BISC 102 Lecture Notes - Lecture 16: Logistic Function, Local Extinction, Anthropocene
21 Apr 2016
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Document Summary
Individuals in a population use common resources, cope with similar environmental factors, and interact with one another and with their environment. Population ecologists describe populations and ask questions about how individuals vary through space. Demography: the statistical study of how population size/structure change over time. (population structure) Life table: a summary of deaths/survivors at various age classes for. Range: geographic area a population resides in. Uniform or regular: individuals evenly spaced (maintain individual distance) It occurs when biotic and abiotic conditions are relatively homogenous. Sampling: counting a proportion of the population to estimate the total number of individuals per unit area. Quadrat sampling: organisms that are sessile (e. g. plants, barnacles) or slow moving (e. g. sea stars) Quadrat: sampling area of any size or shape (e. g. 1 m2 ) Q = average # individuals per quadrat. Aq = area of the quadrat (cm2 , m2 ) Ap = area inhabited by the population (same units!)
