Charlotte Grossiord

@charlottegrossiord.bsky.social

590 followers 300 following 19 posts

🌳 Plant ecophysiologist 🌳 | Heat and drought impacts | Professor at EPFL | Group leader at WSL, Lausanne, Switzerland 🇨🇭 | she/her https://www.epfl.ch/labs/perl/

Videos

Environmental science 60%

Geography 18%

Posts Replies Media Videos

Reposted by Anne D. Bjorkman

Charlotte Grossiord @charlottegrossiord.bsky.social · 21d

🌿 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

Session BG3.37

meetingorganizer.copernicus.org

Reposted by Charlotte Grossiord

New Phytologist @newphyt.bsky.social · 21d

It's time to apply for the New Phytologist #TansleyMedal for excellence in #PlantScience.

Open to early career researchers with 3 to 5 years experience post-PhD.

Applications close on 1 November. Don't miss out!

www.newphytologist.org/grants-award...

#ecrchat #phdchat

Reposted by Pierre Mariotte

Charlotte Grossiord @charlottegrossiord.bsky.social · 28d

🌿Postdoc opening in Urban Ecophysiology at WSL Lausanne - start March 2026. Join Horizon Europe FRAIMwork on green walls: carbon sink, water use efficiency & air quality. Apply via WSL careers page: m.refline.ch/273855/1786/... @wslresearch.bsky.social

Reposted by Charlotte Grossiord, Pierre Mariotte

Helena Vallicrosa @vallicrosah.bsky.social · Sep 5

Sampling success at the @arnoldarboretum.bsky.social with @alyssakullberg.bsky.social and Thibaut. What an amazing place to work! If you have temperature thresholds data and want to join forces, let us know! You'll make us and @charlottegrossiord.bsky.social happy.

Reposted by Rob Marchant, Francis Martin, Ben Bond‐Lamberty , and 9 more Rob Marchant, Francis Martin, Ben Bond‐Lamberty, Joshua B. Fisher, Benjamin I. Cook, Rosie A. Fisher, Tommaso Jucker, Pierre Mariotte, Valentin Journé, Simon Haberstroh, Alba Anadon‐Rosell, Elisabet Martínez‐Sancho

Charlotte Grossiord @charlottegrossiord.bsky.social · Aug 20

New PhD position in Plant Ecophysiology🌳 Study how atmospheric & soil drought shape tree carbon & water relations at the VPDrought experiment in Switzerland. Start Jan 2026. Apply here: m.refline.ch/273855/1759/... @wslresearch.bsky.social

Reposted by Charlotte Grossiord

Janisse Deluigi @janissedeluigi.bsky.social · Apr 30

Can beech and oak saplings adjust to prolonged periods of warmer temperatures🌡and soil drought? 🏜
Come find it out at my presentation at @egu.eu!
Looking forward to this experience as a first attendee!

Reposted by Charlotte Grossiord, Marcos Fernández‐Martínez, Drew Peltier

Helena Vallicrosa @vallicrosah.bsky.social · Apr 23

Did you ever wonder when to use "conifer", "gymnosperm", "needleleaf", "angiosperms" and "broadleaves"? Us too so we transformed the discussion into this viewpoint. I hope you enjoy the reading as much as we enjoyed the writing! @kateplantphys.bsky.social nph.onlinelibrary.wiley.com/doi/full/10....

Cones and consequences: the false dichotomy of conifers vs broad‐leaves has critical implications for research and modelling

In plant science research and modelling, particularly from the northern hemisphere, the terms ‘needle-leaved’ and ‘conifer’ along with ‘broad-leaved’ and ‘angiosperm’ are often used synonymously, cre...

nph.onlinelibrary.wiley.com

Charlotte Grossiord @charlottegrossiord.bsky.social · Apr 22

🌳Urban trees keep cooling - even during record-breaking heatwaves! We show that trees maintained high transpiration, defying model predictions. Tree cooling during heat may be underestimated 🌡️💦
Great study led by Christoph Bachofen @wslresearch.bsky.social doi.org/10.1016/j.uf...

Charlotte Grossiord @charlottegrossiord.bsky.social · Apr 8

Of course that‘s just some initial thoughts, and it definitly requires further reflection 😊

Charlotte Grossiord @charlottegrossiord.bsky.social · Apr 8

Great question Rosie! We first need to understand how these limits vary broadly among species/PFTs. We then also need to integrate them into stress/mortality algorithms (heat-related thresholds, thermal damage functions related to cumulative exposure) and couple it of course with drought stress

Charlotte Grossiord @charlottegrossiord.bsky.social · Apr 8

💥What we found:
Tcrit is stable and reversible
T50 & Tmax drop with longer exposure & depend on method
Recovery mainly happens before T50 - beyond that damage is irreversible.
If you want to predict forest resilience, method and duration can’t be ignored 🌿

Charlotte Grossiord @charlottegrossiord.bsky.social · Apr 8

onlinelibrary.wiley.com/doi/10.1111/...
🌿How you measure heat tolerance matters! We tested 3 species under different methods & durations to find their thermal limits.
@a-gthy.bsky.social @kateplantphys.bsky.social @philippschuler.bsky.social

Leaf Excision and Exposure Duration Alter the Estimates of the Irreversible Photosynthetic Thermal Thresholds

Our study highlights the importance of assessing thermal thresholds using consistent exposure duration and plant material type when comparing studies, as well as their relationship to functional re...

onlinelibrary.wiley.com

Charlotte Grossiord @charlottegrossiord.bsky.social · Apr 4

Really great paper! It shows that while photosynthetic acclimation to warming can matter at the leaf level, it might become irrelevant at the canopy scale for total carbon uptake - simply because of reduced canopy size. Scale matters! 🌿🔥

Charlotte Grossiord @charlottegrossiord.bsky.social · Apr 3

Congrats Janisse!

Reposted by Charlotte Grossiord

Janisse Deluigi @janissedeluigi.bsky.social · Apr 3

My first paper is out! We investigated how #photosynthetic and #respiratory #thermal #acclimation 🌡️ and #canopy size 🌳 shape tree net #carbon uptake under prolonged warming and drought. Check it out: onlinelibrary.wiley.com/share/author...

@charlottegrossiord.bsky.social
@wslresearch.bsky.social

Charlotte Grossiord @charlottegrossiord.bsky.social · Mar 27

Fantastic study using a combination of a long-term manipulative study, microCT and modelling (Sureau) led by Laura Mekarni, together with @hcochard.bsky.social

Charlotte Grossiord @charlottegrossiord.bsky.social · Mar 26

onlinelibrary.wiley.com/doi/abs/10.1...

Acclimation to High Vapor Pressure Deficit in Warmer Air Can Reduce Tree Vulnerability to Drought‐Induced Mortality

Trees of the European tree species Prunus mahaleb, Quercus robur, and Populus nigra demonstrated both favourable and unfavourable acclimation mechanisms to high vapour pressure deficit and temperatur...

onlinelibrary.wiley.com

Charlotte Grossiord @charlottegrossiord.bsky.social · Mar 26

Sorry, the doi is correct but it seems that has not been activated yet. It works when you go through the PCE website first

Charlotte Grossiord @charlottegrossiord.bsky.social · Feb 7

Had an amazing time with the PERL group on our first night-time sledding adventure in the Swiss mountains! Great fun, lots of laughs, and unforgettable moments, speeding down the slopes under the stars. ❄️🛷✨

Reposted by Charlotte Grossiord

New Phytologist @newphyt.bsky.social · Feb 6

'What excites me is the chance to work with incredible scientists from all over the world, some of whom are just starting their scientific journey.'

In #Profile: Charlotte Grossiord 👇

📖 https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.20404

#LatestIssue #PlantScience

Charlotte Grossiord, suspended from a tree in a woodland by a rope and climbing harness.

Charlotte Grossiord @charlottegrossiord.bsky.social · Jan 30

🌿 Join us for a workshop at our unique VPDrought field site in Switzerland on Aug 21-22, 2025! The event will feature a field site tour & presentations from experts studying VPD impacts on forests worldwide. Don’t miss the chance to connect & collaborate! www.wsl.ch/en/events-an...

Charlotte Grossiord @charlottegrossiord.bsky.social · Jan 8

Interested in plants under climate extremes? 🍃🌡️💧❄️

Submit an abstract to our session at EGU in Vienna, 27th April- 2nd May 2025! meetingorganizer.copernicus.org/EGU25/sessio...

Abstracts due Jan 15th
@kateplantphys.bsky.social

Browse by session

https://meetingorganizer.copernicus.org/EGU25/session/…

Reposted by Charlotte Grossiord

Marco M. Lehmann @lehmannmm.bsky.social · Jan 6

#Isotope Folks!! We are thrilled to invite you to our #EGU25 𝐬𝐞𝐬𝐬𝐢𝐨𝐧 𝐨𝐧 𝐈𝐬𝐨𝐭𝐨𝐩𝐞 𝐄𝐜𝐨𝐥𝐨𝐠𝐲 across ecosystems, life forms, scales, & cutting-edge methods. Share your research & join this interdisciplinary discussion!

🔗 Learn more: tinyurl.com/IsotopeEcolo...
Abstract deadline: 15 Jan 2025