BIO200H5 Lecture 19: Lesson 19- Factors affecting population growth
Document Summary
Pop is always changing, immigration (i), birth (b), death(d) or emigration (e) Closed population not changed by emigration or immigration probably b/c they are separated from other pop by long distance or physical barrier. Open population changed by (e) & (i) (no barriers preventing them from moving in/out) Net population change = (b + i) (d + e) %(cid:1855) (cid:1853)(cid:1866)(cid:1857) (cid:1866) (cid:1868)(cid:1867)(cid:1868) =(cid:4666)(cid:1854) + (cid:4667) (cid:4666)(cid:1856) + (cid:1857)(cid:4667) Changes in pop size that occur over time b/c of change in birth, deaths, immigration, emigration. Result of interactions between internal factors (reproductive ability) and external factor(weather, food supply, predation and disease) The area of biological research concerned with how pop changes over time in relation to their env. And other species is called population ecology: population viability analysis predicting the long-term probability of a population surviving in an area, such as national park.
