BIOL208 Lecture Notes - Environmental Niche Modelling, Niche Differentiation, Four-Dimensional Space
9 Apr 2014
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Principle of allocation: the amount of energy available to each organism is limited, when energy is allocated to one function. It reduces the energy available for other functions. Energy budgets: growth, maintenance, activity, reproduction, smallest energy allocation. The hutchinsonian niche: grinnell and elton, pre-hutchinson, they had a pretty good idea what a niche was. Grinnel: talked about the impact of the abiotic environment. Elton: talked about biological interactions between other organisms: hutchinson, combined grinnel and elton"s ideas, an n-dimensional hypervolume. 3d is the highest dimension that can be shown visually. N is the number of environmental factors important to survival and reproduction: match what you find in the environment and compare it with the niche of an organism to see if it would be a good fit. Fundamental niche: physical condition under which a species might live in the absence of interactions with other species, ex. Upper and lower lethal temp superimposed with upper and lower lethal salinity.
