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Vortragsreihe Ökologie und Umweltforschung WS 2023/24

Dr. Christoph Bachofen
EPFL Lausanne, Plant Ecology Research Laboratory (Homepage)
Donnerstag, 09.11.2023 12:15-13:45,

From the forest to the city: understanding tree interactions with the urban microclimate

A future warmer and drier climate will heavily restrict tree water uptake, transpiration and photosynthesis, and thereby affect the whole soil-plant-atmosphere continuum. Trees can acclimate to environmental change, but the extent to which they are capable to modify leaf physiology, leaf anatomy or whole-plant morphology under heat and drought stress are not well known. This has consequences both for trees in forests, where long-term responses of species with different water-use strategies are being investigated, as well as in cities, where trees have important beneficial effects on human well-being.

In this colloquium I will lay out where we are in our current understanding of the physiological, anatomical and morphological acclimation responses of trees to heat and drought stress. The study systems include experimental set-ups with heat and drought treatments, as well as field studies in forest ecosystems. In several recent research projects, we have been observing acclimation in a number of tree functional traits, but many traits also seem to be relatively static. Using mechanistic soil-plant-atmosphere models I've been studying the consequences this has on the whole-plant carbon and water budget. I will conclude the talk by going from the forest to the city and present the challenges trees face in this environment, as well as their benefits and how we can better understand them to improve urban green infrastructure.

 

***invited by BayCEER-member Lisa Hülsmann

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Das BayCEER-Kolloquium dient als interdisziplinäre Plattform für Studierende, Wissenschaftler*innen und Interessierte: während der Vorlesungszeit geben Gäste und Mitglieder des BayCEER Einblicke in ihre Forschung, die im Hörsaal und in lockerer Atmosphäre beim Postkolloquiums diskutiert werden.

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