模拟增温对矮嵩草草甸莎草科功能群植物的影响

摘要

本论文以青藏高原矮嵩草草甸植物群落为主要研究对象，采用国际冻原计划（ITEX）模拟增温对植物影响的研究方法设置模拟增温样地，探讨了模拟增温对高寒矮嵩草草甸莎草科功能群植物的影响，结果表明，莎草科功能群植物的生物量随温度的逐渐升高先增大后减小；盖度在试验第一、二年均随温度的升高先增加后减小，在试验第三年盖度随温度的升高逐渐减小；植物高度随温度的升高逐渐增大；重要值在试验第一、二年随温度的升高先增大后减小，在试验第三年随温度的升高而逐渐增大。%The plant communities in alpine Kobresia humilis meadow as the main research object, we set the artificial warming and natural warming plots, and they based on the international tundra program ( ITEX ) simu- lation of temperature effect on plant research methods. The Responses of Cyperaceae Pb-Ts ( Plant Functional Type) plant to simulating warming in alpine Kobresia humilis meadow was discussed. The results showed that biomass of Cyperaceae PFTs plants increased at first with temperature increasing and then decreased. Coverage and important value of Cyperaceae PFTs plants increased at first with temperature increasing and then decreased in 2008, 2009, but it decreased with warming in 2010. Plant height increased with temperature increasing.