BIOL 180 Chapter Notes - Chapter 20: Habitat Fragmentation, Sea Level Rise, Tropical And Subtropical Moist Broadleaf Forests
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BIOL 180 Full Course Notes
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Document Summary
Extinction rates are greater than ever before currently other than the asteroid that wiped out dinosaurs. Possible 6th mass extinction occurring right now. Endangered species: species whose numbers have decreased so drastically that it is almost certain to go extinct unless effective conservation programs are put in place. Multiple interacting threats: habitat loss = single most important factor in the decline of these species (terrestrial, nearly all endangered species are affected by more than one factor. Conservation biologists need to solve more than one problem for any given species to recover: overexploitation = dominant problem for marine species o o o. Logging and burning forests: damming rivers o o. Building housing developments, buildings, etc: most of the leftover (<25%) of the wild lad is near the poles, where biodiversity is lowest, deforestation. Preserving primary forests is an extremely high priority for sustaining biodiversity instead of reforestation o. Moderate effects of climate change by storing carbon.
