期刊
SCIENCE IN CHINA SERIES D-EARTH SCIENCES
卷 52, 期 11, 页码 1714-1723出版社
SCIENCE PRESS
DOI: 10.1007/s11430-009-0170-4
关键词
Mount Gongga; carbon isotopic ratios; C-3/C-4 plants; C-4 distribution; altitude
资金
- National Natural Science Foundation of China [40673017]
Variations in carbon isotopic ratios (delta C-13) of C-3 plants and distribution of C-4 plants were investigated along an altitudinal transect on the eastern slope of Mount Gongga, and the environmental effects on them were discussed. It is shown that plants with C-4 photosynthetic pathway mainly occur at altitudes below 2100 m a.s.l., suggesting that the low summer temperature is responsible for the distributional pattern. In addition, delta C-13 of C-3 plants increases with elevation at the region above 2000 m a.s.l. with the characteristics of humid climate, and the increase rate in delta C-13 for C-3 plants is about 1.3%. per kilometer. Temperature determines the altitudinal trend of delta C-13.
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