甘肃省放牧措施对高寒草地资源稳定性的影响

Effects of Grazing Measures on the Stability of Alpine Grassland Resources in Gansu Province

本研究以甘肃省碌曲县的高寒草甸为研究对象,综合3年数据分析了不同干扰强度下高寒草甸植物群落的物种多样性、功能多样性、功能冗余和群落稳定性变化趋势。研究结果表明,随着放牧强度增加,Margalef丰富度指数、Shannon-wiener多样性指数、Simpson优势度指数、Pielou均匀度、功能多样性、功能冗余和群落稳定性呈先增加而后降低的变化趋势;Margalef丰富度指数、Shannon-wiener多样性指数、Simpson优势度指数、Pielou均匀度在中度放牧强度下达到最大值,功能多样性、功能冗余和群落稳定性在轻度放牧强度下达到最大值;Margalef丰富度指数、功能多样性和群落稳定性对年份具有明显响应。适度的放牧强度有利于高寒草甸,且需要根据不同的需求制定出相应的放牧管理措施。

This study took the alpine meadow in Luqu County,Gansu Province as the research object,and integrated three-year data to analyze the species diversity,functional diversity,functional redundancy,and community stability change trends of the alpine meadow plant community under different disturbance intensities.The results of the study showed that with the increase of grazing intensity,Margalef richness index,Shannon-wiener diversity index,Simpson dominance index,Pielou uniformity,functional diversity,functional redundancy and community stability increased first and then decreased.Margalef richness index,Shannon-wiener diversity index,Simpson dominance index,Pielou uniformity reach the maximum under moderate grazing intensity,and functional diversity,functional redundancy and community stability reach the maximum under light grazing intensity Value.Margalef richness index,functional diversity and community stability have a clear response to the year.It shows that moderate grazing intensity is beneficial to alpine meadows,and corresponding grazing management measures need to be formulated according to different needs.