Overvåking Askeglye Collema leptaleum

The data originate from a field survey carried out by the Norwegian Institute for Nature Research (NINA) in 2025, commissioned by the Norwegian Environment Agency. The dataset includes both presence and documented absence records at surveyed host trees, as well as information on tree condition, habitat structure, and results from ongoing translocation experiments.

The data contribute to long-term monitoring of the species’ population status, habitat quality and threats, including ash dieback, deer browsing and forest infill.