GEOG 203 Lecture 1: section 3 notes geog 203
Document Summary
What happens when these systems are disturbed. Pattern of change in biomes are predictable. Ecological change that occurs in areas that have been denuded, soil organic matter is lost. Left with bare rock (only lichens and moss could grow = thalophite: don"t get very large. Ice compresses and pushes out across landscape glaciers: scrape land surface or deposit on till. Names of players / species can evolve separately. Niche refer to the function of a life form in a given community. Obtain and sustain physical and biological factors needed for survival. Depends on it being an autotroph or heterotroph. Wind disturbance can blow down a single aging tree, if severe a large number of tree falls. Create a canopy of the forest, increasing light to reach forest floor. When the tree falls over completely roots dislodge soil: disturbed mineral soil. Size of gap will affect the composition of the species that begin to fill it.
