title: Leaf carbon isotope and mineral composition in subtropical plants along an irradiance cline.
abstract: 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 CO2concentrations 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.
authors.affiliation: Department of Biology, University of Utah, 84112, Salt Lake City, UT, USA.
authors.forename: J R
authors.initials: JR
authors.lastname: Ehleringer
authors.affiliation: Department of Plant Biology, Carnegie Institution of Washington, 94305, Stanford, CA, USA.
authors.forename: C B
authors.initials: CB
authors.lastname: Field
authors.affiliation: Academia Sinica, South China Institute of Botany, Guangzhou, People's Republic of China.
authors.forename: Zhi-Fang
authors.initials: ZF
authors.lastname: Lin
authors.affiliation: Academia Sinica, South China Institute of Botany, Guangzhou, People's Republic of China.
authors.forename: Chun-Yen
authors.initials: CY
authors.lastname: Kuo
keywords: 13C/12C ratios; Human impact; Nutrient-use efficiency; Photosynthesis; Water-use efficiency