Photosynthetica 2003, 41(1):43-48 | DOI: 10.1023/A:1025800226867

Natural Occurrence and Backwater Infection of C4 Plants in the Vegetation of the Yangtze Hydropower Three Gorges Project Region

R.Z. Wang1,*
1 Laboratory of Quantitative Vegetation Ecology, Institute of Botany, the Chinese Academy of Sciences, Xiangshan, Beijing, China

Natural occurrence of C4 species, life form, altitude pattern, and infection by the Three Gorges Project (TGP) were studied in the TGP region. 76 species (about 2.5 % of the total 2 685 vascular plant species in the region), in 6 families and 42 genera, were identified with C4 photosynthesis. 91 % of these C4 species belong to Monocotyledoneae, e.g. Cyperaceae (14 species), Gramineae (54 species), and Commelinaceae (1 species). Of these C4 species, Gramineae was the leading C4 family: 54 C4 grass species (71 % of the total C4 species), about 36 % of the total grasses, were identified in the TGP region. 98 % C4 species was found in therophyte (55 %) and hemicryptophyte (43 %). This is consistent with high grass and sedge compositions in the region. Most habitats of more than a half of these C4 species (65 %) will be submerged permanently, but no species will be endangered or extinct, because 95 % C4 species can be found from 500 to 800 m above sea level. The abundance of some C4 species will be dropped due to the reduction of distribution scope. It will take a long-term to explore the effects of the TGP on plants, vegetation, and environment.

Additional key words: altitude pattern; geophytes; hemicryptophytes; life form; therophytes

Published: March 1, 2003  Show citation

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Wang, R.Z. (2003). Natural Occurrence and Backwater Infection of C4 Plants in the Vegetation of the Yangtze Hydropower Three Gorges Project Region. Photosynthetica41(1), 43-48. doi: 10.1023/A:1025800226867
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