Abstract
Non-native Alnus species are widely planted in Ireland for landscaping purposes, such as roadside plantings, amenity plantings and revegetation of quarries. This paper gives details of nine locations in Ireland where natural regeneration of A. cordata and A. rubra has been observed. The potential impacts on native habitats, should these species naturalise more widely, are discussed.
Highlights
Alnus glutinosa (Alder) is the only native member of the Genus Alnus in Ireland (Parnell and Curtis, 2012)
A. glutinosa is increasingly being planted in commercial forestry due to its fast growth rates and breeding programmes are in place to grow so-called “plus-trees” to produce trees suitable for timber production (Teagasc, 2019)
A number of non-native Alnus species have been planted in Ireland, principally for landscaping purposes, such as roadside plantings, amenity plantings and revegetation of quarries
Summary
Alnus glutinosa (Alder) is the only native member of the Genus Alnus in Ireland (Parnell and Curtis, 2012). Planting trials of non-native Alnus exist in Ireland for their forestry potential (McCarthy, 1979; Wilson et al, 2018). This paper details locations in Ireland where two other non-native Alnus species, A. cordata (Italian Alder) and A. rubra (Red Alder) have been observed by the author to be naturalising.
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