Duval's Thread-moss
CR

Duval's Thread-moss

Bryum weigelii

UnknownLCEULCEU

Photo: (c) michael-lueth, some rights reserved (CC BY-NC)

Overview

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

Weigel's Bryum Moss faces severe threats from habitat degradation and loss of its specialized microhabitats. Climate change and human disturbance to its limited range pose significant risks to the remaining populations of this critically endangered bryophyte.

Threat summary

Habitat

This moss species typically occurs on calcareous soils, limestone rocks, and alkaline substrates in open grasslands and rocky outcrops. It requires specific moisture conditions and is often found in areas with seasonal water availability and moderate disturbance regimes.

Other threatened species in Bryaceae

VU

Anomobryum clavicaule

Unknown
EN

Acidodontium rhamphostegium

Unknown
EN

Bryum sordidum

Unknown
VU

River Thread-moss

Bryum riparium

Unknown

Frequently asked questions

Why is Duval's Thread-moss classified as Critically Endangered?
Duval's Thread-moss 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. Weigel's Bryum Moss faces severe threats from habitat degradation and loss of its specialized microhabitats. Climate change and human disturbance to its limited range pose significant risks to the remaining populations of this critically endangered bryophyte.
Where does Duval's Thread-moss live?
Duval's Thread-moss 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 Duval's Thread-moss?
The main threats to Duval's Thread-moss 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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