Ecology Unit 2 (4)
Terms
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- Succesion
- the change in numjber and kinds of organisms in an area leading to a stble community
- Pioneer community
- the first community to develop in a successional equence
- Climax community
- a community that is the stable end product of succession
- Seral stage
- any successional community between pioneer and climax community
- Sere
- the entire sequence of communities in a successional sequence
- Primary succession
- succession in an area previously unoccupied by a community
- hydrosere
- sere from aquatic toward mesic terrestrial
- Xerosere
- sere rom rock substrate toward mesic
- secondary succession
- succession in an area following destruction of the previous community
- cyclic succession
- sere that eventually returns to the initial community
- Allogenic factors
- weathering, sedimentation
- Autogenic factors
- immigration, growth, reactions, coactions
- Facilitation model
- (+) - early species make enviroment more suitbale for the later species
- inhibition model
- (-) - early species make the environment less suittable for the later species
- Tolerance model
- (0) - no effect; most efficient specialists eventually prevail
- Monoclimax hypothesis
- the climax is determined by the regional climate
- Polyclimax concept
- edaphic climax, topographic climax, fire climax
- Climax pattern concept
- a gernal climax community that changes according to soil, slope and other habitat factors
- Transient climax
- seasonal pond