Biology 2483A Lecture Notes - Lecture 8: Genetic Algorithm, Apomixis, Ecological Niche
9 Oct 2017
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Topic: population distribution and abundance: populations are dynamic; they vary over time and space. Distribution: geographical area where individuals of a species are present. Abundance: number of individuals of a species found in a given area. Both distribution and abundance can vary over time and space: any change is going to affect the entire ecosystem, ripple effect. Members of a population interact ie. breeding, competition for resources (mates, food, space, etc ) Two measures used to describe a population: population size, population density. Example: eurasian blackbird: in the summer, a population in turkey is not likely to interact with a population in. Scotland: if the individual do not interact, they"re in different populations, populations are best defined in the moment of time. Example: monarch butterfly: population size decreased by 41 million, population density stayed the same despite decrease in population size. In 1964 most beetles found in the hector site.
