29 - population ecology - Ecology: Population Level...

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1 Ecology: Population Level Ecology : the study of the distribution and abundance of living organisms and how these properties are affected by organism’s interactions with their environment (biotic and abiotic) Can be at different levels Population – interactions of organisms of the same species occupying a specified geographic area Not necessarily the same as a population as defined in evolutionary terms Community – interactions of organisms of different species Ecosystem - a community of organisms and its environment functioning as an ecological unit. Can be on different scales (spatial and temporal) Depends on the nature of the organism and the questions being asked E.g., microbes may be on the scale of cm and days; wolves on the scale of kilometers and years Usually ignores the possibility of evolution, i.e., the time scales are short enough that evolution does not have time to have a significant role in the interactions of the organisms studied. Still ecology relates to evolution because ecological circumstances often determine fitness Often treats the underlying genetics as a black box, but not always (ecological genetics)
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29 - population ecology - Ecology: Population Level...

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