International Science Community Association International Research Journal of Biological Sciences 2278 - 3202 6 9 2017 09 10 A study on relation between phytoplankton and heavy metal pollution in Dravyavati River, Jaipur, India 15 21 EN Samir Derouiche 1 Department of Cellular and Molecular Biology, Faculty of natural sciences and life, ElOued University, El-Oued 39000, El-Oued, Algeria Zeghibe Khaoula 2 Department of Cellular and Molecular Biology, Faculty of natural sciences and life, ElOued University, El-Oued 39000, El-Oued, Algeria Gharbi Safa 3 Department of Cellular and Molecular Biology, Faculty of natural sciences and life, ElOued University, El-Oued 39000, El-Oued, Algeria Khelef Yahia 4 Department of Cellular and Molecular Biology, Faculty of natural sciences and life, ElOued University, El-Oued 39000, El-Oued, Algeria Priyanka Sharma 1 Faculty of Agricultural Sciences, SGT University, Gurgaon-122505, Delhi-NCR, India Nilima Bhardwaj 2 Department of Botany, Government College, Kota-324001, Rajasthan, India Ritu Singh Rajput 1 Department of Botany, JECRC University, Ramchandrapura, Sitapura Industrial Area, Jaipur-303905, Rajasthan, India Sonali Pandey 2 Department of Botany, JECRC University, Ramchandrapura, Sitapura Industrial Area, Jaipur-303905, Rajasthan, India Seema Bhadauria 3 Department of Microbiology, JECRC University, Ramchandrapura, Sitapura Industrial Area, Jaipur-303905, Rajasthan, India > Research Paper 2017 7 30 2017 09 10 Adverse consequences are the result when polluting contaminants are introduced into a natural environment. Water pollution is usually the result of untreated discharges of sewage, industrial effluent, oil spills and agricultural pesticides. Human activity involved in toxic metals processing and manufacturing of organic pollutants has dramatically increased contaminant levels in aquatic systems and soils. Algae normally occur in fresh water, and some species thrive in saltwater. Algae are valuable monitors of conditions in an ecosystem because they are exceptionally responsive to changes in water chemistry and tolerant of the variety of conditions; both the assortment of species and their density reflect the prevailing water conditions. Algae also play a role in the purification of wastewater because they can absorb a variety of harmful substances in their cells. Chief among these are heavy metals, organic and inorganic toxic substances, pesticides, excess nitrogen and radioactive materials. Copyright@ International Science Community Association