BIOB50H3 Lecture : BIOB50Winter2012 Lecture 21.docx - includes images and relevant textbook notes
Document Summary
Biob50winter2012 lecture 21: metapopulations and metacommunities (end of chapter 10 and end of chapter 12) 2: part a: seven patches of suitable habitat for a species are diagrammed , 4 of which are currently occupied, and 3 are not. Habitat fragmentation: a metapopulation can go extinct even when suitable habitat remains, patches may become ever smaller and more isolated, habitat fragmentation causes colonization rate (c) to decrease, while extinction rate increases the e/c ration increases. The northern spotted owl and habitat fragmentation: spotted owl lives in old growth forests of the pacific northwest that have never been cut, or have not been cut for 200+ years. Skipper butterfly case study: research on the skipper butterfly in the u. k highlighted 2 important features of many metapopulations. Each red of green circle represents a patch of suitable habitat that was not occuipied by the butterfly.
