Paul Szejner

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...

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....

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...

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/...

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...

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...

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/...

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.

New online! Refining past climate records with wood anatomy

Seems like a polar stratospheric cloud then! Thanks for the link as it was taken very up north in Finland...

Question: Is this a day time Aurora? Or just some sort or rainbow?

🌲 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....

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...

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...

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…

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...

The figure shows resistivity tomography results in the soil of different long-term treated forest plots - they are indicative for the soil water content.

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 https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.20245

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

Job alert! The Natural Resources Institute Finland (Luke.fi) is looking for a Research Professor in Forest Growth and Yield.

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...

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...

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

European summer drought

JULES land surface model

📢 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

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. 👇

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

Pretty cool stuf!! Not experpert on this tho.. but the one you are holding has a cactus like structure.

Sign for AGU24 that reads "What's next for science"

This conference tagline for #AGU24 hits harder than intended post-election...

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

📣 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...

Hi! Tim! Would you add me to the pack? 😊

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

🌎🧪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

What a great idea to start on this platform! Would be great to jump on this train!

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!

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!

For new people, this is a great way to find environmental social scientists: go.bsky.app/GNpJZBo

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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Super group of forest biodiversity folks accumulating here: go.bsky.app/Kgs8qMR