青海湖流域典型草地物种丰富度与生产力的关系  

Relations between plant species richness and community productivity of typical grasslands in Qinghai Lake basin

作　　者：武彦朋[1] 陈克龙[1] 张斐[1] 曹广超[1] 刘志杰[1] 苏茂新[1] 

机构地区：[1]青海师范大学生命与地理科学学院,西宁810008

出　　处：《生态学杂志》2011年第7期1449-1453,共5页Chinese Journal of Ecology

基　　金：国家社会科学基金项目(08XJY012);国家自然基金项目(40761010;40861026);青海省科技厅项目(2010-Z-276;2007-Z-604)资助

摘　　要：通过2009—2010年青海湖流域的样地实测数据,研究了不同尺度物种丰富度与生产力的关系,并初步探讨了其形成机制。结果表明：青海湖流域典型草地物种丰富度与生产力的关系在小尺度上（群落内和群落间）表现为线性正相关、负相关,在大尺度上（区域）则以单峰相关为主。沼泽草甸和高寒草甸的物种丰富度随生产力的增加而降低,高寒草原和温性草原的物种丰富度随生产力的增加而增加。在整个研究区内则表现为单峰型相关。研究还表明,研究区群落生产力的变化范围为65-585 g·m^-2·a^-1,物种丰富度为2-9种;生产力从高到低的顺序为沼泽草甸〉高寒草甸〉高寒草原〉温性草原。The relationship between plant species diversity and primary productivity is a hot topic in biodiversity research.Based on the 2009-2010 observation data from the sampling sites in Qinghai Lake basin,this paper studied the relations between the plant species richness and community productivity of typical grasslands in the basin at different scales.At small scales（within and between plant communities）,the relations were linear positive or negative,i.e.,for alpine steppe and temperate steppe,the species richness increased with increasing productivity,but for swamp meadow and alpine meadow,the species richness decreased with increasing productivity.At large scale（whole basin）,the relations were mainly in single-peak type.In the basin,the species richness was from 2 to 9,and the community productivity ranged in 65-585 g·m^-2·a^-1.Swamp meadow had the highest community productivity,followed by alpine meadow,alpine steppe,and temperate steppe.

关 键 词：物种丰富度 群落生产力 尺度 

分 类 号：Q948.1[生物学—植物学]