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Conservation Bio Main Points 9-26-07

Conservation Bio Main Points 9-26-07 - o Decrease in...

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Conservation Bio Main Points 9/26/07 Reading: Long-Term Region-Wide Declines in Caribbean Corals Discusses coral cover loss as a % Biggest loss was in the 1980s, however there seems to be a decrease in the loss or possibly a recovery May be due to coral diseases such as white band disease, Acropora Could also be due to weather with hurricanes or overfishing Patterns of decline seem to be uniform throughout most regions Big losses due to El Nino Class Notes Major threats to biological diversity that result from human activity o Habitat destruction o Habitat fragmentation o Habitat degradation o Global climate change o Overexploitation o Invasive species o Spread of disease Physical effects of habitat fragmentation
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Unformatted text preview: o Decrease in habitat area o Increase in distance between fragments, animals may not be willing to travel over this area o Habitat degradation has edge effects, they lose the edge of these areas because animals don’t want to even get close to the areas o Change in disturbance patterns: Light, temperature, wind, humidity, fire • Biological effects o Loss of endemic species o Crowding effect at beginning eventually leads to a decline because of loss of habitat • Island biography o Small fragments or islands have fewer species o More isolated fragments have fewer species due to lower immigration • Aquatic Fragmentation o...
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