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<p>In the present study, assemblages of benthic macroinvertebrates in Alaknanda River Catchment (ARC) at sites dominated by forest riparian land use (RLU) were investigated in Uttarakhand (India). The study aimed to examine the influence of land use patterns on in-stream physicochemical features and macroinvertebrate assemblages at five sampling sites with three distinct forested riparian zones i.e., Dense Mixed Forest (DMF), Chir-Pine Forest (CPF) and Open Mixed Forest (OMF). The benthic macroinvertebrate communities recorded during the study included 62 insect genera of 9 orders and 45 families along with 1 genus of each Crustacea and Annelida, and 2 taxa of Mollusca. The dominant insects at all sites were Trichoptera (16 genera) followed by Diptera (14 genera), Ephemeroptera (12 genera) and Plecoptera (8 genera). During different seasons the benthic macroinvertebrates density, diversity, richness and evenness was observed lowest during monsoon and summer; while, highest during spring and winter attributed to the seasonal variations in temperature, water level, oxygen and food. Sensitive invertebrate families of Trichoptera, Ephemeroptera, Plecoptera, and Odonata dominated with low water temperature while the tolerant families of Ephemeroptera, Diptera and Coleoptera were abundant in agricultural associated sites.</p>

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Assemblages of Benthic Macroinvertebrate Communities at Different Forested Riparian Land Use Sites in Alaknanda River Catchment, Uttarakhand (India)

  • 期刊论文

  • 发表日期：

    2026年5月6日

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  • Jitendra Singh Rana,
  • Manju Prakash Gusain,
  • Om Prakash Gusain

摘要

In the present study, assemblages of benthic macroinvertebrates in Alaknanda River Catchment (ARC) at sites dominated by forest riparian land use (RLU) were investigated in Uttarakhand (India). The study aimed to examine the influence of land use patterns on in-stream physicochemical features and macroinvertebrate assemblages at five sampling sites with three distinct forested riparian zones i.e., Dense Mixed Forest (DMF), Chir-Pine Forest (CPF) and Open Mixed Forest (OMF). The benthic macroinvertebrate communities recorded during the study included 62 insect genera of 9 orders and 45 families along with 1 genus of each Crustacea and Annelida, and 2 taxa of Mollusca. The dominant insects at all sites were Trichoptera (16 genera) followed by Diptera (14 genera), Ephemeroptera (12 genera) and Plecoptera (8 genera). During different seasons the benthic macroinvertebrates density, diversity, richness and evenness was observed lowest during monsoon and summer; while, highest during spring and winter attributed to the seasonal variations in temperature, water level, oxygen and food. Sensitive invertebrate families of Trichoptera, Ephemeroptera, Plecoptera, and Odonata dominated with low water temperature while the tolerant families of Ephemeroptera, Diptera and Coleoptera were abundant in agricultural associated sites.