Biology 2483A Quiz: Population Distribution and Abundance.docx
2 Jan 2015
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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. Geographic area where individuals of a species occur. 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. 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: when the area isn"t fully known, an area is delimited based on best available knowledge of the species. Thursday october 2, 2014: species vary in their ability to disperse, other species, such as whales, can move thousands of kilometers in a year.
