GEOB 102 Lecture Notes - Lecture 14: Cattle Egret

• School: UBC
• Department: Geographical Biogeosciences
• Course: GEOB 102
• Professor: Greg Henry

Document Summary

Populaion: a group of individual organisms of the same species occupying a given area at the same ime. Populaion dynamics: change in the number of individuals in a populaion: between locaions(spaial) Comparing the size of one populaion to another: at one locaion(temporal) Habitat: biophysical factors where a species lives that matches niche requirements. Dispersal: ability to move from birth site new site: ecological dispersal: within geographic range, geographical dispersal: expansion of range. Agricultural landscape allows the catle egret to prosper and breed . Difusion: slow extension of range over ime. Dispersal: depends on habitat, species moving through landscape, corridors: regions of similar characterisics in climate and vegetaion structure that facilitate dispersal, organisms have to move. Ecological barriers: bioic interacion: barriers that don"t work well with organisms, diseases, parasites, predators, lack of prey. Populaion: temporal change: how many ways can a populaion change in size: birth, death, immigraion, emigraion. Populaion changes in size because of interacions between individuals and their environment.