Senthilkumar R, Sivakumar K
Department of Botany, Directorate of Distance Education, Annamalai University, Annamalainagar-608 002, India.
J Environ Biol. 2008 Sep;29(5):747-52.
The phytoplankton samples were collected from the Veeranam lake for a period of one year from March-2005 to February-2006. The physico-chemical parameters of water such as air-temperature, water temperature, pH, salinity, dissolved oxygen, electrical conductivity and total dissolved solids were observed and their ranges were: 30.1-36.5 degrees C, 29.0-34.4 degrees C, 7.9-8.4, 1.2-2.5 mgl(-1), 7.6-9.2 microS and 2.5-5.2 mgl(-1). Totally 160 species of phytoplankton belonging to different taxonomic groups were identified. Among these 74 species to belong to Bacillariophyceae, 43 species to Chlorophyceae, 38 species to Cyanophyceae and 5 species to Euglenophyceae. The phytoplankton density was high (1705 cells l(-1)) during the summer season and low (760 cells l(-1)) during the winter season. Bacillariophyceae formed the dominant group. Species diversity index (H'), species richness (SR) and species evenness (J') were calculated.
2005年3月至2006年2月期间，从韦拉纳姆湖采集浮游植物样本，为期一年。观测了水温、气温、pH值、盐度、溶解氧、电导率和总溶解固体等水体理化参数，其范围分别为：30.1 - 36.5摄氏度、29.0 - 34.4摄氏度、7.9 - 8.4、1.2 - 2.5毫克/升、7.6 - 9.2微西门子和2.5 - 5.2毫克/升。共鉴定出160种不同分类群的浮游植物。其中，硅藻门74种，绿藻门43种，蓝藻门38种，裸藻门5种。浮游植物密度在夏季较高（1705个/升），冬季较低（760个/升）。硅藻门为优势类群。计算了物种多样性指数（H'）、物种丰富度（SR）和物种均匀度（J'）。
