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| DOI | 10.1016/j.geodrs.2022.e00602 |
| Altitude and slope aspects as the key factors affecting the change of C:N:P stoichiometry in the leaf-litter-soil system of alpine timberline ecotones of the Sygera Mountains in Southeast Tibet, China | |
| He, Peng; Lu, Jie; Ren, Yihua; Li, Jiangrong; Hou, Lei; Deng, Xiangsheng; Gao, Tan; Cheng, Fei | |
| 发表日期 | 2023 |
| ISSN | 2352-0094 |
| 卷号 | 32 |
| 英文摘要 | Understanding the altitudinal distribution patterns of ecological stoichiometry is essential for understanding biogeochemical processes in mountainous forests. However, the changes in ecological stoichiometry throughout the leaf-litter-soil system on the different slope aspects in mountainous forests ecosystems are not fully under-stood. To fill these gaps, we examined the altitudinal patterns of C:N:P stoichiometry in the leaf-litter-soil system and nutrient resorption of dominant tree species in the alpine timberline ecotones on the sunny and shady slopes of the Sygera Mountains in Southeast Tibet, China. Three timberline plants were selected: Sabina saltuaria (S. saltuaria), Abies georgei (A. georgei) and Rhododendron aganniphum (R. aganniphum). The C, N, and P contents and C:N:P stoichiometry of R. aganniphum in the leaf and foliar litter varied widely along the altitudes, and those of soil showed similar trends. The leaf C:N of R. aganniphum, soil C, and soil C:N on the sunny slope increased with increasing altitudes. Furthermore, the N and P contents in the leaf and foliar litter of timberline plants on the shady slope were significantly higher than those on the sunny slope, whereas the C, C:N, C:P, and N:P ratios in the leaf and foliar litter exhibited the opposite trend. R. aganniphum had the highest nitrogen resorption ef-ficiency (NRE) and phosphorus resorption efficiency (PRE), whereas A. georgei had the lowest. The PRE of R. aganniphum increased with increasing altitudes, which may be driven by the soil C:N ratio. According to leaf N: P ratios and the relative resorption hypothesis, the leaf N:P ratio was 5.55, 8.70 and 2.86 corresponding to NRE equal to PRE for S. saltuaria, A. georgei and R. aganniphum, respectively. It suggests that the timberline ecotones plants in this study were P-limited, although this limitation may not be responsible for the formation of tim-berlines in the the Sygera Mountains. Varying degrees of correlations exist between element contents, stoichi-ometry ratios and nutrient resorption efficiency. Overall, our results revealed that altitude and slope aspects are the key factors affecting the change of C:N:P stoichiometry in the leaf-litter-soil system. |
| 关键词 | CNP stoichiometryLeaf-litter-soil systemNutrient resorptionAlfisolsTimberline ecotones |
| 英文关键词 | N-P RATIOS; NUTRIENT RESORPTION; CARBON-DIOXIDE; NITROGEN; TREELINE; LEAVES; GROWTH; ELEVATION; TEMPERATURE; LIMITATION |
| WOS研究方向 | Soil Science |
| WOS记录号 | WOS:000923906700001 |
| 来源期刊 | GEODERMA REGIONAL
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/282935 |
| 作者单位 | Tibet Agriculture & Animal Husbandry University; Tibet Agriculture & Animal Husbandry University; Guangxi University |
| 推荐引用方式 GB/T 7714 | He, Peng,Lu, Jie,Ren, Yihua,et al. Altitude and slope aspects as the key factors affecting the change of C:N:P stoichiometry in the leaf-litter-soil system of alpine timberline ecotones of the Sygera Mountains in Southeast Tibet, China[J],2023,32. |
| APA | He, Peng.,Lu, Jie.,Ren, Yihua.,Li, Jiangrong.,Hou, Lei.,...&Cheng, Fei.(2023).Altitude and slope aspects as the key factors affecting the change of C:N:P stoichiometry in the leaf-litter-soil system of alpine timberline ecotones of the Sygera Mountains in Southeast Tibet, China.GEODERMA REGIONAL,32. |
| MLA | He, Peng,et al."Altitude and slope aspects as the key factors affecting the change of C:N:P stoichiometry in the leaf-litter-soil system of alpine timberline ecotones of the Sygera Mountains in Southeast Tibet, China".GEODERMA REGIONAL 32(2023). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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