VU

Smallest Pottia

Microbryum davallianum

UnknownLCEULCEU

Overview

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

Microbryum davallianum faces severe pressure from agricultural intensification and urban development that destroys its specialized calcareous soil habitats. Climate change poses an additional threat through altered precipitation patterns that affect the delicate moisture balance required for this moss's reproductive cycles. Habitat fragmentation isolates remaining populations, reducing genetic diversity and limiting natural recolonization of suitable sites.

Threat summary

Habitat

This tiny moss species inhabits thin soils over limestone and other calcareous substrates, typically found on disturbed ground, path edges, and open areas with minimal vegetation cover. It requires specific soil chemistry and moisture conditions, often occurring in ephemeral habitats that experience periodic disturbance.

Other threatened species in Pottiaceae

VU

Rigid Aloe-moss

Aloina rigida

Unknown
VU

Rufous Beard-moss

Bryoerythrophyllum ferruginascens

Unknown
Heim's PottiaVU

Heim's Pottia

Hennediella heimii

Unknown
VU

Yellow Crisp-moss

Tortella flavovirens

Unknown

Frequently asked questions

Why is Smallest Pottia classified as Vulnerable?
Smallest Pottia is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Microbryum davallianum faces severe pressure from agricultural intensification and urban development that destroys its specialized calcareous soil habitats. Climate change poses an additional threat through altered precipitation patterns that affect the delicate moisture balance required for this moss's reproductive cycles. Habitat fragmentation isolates remaining populations, reducing genetic diversity and limiting natural recolonization of suitable sites.
Where does Smallest Pottia live?
Smallest Pottia 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 Smallest Pottia?
The main threats to Smallest Pottia 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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