Leaf carbon isotope and mineral composition in subtropical plants along an irradiance cline |
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| Authors: | J R Ehleringer C B Field Zhi-fang Lin Chun-yen Kuo |
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| Institution: | (1) Department of Biology, University of Utah, 84112 Salt Lake City, UT, USA;(2) Department of Plant Biology, Carnegie Institution of Washington, 94305 Stanford, CA, USA;(3) Academia Sinica, South China Institute of Botany, Guangzhou, People's Republic of China |
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| Abstract: | Summary Leaf carbon isotope ratios and leaf mineral composition (Ca, K, Mg, Mn, N, and P) were measured on the dominant species along an irradiance cline in a subtropical monsoon forest of southern China. This irradiance cline resulted from disturbance caused by fuel-harvesting. Leaf carbon isotope ratios increased from undisturbed to disturbed sites for all species, indicating that leaf intercellular CO2 concentrations decreased and leaf water use efficiencies increased along this cline. Nitrogen and magnesium levels were lower in leaves of species on the disturbed sites, but there were no clear patterns for calcium, potassium, phosphorus or manganese.C.I.W.D.P.B. Publication no 932 |
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| Keywords: | Water-use efficiency Nutrient-use efficiency Photosynthesis Human impact 13C/12C ratios |
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