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Drought effects on carbon and water exchange in three mediterranean ecosystems : a combined top-down and bottom-up analysis of eddy covariance and sapflow data

Title data

Reichstein, Markus:
Drought effects on carbon and water exchange in three mediterranean ecosystems : a combined top-down and bottom-up analysis of eddy covariance and sapflow data.
Bayreuth : Bayreuther Inst. für Terrestrische Ökosystemforschung , 2001 . - II, 150 p. - (Bayreuther Forum Ökologie ; 89 )
( Doctoral thesis, 2001 , Universität Bayreuth, Fakultät für Biologie, Chemie und Geowissenschaften)

Abstract in another language

Drought is an important factor influencing ecological processes in a large portion of the world's ecosystems. It is anticipated that in many of these ecosystems climatic change will not only imply increased temperatures and CO2 concentrations but also enhanced drought stress. In the current study, which evolved as a part of the EU project MEDEFLU, drought effects on ecosystem-atmosphere car-bon dioxide and water exchange are observed with eddy covariance and sap-flow techniques and examined via top-down, bottom-up and inverse modelling approaches in three Mediterranean woody ecosystems. It is shown that current models do not adequately describe drought effects on soil/ecosystem respiration and canopy function and lead to considerable errors when calculating ecosystem carbon balances. Thus, new model formulations are proposed and confirmed by the observed data. Incorporating these approaches in landscape, regional and global models is suggested after further testing. This will improve predictions of future carbon balances in regions influenced by drought, an area which makes up more than 40% of the terrestrial surface.

Further data

Item Type: Doctoral thesis
Additional notes: BAYCEER7540
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Former Professors
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Ecology
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 22 Oct 2015 07:29
Last Modified: 07 Mar 2016 08:28
URI: https://eref.uni-bayreuth.de/id/eprint/20657