BIOL 2060 Lecture Notes - Lecture 21: Soil, Climax Species, Climax Community
19 Apr 2016
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Document Summary
Succession: gradual change in plant and animal communities in an area following disturbance: pioneer species the first species to colonize a newly disturbed area, primary success succession on a newly exposed geological substrate. After glacial retreat, on the cooled lava after a volcanic eruption: secondary succession follows a disturbance that does not destroy the soil. Climax community: late successional community that remains stable until disrupted by another distrubance. After a volcanic eruption, an island formed: has no soil in the beginning. The number of plants on the island steadily increasing. Glaciers retreating off the land: see an increase in diversity on newly exposed areas. Still seeing an upward trend in number of species 2000 years after the retreat. Timing of increasing species richness differs among plant types. Succession after a forest fire: communities with a longer amount of time since the fire are less dense than those with a more recent fire. Mix of pioneer species and developing climax species.
