate isotope application in various environments. Fortunately, we allocated sufficient time for discussion which was well received. 👇
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Elisabet Martínez-Sancho @elimartinezs.bsky.social · 08/12/2024
I am excited to announce that we are organising again the #treering session at #EGU25. 🌲💍Abstract submission is now open until Jan 15. tinyurl.com/sbdt4ezp KerstinTreydte Jernej Jevšenak Annemarie Eckes-Shephard and Pieter Zuidema #dendrochronology
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Dr. Tanya Harrison @tanyaofmars.bsky.social · 08/12/2024
This conference tagline for #AGU24 hits harder than intended post-election...
Sign for AGU24 that reads "What's next for science"
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Julia Koricheva @juliakoricheva.bsky.social · 07/12/2024
📣 Fully funded PhD project supervised by me & @philstevenson.bsky.social within @treesdla.bsky.social on effects of forest diversity on floral reward production for pollinators. Nice mix of fieldwork in Finland & pollen and nectar chemistry 🐝🌼🌳🌲 🧪🌍 Apply by 20 Jan www.trees-dla.ac.uk/projects/eff...
Diagram showing how tree species diversity can influence understory plants through changes in microclimate which in turn affects phenology and nectar and pollen quantity and quality. This may affect pollinator visits and plant fitness
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Tim Osborn @timosbornclim.bsky.social · 11/11/2024
I've made a starter pack of those with interests in tree-ring science e.g. dendroclimatology, dendrochronology, dendroecology. Please let me know if you'd like to be added (or removed!) or to suggest others to add go.bsky.app/LXrT3xb
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Martin Dovciak🌳🌱🌻 @dovciak-lab.bsky.social · 23/11/2024
🌎🧪Forest Ecology Starter Pack now available for those studying various aspects of forest 🌲🌳🌴ecosystems. The starter pack is limited to 150 names & it is now full. To grow your network: follow folks, get followed, re-post, & enjoy! go.bsky.app/8ZNK9jy
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Sam Reed @sampowersreed.bsky.social · 11/11/2024
I know we have a million starter packs right now, but I think we need one for forest management & policy! I know I missed a ton of people, so if you'd like to be added, please message me (particularly you tropical foresters). Or, if you don't want to be on this list, lmk!
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Marco M. Lehmann @lehmannmm.bsky.social · 02/12/2024
First things first!! Our simple but efficient method for the simultaneous determination of #carbon, #oxygen, #hydrogen in a sample, e.g. #cellulose, #sugar and organic material, is now published in Rapid Communications in #Mass #Spectrometry: doi.org/10.1002/rcm..... Happy reading and measuring!
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Prof Lisa Schipper 🌍🍉💪 @lisaschipper.bsky.social · 30/11/2024
For new people, this is a great way to find environmental social scientists: go.bsky.app/GNpJZBo
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Christiane Werner @chriswernerlab.bsky.social · 30/11/2024
On my way to my #TEDtalk on #climatechange impact on #forest. #ECOSENSE. Happy if you join me at 17:00 CET here: www.youtube.com/live/aECXaFy... 🌳🌲🧪
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Howard Lee @hlee.bsky.social · 30/11/2024
🧪
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Matt Betts @mattbetts42.bsky.social · 23/11/2024
Super group of forest biodiversity folks accumulating here: go.bsky.app/Kgs8qMR
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Matthias C. Rillig @mrillig.bsky.social · 28/11/2024
How can we as environmental scientists engage with the public? Some notes from a lab meeting this week. Hope you find it interesting, and please feel free to add to the list. open.substack.com/pub/matthias...
open.substack.com
How can we as environmental scientists engage with the public?
Some thoughts from a lab brainstorming session
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Kai Kornhuber @kornhuber.bsky.social · 26/11/2024
'Global emergence of regional heatwave hotspots outpaces climate model simulations' our new paper in @pnas.org with S. Bartusek, R. Seager. J. Schellnhuber and M. Ting investigating the tail behaviour of extreme heatwave trends. @iiasa.ac.at @columbiaclimate.bsky.social @lamontearth.bsky.social
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Johannes Edvardsson @dendrolund.bsky.social · 21/11/2024
Continues to CT scan oak samples, mostly for fun (and it is). 🌳💍 #dendrochronology
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Jill Hamilton @jillahamilton.bsky.social · 14/11/2024
So excited to announce our department is hiring a tenure track position in Forest Ecophysiology! Happy to answer any questions about the position!! Join us in the Department of Ecosystem Science and Management at Penn State! psu.wd1.myworkdayjobs.com/en-US/PSU_Ac...
psu.wd1.myworkdayjobs.com
Assistant Professor of Forest Ecophysiology
APPLICATION INSTRUCTIONS: CURRENT PENN STATE EMPLOYEE (faculty, staff, technical service, or student), please login to Workday to complete the internal application process. Please do not apply here, a...
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William Hammond @wmhammond.bsky.social · 21/11/2024
Do you want to join my plant ecophysiology lab studying plant stress and mortality? I am hiring a biological scientist, a permanent research support position. Job posting and more information available here: explore.jobs.ufl.edu/en-us/job/53...
explore.jobs.ufl.edu
University of Florida - Details - Biological Scientist III
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Drew Peltier @peltierdrew.bsky.social · 29/10/2024
Still looking for applicants for two funded phd positions and a 2yr postdoc. Full ads: drewpeltier.com/opportunities 1) PhD position in climate adaptation science (SWCASC) 2) PhD position in memory effects in forest C cycle (NSF funded) 3) Postdoc position (2yr) in 14C/NSC
drewpeltier.com
Opportunities - Quantitative physiological ecology lab
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