Stream Biogeochemistry Lab

Dept. of Limnology and Bio-Oceanography | University of Vienna

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Dept. of Limnology & Bio-Oceanography
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Ongoing Projects
    HYDRO-DIVERSITY - Soil-stream connectivity effects on diversity
    TRAISEN-FREQUENCY - The Effect of a Human Extreme Event on Stream Water Quality
Past Projects
    EXCARB - Influence of climate extremes on carbon dynamics
    INTERFACES - Ecohydrological interfaces as critical hotspots

EXCARB - Influence of climate extremes on carbon dynamics across the boundaries of aquatic ecosystems


The EXCARB project is headed by the Stream Biofilm and Biogeochmeistry Lab by Jakob Schelker and Tom Battin. Collaborators within the project are Georg Wohlfahrt from the University of Innsbruck, Günter Blöschl from the Vienna University of Technology, and Martin Kainz from the Wassercluster Lunz.

Abstract: Hydrological extremes are predicted to increase as climate change progresses and we may therefore expect more frequent droughts and floods. The implications of such hydrological extremes on the carbon cycle in inland waters remain poorly understood. The broad objective of EXCARB is to study possible effects of past, present and future hydrological extremes on carbon fluxes at catchment scale and across the boundaries of terrestrial, stream and lake ecosystems. EXCARB will pave the way to construct a predictive model of inland water carbon cycling according to climate projections for the European Alps. Based on historical hydrology records over the last 100 years, EXCARB will identify past hydrological extremes in a pre-alpine catchment, capture signatures of such extremes in lake sediments and establish a present-day carbon balance for a stream-lake continuum in that catchment. EXCARB will also relate these present-day carbon fluxes, including CO2 outgassing, to precipitation and discharge. Finally, a process-based model will encapsulate this ensemble of past and present-day information to help predict the effect of future climate projections on the carbon fluxes in pre-alpine aquatic ecosystems. EXCARB is an interdisciplinary project cutting across ecosystem boundaries that will provide essential knowledge that helps to better place streams and lakes as major players of the global carbon cycle.

The project is funded by the Austrian Acadamy of Sciences from 2015-2017.