Marsh Valerian
VU

Marsh Valerian

Valeriana dioica

Unknown

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

Overview

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

Woods Valerian faces significant pressure from agricultural intensification and drainage of wetland habitats across its European range. The species' specialized requirement for calcareous fens and wet meadows makes it particularly vulnerable to hydrological changes and nutrient enrichment from agricultural runoff. Habitat fragmentation has isolated remaining populations, reducing genetic diversity and limiting natural recolonization of suitable sites.

Threat summary

Habitat

Woods Valerian inhabits calcareous fens, wet meadows, and marshy grasslands, typically in areas with alkaline soils and consistent moisture levels. The species shows a strong preference for nutrient-poor wetland environments and is often found in association with other specialized fen plants.

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Frequently asked questions

Why is Marsh Valerian classified as Vulnerable?
Marsh Valerian 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. Woods Valerian faces significant pressure from agricultural intensification and drainage of wetland habitats across its European range. The species' specialized requirement for calcareous fens and wet meadows makes it particularly vulnerable to hydrological changes and nutrient enrichment from agricultural runoff. Habitat fragmentation has isolated remaining populations, reducing genetic diversity and limiting natural recolonization of suitable sites.
Where does Marsh Valerian live?
Marsh Valerian 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 Marsh Valerian?
The main threats to Marsh Valerian 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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