BSC 2011 Lecture Notes - Lecture 27: Semelparity And Iteroparity, Resource Distribution, Organism
8 Dec 2016
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Document Summary
From smallest to largest: organism, population, community, ecosystem, biosphere. A population is a group of interbreeding individuals of a single species living in the same general area. Population ecology is the study of births, deaths, and the dynamic forces which regulate a population. There are two ways of describing populations: spatial. Density the number of individuals per unit of area or volume. Count signs of individuals: tracks, poop, fur. Mark and recapture method: capture animals, mark them, recapture, do the math (#marked * total of second capture)/#marked in second capture. Dispersion the pattern of spacing among individuals within the boundaries of the population. Can measure total numbers or can measure density: temporal. Can be dispersed: spaced, clumped, random. Spaced dispersion: evenly spaced out from each other, could result from: Clumped dispersion: organisms in groups, could result from: Random dispersion: organisms randomly spaced out in an area, no real reason is known.
