BIOL 103 Lecture : patch size
14 Jan 2013
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Document Summary
Species from surrounding habitats colonize on the edges of patches to compete with or prey on species living there. Species disappeared from isolated patches when the surrounding forest was cut. Species that are lost from small habitat fragments are unlikely to become reestablished there because dispersing individuals are unlikely to find isolated fragments. A species may persist in a small patch if it is connected to other patches by corridors of habitat through which individuals can disperse. Invasive when species spread widely and become unduly abundant, often at a cost to the native species of the region. Disease outbreaks usually leave no traces in the fossil record. Due to human activities, average temperatures in north america will increase about 2- Protected areas an important component of efforts to preserve biological diversity. Preserve habitats while preventing the human exploitation of the species living there may serve as nurseries from which individuals disperse into exploited areas.
