Juan C. Mejía-Medina
@juan-camilo-mejia.bsky.social
🇨🇴 Biologist | plant science | ecophysiology | thermal thresholds | statistics | climate change.
Currently at Alliance Bioversity & CIAT, Colombia, researching low methane forages emissions (Data analysis).
~Restore our souls to restore our planet.
Currently at Alliance Bioversity & CIAT, Colombia, researching low methane forages emissions (Data analysis).
~Restore our souls to restore our planet.
Reposted by Juan C. Mejía-Medina
Environmental conditions drive variation in C4 photosynthetic capacity more than species traits
Fan, et al.
📖 nph.onlinelibrary.wiley.com/doi/10.1111/...
#PlantScience @yuzhenfan.bsky.social
Fan, et al.
📖 nph.onlinelibrary.wiley.com/doi/10.1111/...
#PlantScience @yuzhenfan.bsky.social
September 8, 2025 at 4:19 AM
Environmental conditions drive variation in C4 photosynthetic capacity more than species traits
Fan, et al.
📖 nph.onlinelibrary.wiley.com/doi/10.1111/...
#PlantScience @yuzhenfan.bsky.social
Fan, et al.
📖 nph.onlinelibrary.wiley.com/doi/10.1111/...
#PlantScience @yuzhenfan.bsky.social
Reposted by Juan C. Mejía-Medina
Carbon dioxide (CO₂) averaged about 425 ppm in August 2025
10 years ago August averaged about 399 ppm
Data available at gml.noaa.gov/ccgg/trends/
10 years ago August averaged about 399 ppm
Data available at gml.noaa.gov/ccgg/trends/
September 6, 2025 at 10:58 PM
Carbon dioxide (CO₂) averaged about 425 ppm in August 2025
10 years ago August averaged about 399 ppm
Data available at gml.noaa.gov/ccgg/trends/
10 years ago August averaged about 399 ppm
Data available at gml.noaa.gov/ccgg/trends/
Reposted by Juan C. Mejía-Medina
Fully funded PhD in #Ecophysiology at UBC in Vancouver! 🍁 Possible topics include leaf physiology, thermal ecology, microclimates, scaling, tree physiology, forest ecology, and more. Start Sept 2026/Jan 2027. michaletzlab.org
Please share!
#PlantEcoPhys #Ecology #Botany #PhDposition #GradSchool
Please share!
#PlantEcoPhys #Ecology #Botany #PhDposition #GradSchool
September 2, 2025 at 4:36 PM
Fully funded PhD in #Ecophysiology at UBC in Vancouver! 🍁 Possible topics include leaf physiology, thermal ecology, microclimates, scaling, tree physiology, forest ecology, and more. Start Sept 2026/Jan 2027. michaletzlab.org
Please share!
#PlantEcoPhys #Ecology #Botany #PhDposition #GradSchool
Please share!
#PlantEcoPhys #Ecology #Botany #PhDposition #GradSchool
Reposted by Juan C. Mejía-Medina
What drives photosynthesis temperature sensitivity? New #GCB paper from #MichaletzLab grad #JosefGaren uses #FAsTeR to show it's 1‑day weather, not traits, origin climate, or phylogeny!
www.researchgate.net/publication/...
@ubcbiodiversity.bsky.social @science.ubc.ca @globalchangebio.bsky.social
www.researchgate.net/publication/...
@ubcbiodiversity.bsky.social @science.ubc.ca @globalchangebio.bsky.social
September 2, 2025 at 7:13 PM
What drives photosynthesis temperature sensitivity? New #GCB paper from #MichaletzLab grad #JosefGaren uses #FAsTeR to show it's 1‑day weather, not traits, origin climate, or phylogeny!
www.researchgate.net/publication/...
@ubcbiodiversity.bsky.social @science.ubc.ca @globalchangebio.bsky.social
www.researchgate.net/publication/...
@ubcbiodiversity.bsky.social @science.ubc.ca @globalchangebio.bsky.social
Reposted by Juan C. Mejía-Medina
🚨Big news🚨
A Pocket Guide to Scientific Writing and Publishing is out🎉
This is the book I wish I’d had 20 years ago — short, practical, and designed to help researchers write & get their papers published
I hope it helps many
Please share with anyone who might benefit!
👉 mybook.to/ScienceGuide
A Pocket Guide to Scientific Writing and Publishing is out🎉
This is the book I wish I’d had 20 years ago — short, practical, and designed to help researchers write & get their papers published
I hope it helps many
Please share with anyone who might benefit!
👉 mybook.to/ScienceGuide
August 12, 2025 at 2:34 PM
🚨Big news🚨
A Pocket Guide to Scientific Writing and Publishing is out🎉
This is the book I wish I’d had 20 years ago — short, practical, and designed to help researchers write & get their papers published
I hope it helps many
Please share with anyone who might benefit!
👉 mybook.to/ScienceGuide
A Pocket Guide to Scientific Writing and Publishing is out🎉
This is the book I wish I’d had 20 years ago — short, practical, and designed to help researchers write & get their papers published
I hope it helps many
Please share with anyone who might benefit!
👉 mybook.to/ScienceGuide
Reposted by Juan C. Mejía-Medina
Slow-growing trees in arid environments live longer 🧪🌱
Climate-driven patterns of global tree longevity - Communications Earth & Environment
Trees in harsh environments exhibit higher longevity globally, particularly arid-adaptive gymnosperms whose extended longevity is linked to slow growth rates and high drought resilience, as revealed b...
www.nature.com
August 4, 2025 at 12:55 AM
Slow-growing trees in arid environments live longer 🧪🌱
Reposted by Juan C. Mejía-Medina
My paper on the mystery of the vanishing methane at Mayberry wetland is out! doi.org/10.1016/j.ag.... Many thanks to all the people who made this paper possible by gathering one of the longest continuous records of CH4 eddy covariance data in the world (14 yrs and counting!) @biometlab.bsky.social
Redirecting
doi.org
July 18, 2025 at 4:10 PM
My paper on the mystery of the vanishing methane at Mayberry wetland is out! doi.org/10.1016/j.ag.... Many thanks to all the people who made this paper possible by gathering one of the longest continuous records of CH4 eddy covariance data in the world (14 yrs and counting!) @biometlab.bsky.social
Reposted by Juan C. Mejía-Medina
Happy to be part of this effort led by CrisRuedas and the caminos network, which has just been published today. In it we review what has been done on pollination research in the tropical Andes and propose new lines of research. Pollination onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
July 16, 2025 at 12:03 PM
Happy to be part of this effort led by CrisRuedas and the caminos network, which has just been published today. In it we review what has been done on pollination research in the tropical Andes and propose new lines of research. Pollination onlinelibrary.wiley.com/doi/10.1111/...
Reposted by Juan C. Mejía-Medina
New #ECOSENSE paper out! doi.org/10.1002/eco....
Congrats to Stefanie Dumberger and @simonhaber.bsky.social for their first first-author respectively senior-author paper 👏
Check out their research on species-specific drought tolerance linked to the xylem profile 🧪🌲🌡️
#ClimateChange #Forest #DFG
Congrats to Stefanie Dumberger and @simonhaber.bsky.social for their first first-author respectively senior-author paper 👏
Check out their research on species-specific drought tolerance linked to the xylem profile 🧪🌲🌡️
#ClimateChange #Forest #DFG
Dynamic Shifts in Radial Sap Flow of Two Temperate Tree Species in Response to the Dry Summer 2022
Species-specific regulation of water fluxes and storage in the xylem are important drivers of drought tolerance. However, differences may occur along the radial profile of the xylem, potentially modi...
doi.org
July 7, 2025 at 2:26 PM
New #ECOSENSE paper out! doi.org/10.1002/eco....
Congrats to Stefanie Dumberger and @simonhaber.bsky.social for their first first-author respectively senior-author paper 👏
Check out their research on species-specific drought tolerance linked to the xylem profile 🧪🌲🌡️
#ClimateChange #Forest #DFG
Congrats to Stefanie Dumberger and @simonhaber.bsky.social for their first first-author respectively senior-author paper 👏
Check out their research on species-specific drought tolerance linked to the xylem profile 🧪🌲🌡️
#ClimateChange #Forest #DFG
Reposted by Juan C. Mejía-Medina
🚨 New R package! 🚨
balancR provides tools for data balancing + robust scaling analysis, based on our recent Global Ecology & Biogeography paper: doi.org/10.1111/geb....
Co-developed with my PhD advisor @seanmichaletz.bsky.social
Check it out 👉 michaletzlab.github.io/balancR/
balancR provides tools for data balancing + robust scaling analysis, based on our recent Global Ecology & Biogeography paper: doi.org/10.1111/geb....
Co-developed with my PhD advisor @seanmichaletz.bsky.social
Check it out 👉 michaletzlab.github.io/balancR/
July 14, 2025 at 7:07 PM
🚨 New R package! 🚨
balancR provides tools for data balancing + robust scaling analysis, based on our recent Global Ecology & Biogeography paper: doi.org/10.1111/geb....
Co-developed with my PhD advisor @seanmichaletz.bsky.social
Check it out 👉 michaletzlab.github.io/balancR/
balancR provides tools for data balancing + robust scaling analysis, based on our recent Global Ecology & Biogeography paper: doi.org/10.1111/geb....
Co-developed with my PhD advisor @seanmichaletz.bsky.social
Check it out 👉 michaletzlab.github.io/balancR/
Reposted by Juan C. Mejía-Medina
Please spread the word! Authors based in Latin America receive discounts from 35-100% when they publish in #AppsPlantSci, thanks to Wiley's Open Access Pricing Power Parity Pilot (OAPPP Pilot).
Discover your discount at authorservices.wiley.com/author-resou... #OpenAccess #SocietyJournal #botany
Discover your discount at authorservices.wiley.com/author-resou... #OpenAccess #SocietyJournal #botany
July 10, 2025 at 7:37 PM
Please spread the word! Authors based in Latin America receive discounts from 35-100% when they publish in #AppsPlantSci, thanks to Wiley's Open Access Pricing Power Parity Pilot (OAPPP Pilot).
Discover your discount at authorservices.wiley.com/author-resou... #OpenAccess #SocietyJournal #botany
Discover your discount at authorservices.wiley.com/author-resou... #OpenAccess #SocietyJournal #botany
Exploring A-Ci curves in C4 grass!
This is my first time analysing CO₂ response for a C4 plant using the LI-6800 dynamic assimilation technique.
Understanding the productivity and resilience of these tropical forages. 🌱 ✨
This is my first time analysing CO₂ response for a C4 plant using the LI-6800 dynamic assimilation technique.
Understanding the productivity and resilience of these tropical forages. 🌱 ✨
July 4, 2025 at 7:16 PM
Exploring A-Ci curves in C4 grass!
This is my first time analysing CO₂ response for a C4 plant using the LI-6800 dynamic assimilation technique.
Understanding the productivity and resilience of these tropical forages. 🌱 ✨
This is my first time analysing CO₂ response for a C4 plant using the LI-6800 dynamic assimilation technique.
Understanding the productivity and resilience of these tropical forages. 🌱 ✨
Reposted by Juan C. Mejía-Medina
Plant phys folks - question- can city lights increase PAR that much to increase growing seasons? Somewhat skeptical of a PAR impact - but suspect that the warming and artificial water and fertilization signal is much much larger 🌾🌐
Satellite data indicate that artificial light in urban areas can extend plant growing seasons by up to three weeks compared to rural regions, with the effect most pronounced at the end of the season. doi.org/g9qgz9
Artificial light in big cities is extending the growing season of urban plants, satellite observations show
Artificial light may be lengthening the growing season in urban environments by as much as 3 weeks compared to rural areas, according to an analysis of satellite data from 428 urban centers in the Northern Hemisphere over 7 years, published in Nature Cities.
phys.org
June 21, 2025 at 2:09 PM
Plant phys folks - question- can city lights increase PAR that much to increase growing seasons? Somewhat skeptical of a PAR impact - but suspect that the warming and artificial water and fertilization signal is much much larger 🌾🌐
Reposted by Juan C. Mejía-Medina
I have an opportunity for a new PhD student in tropical tree ecophysiology in my lab. Some more details at the link below. Please pass along!
www.findaphd.com/phds/project...
www.findaphd.com/phds/project...
Responses of tropical forest trees to rising carbon dioxide - conifers versus angiosperms at James Cook University on FindAPhD.com
PhD Project - Responses of tropical forest trees to rising carbon dioxide - conifers versus angiosperms at James Cook University, listed on FindAPhD.com
www.findaphd.com
June 17, 2025 at 10:41 PM
I have an opportunity for a new PhD student in tropical tree ecophysiology in my lab. Some more details at the link below. Please pass along!
www.findaphd.com/phds/project...
www.findaphd.com/phds/project...
Reposted by Juan C. Mejía-Medina
Bombings, gun attacks leave 4 dead in southwest Colombia - https://www.dailysabah.com/world/americas/bombings-gun-attacks-leave-4-dead-in-southwest-colombia
Bombings, gun attacks leave 4 dead in southwest Colombia
At least four people were killed in Colombia on Tuesday as the country’s southwest was rocked by a string of 19 coordinated bomb and gun attacks,...
www.dailysabah.com
June 10, 2025 at 8:12 PM
Bombings, gun attacks leave 4 dead in southwest Colombia - https://www.dailysabah.com/world/americas/bombings-gun-attacks-leave-4-dead-in-southwest-colombia
Reposted by Juan C. Mejía-Medina
New Article: "Leaf venation network evolution across clades and scales" rdcu.be/epLNP
Evolution of leaf venation networks, from fewer, corrugated veins to high vein density and smoother loops. Herbivory as a potential driver of venation architectural changes.
Evolution of leaf venation networks, from fewer, corrugated veins to high vein density and smoother loops. Herbivory as a potential driver of venation architectural changes.
June 6, 2025 at 5:24 PM
New Article: "Leaf venation network evolution across clades and scales" rdcu.be/epLNP
Evolution of leaf venation networks, from fewer, corrugated veins to high vein density and smoother loops. Herbivory as a potential driver of venation architectural changes.
Evolution of leaf venation networks, from fewer, corrugated veins to high vein density and smoother loops. Herbivory as a potential driver of venation architectural changes.
Reposted by Juan C. Mejía-Medina
We are launching the Fourth Edition of the Evolutionary Biology Crash Course ⭐ @evobiocc.bsky.social ⭐. There will be three weeks covering a myriad of topics in evolutionary biology with many practicals.
Please RT to reach as many students as possible.
docs.google.com/forms/d/e/1F...
Please RT to reach as many students as possible.
docs.google.com/forms/d/e/1F...
June 2, 2025 at 3:17 PM
We are launching the Fourth Edition of the Evolutionary Biology Crash Course ⭐ @evobiocc.bsky.social ⭐. There will be three weeks covering a myriad of topics in evolutionary biology with many practicals.
Please RT to reach as many students as possible.
docs.google.com/forms/d/e/1F...
Please RT to reach as many students as possible.
docs.google.com/forms/d/e/1F...
Reposted by Juan C. Mejía-Medina
Reposted by Juan C. Mejía-Medina
I made tiramisu in food containers to look like the leaf-warming boxes we're using in an experiment we've almost finished setting up.
Lots of work, but worth it! (Both the experiment and the tiramisu)
Lots of work, but worth it! (Both the experiment and the tiramisu)
May 13, 2025 at 1:48 AM
I made tiramisu in food containers to look like the leaf-warming boxes we're using in an experiment we've almost finished setting up.
Lots of work, but worth it! (Both the experiment and the tiramisu)
Lots of work, but worth it! (Both the experiment and the tiramisu)
An incredible hike in Parque Nacional Natural Farallones Cali, Colombia.
~2860 m.a.s.l
~2860 m.a.s.l
May 8, 2025 at 3:05 PM
An incredible hike in Parque Nacional Natural Farallones Cali, Colombia.
~2860 m.a.s.l
~2860 m.a.s.l
A greenhouse day!
🌱🍃🙌🏼
🌱🍃🙌🏼
April 29, 2025 at 1:57 AM
A greenhouse day!
🌱🍃🙌🏼
🌱🍃🙌🏼
Reposted by Juan C. Mejía-Medina
Atmospheric CO2 has passed 430 parts per million.
The last time atmospheric CO2 was at 430 ppm was during the ancient Pliocene Era, three to five million years ago, and humans didn’t exist.
The last time atmospheric CO2 was at 430 ppm was during the ancient Pliocene Era, three to five million years ago, and humans didn’t exist.
April 22, 2025 at 5:29 AM
Atmospheric CO2 has passed 430 parts per million.
The last time atmospheric CO2 was at 430 ppm was during the ancient Pliocene Era, three to five million years ago, and humans didn’t exist.
The last time atmospheric CO2 was at 430 ppm was during the ancient Pliocene Era, three to five million years ago, and humans didn’t exist.
Reposted by Juan C. Mejía-Medina
After 6 long years, lots of ups and downs, and being far from family, I’m defending my PhD thesis on May 6 at 12:00pm CT - just 16 days away! Still a bit to go, but wanted to share. De Puerto Tejada y Cali para el mundo.
April 19, 2025 at 11:41 PM
After 6 long years, lots of ups and downs, and being far from family, I’m defending my PhD thesis on May 6 at 12:00pm CT - just 16 days away! Still a bit to go, but wanted to share. De Puerto Tejada y Cali para el mundo.
Reposted by Juan C. Mejía-Medina
Leaf drought and heat tolerance are integrated across three temperate biome types
I am very happy to see our paper out! Plant responses to many stresses are mediated by the same processes and I have long wondered how this relates to hotter droughts.
www.nature.com/articles/s41...
I am very happy to see our paper out! Plant responses to many stresses are mediated by the same processes and I have long wondered how this relates to hotter droughts.
www.nature.com/articles/s41...
Leaf drought and heat tolerance are integrated across three temperate biome types - Scientific Reports
Scientific Reports - Leaf drought and heat tolerance are integrated across three temperate biome types
www.nature.com
April 10, 2025 at 2:57 PM
Leaf drought and heat tolerance are integrated across three temperate biome types
I am very happy to see our paper out! Plant responses to many stresses are mediated by the same processes and I have long wondered how this relates to hotter droughts.
www.nature.com/articles/s41...
I am very happy to see our paper out! Plant responses to many stresses are mediated by the same processes and I have long wondered how this relates to hotter droughts.
www.nature.com/articles/s41...
Reposted by Juan C. Mejía-Medina
🌿🔥How heat and VPD shape tree survival? We tested how acclimation to high temperature & VPD impacts drought mortality. While heat speeds up death via leaf area expansion, VPD acclimation slows it down by enhancing stomatal control - balancing mortality timing. doi.org/10.1111/PCE....
March 26, 2025 at 11:14 AM
🌿🔥How heat and VPD shape tree survival? We tested how acclimation to high temperature & VPD impacts drought mortality. While heat speeds up death via leaf area expansion, VPD acclimation slows it down by enhancing stomatal control - balancing mortality timing. doi.org/10.1111/PCE....