WFC 151 Study Guide - Midterm Guide: Migratory Bird Treaty Act Of 1918, Lacey Act Of 1900, Habitat Destruction
21 Oct 2018
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Document Summary
Habitat continued: habitat cue a physical attribute or condition of a habitat that reliably indicates the presence of other resources and conditions that an organism needs to survive. Are they present or not: relative abundance or use more common and informative method. Where does an animal most commonly occur, where are its densities highest, and where does it prefer to be. Looks at survival and reproductive success: habitat fragmentation the breaking up of habitat into small patches as a result of habitat destruction, habitat destruction the reduction in total habitat available. Does not necessarily lead to habitat fragmentation: smaller habitat patches cannot support larger populations which then has genetic consequences (reduction in genetic diversity) When habitats become fragmented below the distance that cowbirds can penetrate into the intact habitat no vireo nests are safe: the effective size of reserves (assuming they are fragmented habitat) is less than we think.
