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# In Himalayan coal-drainage streams, resistant diatoms tracked a mixture of chemical stresses
- URL: https://intelligence.wildlandseco.com/2026-10-14-himalayan-coal-mine-acid-streams-diatoms/
- Published: 2026-10-14T13:52:25.000Z
- Updated: 2026-10-14T13:52:25.000Z
- Description: Three mine-affected streams differed from a comparison stream in acidity, metals and ions; algal assemblages reflected their combined chemistry.
- Author: Benjamin Worlund
- Tags: India, acid mine drainage, diatoms, water quality, Water, Mining, Infrastructure, Monitoring, #ecological-intelligence, #brief-2026-10-14, #global-radar, #peer-reviewed, #geo-asia

Evidence

Peer-reviewed

Geography

Jaintia Hills, Meghalaya, India

System

Acid mine drainage; stream diatoms

## WHAT THE EVIDENCE SAYS

Seasonal sampling compared three mine-drainage-affected streams with one comparator. Impacted waters were more acidic and carried elevated metal and ionic signals. Species including Pinnularia biceps and Eunotia exigua showed associations with particular multi-variable chemical gradients, supporting a role as potential local bioindicators.

## WHY IT MATTERS / OUR READ

Water-quality surveillance should pair chemical measurements with biological responses: survival of tolerant organisms does not establish healthy stream condition.

## CAVEATS / UNCERTAINTY

Only three dominant diatom taxa and four streams were analyzed. Associations cannot isolate individual metal effects or establish a widely transferable index without testing.

## SOURCE

Water Science — primary stream chemistry and algal study  
[View original evidence ↗](https://doi.org/10.1007/s44533-026-00080-2?ref=intelligence.wildlandseco.com)

From the Morning Brief · 2026-10-14

[Read the full Morning Brief →](https://intelligence.wildlandseco.com/morning-brief-2026-10-14/)