Alnus incana

Alnus incana is a medium-sized broadleaved tree of Central and Northern Europe. As A. glutinosa it is fast-growing but short-lived, and is often found along lake shores and river banks. It is more frost-tolerant than A. glutinosa, but tends to occur as smaller and often multi-stemmed tree or shrub. It is a nitrogen fixing species that has soft wood of light tan or redish color. Density and durability are low, except when used under water. The wood has little commercial value but can be used for fuel wood and charcoal production.
For herbivore insects on grey alder the same applies as to its congener A. glutinosa. This tree has a rich associated fauna that also includes a sizeable fraction of host specialists at the tree genus level.
References: ^1,2,3,6