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Io fluvialis

Unknown

Overview

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

Io fluvialis faces severe population declines primarily due to water pollution and habitat degradation in its freshwater river systems. Dam construction and water diversions have fragmented populations and altered natural flow regimes essential for reproduction. Agricultural runoff containing pesticides and fertilizers has degraded water quality in many watersheds where this species occurs.

Threat summary

Habitat

Io fluvialis inhabits clean, fast-flowing freshwater rivers and streams with rocky or gravelly substrates. The species requires well-oxygenated water and is typically found in areas with moderate to strong currents.

Other threatened species in PLEUROCERIDAE

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Pleurocera annulifera

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Pleurocera curta

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Pleurocera alveare

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Pleurocera walkeri

Unknown

Frequently asked questions

Why is Io fluvialis classified as Endangered?
Io fluvialis is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Io fluvialis faces severe population declines primarily due to water pollution and habitat degradation in its freshwater river systems. Dam construction and water diversions have fragmented populations and altered natural flow regimes essential for reproduction. Agricultural runoff containing pesticides and fertilizers has degraded water quality in many watersheds where this species occurs.
Where does Io fluvialis live?
Io fluvialis occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Io fluvialis?
The main threats to Io fluvialis 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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