流溪河和潖江河从化段浮游植物群落结构研究

2007年9月至2008年9月对广州流溪河和琶江河从化段浮游植物进行周年调查,分析其种类组成、细胞数量、优势种类组成、种类多样性等群落结构特征及其季节变化。广州流溪河和琶江河从化段浮游植物种类丰富,共鉴定了隶属于90属的218种（包含变种和变型）,其中绿藻为优势种类,共31属92种,占总种类数的42.20%。浮游植物细胞数量的变化范围是5.1～2090×103cell/L之间,平均值为152×103cell/L,最高值出现在春季,最低值出现在夏季。多样性H’指数较高,各站平均值变化范围为1.03～4.22,丰富度的变化范围为1.00～7.83,均匀度变化范围为0.63～0.85。多样性指数的最高值都出现在夏季,最低值出现在冬季。

Structural Characteristics of Phytoplankton in Liuxi and Bajiang River, China

From Sep.2007 to Sep.2008,structural characteristics,including species composition,cell abundance,dominate species,Shannon-Wiener index and seasonal variations,of freshwater phytoplankton were investigated in the main rivers and reservoirs of Liuxi and Bajiang River.In total,218 species belonging to 90 genera were identified.Chlorophyta species were the most common organisms,with 92 species belonging to 31 genera found,which accounted for 42.20% of total species.Cell abundance varied from 5.1 to 2090×103 cell/L with an annual average was 152×103 cell/L.Maximum cell abundance occurred in spring and minimum presented in summer.The Shannon-Wiener index fluctuated from 1.03 to 4.22,the Margalef index fluctuated from 1.00 to 7.83,and the Pielou index fluctuated from 0.63 to 0.85.Diversity peaked in summer and was lowest in winter.