BIO120H1 Lecture Notes - Lecture 21: Competitive Exclusion Principle, Metapopulation, Symbiosis
36
BIO120H1 Full Course Notes
Verified Note
36 documents
Document Summary
Population persistence of a rare butter y in habitat patchers: Fender"s blue butter y depends on a rare plant. Willamette valley, oregon > native prairie habitat (rich soil), much was converted to agriculture > kincaid"s lupine was found in prairie > it was food for the caterpillars of this butter y. Known in populations in 13 prairie fragments > metapopulation method of conservation. Annual pulses of reproduction followed by heavy laval mortality: Survive within prairie, die if they leave and fail to discover a new prairie. Small patches rely on migration into it for survival > sink populations. Large patches can produce migrants > source populations. Patch that connects source to sink > stepping-stone habitat. Simulation is a more accurate representation of real populations when correct life history parameters are known: Must discover prairie or will die without reproducing: Tailings piles from hard-rock mining create replicated patches of talus slopes > arti cial pika habitat.
