EEMB 113 Lecture Notes - Lecture 14: Avian Malaria, Wader, Invasive Species
28 Nov 2017
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Document Summary
Normally occur where bird evolved without predators (e. g. on islands) Can drive the whole population to extinction on islands. More and more bird species are at risk of extinction. 2 risk factors for extinction that isn"t related to declination. A storm can drive whole species on island to extinct. 60% of all birds are in decline, but some much worse than others due to. Not enough food- seabirds need 1/3 of fisheries. Give birth to offspring on isolated islands where they are no predators, because we introduce predators to the islands (e. g. collecting eggs) If climate change move that, shorebirds will lose the stop-over sites. Due to development of either/ both shorebird habitats. Aerial insectivores (birds that catch insects in flight, such as swallows, swifts, and flycatchers) Become less of the problem in developed countries. Once constituted 25 to 40 per cent of the total bird population of the united. 70% of islands on earth have rats introduced by human.
