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Brad Posch

@bposch.bsky.social
921 followers 363 following 19 posts

Researcher at the Desert Botanical Garden, AZ Plant ecophysiology, heat tolerance, photosynthesis 🌿🌡️ Canberran

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Reposted by Brad Posch
Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 20/08/2026
The Desert Botanical Garden is hiring!! 🌵🌻🏜️ We are looking for a new Chief Research Officer - somebody to lead our fantastic research dept. which encompasses work on plant conservation, climate adaptation, biodiversity, and more! Please share the link below with anybody that may be interested!
recruiting.paylocity.com
Desert Botanical Garden - Vice President & Chief Research Officer
Desert Botanical Garden is seeking a visionary scientific leader to help define the future of desert research. As Vice President & Chief Research Officer, you will set the strategic direction for ...
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Charlotte Grossiord @charlottegrossiord.bsky.social · 08/07/2026
Excited to share our new paper on leaf scorching. 🔥Early leaf browning during heat and drought is often interpreted as premature leaf senescence - but it may reflect rapid heat damage. Separating these processes is essential. www.nature.com/articles/s41... @wslresearch.bsky.social
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Belinda Medlyn @bmedlyn.bsky.social · 22/06/2026
PhD position available: Predicting impacts of extreme heat on Australian forests The world is heating up and forests are starting to show the effects. Like maths? Love trees? Apply your skills to help understand and adapt vegetation to heat extremes! www.westernsydney.edu.au/schools/grs/...
Infra-red image of trees in whole-tree chambers during a heatwave
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Belinda Medlyn @bmedlyn.bsky.social · 22/06/2026
I am hiring! My former postdocs have all gone on to great ongoing roles, so I am now looking for 2 new postdocs in dynamic vegetation modelling: Modelling vegetation-fire interactions in Australia Modelling Australian vegetation distributions Details linked below - please share!
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𝙲𝚑𝚊𝚛𝚕𝚎𝚜 𝙲. 𝙼𝚊𝚗𝚗 @charlescmann.bsky.social · 14/05/2026
The photographic imagery in this NYTimes article about the last full-time museum taxidermist in the United States is fantastic, as is the guy himself.
nytimes.com
At a Los Angeles Museum, Giving New Life to Dead Animals
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Daniel Noble @danielwanoble.bsky.social · 10/05/2026
Our TREE paper out on how a systems modelling approach can help to predict extreme heat impacts with some ideas on how we can move forward in implementing www.cell.com/trends/ecolo...
cell.com
A systems modelling approach to predict biological responses to extreme heat
Anthropogenic climate change is leading to more frequent and extreme heat waves. These large-scale events are radically reshaping interactions among organisms—impacting biodiversity, community composi...
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Jürgen Knauer @juergenknauer.bsky.social · 24/02/2026
🚨Two fully funded PhD opportunities in Australia! Improving C4 photosynthesis in vegetation models. Supervised by Dani Way (ANU, Canberra) and myself (UTS, Sydney). 1. Lab- and field-based project at ANU – see flyer below 2. Modelling project at UTS – www.findaphd.com/phds/project...
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Charlotte Grossiord @charlottegrossiord.bsky.social · 07/01/2026
🌳PhD Opportunity in plant ecophysiology🌡️ Join EPFL (Switzerland) for fully-funded 4yr PhD on tree responses to air drought and heat. Climate chamber + long-term experiments to uncover physiological thresholds under climate change. www.epfl.ch/labs/perl/pe...
epfl.ch
PhD Position: Tree Physiological Responses to Atmospheric Drought
We invite applications for a fully funded four-year PhD position at the École Polytechnique Fédérale de Lausanne (EPFL), Switzerland, with a planned start date in June 2026. The selected candidate wil...
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New Phytologist @newphyt.bsky.social · 23/12/2025
#Leaf economics links #drought and #heat tolerance across contrasting habitats 📖 nph.onlinelibrary.wiley.com/doi/10.1111/... by Wang et al. @WileyPlantSci #PlantScience
A conceptual framework describing how leaf carbon economics, drought, and heat tolerance are coordinated through the divergence of leaf habits of both evergreen and deciduous trees.
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New Phytologist @newphyt.bsky.social · 04/11/2025
High #temperature acclimation of #photosystem II in land plants #TansleyReview by @bposch.bsky.social et al. nph.onlinelibrary.wiley.com/doi/10.1111/... @hultinelab.bsky.social #PlantScience #photosynthesis
Venn diagram of major strategies used to cope with heat stress with examples of species expected to specialize in heat tolerance/acclimation (yellow circles), heat avoidance through drought-deciduousness (green circles), and heat avoidance through homeothermic leaf cooling (blue circles).
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Owen Atkin @owenatkin.bsky.social · 03/11/2025
Save the date! 47th New Phytologist Symposium on 'Extreme Heat: extending the thermal limits of life'. Explore how extreme heat affects plants that underpin ecosystem productivity. 2-5 June 2026, Cordoba, Spain. @newphyt.bsky.social www.newphytologist.org/events/47-nps
newphytologist.org
Extreme Heat: extending the thermal limits of life
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Brad Posch @bposch.bsky.social · 03/11/2025
Check out our new Tansley Review on leaf heat acclimation in @newphyt.bsky.social, the result of a great collaboration with an even greater team! @martijnslot.bsky.social @seanmichaletz.bsky.social @nicolebison.bsky.social @luiza-aparecido.bsky.social @owenatkin.bsky.social @hultinelab.bsky.social
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Charlotte Grossiord @charlottegrossiord.bsky.social · 27/10/2025
🌿 Join us at #EGU26 for session BG3.37 – Impacts of climatic extremes on plants & ecosystems! 🔥 We welcome studies on heat, drought & variability from leaf to landscape 🌍 Submit your abstract 👉 meetingorganizer.copernicus.org/EGU26/sessio... @kateplantphys.bsky.social @alyssakullberg.bsky.social
meetingorganizer.copernicus.org
Session BG3.37
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Mary Heskel @maryheskel.bsky.social · 18/08/2025
Hi All! I'm back from sabbatical and teaching Plant Ecophys again - a class near and dear to my heart! In the past, I've welcomed grad students and post-docs to share their research with students and their stories about how they got into the field.....
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Brad Posch @bposch.bsky.social · 31/07/2025
#PlantSciJobs
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Sean Michaletz @seanmichaletz.bsky.social · 25/06/2025
Submit an abstract to our #AGU2025 session "Heat and Microclimate Impacts on Plant Functioning: From Molecules to the Biosphere" (agu.confex.com/agu/agu25/pr...) @nicolebison.bsky.social @luiza-aparecido.bsky.social @bposch.bsky.social @agu.org @agubiogeosciences.bsky.social @gec-agu.bsky.social
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Michael E. Mann @michaelemann.bsky.social · 23/06/2025
"Heat waves are getting more dangerous with climate change — and we may still be underestimating them" | Nice piece by @afreedma.bsky.social for @cnn.com that references our recent @pnas.org article: edition.cnn.com/2025/06/23/c...
edition.cnn.com
Heat waves are getting more dangerous with climate change — and we may still be underestimating them | CNN
The intensifying and expansive heat wave affecting around 150 million people in the United States from Wisconsin to Washington, DC, bears the hallmarks of human-caused global warming.
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 17/05/2025
Check out this recently published paper by Seeley et al. in the Journal of Ecology illustrating how remote sensing reveals inter- and intraspecific variation in riparian cottonwood (Populus spp) responses to drought. The paper can be found at: besjournals.onlinelibrary.wiley.com/doi/abs/10.1...
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Central Arizona Conservation Alliance @cazca.bsky.social · 13/05/2025
🚨Job Alert 🚨 The Desert Botanical Garden is hiring a Scientific Illustrations Intern 🌵✏️ Get your portfolio together and submit your application here: recruiting.paylocity.com/Recruiting/J... #ConservationJobs #BotanicalIllustration #Hiring
recruiting.paylocity.com
Desert Botanical Garden - SCIENTIFIC ILLUSTRATION INTERN
   Funding will support 20hrs/week for 4 months. The time frame may be flexible. DescriptionTo assist Garden Researchers’ research taxonomic treatments by providing scientific illu...
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 10/05/2025
New paper published by Wilder et al. in the journal Global Change Biology reveals how recent anomalous drought and heat events are impacting native succulents in the Sonoran Desert. The paper can be accessed at: onlinelibrary.wiley.com/doi/10.1111/...
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Rodger Sherman @rodger.bsky.social · 06/05/2025
THE NEW YORK KNICKS
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Doug Orr @doug-orr.bsky.social · 01/05/2025
Just over a week left to apply for a 3yr postdoc with me at Lancaster @lancasterplantbio.bsky.social looking at Rubisco engineering in vitro and in vivo to improve plant #photosynthesis #plantscijobs wp.lancs.ac.uk/lancsphotosy...
wp.lancs.ac.uk
Making the most of sunshine
Photosynthesis Research at the Lancaster Environment Centre
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Louis Santiago @santiago-ecofiz.bsky.social · 10/04/2025
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...
nature.com
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
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Doug Orr @doug-orr.bsky.social · 09/04/2025
This post is now online, for full details on how to apply please see: wp.lancs.ac.uk/lancsphotosy...
wp.lancs.ac.uk
New postdoc position available with Doug
Recruiting has just opened for a Plant Molecular Physiologist postdoc position with Doug to work on Rubisco engineering, biochemistry, and impacts of photosynthesis. This is part of a BBSRC funded …
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Doug Orr @doug-orr.bsky.social · 23/03/2025
Excited to share that I'll soon be recruiting a 3 year postdoc to join the lab @lancasterplantbio.bsky.social to work with me on Rubisco biochemistry and engineering. Official advertising details to be released very soon, watch this space! Please spread the word. 😀🌱🧪🥼
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Sean Michaletz @seanmichaletz.bsky.social · 13/03/2025
Fully funded PhD in Plant Ecophysiology at UBC in Vancouver 🍁! Possible topics include leaf physiology, thermal ecology, microclimates, scaling, tree physiology, forest ecology & more. Start Jan/May/Sept 2026. michaletzlab.org Please share! #PlantEcoPhys #Ecology #Botany #PhDposition #GradSchool
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Brad Posch @bposch.bsky.social · 04/02/2025
Has to be up there as one of my favourite saguaros in the valley 🌵 #arizona #cacti #botany
A saguaro cactus standing over 20 feet tall, with over ten arms, some of them over 10 feet long and jutting out in all kinds of directions
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 27/01/2025
Need a Monday pick-me-up? Here's a throwback to 2022, when our field ecology program director Susan Bush had an extraordinary encounter with a huge band of coatimundis while working at our field site in Wet Beaver Creek, AZ How many can you spot?? #coati #ecology #fieldwork #arizona
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 24/01/2025
Mapping the roots of saguaros at Saguaro NP. The DBG is partnering with SNP and the U of Wyoming to map the roots of saguaros. Knowing the distribution of saguaro roots reveals how sensitive they are to droughts, and to what extent these iconic plants engineer the water cycle of desert ecosystems.
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Darnay Tripp @darnay.bsky.social · 21/01/2025
Might listen to this saxophone solo on an endless loop today. Rest in Peace and eternal gratitude to Garth Hudson, an actual musical genius and the last surviving member of the Band. “Garth made us sound like we did.” youtu.be/Q7yOGAmItFY?...
youtu.be
It Makes No Difference - The Band - The Last Waltz
YouTube video by Just A Account
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david ehrlich @davidehrlich.bsky.social · 16/01/2025
David Lynch gave us the language we needed to better articulate the indescribable strangeness of our shared reality. “Lynchian” is so overused because it’s a viscerally understandable word without any known synonyms. I can’t imagine a more beautiful artistic legacy than that.
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Diego A. Márquez @dmarquez.bsky.social · 14/01/2025
Excited to share our paper with Anna Gardner and @florianabusch.bsky.social in Plant Ecophysiology!🌿 We review challenges in interpreting plant stress responses using gas exchange data, offer solutions to improve accuracy and discuss gaps in our current knowledge. www.sciltp.com/journals/Pla...
Detailed representation of H2O gas exchange (left) and CO2 gas exchange (right) at the adaxial (upper) and abaxial (lower) leaf surfaces in an amphistomatous leaf. This panel illustrates the separate gas exchange processes for each leaf surface, which can be measured individually if the upper and lower cuvettes are analysed separately—though this setup is not common in commercial gas exchange systems. Stomatal, cuticle, and boundary layer resistances are depicted for both surfaces, along with the mole fractions of water vapour and CO2.
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Brad Posch @bposch.bsky.social · 22/12/2024
Enjoyed chatting about our recent work on leaf cooling during extreme heat! If the clip has you curious, you can find the paper here www.pnas.org/doi/10.1073/...
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Sean Michaletz @seanmichaletz.bsky.social · 17/12/2024
New in #NewPhytologist: Temperature governs the relative contributions of cuticle and stomata to leaf minimum conductance (shorturl.at/f9h7O) - Exciting work with #MichaletzLab PhD graduate #JosefGaren @ubcbotany.bsky.social @ubcbiodiversity.bsky.social @science.ubc.ca @newphyt.bsky.social
Leaf water fluxes during times of high and low water availability.
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 09/12/2024
Check out this recently published paper by PhD candidate Marilynn Vazquez-Cruz on the evolutionary origin and climate niche space of succulent plants: doi.org/10.1093/jxb/... #Botany #PlantScience
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Owen Atkin @owenatkin.bsky.social · 05/12/2024
Just out! By using high-thru-put phenotyping, we show that 60% of variation in wheat leaf respiration is under environmental control, with upto 1/3 of variance under genetic control. Super proud of Reshmi and team. @jxbotany.bsky.social @anuagrifood.bsky.social academic.oup.com/jxb/advance-...
academic.oup.com
Accounting for the impact of genotype and environment on variation in leaf respiration of wheat in Mexico and Australia
We show that one-third of the variation in leaf dark respiration (Rdark ) of wheat is under genetic control—creating an opportunity to use Rdark as a novel
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Luiza Aparecido @luiza-aparecido.bsky.social · 03/12/2024
For folks attending #AGU24, our lab has its 1st conference poster presentation led by PhD student Rebecca Senft! @RebeccaSenft Stop by her poster on the morning of Tues Dec10 to learn about the ecohydrology of contrasting riparian tree species (invasive vs native) in SE Utah. #ecophys #invasion
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 26/11/2024
They say when life gives you lemons, make lemonade 🍋 Well when Phoenix gives you record heat, you study plant heat tolerance! This summer we used the natural heat to get our greenhouse up beyond 50°C (!) and studied how 8 dryland species responded - stay tuned for results! #Botany #PlantScience 🧪
multiple species of dryland plants sit on a bench inside a greenhousea data logger showing that air temperature reached 52.5 °C inside our greenhouse
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Owen Atkin @owenatkin.bsky.social · 25/11/2024
Plant respiration alert! Important new review by Amthor in Field Crops Research. Key take homes: 30-60 % of Cassimilated in photosynthesis is later respired; opp to improve yield by reducing nonessential respiration; respiration a target for crop improvement. www.sciencedirect.com/science/arti...
sciencedirect.com
After photosynthesis, what then: Importance of respiration to crop growth and yield
Respiration is an essential link between assimilation of carbon and energy in photosynthesis and subsequent growth and yield of all crops. It provides…
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 21/11/2024
🚨 Paid research experience for undergrads! 🚨

 Apply now for undergrad research summer program in Dr. Luiza Aparecido’s plant ecophys lab @ U of Utah, studying plant heat tolerance across Utah (May 19-Aug 1, 2025) For more info contact luiza.aparecido@biology.utah.edu

#botany #PlantSciJobs
Advertisment for undergrad research program in Aparecido lab at U of Utah. Deadline is Jan 26, 2025.
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William Hammond @wmhammond.bsky.social · 21/11/2024
Do you want to join my plant ecophysiology lab studying plant stress and mortality? I am hiring a biological scientist, a permanent research support position. Job posting and more information available here: explore.jobs.ufl.edu/en-us/job/53...
explore.jobs.ufl.edu
University of Florida - Details - Biological Scientist III
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 18/11/2024
Check out this recent paper by Dr. Jaclyn Corbin et al. in Plant, Cell and Environment showing how leaf reflectance can predict interactive genetic and environmental effects on tree phenotypes: doi.org/10.1111/pce.... #OpenAccess #PlantBiology #Botany
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 15/11/2024
All about saguaros. Lab manager Ali Schuessler presented to over 150 members of the Desert Foothills Land Trust in North Phoenix. Record temperatures in Phoenix have decimated thousands of saguaros and the public is taking notice. The DBG is researching strategies to protect saguaros. #Botany
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Bluesky @bsky.app · 18/08/2023
One part of our upgraded infrastructure may affect your profile. If you see your handle now says “Invalid handle,” please reverify it by navigating to Settings > Change my handle > Type in your current handle > Verify DNS Record > Update. (Basically, update to the same handle.)
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 13/11/2024
Phoenix just experienced its hottest summer on record! Our lab focuses on studying plant ecophysiology traits that underlie adaptation to heat waves and drought in the Phoenix area, Sonoran Desert region, and drylands across the globe. Check out our web page at: dbg.org/research-con...
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Dr Olivier Jean Leonce Manzi @olivierjlmanzi.bsky.social · 12/11/2024
Canopy temperatures strongly overestimate leaf thermal safety margins of tropical trees - Manzi - 2024 - @newphyt.bsky.social nph.onlinelibrary.wiley.com/doi/10.1111/...
nph.onlinelibrary.wiley.com
Canopy temperatures strongly overestimate leaf thermal safety margins of tropical trees
Current estimates of temperature effects on plants mostly rely on air temperature, although it can significantly deviate from leaf temperature (Tleaf). To address this, some studies have used cano...
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Alice Gauthey @a-gthy.bsky.social · 12/11/2024
Exciting first post on BlueSky: We have a PhD opportunity with Anna Gardner & me @BIFoRUoB in mangroves ecophysiology! 🌱 🌡️ Potential funding through @CENTA_NERC - see here: centa.ac.uk/studentship/...
centa.ac.uk
2025-B34 Mangroves in a changing climate: impacts of elevated carbon dioxide and rising temperatures on mangroves’ carbon and water dynamics – CENTA
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Dryland Plant Ecophysiology Lab @hultinelab.bsky.social · 31/10/2024
What sets succulent leaves apart from non-succulent leaves? A recent work in @annbot.bsky.social led by former lab PhD Dr. Giacomo Mozzi presents a structural leaf trait spectrum in succulent leaf taxa, and maps contrasts in leaf water storage vs. SLA doi.org/10.1093/aob/... #Botany #PlantScience
doi.org
Divergent structural leaf trait spectra in succulent versus non-succulent plant taxa
AbstractBackground and Scope. Plant functional traits are the result of natural selection to optimize carbon gain, leading to a broad spectrum of traits ac
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Nick Smith @nickgregsmith.bsky.social · 24/10/2024
Interested in ecosystem C-N coupling and cycling? See our new Tansley Review in @newphyt.bsky.social : "Empirical evidence and theoretical understanding of ecosystem carbon and nitrogen cycle interactions". Led by @stineb.bsky.social and #LEMONTREE team nph.onlinelibrary.wiley.com/doi/10.1111/...
nph.onlinelibrary.wiley.com
Empirical evidence and theoretical understanding of ecosystem carbon and nitrogen cycle interactions
Interactions between carbon (C) and nitrogen (N) cycles in terrestrial ecosystems are simulated in advanced vegetation models, yet methodologies vary widely, leading to divergent simulations of past ...
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Brad Posch @bposch.bsky.social · 15/10/2024
Leaf cooling during extreme heat 🌡️🍃 Leaf thermal thresholds breached 🥵 Tradeoffs between thermal and hydraulic safety 🤝 Read about all this and more in our new paper in PNAS! #Botany #PlantScience 🌾🧪 www.pnas.org/doi/10.1073/...
pnas.org
Intensive leaf cooling promotes tree survival during a record heatwave | PNAS
Increasing heatwaves are threatening forest ecosystems globally. Leaf thermal regulation and tolerance are important for plant survival during heat...
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