Impact of water quality parameters on aquatic insect fauna of Majuli river island, Assam, India

Aim: To study the diversity of aquatic insects and establish correlation between key water quality parameters and aquatic insect diversity in selected aquatic systems of Majuli island. Methodology: Fixed plot surveys covering 25 sampling sites under 5 aquatic systems viz., water bodies with dense, f...

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Bibliographic Details
Published in:Journal of environmental biology 2021-03, Vol.42, p.333-342
Main Authors: Borkataki, S, Bhattacharyya, B, Medhi, B K, Bhagawati, S
Format: Article
Language:English
Subjects:
Aquatic animals
Aquatic ecosystems
Aquatic environment
Aquatic fauna
Aquatic insects
Aquatic populations
Bicarbonates
Biodiversity
Bioindicators
Biomonitoring
Caustic soda
Correlation coefficient
Correlation coefficients
Creeks & streams
Dissolved oxygen
Diversity indices
Dominant species
Environmental science
Fluorides
Indicator species
Insects
Mathematical analysis
Monsoons
Natural streams
Parameters
Polyvinyl alcohol
Population
River ecology
Sodium
Soil sciences
Species diversity
Streams
Submerged plants
Vegetation
Water area
Water quality
Water quality standards
Wind
Winter
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Summary:Aim: To study the diversity of aquatic insects and establish correlation between key water quality parameters and aquatic insect diversity in selected aquatic systems of Majuli island. Methodology: Fixed plot surveys covering 25 sampling sites under 5 aquatic systems viz., water bodies with dense, floating and submerged vegetation (S1), seasonal natural streams (S2), periodically managed streams (S3), open water areas completely devoid of vegetation (S4) and water areas near brick industry (S5) were carried out seasonally. Species diversity indices were calculated. Standard protocols were followed to estimate the key physico-chemical water quality parameters. Correlation coefficient was computed to establish significant correlations. Results: Study revealed the presence of 7692 numbers of aquatic insect belonging to 6 orders and 19 families. Highest and lowest mean population was observed in S4 during monsoon and S5 during winter. Ranatra sp. was found to be the dominant species during pre-monsoon and winter from S2. The highest value of diversity indices was recorded during monsoon from S4 whereas the lowest value was observed in S5 during winter. Significant positive correlation (p
ISSN:0254-8704
2394-0379
DOI:10.22438/eb/42/2(SI)/SI-223