呼伦贝尔草原群落生产力与物种多样性关系分析

在呼伦贝草原选取5种代表性草原群落类型,采用取样调查的方法,探讨自然状况下草原植被群落生产力与物种多样性的关系,旨在为草原生态系统功能的恢复和草原有效管理提供理论依据.研究结果表明:大针茅+糙隐子草群落、羊草+克氏针茅群落、克氏针茅+羊草群落和贝加尔针茅+羊草群落多样性指数(物种丰富度指数、Simpson指数和Shannon-Winner指数)与生产力均呈显著正相关关系,但是羊草+寸草苔草甸草原物种多样性指数与生产力没有显著性相关关系.群落生产力受物种多样性、物种组成和环境因子等多因素共同影响,不仅仅是由物种多样性决定.

Analysis on the relationship between the species diversity andthe productivity of plant communities in the Hulunbeier Grassland

The relationship between the species diversity and the productivity of plant community was researched by analyzing the samples collected from 5 different typical grassland communities in Hulunbeier Grassland, in order to provide theoretical basis for the function recovery of grassland ecosystem and the effective management of Hulunbeier Grassland.The results showed:a significant positive correlation was found for Stipa grandis+Kengia squarrosa community, Leymus chinensis+ Stipa kryrowii community, Stipa kryrowii+ Leymus chinensis community and Stipa baicalensis+ Leymus chinensis community between species diversity indices (Species richness index, Simpson index and Shannon-Winner index) and the productivity of plant community, except for Leymus chinensis+Carex duriuscula community.The productivity of plant community was determined by many factors like species composition, environment factors, species diversity, not only by species diversity.