Biology 2483A Lecture Notes - Lecture 12: Larrea Tridentata, Aspen Grove, Cooperative Breeding

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Population: group of interacting individuals of the same species living in a particular area. Interactions within populations include sexual reproduction and competition: populations are dynamic - distribution and abundance can change over time and space. Understanding the factors that influence these dynamics helps us manage populations for harvest or conservation. Distribution: geographic area where individuals of a species occur. Abundance: number of individuals in a given area: abundance can be reported as population size (# of individuals), or density (# of individuals per unit area), example: on a 20-hectare island there are 2,500 lizards. Population density = 125/hectare: when the area isn"t fully known, an area is delimited based on best available knowledge of the. Sometimes the total area occupied by a population is not known. It is often difficult to know how far organisms or their gametes can travel. species: abundance can change over time and space.

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