Hannah Dion-Kirschner
@hdkgeo.bsky.social
Terrestrial carbon cycle researcher invested in educational equity & Earth’s future 🌏 Postdocing at UChicago Ecology & Evolution
I’m looking for a pop science book that follows scientific efforts to measure and/or model the global carbon cycle—would happily accept any recommendations! 🌏 #geoscience
November 13, 2025 at 10:33 PM
I’m looking for a pop science book that follows scientific efforts to measure and/or model the global carbon cycle—would happily accept any recommendations! 🌏 #geoscience
Reposted by Hannah Dion-Kirschner
This is an Eastern Cape giant cycad. This specimen at Kew Gardens is the world's oldest potted plant* & it is older than the United States.
I found this oddly comforting? Certain systems seem deeply entrenched & unchangeable but in reality there are houseplants that have been around longer.🧪🌿
I found this oddly comforting? Certain systems seem deeply entrenched & unchangeable but in reality there are houseplants that have been around longer.🧪🌿
November 13, 2025 at 7:47 PM
This is an Eastern Cape giant cycad. This specimen at Kew Gardens is the world's oldest potted plant* & it is older than the United States.
I found this oddly comforting? Certain systems seem deeply entrenched & unchangeable but in reality there are houseplants that have been around longer.🧪🌿
I found this oddly comforting? Certain systems seem deeply entrenched & unchangeable but in reality there are houseplants that have been around longer.🧪🌿
Reposted by Hannah Dion-Kirschner
This is great news: www.theguardian.com/world/2025/n.... Not least because it removes one of the common denialist retorts “what’s the point if China aren’t doing it” - they clearly are and so should we
China’s CO2 emissions have been flat or falling for past 18 months, analysis finds
World’s biggest polluter on track to hit peak emissions target early but miss goal for cutting carbon intensity
www.theguardian.com
November 11, 2025 at 7:00 AM
This is great news: www.theguardian.com/world/2025/n.... Not least because it removes one of the common denialist retorts “what’s the point if China aren’t doing it” - they clearly are and so should we
Reposted by Hannah Dion-Kirschner
🚨 Job alert 🚨
Come work with us as a postdoc modelling the impacts of climate change on plant-soil interactions and C sequestration!
Apply here before the 3rd of December: werkenbij.uva.nl/en/vacancies...
Check out this video of the project you will be working in: vimeo.com/1133112953?s...
Come work with us as a postdoc modelling the impacts of climate change on plant-soil interactions and C sequestration!
Apply here before the 3rd of December: werkenbij.uva.nl/en/vacancies...
Check out this video of the project you will be working in: vimeo.com/1133112953?s...
KligrasV5_ENG
This is "KligrasV5_ENG" by Nyah Yentl van Koningsveld on Vimeo, the home for high quality videos and the people who love them.
vimeo.com
November 11, 2025 at 2:55 PM
🚨 Job alert 🚨
Come work with us as a postdoc modelling the impacts of climate change on plant-soil interactions and C sequestration!
Apply here before the 3rd of December: werkenbij.uva.nl/en/vacancies...
Check out this video of the project you will be working in: vimeo.com/1133112953?s...
Come work with us as a postdoc modelling the impacts of climate change on plant-soil interactions and C sequestration!
Apply here before the 3rd of December: werkenbij.uva.nl/en/vacancies...
Check out this video of the project you will be working in: vimeo.com/1133112953?s...
I love hearing scientists’ origin stories because they highlight how the interests that draw us to science are as diverse as we are 🌱
For me it was:
1. A 5th grade teacher who taught a lesson on climate change, my first time learning about Earth’s climate system
For me it was:
1. A 5th grade teacher who taught a lesson on climate change, my first time learning about Earth’s climate system
For #EarthScienceWeek2025: what 3 steps got you into ⚒️🧪 Earth Science?
1. A wood box full of rocks and crystals that my Dad had collected in his travels
2. David Attenbourgh's 'Life on Earth'
3. Couldn't make up my mind choosing a science major, so I did the (earth) science that does them all!
1. A wood box full of rocks and crystals that my Dad had collected in his travels
2. David Attenbourgh's 'Life on Earth'
3. Couldn't make up my mind choosing a science major, so I did the (earth) science that does them all!
October 14, 2025 at 3:37 PM
I love hearing scientists’ origin stories because they highlight how the interests that draw us to science are as diverse as we are 🌱
For me it was:
1. A 5th grade teacher who taught a lesson on climate change, my first time learning about Earth’s climate system
For me it was:
1. A 5th grade teacher who taught a lesson on climate change, my first time learning about Earth’s climate system
Reposted by Hannah Dion-Kirschner
NASA is making plans to shut down two Earth observing satellites that provide key data to climate scientists and farmers, despite lawmakers telling them it’s illegal to do it. Story by @astrokimcartier.bsky.social
eos.org/research-and...
eos.org/research-and...
NASA Planning for Unauthorized Shutdown of Carbon Monitoring Satellites - Eos
Despite warnings that their actions are illegal, Duffy and other senior NASA officials have continued to secretly direct NASA employees to draw up plans to end at least two major satellites missions s...
eos.org
August 5, 2025 at 6:40 PM
NASA is making plans to shut down two Earth observing satellites that provide key data to climate scientists and farmers, despite lawmakers telling them it’s illegal to do it. Story by @astrokimcartier.bsky.social
eos.org/research-and...
eos.org/research-and...
Reposted by Hannah Dion-Kirschner
New paper in @nature.com! With @kiseokmicro.bsky.social , Siqi Liu, Kyle Crocker, Jojo Wang, Mikhail Tikhonov & Madhav Mani — a massive dataset and simple model reveal a few conserved regimes that capture how soil microbiome metabolism responds to perturbations. www.nature.com/articles/s41...
July 17, 2025 at 6:36 AM
New paper in @nature.com! With @kiseokmicro.bsky.social , Siqi Liu, Kyle Crocker, Jojo Wang, Mikhail Tikhonov & Madhav Mani — a massive dataset and simple model reveal a few conserved regimes that capture how soil microbiome metabolism responds to perturbations. www.nature.com/articles/s41...
Reposted by Hannah Dion-Kirschner
Hope this is useful - consensus statement "Guidelines for preventing and reporting contamination in low-biomass microbiome studies" rdcu.be/er3Io
Guidelines for preventing and reporting contamination in low-biomass microbiome studies
Nature Microbiology - In this Consensus Statement, the authors outline strategies for processing, analysing and interpreting low-biomass microbiome samples, and provide recommendations to minimize...
rdcu.be
June 21, 2025 at 7:59 PM
Hope this is useful - consensus statement "Guidelines for preventing and reporting contamination in low-biomass microbiome studies" rdcu.be/er3Io
Reposted by Hannah Dion-Kirschner
It's been hard for early career biologists looking for postdocs, so I created a Google Sheet where we can all compile fellowships/job boards/postdoc opportunities in one place. PLEASE SHARE WIDELY! If you're a PI looking for postdocs, you can add to the 4th tab! docs.google.com/spreadsheets...
Postdoc Opportunity Megathread
docs.google.com
June 18, 2025 at 5:44 PM
It's been hard for early career biologists looking for postdocs, so I created a Google Sheet where we can all compile fellowships/job boards/postdoc opportunities in one place. PLEASE SHARE WIDELY! If you're a PI looking for postdocs, you can add to the 4th tab! docs.google.com/spreadsheets...
Reposted by Hannah Dion-Kirschner
⚖️ HUGE day today in the NIH terminations cases
There's a trial (of sorts) at 10a ET in Boston today for arguments that NIH unlawfully terminated 100s of grants.
It's a 3 hour hearing and I'll post periodic updates.
Of note: this is the 1st lawsuit filed against the Trump Admin to go to trial.
There's a trial (of sorts) at 10a ET in Boston today for arguments that NIH unlawfully terminated 100s of grants.
It's a 3 hour hearing and I'll post periodic updates.
Of note: this is the 1st lawsuit filed against the Trump Admin to go to trial.
June 16, 2025 at 2:00 PM
⚖️ HUGE day today in the NIH terminations cases
There's a trial (of sorts) at 10a ET in Boston today for arguments that NIH unlawfully terminated 100s of grants.
It's a 3 hour hearing and I'll post periodic updates.
Of note: this is the 1st lawsuit filed against the Trump Admin to go to trial.
There's a trial (of sorts) at 10a ET in Boston today for arguments that NIH unlawfully terminated 100s of grants.
It's a 3 hour hearing and I'll post periodic updates.
Of note: this is the 1st lawsuit filed against the Trump Admin to go to trial.
Reposted by Hannah Dion-Kirschner
Climate.gov, a major US government website supporting public education on climate science, will likely shut down after almost all of its staff were fired. What would be worse is if the website were co-opted to publish climate denial content.
Major US climate website likely to be shut down after almost all staff fired
Exclusive: Climate.gov, which supports public education on climate science, will soon no longer publish new content
www.theguardian.com
June 11, 2025 at 11:21 AM
Climate.gov, a major US government website supporting public education on climate science, will likely shut down after almost all of its staff were fired. What would be worse is if the website were co-opted to publish climate denial content.
Reposted by Hannah Dion-Kirschner
Our paper on the cultivation of a putative sulfur comproportionator from the Frasassi caves is finally out! Jan would have been happy to see this paper published - it's got everything that he loved: thermodynamics, cultivation, weird metabolisms, and life underground. Cheers to Jan!
rdcu.be/enlo3
rdcu.be/enlo3
Isolation of a putative sulfur comproportionating microorganism
Scientific Reports - Isolation of a putative sulfur comproportionating microorganism
rdcu.be
May 23, 2025 at 4:46 PM
Our paper on the cultivation of a putative sulfur comproportionator from the Frasassi caves is finally out! Jan would have been happy to see this paper published - it's got everything that he loved: thermodynamics, cultivation, weird metabolisms, and life underground. Cheers to Jan!
rdcu.be/enlo3
rdcu.be/enlo3
Reposted by Hannah Dion-Kirschner
🚨 A new rule would let career scientists like NSF/NIH program officers be replaced by political appointees
Already 14,000+ public comments, deadline is Friday
📣 Comments can be short. Courts consider them—and scientists with NSF/NIH experience are especially impactful
Speak up! shorturl.at/WKuBj
Already 14,000+ public comments, deadline is Friday
📣 Comments can be short. Courts consider them—and scientists with NSF/NIH experience are especially impactful
Speak up! shorturl.at/WKuBj
May 21, 2025 at 5:39 PM
🚨 A new rule would let career scientists like NSF/NIH program officers be replaced by political appointees
Already 14,000+ public comments, deadline is Friday
📣 Comments can be short. Courts consider them—and scientists with NSF/NIH experience are especially impactful
Speak up! shorturl.at/WKuBj
Already 14,000+ public comments, deadline is Friday
📣 Comments can be short. Courts consider them—and scientists with NSF/NIH experience are especially impactful
Speak up! shorturl.at/WKuBj
Reposted by Hannah Dion-Kirschner
NSF Physics was cut by 85%, basically wiping out most of its capacity for supporting research.
NSF Astronomy was cut by 53%
Undergrad education was cut by 71% and research on learning by 79%
Graduate education was cut by 100% to ZERO.
#GiftLink ⚛️🔭
www.nytimes.com/interactive/...
NSF Astronomy was cut by 53%
Undergrad education was cut by 71% and research on learning by 79%
Graduate education was cut by 100% to ZERO.
#GiftLink ⚛️🔭
www.nytimes.com/interactive/...
Trump Has Cut Science Funding to Its Lowest Level in Decades (Gift Article)
The lag in funding extends far beyond D.E.I. initiatives, affecting almost every area of science: chemistry, computing, engineering, materials and more.
www.nytimes.com
May 22, 2025 at 3:34 PM
NSF Physics was cut by 85%, basically wiping out most of its capacity for supporting research.
NSF Astronomy was cut by 53%
Undergrad education was cut by 71% and research on learning by 79%
Graduate education was cut by 100% to ZERO.
#GiftLink ⚛️🔭
www.nytimes.com/interactive/...
NSF Astronomy was cut by 53%
Undergrad education was cut by 71% and research on learning by 79%
Graduate education was cut by 100% to ZERO.
#GiftLink ⚛️🔭
www.nytimes.com/interactive/...
Reposted by Hannah Dion-Kirschner
Altadena community calls on Gov. Newsom, California legislature to protect them from predatory developers.
A new report shows that more than half of Altadena land sales since February have gone to corporations.
lapublicpress.org/2025/05/alta...
A new report shows that more than half of Altadena land sales since February have gone to corporations.
lapublicpress.org/2025/05/alta...
Altadena community calls on Gov. Newsom, California legislature to protect them from predatory developers
A new report shows that more than half of Altadena land sales since February have gone to corporations.
lapublicpress.org
May 21, 2025 at 11:37 PM
Altadena community calls on Gov. Newsom, California legislature to protect them from predatory developers.
A new report shows that more than half of Altadena land sales since February have gone to corporations.
lapublicpress.org/2025/05/alta...
A new report shows that more than half of Altadena land sales since February have gone to corporations.
lapublicpress.org/2025/05/alta...
Reposted by Hannah Dion-Kirschner
Microbial communities can harbor many species that do not coexist in pairs, yet can coexist in the full community. Here we provide the mathematical foundations of emergent coexistence, and explain why it can't be predicted from pairwise tests www.biorxiv.org/content/10.1...
May 20, 2025 at 1:16 PM
Microbial communities can harbor many species that do not coexist in pairs, yet can coexist in the full community. Here we provide the mathematical foundations of emergent coexistence, and explain why it can't be predicted from pairwise tests www.biorxiv.org/content/10.1...
Reposted by Hannah Dion-Kirschner
My ongoing request:
If your NSF or NIH grant was terminated--whether at Harvard or elsewhere--please report it here.
NSF: grant-watch.us/submit-nsf.h...
NIH: grant-watch.us/submit-nih.h...
Our trackers are actively used in lawsuits and are often the only record that terminations ever occurred.
If your NSF or NIH grant was terminated--whether at Harvard or elsewhere--please report it here.
NSF: grant-watch.us/submit-nsf.h...
NIH: grant-watch.us/submit-nih.h...
Our trackers are actively used in lawsuits and are often the only record that terminations ever occurred.
NSF appears to be terminating hundreds of its grants to Harvard, per internal sources at NSF and at Harvard. At least one division has had all its grants cut.
May 14, 2025 at 2:22 PM
My ongoing request:
If your NSF or NIH grant was terminated--whether at Harvard or elsewhere--please report it here.
NSF: grant-watch.us/submit-nsf.h...
NIH: grant-watch.us/submit-nih.h...
Our trackers are actively used in lawsuits and are often the only record that terminations ever occurred.
If your NSF or NIH grant was terminated--whether at Harvard or elsewhere--please report it here.
NSF: grant-watch.us/submit-nsf.h...
NIH: grant-watch.us/submit-nih.h...
Our trackers are actively used in lawsuits and are often the only record that terminations ever occurred.
Reposted by Hannah Dion-Kirschner
Reposted by Hannah Dion-Kirschner
The American public is broadly supportive of maintaining federal science and medical research funding, and against punishing universities by taking their funding away, according to a new poll:
Few support punitive funding cuts to colleges and universities - AP-NORC
Most of the public believes that colleges and universities make significant contributions to scientific and technological advancement and think their federal research funding should be maintained.
apnorc.org
May 14, 2025 at 8:14 PM
The American public is broadly supportive of maintaining federal science and medical research funding, and against punishing universities by taking their funding away, according to a new poll:
Reposted by Hannah Dion-Kirschner
Excited about our new paper asking: Why does the growth of most life have an optimal temperature below 40°C? We argue the average maximum oceanic temperatures of <37°C for 2+ billion years drove evolution of the temperature optima of prokaryotes. 1/5
onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com/doi/10.1002/...
Earth's Climate History Explains Life's Temperature Optima
We propose that the origin of the temperature optima of life results from two discrete evolutionary selection pressures that constrained the evolution of fundamental biochemistry and growth of most l...
onlinelibrary.wiley.com
February 23, 2025 at 8:58 PM
Reposted by Hannah Dion-Kirschner
Are you enthusiastic about #waterstableisotopes in forest trees? 🌲🌳💧
We offer a PhD position on ecohydrological feedbacks in forests under recurrent drought.
Join our team in Freiburg:
uni-freiburg.de/stellenangeb...
@chriswernerlab.bsky.social
@uni-freiburg.de @hydrofreiburg.bsky.social
We offer a PhD position on ecohydrological feedbacks in forests under recurrent drought.
Join our team in Freiburg:
uni-freiburg.de/stellenangeb...
@chriswernerlab.bsky.social
@uni-freiburg.de @hydrofreiburg.bsky.social
February 21, 2025 at 1:18 PM
Are you enthusiastic about #waterstableisotopes in forest trees? 🌲🌳💧
We offer a PhD position on ecohydrological feedbacks in forests under recurrent drought.
Join our team in Freiburg:
uni-freiburg.de/stellenangeb...
@chriswernerlab.bsky.social
@uni-freiburg.de @hydrofreiburg.bsky.social
We offer a PhD position on ecohydrological feedbacks in forests under recurrent drought.
Join our team in Freiburg:
uni-freiburg.de/stellenangeb...
@chriswernerlab.bsky.social
@uni-freiburg.de @hydrofreiburg.bsky.social
Reposted by Hannah Dion-Kirschner
Timelapse video shows a debris basin filling up fast in the Bailey Canyon area of Sierra Madre in the Eaton Fire burn area. The video is taken over the span of one hour.
That basin doing what it was designed for - keeping that mud and debris from going any further.
https://abc7.la/4gDtQ7L
That basin doing what it was designed for - keeping that mud and debris from going any further.
https://abc7.la/4gDtQ7L
February 14, 2025 at 2:51 AM
Timelapse video shows a debris basin filling up fast in the Bailey Canyon area of Sierra Madre in the Eaton Fire burn area. The video is taken over the span of one hour.
That basin doing what it was designed for - keeping that mud and debris from going any further.
https://abc7.la/4gDtQ7L
That basin doing what it was designed for - keeping that mud and debris from going any further.
https://abc7.la/4gDtQ7L
I used to regularly access this NOAA page on atmospheric GHG concentrations, so glad to know it’s still available from UCSD ⚒️🌏🧪
Although NOAA's page on atmospheric CO2 levels has vanished, you can still get this vital information from Ralph Keeling's team at the Scripps Institution of Oceanography, UC San Diego keelingcurve.ucsd.edu
Please follow bsky.app/profile/keel... for updates and share
Don't let science be hidden
Please follow bsky.app/profile/keel... for updates and share
Don't let science be hidden
February 6, 2025 at 11:14 PM
I used to regularly access this NOAA page on atmospheric GHG concentrations, so glad to know it’s still available from UCSD ⚒️🌏🧪
Is Photosynthesis-Derived NADPH Really a Source of 2H-Depleted Hydrogen in Plant Compounds? onlinelibrary.wiley.com/doi/10.1111/...
Is Photosynthesis‐Derived NADPH Really a Source of 2H‐Depleted Hydrogen in Plant Compounds?
We provide evidence that photosynthetically produced NADPH is not the major source of 2H-depletion in carbohydrates.
onlinelibrary.wiley.com
February 6, 2025 at 10:55 PM
Is Photosynthesis-Derived NADPH Really a Source of 2H-Depleted Hydrogen in Plant Compounds? onlinelibrary.wiley.com/doi/10.1111/...
Reposted by Hannah Dion-Kirschner
How does light structure microbial mats?
To explore this, we studied #Cyanobacteria and Chloroflexota from hot springs. Using simple synthetic communities, we found that these species cooperate, forming stronger #biofilms and moving further together. Paper now in PNAS: pnas.org/doi/10.1073/...
To explore this, we studied #Cyanobacteria and Chloroflexota from hot springs. Using simple synthetic communities, we found that these species cooperate, forming stronger #biofilms and moving further together. Paper now in PNAS: pnas.org/doi/10.1073/...
January 31, 2025 at 4:50 PM
How does light structure microbial mats?
To explore this, we studied #Cyanobacteria and Chloroflexota from hot springs. Using simple synthetic communities, we found that these species cooperate, forming stronger #biofilms and moving further together. Paper now in PNAS: pnas.org/doi/10.1073/...
To explore this, we studied #Cyanobacteria and Chloroflexota from hot springs. Using simple synthetic communities, we found that these species cooperate, forming stronger #biofilms and moving further together. Paper now in PNAS: pnas.org/doi/10.1073/...