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Phytoplankton diversity in relation to physico-chemical environmental variables of Nachiketa Tal, Garhwal Himalaya

R. Sharma,V. Tiwari

Published 2018 in Unknown venue

ABSTRACT

Lakes are the important natural resources present on the Earth. These are the type of productive ecosystem important for any geographical region, as they play significant role in its ecological stability.1 The Nachiketa Tal is an important lake of Garhwal Himalaya. This lake is surrounded by dense forest of Querecus, Abies, Rhododendron and Myrica, etc. and receives its water from the watershed. The variations and distribution of phytoplankton in freshwater lake depend on its physiochemical features.2 Phytoplanktons are the primary producer and play a vital role in food chain of aquatic ecosystem.3,4 Due to this reason, phytoplanktons are usually used as an ecological indicator to assess the ecological health and the stress effects of chemical contaminants on aquatic ecosystems and they are also necessary to sustain a healthy aquatic ecosystem.5‒8 Dynamics in the phytoplankton biomass are the result of the complex interaction of physical, chemical and biological processes. The availability of nutrients influences the diversity of the phytoplankton. From the past few decades, there is much interest to study various factors influencing the development of phytoplankton in relation to the physico-chemical attributes.9‒12 Changes in the phytoplankton community of different types of lakes also assessed the trophic status and environmental quality of the lakes. Algae (Phytoplankton) are photoautotrophic organisms having chlorophyll ‘a’ and unicellular reproductive structures. It is highly diverse group, which are important for aquatic habitats.13

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