Predicting the impact of grazing on vegetation structure, and thus on ecosystem services, is one of the main technical bottlenecks in alpine grassland conservation and management. However, past researches based on the fixed, discrete, and qualitative indicators limited our understanding for the effect of grazing on plant community assembly. Research based on the quantitative competitor, stress tolerator, and ruderal (CSR) theory increases the possibilities for analyzing this ecological process. To test the hypothesis that the dominant plant strategy in alpine meadow plant community will shift from S‐selection to R‐selection with increased grazing intensity, the plant community CSR strategy assemblies among the cold‐seasonal grazing meadows along a gradient of grazing intensity were studied on the eastern Tibetan Plateau. The dominant strategy concentrated in the S‐selected corner under the low grazing intensity, which provided a direct evidence to the environmental filters in the alpine area, and suggested that species of strong S‐selection should dominate the undisturbed alpine grassland plant community. The C‐selection of dominant strategies increased (R² = 0.431, p = 0.004), and the extent of S‐selection decreased with greater grazing intensity; however, the R‐selection of them only slightly increased under intermediate grazing intensity and finally decreased under high grazing intensity, reflecting a selective grazing disturbance combined with localized enrichment of soil that can provide microsites for the establishment of competitors. The strong C‐selected species may dominate the plant community on the eastern Tibetan Plateau in place of S‐selected and R‐selected species, if the grazing intensity is continually high.

中文翻译：

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青藏高原东部高寒草甸植物群落生态战略组装对牛放牧的响应。

预测放牧对植被结构的影响，进而对生态系统服务的影响，是高寒草原保护与管理的主要技术瓶颈之一。但是，过去基于固定，离散和定性指标的研究限制了我们对放牧对植物群落组装的影响的理解。基于定量竞争者，压力承受者和标竿（CSR）理论的研究增加了分析这种生态过程的可能性。为了检验假说，随着放牧强度的增加，高寒草甸植物群落的优势植物策略将从S选择转变为R选择，研究了不同季节放牧强度梯度下冷季放牧草甸植物群落的CSR策略组合。在青藏高原东部。优势策略集中在低放牧强度下的S选角，这为高寒地区的环境过滤提供了直接证据，并表明强S选种应主导不受干扰的高山草原植物群落。优势策略的C选择增加（R ²  = 0.431，p  = 0.004），随着放牧强度的提高，S选择的程度降低；然而，它们的R选择在中等放牧强度下仅略有增加，而在高放牧强度下最终降低，反映了选择性放牧干扰与土壤局部富集相结合，可为竞争者的建立提供微场所。如果放牧强度持续较高，则强C选择物种可能会在青藏高原东部的植物群落中占主导地位，而不是S选择和R选择物种。