BIO120H1 Lecture Notes - Lecture 21: Habitat Fragmentation
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BIO120H1 Full Course Notes
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These butterflies can only breed on one plant. Butterflies have a population boom in the spring when the flowers bloom, and adults fly around trying to fi(cid:374)d the pla(cid:374)ts. If they do(cid:374)"t fi(cid:374)d a(cid:374)y, they die, if they do, they (cid:272)a(cid:374) reprodu(cid:272)e. habitat fragmentation is where habitats are split apart with areas of uninhabitable areas inbetween them. Big patches can sustain populations, small ones cant. Left is map of the tailing piles in the study area. The graphs are looking at which piles are occupied by pikas. In the north pat(cid:272)h thi(cid:374)gs are good for pikas. I(cid:374) (cid:373)id (cid:374)etwork they are(cid:374)"t doi(cid:374)g as well, their o(cid:272)(cid:272)upa(cid:374)(cid:272)y is pat(cid:272)hy. I(cid:374) south, they start out at high occupancy they start out high but decline. A source population can maintain itself, a sink population depends on imports to maintain a population. Organismal hypothesis is where organisms exist together because they depend on eachother, they interact with eachother.
