壶流河湿地自然保护区植被优势种群分布格局研究  

Patterns of Dominant Populations of Vegetation in Huliu River Wetland Nature Reserve,Shanxi

作　　者：陈浩[1] 张贵平[1] 连俊强[1] 张峰[1,2] 

机构地区：[1]山西大学黄土高原研究所,山西太原030006 [2]山西大学生命科学学院,山西太原030006

出　　处：《山西大学学报（自然科学版）》2010年第4期615-619,共5页Journal of Shanxi University(Natural Science Edition)

基　　金：山西省自然科学基金(2006011077);山西省留学基金(20060024);山西省软科学研究(2008041037-04)

摘　　要：根据野外调查的样方资料,应用方差/均值法(扩散系数)及其t检验、聚集指数、平均拥挤度、G reen指数、聚集强度、Poisson分布和负二项分布的χ2拟合检验等方法研究了山西壶流河湿地自然保护区植被优势种的分布格局并分析格局成因.结果表明:所研究的21个优势种均为聚集型分布格局,但它们的聚集强度有差异.种群聚集的强度最大的分别为野大豆、小香蒲和慈姑,种群聚集的强度最小的分别为水蓼、泽泻、水田芥,这主要与土壤水分以及植物本身的生殖生物学特征有关.在判定物种分布格局的方法中,以方差/均值比率、Poisson分布和负二项分布的χ2拟合检验联合运用效果较好.Based on the data set from the field,the patterns of dominant populations of wetland vegetation in Huliu River Wetland Nature Reserve in Shanxi were studied by using dispersal index, clump intensity, mean crowding, patchiness index, Green＇ s index, intensity index, χ2-test for fitting Poisson distribution and negative binomial distribution,respectively,and the cause involved with the pattern was analyzed. The re- sults showed that the patterns of those populations were all clumped,however,they were different in clump intensity,among which the species with the biggest of clump intensity were Glycine soja, Typha minima, and Sagittaria sagittisolia, and the species with the smallest of clump intensity were Polygonum hydropiper,Alisrna plantago-aquatica ,and Ca rdamine lyrata, respectively. The result is not only related to the soil moisture closely, but also to their reproductive characteristics. Among 8 methods being used to measure negative 2 the patterns, the application of variance/mean ratio and χ2-test for fitting Poisson distribution and binomial distribution together to pattern analysis were better than the others.

关 键 词：湿地植被 优势种 分布格局 壶流河流域 山西 

分 类 号：Q948[生物学—植物学]