BIOL 2060 Lecture Notes - Net Reproduction Rate, Dengue Fever, Intraspecific Competition
14 Apr 2013
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Document Summary
Ecology: scientific study of interactions between organisms and their environments (abiotic & biotic) Immigration rate decreases as # of species on newly formed island accumulate because most species that arrive from main land species pool will already be present. Extinction rate increases as # of species on new island accumulate because: larger island pool of potential extinctions, potential for competitive interactions increases as multiple species w/ similar requirements arrive. Hypothesis: cause & effect explanation; a occurs because of b. Prediction: c; if a occurs because of b, then you would expect c to be true. Theory: species richness on island dynamic equilibrium between immigration rates (distance) Experimental results mostly support theory but it needs revision. Factors affecting distribution and abundance of a species (abiotic) Physiological ecology: liebig"s law of the minimum, shelford"s law of tolerance. Geographical range and climate: temperature, moisture. Climate change: range existence, phonological changes in beginning of reproduction.
