
Ash
Fraxinus excelsior
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Fraxinus_excelsior
Overview
Fraxinus excelsior, known as the ash, or European ash or common ash to distinguish it from other types of ash, is a flowering plant species in the olive family Oleaceae. It is native throughout mainland Europe east to the Caucasus and Alborz mountains, and west to Great Britain and Ireland, the latter determining its western boundary. The northernmost location is in the Trondheimsfjord region of Norway.
The species is widely cultivated and reportedly naturalised in New Zealand and in scattered locales in the United States and Canada. The wood has many uses as it is flexible, workable, strong and lightweight.
European Ash faces severe population decline primarily due to ash dieback disease caused by the invasive fungal pathogen Hymenoscyphus fraxineus, which has devastated ash populations across Europe since the 1990s. Additional pressures from the invasive emerald ash borer beetle, habitat fragmentation, and climate change further threaten the species' long-term survival.
Habitat
European Ash occurs in mixed deciduous and coniferous forests, woodland edges, hedgerows, and riparian areas across Europe, typically preferring moist, fertile soils in lowland and montane regions up to 1,500m elevation. The species is commonly found in association with oak, beech, and other broadleaved trees in temperate forest ecosystems.
Other threatened species in Oleaceae
Frequently asked questions
Why is Ash classified as Vulnerable?
Where does Ash live?
What are the main threats to Ash?
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