ash tree

The condition of the ash species in North America is the clearest example showing that the main threat to wildlife is invasive pests due to human activities.

British scientists have mapped the genome of the British ash tree, in a search to find a way to protect forests from a deadly fungus.

Tens of thousands of ash trees in the UK are infected with dry up branches, causing them to dry up and die. The disease is caused by Chalara fraxinea fungus.