Russet Rootshank
CR

Russet Rootshank

Phaeocollybia lugubris

Unknown

Photo: (c) Christian Apschner, some rights reserved (CC BY-NC), uploaded by Christian Apschner

Overview

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

The Russet Rootshank faces severe threats from habitat loss due to deforestation and fragmentation of old-growth coniferous forests where it depends on specific mycorrhizal relationships. Climate change is altering the delicate moisture and temperature conditions required for fruiting body development, while pollution and soil acidification from industrial activities further degrade its specialized habitat requirements.

Threat summary

Habitat

Inhabits old-growth and mature coniferous forests, particularly those dominated by Douglas fir, western hemlock, and other Pacific Northwest conifers, typically in moist, well-drained soils with thick organic layers. Forms essential mycorrhizal associations with tree roots in undisturbed forest ecosystems at elevations ranging from sea level to montane zones.

TERRESTRIAL· major

Frequently asked questions

Why is Russet Rootshank classified as Critically Endangered?
Russet Rootshank 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. The Russet Rootshank faces severe threats from habitat loss due to deforestation and fragmentation of old-growth coniferous forests where it depends on specific mycorrhizal relationships. Climate change is altering the delicate moisture and temperature conditions required for fruiting body development, while pollution and soil acidification from industrial activities further degrade its specialized habitat requirements.
Where does Russet Rootshank live?
Russet Rootshank 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 Russet Rootshank?
The main threats to Russet Rootshank 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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