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SUMMARY:CLIMACT Seminar Series - Marco Keiluweit & Meret Aeppli
DTSTART:20221212T120000
DTEND:20221212T131500
DTSTAMP:20260505T010229Z
UID:9cbdd5af5af0556a53dbd0604b8a5d56ea371c9d626b2bc8c269a3c3
CATEGORIES:Conferences - Seminars
DESCRIPTION:The CLIMACT seminar series “A Climate of Transformation” i
 s an interactive online event. It takes place twice a month\, every second
  Monday during your lunch break\, with two new speakers.\nEach episode aim
 s to strengthen the dialogue and collaboration between key UNIL and EPFL s
 cientists\, swiss politicians\, entrepreneurs and various actors from the 
 civil society\, through collective reflection.\nA wide range of climate ch
 ange-related topics will be discussed\, integrating perspectives from all 
 sectors and academic disciplines in order to generate new leads and initia
 tives towards systemic solutions.\nYour expertise\, ideas\, critical think
 ing and vision for the future is essential. \nJoin CLIMACT in the discuss
 ion!\n\nMapping Carbon Flow through Soils: Ecosystem and Global Impact\nPr
 esented by Marco Keiluweit I  Professor at the Faculty of Geosciences and
  Environment\, UNIL\n\n\nSoils contain the largest dynamic stock of carbon
  (C) on the planet\, with soil organic matter (SOM) containing approximate
 ly twice the amount of C stored in the surface oceans and three-times that
  in the atmosphere. Yet it remains largely unknown why some SOM persists f
 or millennia whereas other SOM decomposes readily—and this limits our ab
 ility to predict how soils will respond to climate and land use change. Re
 cent analytical and experimental advances have undermined the long-standin
 g theory that molecular structure alone controls SOM turnover\; instead\, 
 SOM turnover is now considered an ecosystem property\, rendering associate
 d C stocks much more vulnerable to environmental change. In this talk\, I 
 will highlight how plants\, microbes\, and minerals interact to regulate S
 OM turnover within soil ecosystems. I will further show that explicit cons
 ideration of such ecosystem controls\, together with climatic variables\, 
 is critical for improved predictions of soil carbon-climate feedbacks as w
 ell as management strategies aimed at sustaining soil health.\n\nElectron 
 transfer reactions in soils: implications for biogeochemical element cycli
 ng\nPresented by Meret Aeppli I Professor at the Soil biogeochemistry Labo
 ratory of ENAC\, EPFL\n\n\nElectron transfer (redox) reactions are central
  to the transformation of energy in the environment and play an important 
 role in the cycling of elements. In soils\, one of the main drivers of ca
 rbon cycling is the activity of organisms that utilize the energy stored i
 n soil organic matter by extracting electrons from organic carbon and tra
 nsferring them to various electron acceptors. Yet\, our understanding of t
 his process is incomplete and the response of the soil carbon pool to cli
 mate change remains one of the primary sources of uncertainty in projecti
 ons of atmospheric carbon dioxide concentrations. Here\, I highlight the r
 elevance of redox reactions in soils and\, specifically\, the role of red
 ox-active minerals in soil carbon cycling under oxygen-limited conditions.
 \n\n\n\n\n
LOCATION:https://epfl.zoom.us/j/63821341998
STATUS:CONFIRMED
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