BIO120H1 Lecture Notes - Lecture 21: Spatial Ecology, Conservation Biology, Santa Catalina Mountains
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BIO120H1 Full Course Notes
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Population persistence of rare butterfly in habitat patches. Real case in conservation biology and spatial ecology. Willamette valley, oregon: in 1850, all native prairie. Butterfly discovered in 1920, thought extinct by 1931, rediscovered in 1989. Annual pulses of reproduction followed by heavy larval mortality. 100 years ago: exponential decline each growing season, steady, not declining to extinction, something regulating. Depends on number of patches, size, and distance between (habitat corridors, ravines in. Space matters a lot in terms of population persistence. Explicit spatial map of habitat with two types of vegetation (prairie and farm) Butterflies undergo annual cycles of reproduction, then disperse across habitat. Butterflies must discover prairie or will die without reproducing. Tailings piles fro hard-rock mining create many small replicated patches of pika habitat. Patches with numbers: particularly good, high numbers, anchoring some of the pattern that we see. Moved from observational data to come up with model representation, simulation model, parameters estimated from actual data.
