【作者】 赵丽娅； 赵锦慧； 李海波； 赵哈林； 赵学勇；

【Author】 Li-Ya Zhao~(1**) Jin-Hui Zhao~1 Ha-Lin Zhao~2 Xue-Yong Zhao~2 (School of Resources and Environmental Science,Hubei University,No.11 Xueyuan Road,Wuhan, 430062,China,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,260 Donggang West Road,Lanzhou 730000,China)

【机构】 湖北大学资源环境学院； 中国科学院寒区旱区环境与工程研究所；

【摘要】 在科尔沁沙地,对3种退化沙地类型(流动、半流动、固定沙地)的植物群落进行取样,分析植物群落多样性与生产力的关系。结果表明,3种沙地植物群落中,多样性指数(Shannon-wienner指数、Simpson指数和Pielow均匀度指数)与生产力存在显著的相关关系,拟合函数关系为负二次函数曲线,即单峰型函数关系,说明研究区内相对高生产力的群落具有高物种多样性,固定沙地群落具有高生产力水平和高物种多样性倾向,而流动沙地群落具有低生产力水平和低物种多样性的倾向。更多还原

【Abstract】 In this paper,the relationship between the species diversity and the productivity of plant communities is researched by analyzing the samples collected from 3 degraded sandy habitats including the shifting sandland,the semi-shifting sandland and the fixed sandland in China.The study site is located in Horqin Sandy Land,approximately 10 km northeast of Naiman County,Inner Mongolia,China(42°55’ N, 120°41’ E),with an altitude approximately 360m above sea level.This area has a temperate continental semiarid monsoon climate,with windy and dry winters and springs,and warm and comparatively wet summers followed by short and cool autumns.The mean annual rainfall is 362 mm and rainfall is irregular and shows strong seasonal and annual variabiUty.The results show that,under the 3 habitats,there is a good regression between the quadratic relationship of 3 indexes(Shannon-Wiener index,Simpson index and Pielow evenness index) of species diversity and the productivity,which support the uni-model pattern.That is,the higher species diversity corresponds to higher level of productivity.更多还原