ENVIRON 201 Chapter Notes - Chapter 4: Character Displacement, Secondary Succession, Permafrost

• School: U of M
• Department: Environment
• Course: ENVIRON 201
• Professor: John Benedict

Document Summary

Predation pressure has driven the evolution of an elaborate array of defenses against being eaten. A community is built essentially from scratch: secondary succession: begins when a disturbance dramatically alters an existing community but does not destroy all life and organic matter in the soil. Vestiges of the previous community remain, and these building blocks help shape the process. This can occur at some crucial climactic threshold is passed, keystone is lost, or non- native species invades. Most fail to establish populations, but some turn invasive, spreading widely and coming to dominate communities. They become invasive when limiting factors that regulate their population growth are absent invasive species: spread widely and dominate communities. Especially by removing invasive species and planting native vegetation that had originally grown on-site. Soil is relatively fertile but this biome consists of far fewer tree species that are found in tropical rain forests.