Snow gums are experiencing dieback in Kosciuszko National Park, largely because of the impacts of the native longicorn (or ‘longhorn’) beetle. These beetles prefer to lay their eggs on moisture-stressed trees and, in warmer weather, the longicorn beetle can hatch and grow up to 75% faster (reports here). This has been linked to climate change because of warmer temperatures in alpine areas.
So far, impacts seem to be limited to areas in the Snowy Mountains among two distinct subspecies of snow gum – in the Guthega and Perisher areas and parts of Thredbo.
This is an update on the research into the impacts of dieback in these areas.

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