壶流河流域湿地植被优势种间关系分析

Analysis on Interspecific Relationships of Dominant Populations of Wetlands in Huliu River Watershed,Shanxi

根据野外70个样方的调查数据,运用2×2列联表的χ2检验方法、Pearson相关系数和Spearman秩相关系数检验,研究了山西壶流河流域湿地植被33种优势种,共528个种对的种间关联和相关关系。结果表明:χ2检验有209个种对呈正相关,其中极显著正相关种对16个(n=70,p<0.01),显著正相关种对21个(n=70,p<0.05),共占总对数的7.01%;317个种对呈负相关,其中显著负相关种对3个(n=70,p<0.05),占总对数的0.57%;2个种对不相关,正负相关比为0.6593,显著种对共占总对数的4.54%;Pearson相关分析中极显著相关的种对有20个(n=70,p<0.01),显著相关的种对有11个(n=70,p<0.05),全部为正相关,共占总对数的5.87%;Spearman秩相关系数检验207个种对呈正相关,其中极显著的种对有34个(n=70,p<0.01),正相关显著的种对有22个(n=70,p<0.05),共占总对数的10.61%,321个种对呈负相关,负相关显著的种对16个(n=70,p<0.05),占总对数的3.03%,正负相关比为0.6448,显著种对占总对数的7.20%,群落优势种种间多呈不显著关联。按照33个优势种对环境的适应方式和主导生态因素,它们被划分为3个生态种组:水烛生态种组(Typha group)、鹅绒委陵菜生态种组(Potentilla group)和赖草生态种组(Leymus group)。

Many different methods are used to explore the interspecific relationship, including X^2 -test for 2×2 contingency tables, Pearson＇s correlation coefficient test and Spearman＇ s rank correlation coefficient test, etc. But there are less research using the quantitative data in researching interspecies relationship, as well as analyzing the inter-species interaction mechanism. In recent decades along with the developing of the quantitative ecology theory and the methods, the interspecies relationship research has much distinct progress.There are various kinds of wetlands, including Xiahewan reservoir, Zhentouhe reservoir, flooding plain and so on, and they have rich biodiversity in Huliu River watershed, Shanxi. Based on the data of 70 plots investigated in the field, the interspecific relationship among 33 dominant populations of the communities , that is 528 species-pairs, of wetlands in Huliu River watershed, Shanxi was studied by usingX^2 -test for 2×2 contingency tables, Pearson＇ s correlation coefficient test and Spearman＇ s rank correlation coefficient test respectively. The results showed that 209 species-pairs were positive association and 317 species-pairs were negative association, while 2 species-pairs were none association by X^2 -test. The ratio of positive and negative association were 0.659 3. 21 species-pairs were significant positive association, and 3 species-pairs were significant negative association, and the number of species-pairs being significant （ n = 70, p 〈 0.05 ） made accounted for 4.54% in the total species-pairs by X^2-test. 16 species-pairs were higher significant positive association, which accounted for 3.03 % in the total species-pairs by X^2 - test. 20 species-pairs were higher significant （n=70,p〈0.01）, while 11 species-pairs were significant （n= 70,p〈0.05） by Pearson＇s correlation coefficient, and all of them were positive correlation. 207 species-pairs were positive correlation, which accounted for 10.61% in the total species-pairs by Spearman＇s rank correlation coefficient. 34 species-pairs were higher significant positive correlation and 22 species-pairs were significant positive correlation. 321 species-pairs were negative correlation, which accounted for 3.03 % in the total species-pairs by Spearman＇s rank correlation coefficient, including 16 species-pairs of significant negative correlation. The ratio of positive and negative association were 0.644 8, and the species-pairs being significant （n= 70,p〈0.05） accounted for 7.20%, and the interspecific relationships was not significant in the most dominants of this community by rank correlation coefficient test. According to the plants and environment, 33 species were divided Spearman ＇ s adaptability to the environment and the relationships between into 3 ecological species groups： Typha group, Leymus group and Potentilla group.