山西沁河上游植物种间关系及功能群划分

Interspecific Relationship and Functional Groups Classification of Plants Species in the Upper Reaches of Qinhe River in Shanxi

采用系统随机取样法对沁河上游湿地草本植物进行调查,共取得420个样方,采用2×2列联表的χ2检验、联结系数(AC)和共同出现百分率(PC)测定了草本植物物种种间的联结性,并划分了沁河上游湿地植物功能群。结果表明,780个高频种对中,呈负相关性的种对多于呈正相关性的种对,大多数种对呈不显著相关;对40个草本植物高频种划分为4个功能群,分别为水生植物、湿生植物、中生植物、中旱生植物,各功能群沿水分梯度主要出现在沁河河道、季节性积水的沼泽地以及河漫滩、河滩地势较低处、河滩地势较高处等地方。

The systematic random sampling method is adopted to investigate the wetland herbaceous plant at the upstream of Qinhe river, with a total of 420 quadrats obtained, and chi-square test, association coefficient（AC）and the co-percentage of co-occurrence（PC）2×2 as shown in the contingency tables are used to measure the interspecific association of herbaceous plant species with the wetland plant functional groups at the upstream of Qinhe river also divided. The results show that among 780 high-frequency species pairs, those in negative correlation are more than those in positive correlation, and most species are not correlated significantly. 40 high-frequency species of herbaceous plants are divided into 4 functional groups, aquatic plants, hygrophytes, mesophyte,mesoxerophytes, which mainly appear along the riverway of Qinhe river, seasonal waterlogging wetland and flood plain, low-lying beach land, higher beach land, etc.