Vegetable niche of enclosed grassland in Yanchi county of Ningxia
LI Rui-；Zhang-Ke-Bin-；Zhang-Sheng-Yang-；Yang-Xiao-Hui-；Jiao-Feng
1.College of Soil and Water Conservation,Beijing Forestry University,100083, Beijing;2.Yanchi Mechanical Forestry Centre in Ningxia,751500,Yanchi,Ningxia;3.Institute of Forest Sciences,Chinese Academy of Forestry,100091,Beijing: China
Abstract：In order to find the vegetable niche pattern in arid and semi-arid grassland region,the niche breadth and niche overlapping in Yanchi county of Nixia in 2002 and 2003 are measured by means of Levins niche breadth and Pianka niche overlapping indexes of enclosed grassland.The results showed that,the biological and ecological characteristics of Artemisia capillaris Thunb determined its predominant station in this(region),and its niche breadth in 2002 and 2003 were bigger than other species(0.758 and 0.868) continuing to keep rising trend.The results of niche overlapping in 2002 and 2003 also showed that the species with big niche breadth didn't always have big niche overlapping,and the niche breadth and niche overlapping did not have a positive direct linear relation.The higher Pianka niche overlapping in 2002 and 2003 both appeared in the species with low niche breadth,which showed from another point of view that environment and resources have high spatial heterogeneity during the vegetation restoration process.
李瑞1；张克斌1；张生英2；杨晓晖3；乔峰1. 宁夏盐池人工封育草原植物生态位研究[J]. 中国水土保持科学, 2006, 4(1): 49-54.
LI Rui-；Zhang-Ke-Bin-；Zhang-Sheng-Yang-；Yang-Xiao-Hui-；Jiao-Feng. Vegetable niche of enclosed grassland in Yanchi county of Ningxia. SSWCC, 2006, 4(1): 49-54.
2006, Vol. 4 
