信阳南湾水库消落带植物群落结构分析

Analysis of Plant Community Structure in the Riparian Zone of Nan wan Reservoir in Xinyang

采取野外典型取样调查法,在信阳南湾水库消落带上选取受周边环境影响最小的3处地方作为采样点,每处采样点划分为低水位高程(95~100 m)和高水位高程(100~105 m)2处采样区域,开展植物群落调查,研究了信阳南湾水库消落带的植物群落结构。结果表明:在信阳南湾水库消落带共发现34种植物,隶属于14科31属,其群落结构简单、物种多样性较低、生态较为脆弱;低水位高程以一年生草本植物为主要优势物种,高水位高程以多年生草本植物为主要优势物种;依据重要值分析,菊科、禾本科、豆科植物占南湾水库消落带主要位置。

To study the plant community structure in the riparian zone of Nanwan Reservoir in Xinyang,three places least affected by the surrounding environment were selected as sampling points.Each sampling point is divided into two sampling areas:low water level elevation(95-100 m)and high water level elevation(100-105 m)to carry out plant community investigation.Through investigation,34 species of plants were found in Nanwan Reservoir,belonging to 14 families and 31 genera,with simple community structure,low species diversity and fragile ecology.The main dominant species of low water level elevation is annual herbaceous,and perennial herb is the main dominant species of high water level elevation.Compositae,Gramineae and Leguminosae occupy the main position of the riparian zone according to the important value analysis.