ENV100Y5 Lecture Notes - Lecture 10: Invasive Species, Secondary Succession, Ecosystem Model
69
ENV100Y5 Full Course Notes
Verified Note
69 documents
Document Summary
Resistance = community of organisms resists change and remains stable despite the disturbance. Resilience = a community changes in response to a disturbance, but later returns to its original state. Succession = the predictable series of changes in a community following a disturbance. Primary succession = disturbance eliminates all vegetation and/or soil life. Secondary succession = a disturbance dramatically alters, but does not destroy, all local organisms. Pioneer species = the rst species to arrive in a primary succession area (e. g. , lichens) Secondary succession: res, hurricanes, farming, logging remaining organisms form building blocks for the next species to arrive & establish. Invasive species pose new threats to community stability. Invasive species = non-native (exotic) organisms that spread widely and become dominant in a community. Restoration ecology: the science of restoring an area to the condition that existed before humans changed it. Ecosystem ecology: study of interactions among organisms and their physical environment as an integrated system.
