高寒草甸不同草地群落物种多样性与生产力关系研究

生态系统的结构和功能、生物多样性与生产力的关系问题是近年来群落生态学中研究的中心问题,其中,生态系统生产力水平是其功能的重要表现形式,用4种不同草地类型探讨自然群落的物种多样性与生产力关系.结果表明,矮嵩草草甸、小嵩草草甸和金露梅灌丛群落中物种多样性与生产力的关系呈线性增加关系,藏嵩草沼泽化草甸群落中线性增加关系不显著,这表明群落生产力除受物种多样性的影响外,也受物种本身特征和环境资源的影响.不同的环境资源和环境异质性是形成群落结构特征、物种多样性分布格局差异的主要原因之一.

Relationship between species diversity and productivity in four types of alpine meadow plant communities

The relationship between species diversity and ecosystem function is one of the core problems on biodiversity research.Productivity is an important modality of ecosystem function.The species diversity of natural communities is often strongly related to their productivity.The grassland is an important component of the terrestrial ecosystems and plays a significant role in the biodiversity and ecosystem function's study.The relationship between species diversity and productivity of natural communities were studied on four alpine meadow types.The results showed that the species diversity-productivity pattern was linearly increase in Kobresia pygmaca meadow,K.humlis meadow,Potentilla froticosa shrub,while there was no significant linear relationship in K.tibetica of swamp meadow,which indicated that the species diversity of natural community could influence the productivity.At the same time,different environmental resource and environmental heterogeneity contributes to the productivity as well,which form discrepant structural characteristics of community and distribution of species diversity.