5 Kogami H, Hanba Y, Kibe T, et al. CO2 transfer conductance, leaf structure and carbon isotope composition of Polygonum cuspidatumleaves from low and high altitudes. Plant Cell Enviro, 2001, 24: 529-538??
[2]
6 Zhu Y, Siegwolf R T W, Durka W, et al. Phylogenetically balanced evidence for structural and carbon isotope responses in plants along elevational gradients. Oecologia, 2010, 162: 853-863??
8 van de Water P K, Leavitt S W, Betancourt J L. Leaf δ13C variability with elevation, slope aspect, and precipitation in the southwest UnitedStates. Oecologia, 2002, 132: 332-343??
[5]
9 K?rner C. The use of ‘altitude’ in ecological research. Trends Ecol Evol, 2007, 22: 569-574??
[6]
1 Farquhar G D, Richards R A. Isotopic composition of plant carbon correlates with water-use efficiency of wheat genotypes. Funct PlantBiol, 1984, 11: 539-552
[7]
2 Condon A G, Richards R A, Rebetzke G J, et al. Improving intrinsic water-use efficiency and crop yield. Crop Sci, 2002, 42: 122-131??
[8]
3 Guo G, Xie G. The relationship between plant stable carbon isotope composition, precipitation and satellite data, Tibet Plateau, China. QuatInt, 2006, 144: 68-71
[9]
4 K?rner C, Farquhar G, Wong S. Carbon isotope discrimination by plants follows latitudinal and altitudinal trends. Oecologia, 1991, 88:30-40??
[10]
18 Jones H G. Plants and Microclimate. Cambridge: Cambridge University Press, 1983
[11]
19 O’Leary M. Carbon isotope fractionation in plants. Phytochemistry, 1981, 20: 553-567??
[12]
20 廖国藩, 贾幼玲. 中国草地资源. 北京: 中国科学技术出版社, 1996
[13]
21 Zhou Y, Fan J, Zhang W, et al. Factors influencing altitudinal patterns of C3 plant foliar carbon isotope composition of grasslands on theQinghai-Tibet Plateau, China. Alp Botany, 2011, 121: 79-90??
14 Schulze E, Turner N, Nicolle D, et al. Leaf and wood carbon isotope ratios, specific leaf areas and wood growth of Eucalyptus speciesacross a rainfall gradient in Australia. Tree Physiol, 2006, 26: 479-492??
[21]
15 Berry S L, Roderick M L. Gross primary productivity and transpiration flux of the Australian vegetation from 1788 to 1988 AD: Effects ofCO2 and land use change. Global Change Biol, 2004, 10: 1884-1898??
33 Hultine K R, Marshall J D. Altitude trends in conifer leaf morphology and stable carbon isotope composition. Oecologia, 2000, 123: 32-40??
[25]
34 Morecroft M D, Woodward F I. Experimental investigations on the environmental determination of δ13C at different altitudes. J Exp Bot,1990, 41: 1303-1308??
[26]
35 Li M C, Liu H Y, Li L X, et al. Carbon isotope composition of plants along altitudinal gradient and its relationship to environmental factorson the Qinghai-Tibet Plateau. Pol J Ecol, 2007, 55: 67-78
[27]
36 Schleser G, Helle G, Lucke A, et al. Isotope signals as climate proxies: The role of transfer functions in the study of terrestrial archives.Quat Sci Rev, 1999, 18: 927-943??
[28]
37 Li Y B, Chen T, Zhang Y F, et al. The relation of seasonal pattern in stable carbon compositions to meteorological variables in the leaves of Sabina przewalskii Kom. And Sabina chinensis (Lin.) Ant Environ Geol, 2007, 51: 1279-1284??
[29]
38 Loader N J, Hemming D L. Spatial variation in pollen δ13C correlates with temperature and seasonal development timing. Holocene, 2001,11: 587-592??
[30]
24 Zhao B, Kondo M, Maeda M, et al. Water-use efficiency and carbon isotope discrimination in two cultivars of upland rice during differentdevelopmental stages under three water regimes. Plant Soil, 2004, 261: 61-75??
[31]
25 Dungait J A J, Docherty G, Straker V, et al. Interspecific variation in bulk tissue, fatty acid and monosaccharide δ13C values of leaves from amesotrophic grassland plant community. Phytochemistry, 2008, 69: 2041-2051
[32]
26 Winkler F, Wirth E, Latzko E, et al. Influence of growth conditions and development on δ13C values in different organs and constituents ofwheat, oat and maize. J Plant Physiol, 1978, 87: 255-263
[33]
27 Hobbie E A. Intramolecular, compound-specific, and bulk carbon isotope patterns in C3 and C4 plants: A review and synthesis. New Phytol,2004, 161: 371-385
[34]
28 Leavitt S, Long A. Stable carbon isotope variability in tree foliage and wood. Ecology, 1986, 67: 1002-1010??
30 Cao S K, Feng Q, Si J H, et al. Relationships between foliar carbon isotope discrimination with potassium concentration and ash content ofthe riparian plants in the extreme arid region of China. Photosynthetica, 2009, 47: 499-509??
[37]
31 K?rner C, Farquhar G D, Roksandic Z. A global survey of carbon isotope discrimination in plants from high-altitude. Oecologia, 1988, 74:623-632??
[38]
32 Li C Y, Wu C C, Duan B L, et al. Age-related nutrient content and carbon isotope composition in the leaves and branches of Quercusaquifolioides along an altitudinal gradient. Trees-Struct Funct, 2009, 23: 1109-1121??
[39]
39 Saurer M, Siegenthaler U, Schweingruber F. The climate carbon isotope relationship in tree rings and the significance of site conditions.Tell Ser B-Chem Phys Meteorol, 1995, 47: 320-330??
[40]
40 Zheng S, Shangguan Z. Spatial patterns of foliar stable carbon isotope compositions of C3 plant species in the Loess Plateau of China. EcolRes, 2007, 22: 342-353
[41]
41 Sheu D, Chiu C. Evaluation of cellulose extraction procedures for stable carbon isotope measurement in tree ring research. Int J EnvironAnal Chem, 1995, 59: 59-67??
[42]
42 Morecroft M D, Woodward F I, Marrs R H. Altitudinal trends in leaf nutrient contents, leaf size and δ13C of Alchemilla alpina. Funct Ecol,1992, 6: 730-740
[43]
43 Llorens L, Osborne C P, Beerling D J. Water-use responses of ‘living fossil’ conifers to CO2 enrichment in a simulated Cretaceous polarenvironment. Ann Bot, 2009, 104: 179-188??