Effects of sampling method on foliar delta C-13 of Leymus chinensis at different scales
文献类型：SCI/SSCI论文
| 作者 | Liu Y. J.; Li, Y.; Zhang, L. R.; Xu, X. L.; Niu, H. S. |
| 发表日期 | 2015 |
| 关键词 | Environmental variability field experiment sampling error temperate steppes transect carbon-isotope discrimination water-use efficiency net primary productivity inner-mongolia rainfall gradient biomass allocation natural-abundance patterns plants china |
| 英文摘要 | Stable carbon isotope composition (C-13) usually shows a negative relationship with precipitation at a large scale. We hypothesized that sampling method affects foliar C-13 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 C-13 values of all samples were measured. We compared the patterns that foliar C-13 to precipitation among different years or different sample sizes, the differences of foliar C-13 between grazed and fenced grassland. Whether actual annual precipitation (AAP) or mean annual precipitation (MAP), it was strongly correlated with foliar C-13 every year. Significant difference was found between the slopes of foliar C-13 to AAP and MAP every year, among the slopes of foliar C-13 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 C-13 and precipitation. Furthermore, there was significant lower foliar C-13 value in presence of grazed type than fenced type grassland. These findings provide evidence that there is significant effect of sampling method to foliar C-13 and its response pattern to precipitation of L. chinensis. Our results have valuable implications in methodology for future field sampling studies. |
| 出处 | Ecology and Evolution |
| 卷 | 5 |
| 期 | 5 |
| 页 | 1068-1075 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 2045-7758 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38743]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Liu Y. J.,Li, Y.,Zhang, L. R.,et al. Effects of sampling method on foliar delta C-13 of Leymus chinensis at different scales. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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