Carbon stocks of soil and vegetation on Danubian floodplains

authored by: Arne Cierjacks, Birgit Kleinschmit, Maren Babinsky, Fritz Kleinschroth, Arvid Markert, Markus Menzel, Ulrike Ziechmann, Theresa Schiller, Markus Graf, Friederike Lang
Abstract: Riparian forests are assumed to play a crucial role in the global carbon cycle. However, little data are available on C stocks of floodplains in comparison to other terrestrial ecosystems. In this study, we quantified the C stocks of aboveground biomass and soils of riparian vegetation types at 76 sampling sites in the Donau-Auen National Park in Austria. Based on our results and a remotely sensed vegetation map, we estimated total C stocks. Carbon stocks in soils (up to 354 t ha^-1 within 1 m below surface) were huge compared to other terrestrial ecosystems. As expected, soils of different vegetation types showed different texture with a higher percentage of sandy soils at the softwood sites, while loamy soils prevailed at hardwood sites. Total C stocks of vegetation types were significantly different, but reflect differences in woody plant biomass rather than in soil C stocks. Mature hardwood and cottonwood forests proved to have significantly higher total C stocks (474 and 403 t ha^-1, respectively) than young reforestations (217 t ha^-1) and meadows (212 t ha^-1). The C pools of softwood forests (356 t ha^-1) ranged between those of hardwood/cottonwood forests and of reforestations/meadows. Our study proves the relevance of floodplains as possible C sinks, which should be increasingly taken into account for river management. Furthermore, we conclude that plant-species distribution does not indicate the conditions of sedimentation and soil C sequestration over the time span of interest for the development of soil C stocks.
External Organisation(s): Technische Universität Berlin
Type: Article
Journal: Journal of Plant Nutrition and Soil Science
Volume: 173
Pages: 644-653
No. of pages: 10
ISSN: 1436-8730
Publication date: 10.2010
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Soil Science, Plant Science
Sustainable Development Goals: SDG 15 - Life on Land
Electronic version(s): https://doi.org/10.1002/jpln.200900209 (Access: Unknown)