BIO120H1 Study Guide - Final Guide: Spatial Ecology, Jack Pine, Pioneer Species
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BIO120H1 Full Course Notes
Verified Note
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Document Summary
Lecture 9 study notes: spatial ecology, plant communities, and disturbance. Pioneer species get in first from either dispersal or seed bank. Important factors that drive species replacement: soil-building processes and shade (taller plants out-shade shorter plants) Most heavily studied in human-impacted landscapes in eastern north america, especially old- field succession from abandoned land to forest. Vegetation changes spontaneously as vegetation itself modifies environment. Starts with pioneer species weedy type plants, r-strategists, short-lived, annuals, good at dispersing. Ends at stable climax stage-no new species introduced, animals adapted to climax environment, k-strategists, good at competition for resources, make bigger seeds, no large investments in dispersal, tolerant in dense shade, unlike pioneer species. Primary: new substrate created, no pre-existing vegetation, rare but does happen eg. formation of new sand dunes on seashores, retreat of glacier opens up habitat that didn"t have any habitat.
