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How does the propagule bank contribute to cyclic vegetation change in a lakeshore marsh with seasonal drawdown?
Liu, Gui-hua; Li, W.; Zhou, J.; Liu, W.; Yang, D.; Davy, A.J. (2006). How does the propagule bank contribute to cyclic vegetation change in a lakeshore marsh with seasonal drawdown? Aquat. Bot. 84(2): 137-143. https://dx.doi.org/10.1016/j.aquabot.2005.08.005
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522
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| Trefwoorden |
China, People's Rep.
Ecological succession
Flooding
Water > Fresh water
Water bodies > Inland waters > Wetlands
China [Marine Regions]
Zoet water |
| Auteurs | | Top |
- Liu, Gui-hua
- Li, W.
- Zhou, J.
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- Liu, W.
- Yang, D.
- Davy, A.J.
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| Abstract |
Lakeshore marshes around Liangzi Lake, in the middle reach of the Yangtze River, China, experience annual changes of water level of c. 1.5 m. During the drawdown period, the vegetation is structured by helophytes and emergents; during the rainy season when the dams are closed (June–September) the marshes are flooded and their vegetation rapidly changes to be come dominated by submerged, floating-leaved and tall emergent species. The species composition and abundance of both the marsh seed bank and the vegetative propagule bank were compared with those of the drawdown and flooded vegetation types. These data provided a test of the predictive power of van der Valk's model of northern temperate seasonal vegetation change in a subtropical, freshwater wetland with cyclic vegetational change. The abundant species were detected in the propagule bank. The seed bank was found to determine the species richness of both types of the vegetation, whereas the vegetative propagule bank consisted of the dominants of the drawdown vegetation. Water depth conditions, and the composition of seed and vegetative propagules banks together determine the structure of the standing vegetation during drawdown and flooding. van der Valk's succession model was found to predict the seasonal vegetation change reasonably well. The Chi-square test showed no significant difference between predicted vegetation and actual vegetation in both drawdown and flooding periods. |
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