boreal forest are likely to undergo irregular and large-scale losses of living trees because of the impacts of projected climate change ;
(boreal forest; are; likely to undergo irregular and large-scale losses of living trees; because of the impacts of projected climate change) (boreal forest; to undergo; irregular and large-scale losses of living trees)
boreal forest boreal forest
are to undergo
likely to undergo irregular and large-scale losses of living trees because of the impacts of projected climate change
irregular and large-scale losses of living trees