BIOL208 Lecture Notes - Sub Pop, Phenology, Metapopulation
9 Apr 2014
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Document Summary
Biol 208 (february 5, 2014: rarity, really complicated to classify as such. Rare in a sense that it is not globally dist: population density, can be considered rare because of low population density even though they may be globally distributed. Only 389 listed (approved by ministers of environment: there is a bias of listing, marine and northern species are biased against. Fishes listed usually are a part of the fishing industry: metapopulations, complex network of movement/residency with important conseq. For species abundances, extinctions, and gene flow: essential points: Connected by movement of individuals from one subpopulation to another: movement to another augments the population density of the destination"s subpop. Can go extinct and be re-colonized repeatedly over time: all have a chance of reaching a population of 0 but it has chances to be repopulated again. Extinction is generally greatest for small subpop. , which usually occur in small patches on the landscape.
