ES101 Study Guide - Final Guide: Stoma, Herbivore, Amphiprioninae
8 Dec 2012
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Document Summary
Ecological succession: gradual change caused by environmental disturbance (natural/ human) Primary: ecological community begins where living organisms were not previously. Secondary: an existing community is disrupted, new type of community develops. Stability and resilience: living systems are stable but always changing as there are multiple stable states. Therefore, the goal of resilience rather than simple stability. Outcomes- new community is more resistant to change, although nature may not be in balance (thresholds, flips) Habitat: environment in which a particular organism lives. Niche: role played by a species in ecosystem, or its lifestyle . Island biogeography gives insight on species and land change: Native: naturally associated with ecosystem (frogs in swamps) Indicator: early warning to enviro change (gray jay from alaska to na) Keystone: crucial importance to ecosystem (beaver to canadian water systems) Non native: alien species with negative impact (zebra mussel to great lakes from caspian) Responses are niches, distribution and territory defense (galapagos island birds and their beaks)
