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Seasonal variation of benthic macro invertebrates from Tons River of Garhwal Himalaya Uttarakhand

Seasonal variation of benthic macro invertebrates from Tons River of Garhwal Himalaya Uttarakhand

Pakistan Journal of Biological Sciences: Pjbs 16(22): 1510-1516

ISSN/ISBN: 1028-8880

PMID: 24511693

Present investigation was carried out to assess the seasonal variation of benthic macro-invertebrates from the Tons river, a tributary of Yamuna River in Garhwal Himalaya, Uttrakhand during December, 2007 to November, 2009. The seasonal benthic diversity was correlated with various physic-chemical parameters which documented that the macrobenthic diversity is mostly regulated by the dissolved oxygen in the water while temperature and free CO2 were found to be inversely correlated with the benthic fauna. Maximum diversity of benthos was reported at the upstream site ('H' 0.204) during the winter season while it was recorded minimum during the rainy season at all the sites. Maximum diversity is reported during the winter season at all the sites. The benthic fauna is represented by three phylum, 4 classes and 10 orders with Insecta emerging as the most dominant class. Maximum genera were reported from midstream site as it acts as ecotone between upstream and downstream.

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Accession: 055678748

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