期刊
JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE
卷 173, 期 5, 页码 644-653出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jpln.200900209
关键词
carbon stocks; organic carbon; Donau-Auen National Park; fluvial ecosystems; riparian forest
资金
- Deutsche Forschungsgesellschaft (DFG) [LA 1398/4]
- Technische Universitat Berlin
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
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