CR

Porhydrus lineatus

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Porhydrus lineatus faces severe threats from habitat degradation and water pollution in its limited freshwater environments. Agricultural runoff and urban development have contaminated the clean, well-oxygenated waters this diving beetle requires for survival. The species' extremely restricted range makes it particularly vulnerable to localized environmental changes, with even small-scale disturbances potentially causing population collapse.

Threat summary

Habitat

This aquatic beetle inhabits clean, well-oxygenated freshwater streams and small rivers with rocky or gravelly substrates. It requires pristine water conditions and is typically found in areas with moderate current flow and abundant aquatic vegetation.

Frequently asked questions

Why is Porhydrus lineatus classified as Critically Endangered?
Porhydrus lineatus is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Porhydrus lineatus faces severe threats from habitat degradation and water pollution in its limited freshwater environments. Agricultural runoff and urban development have contaminated the clean, well-oxygenated waters this diving beetle requires for survival. The species' extremely restricted range makes it particularly vulnerable to localized environmental changes, with even small-scale disturbances potentially causing population collapse.
Where does Porhydrus lineatus live?
Porhydrus lineatus occurs in Åland Islands, Austria, Belarus, Belgium, Czechia, and Denmark (plus 21 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Porhydrus lineatus?
The main threats to Porhydrus lineatus are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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