哈巴湖自然保护区人工封育草原生态位研究_苏鹏飞.pdfVIP

湖南农业科学 2011 ，（9）：144~147,151 Hunan Agricultural Sciences 哈巴湖自然保护区人工封育草原生态位研究 苏鹏飞，张克斌，刘 建，程中秋，王 晓，刘帅华 （北京林业大学水土保持学院，北京 100083） 摘 要： 运用Levins 生态宽度指数及Pianka 生态位重叠指数，对宁夏哈巴湖自然保护区人工封育草原2009 年及2010 年植物生 态位宽度及生态位重叠进行计量。结果表明：丝叶山苦荬生态位宽度在两年中均最大，分别为0.557 、0.530 ，是人工封育区的优势 种。此外，两年间封育区其它优势种也基本相同，分别为阿尔泰狗娃花、黑沙蒿、苦豆子。两年的生态位重叠计测结果均表明，生态 位宽度大的物种不一定和其它物种有大的重叠指数，即使生态位宽度较大的物种之间的重叠指数也不高。可见较大的生态位宽 度和较高的生态位重叠度之间并不存在直接的线性关系；2009 年、2010 年较高的Pianka 生态位重叠指数都出现在生态位宽度较 小的物种之间，这一现象从另外一个角度说明植被恢复过程中环境资源存在着高度的空间异质性。 关键词：哈巴湖；封育；草原；生态位宽度；生态位重叠 中图分类号：S812 文献标识码：A 文章编号：1006-060X （2011）09-0144-04 Study on Niche of Artificial Fencing Grassland in the Haba Lake Nature Reserve SU Peng-fei, ZHANG Ke-bin, LIU Jian, CHENG Zhong-qiu, WANG Xiao, LIU Shuai-hua (College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, PRC) Abstract: Using Levins index and Pianka index to calculate niche breadth and niche overlap of plant in artificial fencing grassland in the Haba Lake Nature Reserve in 2009 and 2010. The results showed that the niche breadth of Ixeris chinensis (Thunb.) Nakai in 2009 and 2010 were the largest, which were 0.577 and 0.530, respectively. So, Ixeris chinensis (Thunb.) Nakai is dominant species in the artificial fencing area. Besides, other dominant species in fencing area in 2009 and 2010 were almost the same, which were Heteropappus altaicus (Willd.) Novopokr, Artemisia ordosica Krasch. and Sophora alopecuroides Linn.. The results of two years niche overlap survey indicated that the species having large niche breadth didnt have big niche overlap index with the other species, even the niche overlap index between the species that had big nich