Compact Swan-neck Moss
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Compact Swan-neck Moss

Campylopus brevipilus

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Photo: iNaturalist: (c) Valentin Hamon, some rights reserved (CC BY-NC), uploaded by Valentin Hamon

Overview

Compact Swan-neck Moss (Campylopus brevipilus) is a small acrocarpous moss characterized by its distinctive curved setae that resemble a swan's neck and short, densely packed leaves. This bryophyte forms compact cushions or turfs on acidic substrates and plays a crucial role in soil stabilization and moisture retention in its specialized microhabitats.

Compact Swan-neck Moss (Campylopus brevipilus) is critically endangered due to its extremely limited distribution and vulnerability to habitat degradation. The species faces severe threats from human activities that alter its specialized moss habitat requirements, including changes in moisture levels, substrate disturbance, and potential climate impacts on its restricted range.

Threat summary

Habitat

This moss typically grows on exposed acidic rock faces, particularly sandstone outcrops and weathered granite surfaces in upland areas. It also colonizes disturbed acidic soils along roadside cuttings and the edges of old quarries where competition from vascular plants is minimal.

Frequently asked questions

Why is Compact Swan-neck Moss classified as Critically Endangered?
Compact Swan-neck 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. Compact Swan-neck Moss (Campylopus brevipilus) is critically endangered due to its extremely limited distribution and vulnerability to habitat degradation. The species faces severe threats from human activities that alter its specialized moss habitat requirements, including changes in moisture levels, substrate disturbance, and potential climate impacts on its restricted range.
Where does Compact Swan-neck Moss live?
Compact Swan-neck 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 Compact Swan-neck Moss?
The main threats to Compact Swan-neck 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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