• Dr. Shalini, B. R
• Dr. Murulidhara, V. N

Monitoring and ecological assessment of fresh water ecosystems such as tanks is crucial as they provide plentiful services and wealth to aquatic biota and human. Wetlands are characterised by variations in depth and inundation time hence, it is difficult to make use of invertebrates as biological indicators. In such cases Diatoms, as they are microscopic, widely distributed with few habitat boundaries respond rapidly to environmental changes may be used for monitoring of fresh water ecosystems such as tanks. Therefore, the present study aimed to enumerate the Diatom community structure of two fresh water tanks situated in the foot hills of rural settlements of Koratagere in the state of Karnataka. Water samples for the examination of physico-chemical characters and enumeration of Diatomic population were collected from both the tanks during January 2020 to December 2020. Standard methodologies were fallowed during collection, preservation and analysis. From the results it is clear that the tanks had moderate Diatom diversity and periodicity. Total of 19 species were identified with seasonal maxima observed during summer and that of minimum during rainy. Diversity of Diatoms between the tanks exhibited narrow difference. Most pollution tolerant species such as Cocconeis placentula, Navicula cuspidata, Navicula cryptocephala, Melosira granulata and Synedra ulna were recorded in the present studies. Though the concentration of chemical parameters and nutrient elements found to be low, the presence of pollution tolerant species is an indicative of eutrophic nature of the tanks, hence need to introduce conservational strategies for balanced and sustainable ecosystem

Tanks, Physico-chemical, Diatoms, Enumeration, Diversity, Periodicity

"DIATOM COMMUNITY STRUCTURE IN ECOLOGICAL ASSESSMENT OF TWO FRESHWATER TANKS OF KORATAGERE, KARNATAKA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 6, page no.i220-i226, June-2023, Available :http://www.jetir.org/papers/JETIR2306824.pdf

"DIATOM COMMUNITY STRUCTURE IN ECOLOGICAL ASSESSMENT OF TWO FRESHWATER TANKS OF KORATAGERE, KARNATAKA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 6, page no. ppi220-i226, June-2023, Available at : http://www.jetir.org/papers/JETIR2306824.pdf