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Carbon isotope composition of plants along altitudinal gradient and its relationship to environmental factors on the Qinghai-Tibet Plateau

Autorzy
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Distribution pattern of [delta][^13]C values of plateau plants and their responses to environment along altitudinal gradients were investigated. In the growing season of 2003 (June-August), stable carbon isotope ratios ([delta][^13]C) of 174 plant samples belonging to 89 species of 20 families and 58 genera along the gradient 2800-4400 m (above sea level) was studied in six sites on the east edge of Qinghai-Tibet Plateau. The results indicated that the range of [delta][^13]C values of plants is narrow from -30.2[per mil] to -25.2[per mil], which means that none of the species examined belonged to C[4] photosynthetic pathway and all of these species performed C[3] photosynthetic pathway. The average [delta][^13]C values of plants at 6 sites were positively correlated to altitude (r = 0.974, P <0.01). The results revealed that site-averaged [delta][^13]C values were negatively correlated with temperature (r = 0.907, P <0.05) as well as CO[2] partial pressure (r = 0.940, P <0.01). The combination of these two factors account for 80% of the variation of [delta][^13]C values (r[^2] = 0.859, P <0.01). Varying precipitation with increasing altitude does not affect the plant [delta][^13]C values (r = 0.469, P> 0.05) as well as the sunlight duration(r = 0.630, P> 0.05).
Rocznik
Strony
67--78
Opis fizyczny
Bibliogr. 24 poz.,Rys., tab.,
Twórcy
autor
  • Institute of Tibetan Plateau Research, Chinese Academy of Sciences, l8 Shuangqing Road, Haidian District, Beijing, 100085, P.R. China
Bibliografia
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  • 6. Farquhar G.D., O’Leary M.H., Berry J.A. 1982 – On the relationship between carbon isotope discrimination and the intercellular carbon dioxide concentration in leaves - Aust. J. Plant Physiol. 9: 121–137.
  • 7. Farquhar G.D., Wong S.C. 1984 – An empirical model of stomatal conductance – Aust. J. Plant Physiol. 11: 191–210.
  • 8. Feng H.Y., An L.Z., Chen T. 2003 – The relationship between foliar stable carbon isotope composition in Pedicularis L. and environment factors – J. Glaciol. Geocryol. 25: 88–93.
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  • 11. Guillemette M., Stephen J.B. 2001 – Carbon isotopes in Ombrogenic peat bog plants as climatic indicators: calibration from and altitudinal transect in Switzerland – Organic Geochemistry, 32: 233–245.
  • 12. Hamerlynck E.P., Huxman T.E., McAuliffe J.R., Smith S.D. 2004 – Carbon isotope discrimination and foliar nutrient status of Larrea tridentate(creosote bush) in contrasting Mojave Desert soils – Oecologia, 138: 210–215.
  • 13. Hirota M., Tang Y.H., Hu Q.W., Kato T., Mo W.H., Cao G.M., Mariko S. 2004 – Methane emissions from different vegetation zones in a Qinghai-Tibetan Plateau wetland - Soil. Bio. Chem. 36: 737–738.
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  • 15. Li X.B., Chen J.F., Zhang P.Z., Liu G.X. 1999 – The Characteristics of carbon isotope composition of modern plants over Qinghai-Tibet Plateau (NE) and its climatic information - Acta Sedimentologica Sin. 17: 325–330.
  • 16. Ma J.Y., Chen T., Qiang W.Y., Wang G. 2005 – Correlations between foliar stable carbon isotope composition and environmental factors in desert plant Reaumuria soongorica(Pall.) Maxim – J. Integrat. Plant Bio. 47: 1065–1073.
  • 17. McCarroll D., Pawellek F. 2001 – Stable carbon isotope ratios of Pinus sylvestris from northern Finland and the potential for extraction a climate signal from long Fennoscandian chronologies – Holocene, 11: 517–526.
  • 18. Morecroft M.D., Woodward F.I., Marrs R.H. 1990 – Experimental investigations on the environmental determination of δ13C at different altitudes – J. Exp. Bot. 41: 1303–1308.
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  • 22. Robertson I., Rolfe J., Switsur V.R., Carter A.C., Hall M.A., Barker A.C., Waterhouse J.S. 1997 – Signal strength and climate relationships in 13C/12C ratios of tree ring cellulose from oak in southwest Finland Geophys. Res. Lett. 24: 1487–1490.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BGPK-1617-6225
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