Photosynthetica 2002, 40(3):321-329 | DOI: 10.1023/A:1022623920812

Photosynthetic Pathways, Life Forms, and Reproductive Types for Forage Species Along the Desertification Gradient on Hunshandake Desert, North China

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

Floristic compositions, life forms, reproductive types for forage species, and their responses to desertification in Hunshandake desert were studied. 164 species, in 30 families and 94 genera, were identified with C3 (137 species), C4 (25 species), and CAM (2 species) photosynthesis. Of the 25 C4 species, 76 % were grasses and Chenopodiaceae species (hereafter chenopods). This suggests that the C4 species mainly occurred in a few families in the desert region. The reduction of C3 species and the increase of C4 species with desertification indicated that C4 species might have higher tolerance to environmental stresses (e.g. dry and poor soil). Relatively more hemicrytophyte and therophyte forms in the desert are related to the local temperate climate and vegetation dynamics. Relatively greater proportions of C4/C3 and clonal species/sexual species at mobile dune showed that the C4 species and clonal species could make greater contribution to sand land restoration in the Hunshandake desert.

Additional key words: C3, C4, and CAM photosynthesis; sexual and clonal reproductions

Published: September 1, 2002  Show citation

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Wang, R.Z. (2002). Photosynthetic Pathways, Life Forms, and Reproductive Types for Forage Species Along the Desertification Gradient on Hunshandake Desert, North China. Photosynthetica, 40(3), 321-329. doi: 10.1023/A:1022623920812
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