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SUMMARY:EESS talk on "Carbon cycling in temporary and shrinking waters: do
 ing limnology when water vanishes"
DTSTART:20210511T121500
DTEND:20210511T130000
DTSTAMP:20260506T154728Z
UID:59b1a3a24e8ef9e5ae47d465da6ad05d4a89995b53d0be373af8c4d6
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Biel Obrador Sala\, Associate professor\, Department of Evo
 lutionary Biology\, Ecology and Environmental Sciences\, Faculty of Biolog
 y\, University of Barcelona\, ES\nAbstract:\nInland waters play a signific
 ant role in the global carbon cycle by regulating how much continental car
 bon finally reaches the oceans. The sediments of lakes and reservoirs accu
 mulate terrestrial organic carbon\, and inland waters have emerged as acti
 ve carbon reactors delivering large amounts of greenhouse gases to the atm
 osphere\, mainly in the form of carbon dioxide (CO2) and methane (CH4). Th
 is view of inland waters as active biogeochemical reactors processing carb
 on from terrestrial ecosystems has redefined their role in the carbon budg
 ets and landscape\, continental and global scales\, with implications on s
 everal ecosystem services\, including a reassessment of the carbon footpri
 nt of hydropower. However\, most of the research on C cycling in inland wa
 ters has been conducted in permanently inundated ecosystems\, despite a la
 rge part of the world's inland waters is subject to occasional\, recurrent
  or even permanent drying. Information on carbon biogeochemical processes 
 in temporary waters is therefore scarce and there is a considerable knowle
 dge gap on the magnitude and drivers of greenhouse gas emissions from aqua
 tic ecosystems when they are dry. Recent estimates have shown very high an
 d dynamic CO2 emissions from the dry sediments of streams\, rivers\, ponds
 \, lakes and reservoirs. This is particularly relevant as inland waters ar
 e currently shrinking in many regions of the world due to alterations of t
 he water cycle promoted by a combination of climate change and direct huma
 n interventions. The consequences of drying on the functioning of inland w
 ater ecosystems extend beyond the water-land interface and imply major cha
 nges in the biogeochemical dynamics of these ecosystems at different tempo
 ral scales. research on this topic of “dry limnology” aims at includin
 g the dry phases of inland waters in our current understanding of inland w
 ater carbon budgets in order to identify potential implications for global
  carbon cycle feedbacks.\n\nShort biography:\nDr Biel Obrador is an ecosys
 tem ecologist specialized in carbon cycling in aquatic systems. With a PhD
  in Ecology by the University of Barcelona his current research aims at un
 derstanding how aquatic ecosystem functioning responds to local and global
  drivers\, using carbon biogeochemistry as a proxy. His research topics in
 clude ecosystem-level understanding of aquatic metabolism\, greenhouse gas
  emissions and biogeochemical transformation of dissolved organic carbon i
 n river networks\, and inorganic carbon burial in lake and reservoir sedim
 ents. Most of his research has focused on temporary ecosystems\, as perfec
 t environments to study the biogeochemical dynamics of aquatic-terrestrial
  interfaces.
LOCATION:ZOOM https://epfl.zoom.us/j/84677261593
STATUS:CONFIRMED
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