Ryan Sponseller
@ryansponseller.bsky.social
Umeå University (Sweden), Professor of Ecosystem Science
Reposted by Ryan Sponseller
I'm so excited to share our new paper in Global Change Biology: A network of 18 wildfire chronosequences reveals key environmental drivers and knowledge gaps in the boreal nitrogen balance, with @michael-gundale.bsky.social and others. doi.org/10.1111/gcb....
August 4, 2025 at 2:42 PM
I'm so excited to share our new paper in Global Change Biology: A network of 18 wildfire chronosequences reveals key environmental drivers and knowledge gaps in the boreal nitrogen balance, with @michael-gundale.bsky.social and others. doi.org/10.1111/gcb....
Reposted by Ryan Sponseller
Asymmetric competition among stream fishes: Do food web pathways affect competitive outcomes? - George - 2024 - Ecosphere - Wiley Online Library esajournals.onlinelibrary.wiley.com/doi/full/10....
Please check out our paper! Share too! #invasivespecies #ecology #foodweb #conservation
Please check out our paper! Share too! #invasivespecies #ecology #foodweb #conservation
Asymmetric competition among stream fishes: Do food web pathways affect competitive outcomes?
Limiting resources are often unevenly distributed among competing consumers, as larger, more aggressive, fast growing, early emerging, or rapidly reproducing species disproportionately exploit food o...
esajournals.onlinelibrary.wiley.com
July 17, 2025 at 12:12 AM
Asymmetric competition among stream fishes: Do food web pathways affect competitive outcomes? - George - 2024 - Ecosphere - Wiley Online Library esajournals.onlinelibrary.wiley.com/doi/full/10....
Please check out our paper! Share too! #invasivespecies #ecology #foodweb #conservation
Please check out our paper! Share too! #invasivespecies #ecology #foodweb #conservation
Reposted by Ryan Sponseller
New job! Please repost - Post doc @oxuniearthsci.bsky.social on The Security of #CarbonDioxide Drawdown During #EnhancedRockWeathering
Does downstream #carbonate formation happen? How? How much? How quick?
Apply by 12 June
my.corehr.com/pls/uoxrecru...
Does downstream #carbonate formation happen? How? How much? How quick?
Apply by 12 June
my.corehr.com/pls/uoxrecru...
Job Details
my.corehr.com
May 27, 2025 at 9:24 AM
New job! Please repost - Post doc @oxuniearthsci.bsky.social on The Security of #CarbonDioxide Drawdown During #EnhancedRockWeathering
Does downstream #carbonate formation happen? How? How much? How quick?
Apply by 12 June
my.corehr.com/pls/uoxrecru...
Does downstream #carbonate formation happen? How? How much? How quick?
Apply by 12 June
my.corehr.com/pls/uoxrecru...
Reposted by Ryan Sponseller
Global Soil Methane Uptake Estimated by Scaling Up Local Measurements: Jiang et al. in @globalchangebio.bsky.social onlinelibrary.wiley.com/doi/10.1111/...
Global Soil Methane Uptake Estimated by Scaling Up Local Measurements
We develop a data-driven approach to refine this global estimate by incorporating local data of 79,800 flux measurements from 198 sites, this novel approach links the global SMU budget to local SMU f....
onlinelibrary.wiley.com
April 25, 2025 at 9:48 AM
Global Soil Methane Uptake Estimated by Scaling Up Local Measurements: Jiang et al. in @globalchangebio.bsky.social onlinelibrary.wiley.com/doi/10.1111/...
Last week to apply!
We are hiring a postdoc at Umeå University in aquatic ecosystem ecology. See the link for details!
www.umu.se/en/work-with...
@grocherros.bsky.social
www.umu.se/en/work-with...
@grocherros.bsky.social
Postdoc (2 years) in aquatic ecosystem ecology
www.umu.se
April 8, 2025 at 9:24 AM
Last week to apply!
Reposted by Ryan Sponseller
Big CONGRATS to @kacizarek.bsky.social!!! Her new paper is out in @agu.org's JGR-B!
The paper has a little bit of everything -- N biogeochemistry, intermittent stream hydrology, concentration-connectivity relationships!
Check it out here: agupubs.onlinelibrary.wiley.com/doi/full/10....
The paper has a little bit of everything -- N biogeochemistry, intermittent stream hydrology, concentration-connectivity relationships!
Check it out here: agupubs.onlinelibrary.wiley.com/doi/full/10....
March 27, 2025 at 1:00 PM
Big CONGRATS to @kacizarek.bsky.social!!! Her new paper is out in @agu.org's JGR-B!
The paper has a little bit of everything -- N biogeochemistry, intermittent stream hydrology, concentration-connectivity relationships!
Check it out here: agupubs.onlinelibrary.wiley.com/doi/full/10....
The paper has a little bit of everything -- N biogeochemistry, intermittent stream hydrology, concentration-connectivity relationships!
Check it out here: agupubs.onlinelibrary.wiley.com/doi/full/10....
Reposted by Ryan Sponseller
Do you work on lakes globally? Check out what is, to my mind, the most complete global database of lakes (~6M) and associated attributes, newly published in WRR. Also the basis for SWOT lake data. agupubs.onlinelibrary.wiley.com/doi/full/10....
March 19, 2025 at 12:28 PM
Do you work on lakes globally? Check out what is, to my mind, the most complete global database of lakes (~6M) and associated attributes, newly published in WRR. Also the basis for SWOT lake data. agupubs.onlinelibrary.wiley.com/doi/full/10....
Reposted by Ryan Sponseller
🚨We are hiring🚨ECR with a PhD within 7 years? Tenure track position (akin to Assistant Prof) in Earth and Env Data Science at U of Gothenburg, Sweden. Expertise in remote sensing and machine learning. Work on climate change, Earth systems, biodiversity, #EO, #UAV Deadline May 10 tinyurl.com/58ft38du
Associate Senior Lecturer in Earth and Environmental Data Science
Associate Senior Lecturer in Earth and Environmental Data Science
At the Department of Earth Sciences, we
tinyurl.com
March 15, 2025 at 3:22 PM
🚨We are hiring🚨ECR with a PhD within 7 years? Tenure track position (akin to Assistant Prof) in Earth and Env Data Science at U of Gothenburg, Sweden. Expertise in remote sensing and machine learning. Work on climate change, Earth systems, biodiversity, #EO, #UAV Deadline May 10 tinyurl.com/58ft38du
Reposted by Ryan Sponseller
Work with me on getting depth-discrete profiles of water quality using high-frequency loggers and microCTD measurements! And then let’s be creative to infer mechanisms that could improve mechanistic modeling.
Join us at Aarhus University to research improved ways to simulate lake ecosystems using high-frequency data!
1.5 months left until the deadline to apply for this PhD position: phd.tech.au.dk/for-applican...
1.5 months left until the deadline to apply for this PhD position: phd.tech.au.dk/for-applican...
March 12, 2025 at 2:07 PM
Work with me on getting depth-discrete profiles of water quality using high-frequency loggers and microCTD measurements! And then let’s be creative to infer mechanisms that could improve mechanistic modeling.
We are hiring a postdoc at Umeå University in aquatic ecosystem ecology. See the link for details!
www.umu.se/en/work-with...
@grocherros.bsky.social
www.umu.se/en/work-with...
@grocherros.bsky.social
Postdoc (2 years) in aquatic ecosystem ecology
www.umu.se
March 5, 2025 at 10:21 AM
We are hiring a postdoc at Umeå University in aquatic ecosystem ecology. See the link for details!
www.umu.se/en/work-with...
@grocherros.bsky.social
www.umu.se/en/work-with...
@grocherros.bsky.social
Reposted by Ryan Sponseller
My @pnnl.bsky.social colleague James Stegen leads "Reviews and syntheses: Variable inundation across Earth's terrestrial ecosystems" bg.copernicus.org/articles/22/...
Reviews and syntheses: Variable inundation across Earth's terrestrial ecosystems
Abstract. The structure, function, and dynamics of Earth's terrestrial ecosystems are profoundly influenced by how often (frequency) and how long (duration) they are inundated with water. A diverse ar...
bg.copernicus.org
February 24, 2025 at 5:13 PM
My @pnnl.bsky.social colleague James Stegen leads "Reviews and syntheses: Variable inundation across Earth's terrestrial ecosystems" bg.copernicus.org/articles/22/...
Reposted by Ryan Sponseller
If plankton to plants
is catastrophic or not
time the great tester
In our group a highlight has been using long-term monitoring data to test ideas in ecology. Here we asked “does the theory of the alternative stable states in shallow lakes stand the test of time?” doi.org/10.1038/s414...
is catastrophic or not
time the great tester
In our group a highlight has been using long-term monitoring data to test ideas in ecology. Here we asked “does the theory of the alternative stable states in shallow lakes stand the test of time?” doi.org/10.1038/s414...
Bimodality and alternative equilibria do not help explain long-term patterns in shallow lake chlorophyll-a - Nature Communications
Shallow lakes have long been considered an example of alternative equilibria in ecological systems. Here, the authors combine empirical data and simulations to show that the relationship of shallow la...
doi.org
January 27, 2025 at 10:31 AM
If plankton to plants
is catastrophic or not
time the great tester
In our group a highlight has been using long-term monitoring data to test ideas in ecology. Here we asked “does the theory of the alternative stable states in shallow lakes stand the test of time?” doi.org/10.1038/s414...
is catastrophic or not
time the great tester
In our group a highlight has been using long-term monitoring data to test ideas in ecology. Here we asked “does the theory of the alternative stable states in shallow lakes stand the test of time?” doi.org/10.1038/s414...
Reposted by Ryan Sponseller
"Abrupt transformation of west Greenland lakes following compound climate extremes associated with atmospheric rivers". This new article in PNAS by Jasmine Saros and colleague Vendy Hazuková is pretty striking www.pnas.org/doi/full/10....
January 24, 2025 at 7:43 PM
"Abrupt transformation of west Greenland lakes following compound climate extremes associated with atmospheric rivers". This new article in PNAS by Jasmine Saros and colleague Vendy Hazuková is pretty striking www.pnas.org/doi/full/10....
Reposted by Ryan Sponseller
My first post on bsky to announce my first solo author paper is out in @aslo.org L&O Letters. doi.org/10.1002/lol2...
Thanks to lots of amazing conversations with collaborators and a call out on that other social media to gather info on lakes, rivers, streams, wetlands, etc with calcium carbonate.
Thanks to lots of amazing conversations with collaborators and a call out on that other social media to gather info on lakes, rivers, streams, wetlands, etc with calcium carbonate.
January 23, 2025 at 3:59 PM
My first post on bsky to announce my first solo author paper is out in @aslo.org L&O Letters. doi.org/10.1002/lol2...
Thanks to lots of amazing conversations with collaborators and a call out on that other social media to gather info on lakes, rivers, streams, wetlands, etc with calcium carbonate.
Thanks to lots of amazing conversations with collaborators and a call out on that other social media to gather info on lakes, rivers, streams, wetlands, etc with calcium carbonate.
Reposted by Ryan Sponseller
Does tree presence promote or hamper soil organic matter turnover? Well... both! Read about our exciting results from the treeline ecotone in Abisko, Sweden. #gadgil #priming #litterdecomposition onlinelibrary.wiley.com/doi/epdf/10....
Trees First Inhibit Then Promote Litter Decomposition in the Subarctic
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onlinelibrary.wiley.com
January 20, 2025 at 11:49 AM
Does tree presence promote or hamper soil organic matter turnover? Well... both! Read about our exciting results from the treeline ecotone in Abisko, Sweden. #gadgil #priming #litterdecomposition onlinelibrary.wiley.com/doi/epdf/10....
Reposted by Ryan Sponseller
As of January 1st, Stress Response Modeling at IceLab has officially welcomed @grocherros.bsky.social as a new Assistant professor! Read more about Gerard:
www.umu.se/en/feature/r...
#complexsystems #ecology #environmentalscience #climatechange #carbonflows
www.umu.se/en/feature/r...
#complexsystems #ecology #environmentalscience #climatechange #carbonflows
From land to sea with a focus on the climate
Gerard Rocher-Ros wants to understand the flow of carbon and nutrients to find solutions to climate change.
www.umu.se
January 13, 2025 at 10:41 AM
As of January 1st, Stress Response Modeling at IceLab has officially welcomed @grocherros.bsky.social as a new Assistant professor! Read more about Gerard:
www.umu.se/en/feature/r...
#complexsystems #ecology #environmentalscience #climatechange #carbonflows
www.umu.se/en/feature/r...
#complexsystems #ecology #environmentalscience #climatechange #carbonflows
Reposted by Ryan Sponseller
We often think of rivers as linear features, but lateral dynamics are just as important and often overlooked!
In our paper we present a framework for the study and management of rivers which emphasises lateral connectivity.
#floodplainconnectivity #riverrestoration
Link to paper shorturl.at/ri3lA
In our paper we present a framework for the study and management of rivers which emphasises lateral connectivity.
#floodplainconnectivity #riverrestoration
Link to paper shorturl.at/ri3lA
January 7, 2025 at 2:36 PM
We often think of rivers as linear features, but lateral dynamics are just as important and often overlooked!
In our paper we present a framework for the study and management of rivers which emphasises lateral connectivity.
#floodplainconnectivity #riverrestoration
Link to paper shorturl.at/ri3lA
In our paper we present a framework for the study and management of rivers which emphasises lateral connectivity.
#floodplainconnectivity #riverrestoration
Link to paper shorturl.at/ri3lA
Reposted by Ryan Sponseller
Check out our new paper in Ecology Letters! We examined how the N-fixing cyanobacteria Dolichospermum's ionome and physiology changed in response to short—and long-term adaptation to different N supplies. Take home: There is a lot more than Fe changing in diazotrophs.
doi.org/10.1111/ele....
doi.org/10.1111/ele....
Current and Historical Resource Nitrogen Supply Affects the Eco‐Physiological Traits and the Ionome of a Diazotrophic Cyanobacterium
Diazotrophic cyanobacteria can overcome nitrogen (N)-limitation by fixing atmospheric N2; however, this comes with increased energetic, iron, molybdenum, and boron costs. Here, we examined the change...
doi.org
December 31, 2024 at 7:04 PM
Check out our new paper in Ecology Letters! We examined how the N-fixing cyanobacteria Dolichospermum's ionome and physiology changed in response to short—and long-term adaptation to different N supplies. Take home: There is a lot more than Fe changing in diazotrophs.
doi.org/10.1111/ele....
doi.org/10.1111/ele....
Nice opportunity here!
PHD STUDENT WANTED! As part of the @kawresearch.bsky.social Wallenberg Initiative in Forest Research (WIFORCE), we are offering a fully funded, 4yr, #PhD position studying #riparian forest #biodiversity & #microclimate. Due date Jan 21st!
www.slu.se/en/about-slu...
www.slu.se/en/about-slu...
December 12, 2024 at 2:28 PM
Nice opportunity here!
Reposted by Ryan Sponseller
The sky above Umeå has been colorful lately (when it's not pitch black that is).
Everyone in IceLab has seen these.
Except the fish. 🐠
They're just doing their regular fishy things.
Everyone in IceLab has seen these.
Except the fish. 🐠
They're just doing their regular fishy things.
Yesterday's single #nacreous cloud was nice, sure, but this morning we had an explosion of them! Again, everyone in Umeå seemed to have something to say about them. We are all connected in our awe or rainbow clouds. #cloudappreciation #photography #LifeNearThePoles
December 11, 2024 at 3:08 PM
The sky above Umeå has been colorful lately (when it's not pitch black that is).
Everyone in IceLab has seen these.
Except the fish. 🐠
They're just doing their regular fishy things.
Everyone in IceLab has seen these.
Except the fish. 🐠
They're just doing their regular fishy things.
Reposted by Ryan Sponseller
I am soon recruiting two PhDs and a postdoc, to work on carbon, methane, metabolism in arctic stream networks. Glad to chat potential opportunities during #AGU24 @agu.org ! There is also soon another postdoc position on oxygen responses to peatland restoration with @ryansponseller.bsky.social ⬇️
December 8, 2024 at 8:48 PM
I am soon recruiting two PhDs and a postdoc, to work on carbon, methane, metabolism in arctic stream networks. Glad to chat potential opportunities during #AGU24 @agu.org ! There is also soon another postdoc position on oxygen responses to peatland restoration with @ryansponseller.bsky.social ⬇️
Reposted by Ryan Sponseller
New article by Rebecca Hale and others in Limnology and Oceanography: "Diel dissolved organic matter patterns reflect spatiotemporally varying sources and transformations along an intermittent stream" aslopubs.onlinelibrary.wiley.com/doi/full/10....
Diel dissolved organic matter patterns reflect spatiotemporally varying sources and transformations along an intermittent stream
Stream dissolved organic matter (DOM) is a globally important carbon flux and a locally important control on stream ecosystems, and therefore understanding controls on stream DOM fluxes and dynamics ...
aslopubs.onlinelibrary.wiley.com
November 27, 2024 at 5:57 PM
New article by Rebecca Hale and others in Limnology and Oceanography: "Diel dissolved organic matter patterns reflect spatiotemporally varying sources and transformations along an intermittent stream" aslopubs.onlinelibrary.wiley.com/doi/full/10....