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Role of Depth, Habitat and Current Velocity on Distribution of Benthic Macroinvertebrate Fauna in the Himalayan River, Ramganga

Role of Depth, Habitat and Current Velocity on Distribution of Benthic Macroinvertebrate Fauna in... Distributional pattern of benthic macroinvertebrate fauna were studied with respect to depth, velocity and habitat in a Himalayan river, the Ramganga. Total 8 sites were selected in four different sections; upper section (S1, S2), middle section (S3, S4), lower section (S5, S6) and mouth section (S7, S8). The total density of the benthic macroinvertebrate community increased with increasing depth from low (7 cm) to high (45 cm) in the riffle habitat at S1 and S2, while at S3 and S4 density decreased with increasing depth in same habitat. However, in the run habitat, density decreased with increase of depth from S5 to S8. Taxonomic richness of benthic macroinvertebrate fauna increased with enhancing depth in all habitats at stations S1 and S2, but reverse condition was observed from S3 to S8. The assemblages indicated relationship with depth, habitat and current velocity at each station. Leptoceridae was an indicator taxon at high depth at S1 both in the riffle and rapid habitats. Polycentropodidae–Hydropsychidae were indicator taxa at both low and high depths in the run habitat. Polycentropodidae–Leptophlebiidae were indicator taxa at medium depth in the same habitat. Chironomidae was indicator taxon in pool habitat in all depth as well as run habitats from S3 to S8. Principal component analysis (PCA) identified varied characteristic taxa with respect to depth, habitat and velocity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Proceedings of the Zoological Society Springer Journals

Role of Depth, Habitat and Current Velocity on Distribution of Benthic Macroinvertebrate Fauna in the Himalayan River, Ramganga

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Publisher
Springer Journals
Copyright
Copyright © Zoological Society, Kolkata, India 2022
ISSN
0373-5893
eISSN
0974-6919
DOI
10.1007/s12595-022-00447-0
Publisher site
See Article on Publisher Site

Abstract

Distributional pattern of benthic macroinvertebrate fauna were studied with respect to depth, velocity and habitat in a Himalayan river, the Ramganga. Total 8 sites were selected in four different sections; upper section (S1, S2), middle section (S3, S4), lower section (S5, S6) and mouth section (S7, S8). The total density of the benthic macroinvertebrate community increased with increasing depth from low (7 cm) to high (45 cm) in the riffle habitat at S1 and S2, while at S3 and S4 density decreased with increasing depth in same habitat. However, in the run habitat, density decreased with increase of depth from S5 to S8. Taxonomic richness of benthic macroinvertebrate fauna increased with enhancing depth in all habitats at stations S1 and S2, but reverse condition was observed from S3 to S8. The assemblages indicated relationship with depth, habitat and current velocity at each station. Leptoceridae was an indicator taxon at high depth at S1 both in the riffle and rapid habitats. Polycentropodidae–Hydropsychidae were indicator taxa at both low and high depths in the run habitat. Polycentropodidae–Leptophlebiidae were indicator taxa at medium depth in the same habitat. Chironomidae was indicator taxon in pool habitat in all depth as well as run habitats from S3 to S8. Principal component analysis (PCA) identified varied characteristic taxa with respect to depth, habitat and velocity.

Journal

Proceedings of the Zoological SocietySpringer Journals

Published: Sep 1, 2022

Keywords: Chironomidae; Current velocity; Depth; Habitat; Himalaya; Simuliidae

References