Jeannie Wilkening
@jvwilkening.bsky.social
Ecohydrologist studying how water💧& plants 🌳 react to a changing climate | Lover of deserts 🌵 & desserts 🧁| Previously UC Berkeley, Cambridge, & U Arizona | she/her | Views my own
This is one of my favorite trees on campus!
May 14, 2025 at 8:52 PM
This is one of my favorite trees on campus!
Despite how things ended, I still learned so much from my time at EPA about how applied, interdisciplinary science can drive progress on complex problems like climate change. I look forward to taking these experiences into my next chapter, with more details on that soon! 7/7
May 6, 2025 at 10:02 PM
Despite how things ended, I still learned so much from my time at EPA about how applied, interdisciplinary science can drive progress on complex problems like climate change. I look forward to taking these experiences into my next chapter, with more details on that soon! 7/7
As many of these people might be on the job market soon given the destruction of the EPA’s Office of Research and Development, I cannot emphasize enough how much of an asset they would be to any team. 6/7
May 6, 2025 at 10:02 PM
As many of these people might be on the job market soon given the destruction of the EPA’s Office of Research and Development, I cannot emphasize enough how much of an asset they would be to any team. 6/7
They are a truly special group of brilliant and dedicated scientists, and even with the growing challenges we faced in our work over the past few months it amazed me how they always continued to show up with care and kindness for each other and those that we served. 5/7
May 6, 2025 at 10:02 PM
They are a truly special group of brilliant and dedicated scientists, and even with the growing challenges we faced in our work over the past few months it amazed me how they always continued to show up with care and kindness for each other and those that we served. 5/7
Nevertheless, I’m so grateful to the incredible colleagues I got to work with in the Integrated Climate Sciences Division at EPA and am so proud of the things we were able to accomplish. 4/7
May 6, 2025 at 10:02 PM
Nevertheless, I’m so grateful to the incredible colleagues I got to work with in the Integrated Climate Sciences Division at EPA and am so proud of the things we were able to accomplish. 4/7
On a broader level, I’m deeply concerned about the larger trend of dismantling scientific research at EPA, especially after having spent the last several months getting to see firsthand how this vital work supports safer, cleaner, and more resilient communities. 3/7
May 6, 2025 at 10:02 PM
On a broader level, I’m deeply concerned about the larger trend of dismantling scientific research at EPA, especially after having spent the last several months getting to see firsthand how this vital work supports safer, cleaner, and more resilient communities. 3/7
On a personal level, I’m heartbroken. I had come to DC in the hopes that I could use my years of scientific training to serve the public. 2/7
May 6, 2025 at 10:02 PM
On a personal level, I’m heartbroken. I had come to DC in the hopes that I could use my years of scientific training to serve the public. 2/7
Took your tip and checked out the Smithsonian Castle magnolias yesterday for my afternoon “desperately in need of some sunlight and fresh air” walk. Truly delightful!
March 26, 2025 at 6:02 PM
Took your tip and checked out the Smithsonian Castle magnolias yesterday for my afternoon “desperately in need of some sunlight and fresh air” walk. Truly delightful!
Full paper is available open access here: doi.org/10.1029/2024...
Canopy Temperature Reveals Disparities in Urban Tree Benefits
Using canopy temperature as a proxy, we show that urban tree health and function varies across Minneapolis-St. Paul, MN Trees in more urbanized areas and areas further from blue/green spaces exhi...
doi.org
February 18, 2025 at 2:50 PM
Full paper is available open access here: doi.org/10.1029/2024...
Must also shout out everyone who made this possible, especially @drsallyet.bsky.social & Todd Dawson. This was a beast of a dissertation chapter that took up a lot of my mental, physical, and emotional energy in grad school. And we pulled it off even though a global pandemic got in the way 🫠
January 24, 2025 at 4:28 PM
Must also shout out everyone who made this possible, especially @drsallyet.bsky.social & Todd Dawson. This was a beast of a dissertation chapter that took up a lot of my mental, physical, and emotional energy in grad school. And we pulled it off even though a global pandemic got in the way 🫠
And also just want to highlight that we made all the data from this paper available at the following link, and invite y'all to throw it into your favorite ecohydrological model to test it out: doi.org/10.5281/zeno...
Drydown and Recovery Experimental Data for Populus trichocarpa
This repository contains data collected during a drydown and recovery experiment, which is described in the manuscript "Mind the data gap: Using a multi-measurement synthesis for identifying the chall...
doi.org
January 24, 2025 at 4:28 PM
And also just want to highlight that we made all the data from this paper available at the following link, and invite y'all to throw it into your favorite ecohydrological model to test it out: doi.org/10.5281/zeno...
TLDR: Collecting more simultaneous measurements of different parts of this high dimensional system during drought response and recovery is really valuable for identifying drivers and mechanisms, but there are also ways we can be strategic about it in terms of what measurements we take when.
January 24, 2025 at 4:28 PM
TLDR: Collecting more simultaneous measurements of different parts of this high dimensional system during drought response and recovery is really valuable for identifying drivers and mechanisms, but there are also ways we can be strategic about it in terms of what measurements we take when.
From that we saw a couple different things: 1) environmental variables are generally valuable as constraints & important things to measure, & 2) dynamics after (vs during) drought are generally harder to constrain, so targeting more intensive data collection after drought could be strategic
January 24, 2025 at 4:28 PM
From that we saw a couple different things: 1) environmental variables are generally valuable as constraints & important things to measure, & 2) dynamics after (vs during) drought are generally harder to constrain, so targeting more intensive data collection after drought could be strategic
Beyond just trying to understand what happened in this experiment, we also wanted to think about how we might better approach data collection during and after drought. To do this, we used metrics from information theory to characterize the “value” of msmnts as constraints fluxes and water status.
January 24, 2025 at 4:28 PM
Beyond just trying to understand what happened in this experiment, we also wanted to think about how we might better approach data collection during and after drought. To do this, we used metrics from information theory to characterize the “value” of msmnts as constraints fluxes and water status.
Through piecing together different types of data that we collected, we hypothesize that this was likely due to a hormonal drought response, where effects can persist even after soil moisture is replenished via stomatal closure and changes in morphology (e.g., leaf area)
January 24, 2025 at 4:28 PM
Through piecing together different types of data that we collected, we hypothesize that this was likely due to a hormonal drought response, where effects can persist even after soil moisture is replenished via stomatal closure and changes in morphology (e.g., leaf area)
We saw that despite not pushing the trees to a point embolism, they showed a delayed & only partial recovery of water fluxes. We also saw a decoupling between sap flow and leaf water potentials after the trees were rewatered, and there was significant yellowing and leaf drop even after rewatering.
January 24, 2025 at 4:28 PM
We saw that despite not pushing the trees to a point embolism, they showed a delayed & only partial recovery of water fluxes. We also saw a decoupling between sap flow and leaf water potentials after the trees were rewatered, and there was significant yellowing and leaf drop even after rewatering.
This is a bit of what this looked like behind the scenes for a couple weeks in Summer 2021. Safe to say I was a very tired PhD student.
January 24, 2025 at 4:28 PM
This is a bit of what this looked like behind the scenes for a couple weeks in Summer 2021. Safe to say I was a very tired PhD student.
And I mean a LOT of measurements. In addition to installed sensors for sap flux and met, I tallied:
90 soil moisture, 196 leaf water potential, 540 isotope,
122 leaf area, 78 gas exchange, 21 root mass, 2 soil H2O retention curves, 6 vulnerability curves, 3 A/Ci curves & 5 light response curves
90 soil moisture, 196 leaf water potential, 540 isotope,
122 leaf area, 78 gas exchange, 21 root mass, 2 soil H2O retention curves, 6 vulnerability curves, 3 A/Ci curves & 5 light response curves
January 24, 2025 at 4:28 PM
And I mean a LOT of measurements. In addition to installed sensors for sap flux and met, I tallied:
90 soil moisture, 196 leaf water potential, 540 isotope,
122 leaf area, 78 gas exchange, 21 root mass, 2 soil H2O retention curves, 6 vulnerability curves, 3 A/Ci curves & 5 light response curves
90 soil moisture, 196 leaf water potential, 540 isotope,
122 leaf area, 78 gas exchange, 21 root mass, 2 soil H2O retention curves, 6 vulnerability curves, 3 A/Ci curves & 5 light response curves
In our experiment, we subjected trees to a drydown followed by a recovery period and were interested in exploring what we can do when we have a lot of data about these dynamics. So we took measurements to characterize water fluxes, water status, physiological traits, & environmental conditions.
January 24, 2025 at 4:28 PM
In our experiment, we subjected trees to a drydown followed by a recovery period and were interested in exploring what we can do when we have a lot of data about these dynamics. So we took measurements to characterize water fluxes, water status, physiological traits, & environmental conditions.