Gains and losses across the North American avifauna over the last half century

Range Table - link
Organism Biosphere
Reference Rosenberg KV et al., Decline of the North American avifauna, Science 19 Sep 2019: eaaw1313 DOI: 10.1126/science.aaw1313 figure 3
Method Abstract: "Using multiple and independent monitoring networks, [investigators] report population losses across much of the North American avifauna over 48 years, including once common species and from most biomes." See note beneath figure
Comments P.2 left column top paragraph: "Wetland birds represent the only biome to show an overall net gain in numbers (13%), led by a 56% increase in waterfowl populations (Fig. 3 and Table 1). Surprisingly, [investigators] also found a large net loss (63%) across 10 introduced species (Fig. 3, D and E, and Table 1)." P.2 left column 3rd paragraph: "More than 90% of the total cumulative loss can be attributed to 12 bird families (Fig. 3A), including sparrows, warblers, blackbirds, and finches. Of 67 bird families surveyed, 38 showed a net loss in total abundance, whereas 29 showed gains (Fig. 3B), indicating recent changes in avifaunal composition (table S2)." P.2 left column bottom paragraph: "Increases among waterfowl and a few other groups (e.g., raptors recovering after the banning of DDT) are insufficient to offset large losses among abundant species (Fig. 3)."
Entered by Ron Milo - Admin
ID 117280