Surveying macro-invertebrate diversity in the Tons river,Doon Valley,India |
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Authors: | Ramesh C Sharma Reena Arambam Rekha Sharma |
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Institution: | (1) Department of Environmental Sciences, H.N.B. Garhwal University, Post Box 67, Srinagar-Garhwal, Uttarakhand, 246174, India |
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Abstract: | A survey of macro-invertebrates and their monthly variations occupying the Tons river in Doon Valley was conducted from August
2003–July 2004. Macro-invertebrate collections and water samples were taken from three sampling stations every month during
the period of study. All the hydrological attributes were measured monthly for 1 year. The present study showed that the water
velocity, hydromedian depth, turbidity and dissolved oxygen and nature and size of the bottom substrates do play a major role
in determining the macro-invertebrate diversity of Tons river. The ecological relevance of the measured hydrological attributes
was investigated by comparing their degree of correlation with invertebrate density and diversity. The Shannon–Wiener index
(H′) of macro-invertebrates was found to be highest (3.60) during spring season (February and March) and lowest (2.59) during
monsoon season (July and August). The high values of diversity index of macro-invertebrates at all the three sampling sites
indicate diverse macro-invertebrate communities in the Tons river in Doon Valley, India. |
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Keywords: | Macro-invertebrates Tons river Diversity index Doon Valley Uttarakhand |
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