Studies on phytoplankton diversity in response to abiotic factors in Veeranam lake in the Cuddalore district of Tamil Nadu.
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.
Senthilkumar
R
R
Department of Botany, Directorate of Distance Education, Annamalai University, Annamalainagar-608 002, India.
Sivakumar
K
K
D044822:Biodiversity; D004553:Electric Conductivity; D005618:Fresh Water / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007194:India; D010100:Oxygen / Q000032:analysis; D010802:Phylogeny; D010839:Phytoplankton / Q000145:classification* / Q000502:physiology / Q000648:ultrastructure; D012621:Seasons; D012965:Sodium Chloride / Q000032:analysis; D013696:Temperature
D012965:Sodium Chloride; D010100:Oxygen