BIO120H1 Lecture Notes - Lecture 21: Santa Catalina Mountains, Multivariate Statistics, Ecotone
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BIO120H1 Full Course Notes
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Document Summary
Many animal and plant populations are not best considered in isolation. The idea of a population is too simple, because most landscapes have many different populations, not independent of each other due to migration. Application of spatial and metapopulations models to predict butterfly and pika dynamics. Plant ecology statistics: concept of the species association. Gradient studies as a resolution of the debate. Species get on the endangered species list because they were common, but not anymore so something"s going on to prevent them from reproducing and proliferating. Once listed, research money is available to study them. Population persistence of a rare butterfly in habitat patches. A real case in conservation biology and spatial biology. Willamette valley, oregon; in 1850, all native prairie. Now, all but 0. 5% converted to agriculture. Butterfly discovered in 1920, thought extinct by 1931, rediscovered in 1989. Annual pulses of reproduction followed by heavy larval mortality. Butterflies undergo annual cycles of reproduction, then disperse across habitat.
