Dark-green Flapwort
VU

Dark-green Flapwort

Jungermannia atrovirens

UnknownLCEULCEU

Photo: iNaturalist: (c) Helen Waterman, some rights reserved (CC BY), uploaded by Helen Waterman

Overview

Dark-green Flapwort (Jungermannia atrovirens) is a small leafy liverwort characterized by its distinctive dark green to blackish-green coloration and flattened, overlapping leaves arranged in two rows along prostrate stems. This bryophyte plays an important ecological role in nutrient cycling and soil stabilization in its specialized habitats, while also providing microhabitat for invertebrates and contributing to moisture retention in forest ecosystems.

Dark-green Flapwort faces significant threats from habitat degradation and loss of suitable bryophyte microhabitats due to air pollution, climate change, and human disturbance. This small liverwort is particularly vulnerable to changes in moisture levels and substrate quality that affect its specialized ecological niche. Conservation status may vary by region or assessment authority, but populations are declining in many areas due to environmental pressures.

Threat summary

Habitat

Occupies moist, shaded environments including rotting logs, peaty soil, and rock crevices in deciduous and mixed woodlands, particularly in areas with high humidity and stable moisture conditions. Also found on stream banks, woodland paths, and other sheltered microsites with organic substrates.

Other threatened species in Jungermanniaceae

Dwarf FlapwortVU

Dwarf Flapwort

Jungermannia pumila

Unknown

Frequently asked questions

Why is Dark-green Flapwort classified as Vulnerable?
Dark-green Flapwort 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. Dark-green Flapwort faces significant threats from habitat degradation and loss of suitable bryophyte microhabitats due to air pollution, climate change, and human disturbance. This small liverwort is particularly vulnerable to changes in moisture levels and substrate quality that affect its specialized ecological niche. Conservation status may vary by region or assessment authority, but populations are declining in many areas due to environmental pressures.
Where does Dark-green Flapwort live?
Dark-green Flapwort 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 Dark-green Flapwort?
The main threats to Dark-green Flapwort 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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