Chapter 56 Animations   Study Guide

Unit 8: Ecology Conservation Biology and Restoration Ecology Review
  1. Human activities are destroying and degrading natural ecosystems, resulting in the loss of and the of species.
  2. Most species loss can be traced to four major threats:
    • Habitat and reduces biodiversity.
    • species can displace native species and disrupt their adopted communities.
    • can reduce population size and reduce diversity.
    • Disruption of networks.
  3. Conserving endangered and threatened species:
    • Small-population approach: a small population is prone to -feedback loops that draw the population down an vortex.
    • Declining-population approach: study populations that show a trend, and take proactive strategies to halt the decline.
  4. Landscape ecology and ecosystem management:
    • Boundaries between natural ecosystems are called and are zones of rich biodiversity, but artificial edges often and deteriorate ecosystems.
    • Establishing areas, especially in spots of biodiversity.
    • Large, pristine nature are rare; reserves are an alternative in heavily populated areas.
    • ecology attempts to restore degraded ecosystems to a more natural state.
    • Ultimately, the drive for conservation may be based on .
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