Ch 53 - population ecology (1 slide per page)

Ch 53 population ecology(1 slide per page)

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: y of how abiotic and biotic factors influence a population’s distribution, density (size), age structure & dynamics Age structure– proportion of individuals in each age class at a point in time Determines rate of change of current & future population size. Rapid: A lot more births than deaths Slow: Slightly more births than deaths None: births = deaths Figure 53.24 (Campbell 9th ed) 11 What is Population Ecology? Study of how abiotic and biotic factors influence a population’s distribution, density (size), age structure & dynamics Demography – Study of the vital statistics of a population and how they change over time 13 Vital statistics Figure 53.3 (Campbell 9th ed) 14 Births and Deaths summarized in a life table Life Table = age-specific summary of survival and reproductive patterns made by following a cohort from birth to death Cohort- group of individuals of the same age Tables 53.1 and 53.2 (Campbell 9th ed) Survivorship 15 Survivorship = # of individuals from a cohort that survives from birth to age x Figure 53.5 (Campbell 9th ed) 16 Survivorship Curves • Pictorial models that depict the probability an individual from a population will survive at any particular age. • Different curves show how survivorship probabilities vary among populations. I = High survival probability most of life, low probability as get old e.g. large mammals w/ few offspring but high parental care II = Similar probability of surviving at all ag...
View Full Document

This note was uploaded on 02/12/2014 for the course BIOLOGY 2011 taught by Professor Woo during the Fall '10 term at University of Central Florida.

Ask a homework question - tutors are online