Editing IPCC:AR6/WGII/Chapter-2 (section)

===== 2.4.4.3.4 Tree mortality and fauna =====

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A global meta-analysis of 59 studies encompassing 631 cases of animal abundance changes in areas of tree mortality over the past 7–59 years, primarly in North America and Australia, with a few sites in other regions (e.g. Europe). Overall, in areas with documented high tree mortality, bird abundances increased (n=186 bird species), there was no significant trend for mammals (n=33 species), a slight trend towards declines in invertebrates (n=28 species), and insufficient information to categorize the responses of reptiles (n=20 species). However, within groups, significant differences appeared. Mammals that use trees as refugia showed declines with tree mortality ''(high confidence)'' , but flying mammals (e.g. bats) increased ''(medium confidence)'' . Ground-nesting, ground-foraging, tree-hole nesting and bark-foraging birds increased most, but nectar-feeding and foliage-gleaning birds declined ''(high confidence)'' . Within invertebrates, declines were strongest in ground-foraging predators and detritivores ''(medium confidence)'' ( [[#Fleming--2021|Fleming et al., 2021]] ).

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