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11 Cards in this Set

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  • Back
Intermediate disturbance hypothesis
Moderate levels of disturbance can create conditions that foster greater species diversity than low or high levels of disturbance.
Non-equilibrium model
Communities are constantly changing after being buffeted by disturbances.
Sequential changes, following disturbance, in the biota occupying and affecting a site
Primary succession
The first species to arrive on a truly bare or sterilized space.
Secondary succession
When the space has been opened and depopulated, but some residual biota has survived.
Degradative succession
A species that populates a habitat that disappears over time. Examples: rotting log, infested acorn.
Climax community
The late succession stage in which the dominant species can replace itself - young of climax species can successfully recruit under established adults.
The earlier species has a positive effect on a later species.
The earlier species has a negative effect on later species.
The earlier species has no effect on a later species.
Disturbance effect on food chains
Disturbance may lengthen food chains because:
-Lower trophic levels are generally more susceptible to disturbance mortality.
-Early successional species are generally more edible.