Juan C. Mejía-Medina

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...

Slow-growing trees in arid environments live longer 🧪🌱

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

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/...

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...

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

🚨 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/

Map of Mexico, Central, and South America, with the text: “Authors in Latin America receive special discounts when they publish in Applications in Plant Sciences.” The APPS and Botanical Society of America logos are in the bottom corners.

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

I'd love to attend the Botany 2025, but I'm staying close to ongoing work this season. Looking forward to following along and staying connected with the community!

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. 🌱 ✨

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 🌾🌐

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

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...

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,...

Bombings, gun attacks leave 4 dead in southwest Colombia - https://www.dailysabah.com/world/americas/bombings-gun-attacks-leave-4-dead-in-southwest-colombia

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.

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...

Alwyn Gentry died young, but left a forest’s worth of ideas behind Founder’s Briefs: An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. Long before “biodiversity hotspot” became a conservation cliché, Alw...

“Science,” he once said, “starts with seeing.”

news.mongabay.com/short-articl...

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)

Mountain peak in Pico De Loro

Cavendishia Sp.

An incredible hike in Parque Nacional Natural Farallones Cali, Colombia.

~2860 m.a.s.l

Que orgullo 🇨🇴, muchísimas felicidades Dr.Salazar!!! ✨🙌🏼

Hydroponic growing tropical forages.

Forages monitoring root growth.

A greenhouse day!

🌱🍃🙌🏼

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.

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.

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

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...

🌿🔥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....

An opening bud of northern red oak, Quercus rubra, with brilliant red, fuzzy small leaves, the edges of each leaf ending in yellow bristles. Copyright Tom Kimmerer

An opening bud of yellow buckeye, Aesculus flava, with long, curled, dark green leaflets below a flower stem, also dark green. Copyright Tom Kimmerer

An opening bud of bitternut hickory, Carya cordiformis, with very small, yellow leaflets beginning to unfold. Copyright Tom Kimmerer

An opening bud of willow oak, Quercus phellos, with yellow-green leaflets just beginning to unfurl from a bright red branch. Copyright Tom Kimmerer

Buds are beginning to open. In the majority of temperate trees, all of the leaves and flowers that will grow this season were formed in the bud last year. That means that this year's growth is dependent on last year's weather. Opening buds are beautiful and worth a close look. What are you seeing?

Honoured to contribute towards the first 100 years of tropical ecosystem research on Barro Colorado (eds. Muller-Landau & Wright):
scholarlypress.si.edu/store/all/th...
Our SWELTR chapter here:
smithsonian.figshare.com/articles/cha...

Map of lightning strikes in the Bluegrass last night. Dark blue dot is Lexington. Red dots are recent strikes, yellow dots are older. Strikes are overlaid on a radar map. Source: My Lightning Tracker app

A large, healthy deep green bur oak next to a basketball court in Castlewood Park in the Bluegrass. To the left are kids playing basketball, to the right is a brick building. Copyright Tom Kimmerer

The same bur oak as in the previous photo one day after being struck and killed instantly by lightning. Copyright Tom Kimmerer

A large, very old bur oak many years after a lightning strike. The top of the tree was destroyed and there is an open wound in the bark down the length of the stem. Copyright Tom Kimmerer

Lightning, as in last night's dramatic storm (map) is a major natural cause of damage and death to old trees. Lightning can cause instant death (second and third photos - the same tree days apart), or damage a tree without killing it (fourth photo). Climate change is increasing lightning frequency.

PLEASE REPOST! Know someone doing #innovative research who could use $1000 for a conference this year? APPLY TODAY! bit.ly/PPSITA bit.ly/PPSITA #plantscience #soilscience #earthscience @asa-cssa-sssa.bsky.social @ashs-hort.bsky.social @ecologicalsociety.bsky.social @agu.org @aspbofficial.bsky.social

Just Built My First Shiny App!

I’m thrilled to share my new interactive R web app for biology and plant breeding data. Thanks to a course from the Shiny Posit Academy, I’ve kicked off my Shiny app development journey!

🌱🔬💻 #ShinyApp #RCoding #Biology #PlantBreeding #DataScience #InteractiveAnalysis

Beat the heat: need for research studying plant cell death induced by extreme temperatures Extreme temperatures surpassing 45°C can cause widespread plant damage and mortality, with severe consequences for ecosystem health, agricultural productivity, and urban greenery, thus negatively imp...

Temperatures that switch on plant programmed cell death are now reality.
In our new viewpoint article @newphyt.bsky.social, we propose that studying the heat induced mortality at cellular level can contribute to strategies for heat stress mitigation.

nph.onlinelibrary.wiley.com/doi/full/10....