kjerrmattevever
VU

kjerrmattevever

Kaestneria dorsalis

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Kaestneria_dorsalis

Overview

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

Kaestneria dorsalis faces significant pressure from habitat degradation in its specialized moss and lichen microhabitats within Scandinavian forests. Climate change poses a particular threat as warming temperatures alter the delicate moisture conditions required for the moss communities this spider depends upon. Forest management practices that reduce canopy cover and alter ground-layer humidity further compromise suitable habitat availability.

Threat summary

Habitat

This small spider inhabits the moss and lichen layers of boreal and subalpine forests, particularly favoring areas with consistent moisture and stable microclimate conditions. It is typically found in undisturbed forest floor environments where dense bryophyte communities provide both shelter and hunting grounds.

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Frequently asked questions

Why is kjerrmattevever classified as Vulnerable?
kjerrmattevever 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. Kaestneria dorsalis faces significant pressure from habitat degradation in its specialized moss and lichen microhabitats within Scandinavian forests. Climate change poses a particular threat as warming temperatures alter the delicate moisture conditions required for the moss communities this spider depends upon. Forest management practices that reduce canopy cover and alter ground-layer humidity further compromise suitable habitat availability.
Where does kjerrmattevever live?
kjerrmattevever occurs in Åland Islands, Austria, Belgium, Croatia, Denmark, and Estonia (plus 13 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to kjerrmattevever?
The main threats to kjerrmattevever 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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