Effects of sampling method on foliar δ13C of Leymus chinensis at different scales

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2015
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Zhang, Lirong
Xu, Xingliang
Niu, Haishan
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http://nbn-resolving.de/urn:nbn:de:bsz:352-0-286180
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https://doi.org/10.1002/ece3.1401
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Ecology and Evolution. 2015, 5(5), pp. 1068-1075. eISSN 2045-7758. Available under: doi: 10.1002/ece3.1401
Zusammenfassung

Stable carbon isotope composition (δ13C) usually shows a negative relationship with precipitation at a large scale. We hypothesized that sampling method affects foliar δ13C and its response pattern to precipitation. We selected 11 sites along a precipitation gradient in Inner Mongolia and collected leaves of Leymus chinensis with five or six replications repeatedly in each site from 2009 to 2011. Additionally, we collected leaves of L. chinensis separately from two types of grassland (grazed and fenced) in 2011. Foliar δ13C values of all samples were measured. We compared the patterns that foliar δ13C to precipitation among different years or different sample sizes, the differences of foliar δ13C between grazed and fenced grassland. Whether actual annual precipitation (AAP) or mean annual precipitation (MAP), it was strongly correlated with foliar δ13C every year. Significant difference was found between the slopes of foliar δ13C to AAP and MAP every year, among the slopes of foliar δ13C to AAP from 2009 to 2011. The more samples used at each site the lower and convergent P-values of the linear regression test between foliar δ13C and precipitation. Furthermore, there was significant lower foliar δ13C value in presence of grazed type than fenced type grassland. These findings provide evidence that there is significant effect of sampling method to foliar δ13C and its response pattern to precipitation of L. chinensis. Our results have valuable implications in methodology for future field sampling studies.

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570 Biowissenschaften, Biologie
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Environmental variability, field experiment, sampling error, temperate steppes, transect
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ISO 690LIU, Yanjie, Yan LI, Lirong ZHANG, Xingliang XU, Haishan NIU, 2015. Effects of sampling method on foliar δ13C of Leymus chinensis at different scales. In: Ecology and Evolution. 2015, 5(5), pp. 1068-1075. eISSN 2045-7758. Available under: doi: 10.1002/ece3.1401
BibTex
@article{Liu2015Effec-31387,
  year={2015},
  doi={10.1002/ece3.1401},
  title={Effects of sampling method on foliar δ<sup>13</sup>C of Leymus chinensis at different scales},
  number={5},
  volume={5},
  journal={Ecology and Evolution},
  pages={1068--1075},
  author={Liu, Yanjie and Li, Yan and Zhang, Lirong and Xu, Xingliang and Niu, Haishan}
}
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