What question did this study set out to answer?

To evaluate the ecological mechanisms linking human-induced environmental pressures to water quality degradation and algal community shifts across a Himalayan river catchment.

August 16, 2026Environmental Science and Pollution ResearchOpen Access

Anthropogenic drivers of algal regime shifts in a Himalayan watershed and pathways for nature-based solutions

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Authors

BPBHAWNA PANDEYUttarakhand Seva Nidhi Paryavaran Shiksha Sansthan NCN. ChandraG.B. Pant Institute of Himalayan Environment and Development ASAman Srivastava

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Implication

Observational study reveals human-driven water quality degradation alters algal assemblages across a river watershed, highlighting the need for targeted conservation strategies.

Key Points

To evaluate the ecological mechanisms linking human-induced environmental pressures to water quality degradation and algal community shifts across a Himalayan river catchment.
Conducted an ecological assessment across three river sites in the Kosi watershed, India, analyzing 33 water and algal samples collected during summer 2023.
Quantified physicochemical parameters, calculated the Water Quality Index (WQI), and applied canonical correspondence analysis across 11 identified algal genera spanning four phyla.
Water quality worsened along a spatial gradient, with Water Quality Index values deteriorating from 42.6 ("excellent") at the upstream site to 266.3 ("very poor") at the downstream site.
Turbidity and pH emerged as the primary drivers of community composition, shifting dominance toward nutrient-tolerant taxa (Spirulina and Oscillatoria) at disturbed sites, while Oedogonium and Spirogyra persisted in stable waters.

Cite This Study

PANDEY et al. (2026) studied this question.

synapsesocial.com/papers/6a817a91f2fb91fc834ae724 https://doi.org/10.1007/s11356-026-38080-5

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Implication

Observational study reveals human-driven water quality degradation alters algal assemblages across a river watershed, highlighting the need for targeted conservation strategies.

Anthropogenic drivers of algal regime shifts in a Himalayan watershed and pathways for nature-based solutions

Discussion

Member takes

Implication

Key Points

Cite This Study

Anthropogenic drivers of algal regime shifts in a Himalayan watershed and pathways for nature-based solutions

Discussion

Member takes

Implication

Key Points

Cite This Study

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