Paul Szejner
@pszejner.bsky.social
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
Reposted by Paul Szejner
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...
doi.org
May 20, 2025 at 3:22 PM
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....
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/...
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...
nph.onlinelibrary.wiley.com
May 21, 2025 at 5:04 AM
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/...
Reposted by Paul Szejner
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...
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...
www.nature.com
March 6, 2025 at 7:49 AM
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...
Reposted by Paul Szejner
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/...
January 27, 2025 at 4:56 PM
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/...
Reposted by Paul Szejner
New online! Refining past climate records with wood anatomy
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.
go.nature.com
January 15, 2025 at 4:34 PM
New online! Refining past climate records with wood anatomy
Question: Is this a day time Aurora? Or just some sort or rainbow?
January 14, 2025 at 7:25 PM
Question: Is this a day time Aurora? Or just some sort or rainbow?
Reposted by Paul Szejner
🌲 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....
December 24, 2024 at 7:17 AM
🌲 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....
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...
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...
journals.plos.org
December 19, 2024 at 9:11 AM
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...
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...
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…
www.sciencedirect.com
December 19, 2024 at 9:09 AM
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...
Reposted by Paul Szejner
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
December 19, 2024 at 6:38 AM
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
Job alert! The Natural Resources Institute Finland (Luke.fi) is looking for a Research Professor in Forest Growth and Yield.
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
valtiolle.fi
December 18, 2024 at 10:02 AM
Job alert! The Natural Resources Institute Finland (Luke.fi) is looking for a Research Professor in Forest Growth and Yield.
Reposted by Paul Szejner
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...
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...
www.nature.com
November 15, 2024 at 11:15 AM
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...
Reposted by Paul Szejner
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
go.bsky.app/eFMQQX
December 13, 2024 at 4:21 AM
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
go.bsky.app/eFMQQX
Reposted by Paul Szejner
📢 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
www.bristol.ac.uk/jobs/find/de...
Closes: 18th January
December 11, 2024 at 10:31 AM
📢 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
www.bristol.ac.uk/jobs/find/de...
Closes: 18th January
Reposted by Paul Szejner
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. 👇
December 11, 2024 at 3:27 AM
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. 👇
Reposted by Paul Szejner
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
🌲💍Abstract submission is now open until Jan 15.
tinyurl.com/sbdt4ezp
KerstinTreydte Jernej Jevšenak Annemarie Eckes-Shephard and Pieter Zuidema
#dendrochronology
December 8, 2024 at 9:08 PM
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
🌲💍Abstract submission is now open until Jan 15.
tinyurl.com/sbdt4ezp
KerstinTreydte Jernej Jevšenak Annemarie Eckes-Shephard and Pieter Zuidema
#dendrochronology
Reposted by Paul Szejner
📣 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...
December 7, 2024 at 8:54 AM
📣 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...
Reposted by Paul Szejner
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
Please let me know if you'd like to be added (or removed!) or to suggest others to add
go.bsky.app/LXrT3xb
November 11, 2024 at 1:33 PM
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
Please let me know if you'd like to be added (or removed!) or to suggest others to add
go.bsky.app/LXrT3xb
Reposted by Paul Szejner
🌎🧪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
go.bsky.app/8ZNK9jy
November 23, 2024 at 1:49 PM
🌎🧪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
go.bsky.app/8ZNK9jy
Reposted by Paul Szejner
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!
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!
November 11, 2024 at 2:31 PM
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!
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!
Reposted by Paul Szejner
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!
December 2, 2024 at 6:05 PM
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!
Reposted by Paul Szejner
For new people, this is a great way to find environmental social scientists: go.bsky.app/GNpJZBo
November 30, 2024 at 12:57 PM
For new people, this is a great way to find environmental social scientists: go.bsky.app/GNpJZBo
Reposted by Paul Szejner
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... 🌳🌲🧪
November 30, 2024 at 12:09 PM
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... 🌳🌲🧪
Reposted by Paul Szejner
🧪
We (Rachel Howe, Anne-Marie Broomhall, Paul Bushby and me) are hosting a @royalastrosoc.bsky.social discussion meeting in London on 10 Jan, on "Dynamos, Dynamics, and the Solar Cycle at Cycle 25 Maximum. "
Abstract deadline is 16 Dec and the link is: docs.google.com/forms/d/e/1F...
Abstract deadline is 16 Dec and the link is: docs.google.com/forms/d/e/1F...
November 30, 2024 at 12:21 PM
🧪