青藏高原高寒草地植物多样性测定的最小样地面积  

Minimum plot size for estimating plant biodiversity of the alpine grasslands on the Qinghai-Tibetan Plateau

作　　者：董世魁[1] 汤琳[1] 王学霞[1] 刘颖慧[2] 刘世梁[1] 刘全儒[3] 吴娱[1] 李媛媛[1] 苏旭坤[1] 赵晨[1] 

机构地区：[1]北京师范大学环境学院,北京100875 [2]北京师范大学资源学院,北京100875 [3]北京师范大学生命科学学院,北京100875

出　　处：《生物多样性》2013年第6期651-657,共7页Biodiversity Science

基　　金：国家"十二五"科技支撑项目(2012BAC01B02);环保部环保公益项目(201209033)

摘　　要：为科学设定青藏高原地区草地植物多样性研究的样地面积,提高研究结果的精确性,本研究拟合研究了7种模型,分别筛选出高寒草甸、高寒草原和高寒荒漠3种草地类型的最优拟合模型,并基于种–面积曲线计算各类草地植物多样性估测的适宜样地面积。结果表明:(1)非饱和曲线模型较适宜拟合青藏高原地区的种–面积关系;(2)3类高寒草地健康样地的最小面积均大于退化样地;(3)对于高寒草甸,健康样地和退化样地的最小面积分别为108 m2和82 m2;对于高寒草原,健康样地和退化样地的最小面积分别为130 m2和81 m2;对于高寒荒漠,健康样地和退化样地的最小面积分别为60 m2和41 m2。To determine the appropriate plot size for estimating plant diversity of different types of alpine grassland on the Qinghai-Tibetan Plateau （QTP）, i.e. alpine meadow, alpine steppe and alpine desert, seven models were applied in the examination of species-area relationships. Depending on the optimal species-area relationship curves, the minimum sizes of sampling plot for each type of grassland under healthy and de- graded conditions were obtained. The findings were as follows： （1） Non-saturation curve models were most suitable for describing species-area relationships of alpine grasslands on the QTP; （2） For all three types of alpine grassland, the minimum plot size for healthy grasslands was larger than that for degraded ones; （3） Minimum plot sizes for estimating plant diversity were 108 m2 and 82 m2, respectively, for healthy and de- graded alpine meadow, 130 m2 and 81 m2, respectively, for healthy and degraded alpine steppe, and 60 m2 and 41 m2, respectively, for healthy and degraded alpine desert.

关 键 词：青藏高原 高寒草地 种-面积曲线 最小样地面积 

分 类 号：S812[农业科学—草业科学]