Valentin Journé
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valentinjourne.bsky.social
Valentin Journé
@valentinjourne.bsky.social
Functional ecology, forests, tree reproduction, species distribution

Assistant professor at Kyushu University

http://journevalentin.wixsite.com/forestecol
Thanks to people that contributed to this huge database, and my collaborator's! The two I have found here @andrewhacket-pain.bsky.social , @micbog.bsky.social and of course those that are missing , D. Kelly, J. Foest, I. Oberklammer, M. Pesendorfer, A. Satake, K. Kondrat, J. Szymkowiak, I Pearse
October 20, 2025 at 4:34 AM
Of course this is the first step, more need to be done for example to understand how plants can perceive environmental cues. And this is what we are doing (:
For now, our study provides the first global synthesis of weather–reproduction relationships in perennial plants!
October 20, 2025 at 4:34 AM
This means that climate change will affect better reproduction ! Warmer conditions in temperate areas mean that reproductions might be more constant . Whereas in the tropics, if cold weather is too rare then we could expect more failure of reproduction! 🚦
October 20, 2025 at 4:34 AM
But temperature acts differently according to regions. Trees growing in boreal and temperate regions require warm summer and spring. Whereas in the tropics, plants need cold temperatures.
October 20, 2025 at 4:34 AM
Temperature is the main dominant driver related to seed production. Other matters , but to a lower extent
October 20, 2025 at 4:34 AM
🌳🌲So here is what we did, we look at important weather relationships to seed production using the largest open database , MASTREE+. We analysed more than 300 plant species, using moving windows analysis. And here is what we found:
October 20, 2025 at 4:34 AM
For example in European beech trees , we know that previous summer temperatures are super important and can trigger reproduction. But what about the other species ?
October 20, 2025 at 4:34 AM
In most perennial plants (like trees), we can observe years with heavy crops when many seeds will be produced. This phenomenon is called mast seeding or masting, and has huge implications ( food web, adaptation because without seeds no new generation etc). And it is related to weather
October 20, 2025 at 4:34 AM