Riederer, M; Pausch, J; Kuzyakov, Y; Foken, T: Partitioning NEE for absolute C input into various ecosystem pools by combining results from eddy-covariance, atmospheric flux partitioning and 13CO2 pulse labeling, Plant Soil, 390, 61-76 (2015) | |
Abstract: The complexity of ecosystem processes, especially under continuously changing environmental conditions, requires high resolution insight into ecosystem carbon fluxes. It is essential to gain not only information about relative carbon balance and fluxes (common for partitioning studies), but also in absolute mass units. To evaluate absolute fluxes in belowground carbon pools, eddy covariance and stable isotope labeling were coupled in a 21 day experiment in summer 2010. Eddy covariance based net ecosystem exchange was measured on extensively managed grassland and separated into underlying assimilation and ecosystem respiration by a carbon flux partitioning model. Resultant CO2 assimilation served as absolute carbon input into the ecosystem that was further partitioned by applying the relative carbon distribution in subsidiary pools, gained by 13C pulse labeling and tracing. In doing so, the mean daily assimilation of –7.1 g C m–2 d–1 was partitioned into fluxes of 2.5, 0.8, 0.5, 2.3 and 1.0 g C m–2 d–1 into shoots, roots, soil, shoot respiration and CO2 efflux from soil, respectively. Finally, it was concluded that the approach is suitable as an upgrade for both, atmospheric flux measurements and isotopic partitioning methods. |
Fr. 01.07.2022 3. Bayerische Biodiversitätstage in Bayern 2022 |
BayCEER-Kolloquium: |
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Do. 30.06.2022 Postponed to WS 22/23: Plant diversity in a changing world: from individuals to communities |
Ökologisch-Botanischer Garten: |
Mi. 29.06.2022 Führung | "Klimawandel: Neue Bäume braucht die Stadt" |
So. 03.07.2022 Führung | "Mäusedorn und Katzenschwanz: Katzen und Botanik" |
So. 03.07.2022 Ausstellungseröffnung | "Natur und Kunst" - Malerei und Graphik von Christel Gollner |