BIO120H1 Lecture Notes - Lecture 21: Population Ecology, Spatial Ecology, Exponential Decay
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BIO120H1 Full Course Notes
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Bio120h1 f - lecture 21 - metapopulations, plant community composition. Real case in conservation biology & spatial ecology. Fender"s blue butterfly depends on a rare plant, kincaid"s lupine. In 1850, the plant was much more abundant, as willamette valley, oregon the place it grew in. Now, all but 0. 5% has been converted to agriculture as prairie has very good soil. Butterfly discovered in 1920; thought extinct by 1931, rediscovered 1989 in the 0. 5% prairie habitat patches - found in 13 prairie fragments. Very rare as its larvae can only eat the leaves of lupine, and no other plants. Population model shows that it has annual pulses of reproduction followed by heavy larval mortality. Females have to find patches of prairie during reproduction season in order for its larvae to survive; otherwise, its larvae would die. Demonstration of fender"s butterfly using ecobeaker simulation model. Explicit spatial map of habitat with two types of vegetation, prairie and farm.
