International Science Community Association International Research Journal of Environmental Sciences 2319 - 1414 1 5 2012 December 22 Study on Diversity, Taxonomy and Impact of Macrophytes on the Fresh Water Resources (Minor Project-Dam) of Yavatmal District, Maharashtra, INDIA 1 5 EN Joshi P.P. 1 Dept. of Zoology, Amolakchand Mahavidyalaya, Yavatmal, MS, Maharashtra, INDIA > Research Paper 2012 9 25 2012 December 22 The Macrophytes diversity in twenty two fresh water resources (Minor Project-dam) was studied during the year 2009-2010. Total twenty species of Macrophytes belonging to sixteen families were found in the Twenty two minor project, out of which Seven in Umerda, Nine in Kapra, Five in Zola, Eleven in Takli, Nine in Ghoti, Four in Majra, Eight in Antergaon, Ten in Pimpalkhuti, Ten in Eklara, seven in Shivni, Eight in Chorkhund, Eleven in Khandani, Five in Karanji, Seven in Singandov, Eight in Ner, Twelve in Kumbharkinhi, Seven in Hatola, Five in Etola, Nine in Devgaon, Seven in Mudana, Eight in Nignur and Six in Piranji. The following impacts were noticed. All the dams are seriously affected by unwanted growth of aquatic weeds. Many of these weeds are survive well in the new environments and grow at a fast rate. They compete with native vegetation which can lead to ecological shifts and also affect the quality of water. They increase water loss through absorbs and transpire more water by evapotranspiration. They were reducing the storage, conveyance capacity of dams and Impede recreational activities like swimming, fishing and boating. They may also cause physico-chemical changes like reduction in oxygen levels and present gaseous exchange with water resulting in adverse fish production. They can provide a favorable and protected habitat for disease vectors mainly the insects. The rapid spread of aquatic weeds in the dam’s vegetative and other means is creating serious socio-economic problems. Depending on the species and abundance of these weeds it is often necessary to control them. Aside from the aesthetic value of a well kept pond, an over abundance of weeds can create a hazard for aquatic life, offensive odors, breeding grounds for mosquitoes, and a hindrance to water sports. So the management of weeds is important. Immediate action should be taken by the authority for to improving the availability of dam water which is mainly used for pisiculture and irrigation purposes by Taluka (where the dam is constructed) of Yavatmal District. Copyright@ International Science Community Association