β Scribed by P. K. Gupta; M. C. Pant
No coin nor oath required. For personal study only.
Certain parameters of the zoobenthos community structure, viz., population density, species richness, diversity, dominance and similarity indices in the inshore area (0-1 m stratum) of Lake Naini Tal were examined during 1978-1979. Significznt changes in community structure were found both in space and time. A classification applied on similarity index values of the data from different sampling occasions showed two clusters of species-winter and summer clusters. Similar analysisof the sample data from different sites suggeated three clusters of species for polluted water, clean water and intermediate sites. I t is suggested that variation in the benthos community structure over the season is primarily related to temperature, availability of food and life cycle pattern, while its variation in space is related to sediment texture and degree of pollution.
References
π SIMILAR VOLUMES
A total of thirty tttxa of benthic macroinvertebrates were collected from Lake Nixini Tal ( m i l = 48 ha, mean depth= 16.2 m) situated 1937 m above sea-level in the Kumaun Rcgion of thc Himalayit. Of these, Chiranomus plumosus and Tubifex tubifex were namerically dominant, whilr Vivipnrus benyalens
Species composition and periodicity of phytoplankton were studied in relation to various physieo-chemical pmameters over a period of 18 months in the two basins of Lake Sat Tal. Taxonomic analysis led t o 54 species. Phytoplankton density in the euphotic zone ranged from 0.33 >( lo5 t o 4.12 x 105 c
In the most productive macrophytes stand lying within the littoral zone of Lake Naini Tal (a Kumaun Himalayan Lake, located 1937 m above sea level) the macrophytic biomass was removed a t the time of peak biomass one year, but not during the next. The effect of non-removal of the macrophytes was app
A comprehensive study of phyto-and zooplankton and macrozoobenthic components in Lake Xainital showed that species richness was high for plankton and low for macrozoobenthos. The algal biomass was dominated by greens (54 O/") and blue-greens (31 4"), the zooplankton population by copepods (84 O/o),