BIOL 1001 Lecture Notes - Lecture 11: Survivorship Curve, Exponential Growth, Logistic Function
Document Summary
Biol 1001 symbiosis lecture week 11 (march 21 23) Population ecology the study of how and why the number of individuals in a population changes over time. Demography the study of factors that determine the size and structure of populations through time. Generation the average time between a mother"s first offspring & her daughter"s first offspring. The number of individuals present in a population depend on 4 processes: birth, death, immigration and emigration: populations grow due to: births and immigration, populations decline due to: deaths and emigration. Life tables and survivorship curves summarize demographic information. Survivorship the proportion of offspring produced that survive to a particular age. Cohort group of the same age that can be followed through time: to analyze general patterns in survivorship, biologists plot the logarithm of the # of survivors versus age, resulting graph: survivorship curve. Survivorship curves show proportion of individuals that survive for particular lengths of time as a % of max life span.
