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Community Structure
Absolute and relative abundance of species in a community; which species are present.
Three components of community structure…
Interspecific competition, predation, and disturbance.
Keystone Species
Organism with strong impact on environment.
Keystone Predator
Eats competitively dominant prey.
Examples of keystone species and predator…
Starfish and California Mussel
Disturbance
A relatively discrete event in time that disrupts ecosystem, community or population structure and changes resources, substrate availability, or the physical environment.
Abiotic Sources of Disturbance
Fire, hurricanes, ice storms, flash floods.
Biotic Sources of Distubance
Disease, predation.
Human-Caused Sources of Disturbance
Timber harvesting, road/bridge, construction.