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  Year: 2017 | Volume: 7 | Issue: 1 | Page No.: 1-11
DOI: 10.3923/ecologia.2017.1.11
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Effective Stream Health Assessment: Soil Microbes Versus Aquatic Insects

Sankarappan Anbalagan , Vimalanathan Arunprasanna , Mani Kannan , Sundaram Dinakaran and Muthukalingan Krishnan

Objective: The present study was examined the reliability of stream soil bacteria and aquatic insect communities as indicators of stream health in three streams located in catchments ranging from pristine to impacted streams. Methodology: The 16S rDNA analysis was used to characterize the bacterial communities in stream soil and for comparison aquatic insects were collected. Results: Individual rarefaction analysis showed a significant relationship between the richness of bacterial taxa and sampling sites. In contrast, the perplexed result observed in aquatic insects that human impacted site had low rarefaction value. The differences in the evenness of bacterial and aquatic insect communities were detected by similarity indices. Unlike to aquatic insects, seasonality was not influenced the bacterial communities. We could identify the key factors influencing bacterial and aquatic insect assemblages by correspondence analysis. The result of indicator species analysis (IndVal) for each species of soil bacteria and aquatic insects indicates that an unimpacted site had the highest value. Conclusion: These findings highlight that the stream soil bacterial and aquatic insect communities respond differently to anthropogenic impacts and the assessment of stream soil bacteria provides an alternative indicators of stream health with less effort.
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How to cite this article:

Sankarappan Anbalagan, Vimalanathan Arunprasanna, Mani Kannan, Sundaram Dinakaran and Muthukalingan Krishnan, 2017. Effective Stream Health Assessment: Soil Microbes Versus Aquatic Insects. Ecologia, 7: 1-11.

DOI: 10.3923/ecologia.2017.1.11






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