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BIOL 208 (February 5, 2014) - "Rarity", Metapopulations, Climate Change & Phenology

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Biology (Biological Sciences)
James Cahill

BIOL 208 (February 5, 2014) • Rarity o Really complicated to classify as such  Due to: when we describe populations, we talk about density and distribution • Extensive or narrow geographical range o Narrow? Rare in a sense that it is not globally dist. • Population Density o Can be considered rare because of low population density EVEN though they may be globally distributed  Many aspects (kinds) of rarity • You may be one of them, none of them, or a combination of them • Canada’s Species at Risk Act o ID or species, and plan protection/recovery o Committee on status of endangered wildlife recomm. o Minister of Environment Lists o By April 2006, COESWIC evaluated 727 species  73% recommended for listing  Only 389 listed (approved by Ministers of Environment) • There is a bias of listing o Marine and northern species are biased against  Fishes listed usually are a part of the fishing industry • Metapopulations o Complex network of movement/residency with important conseq. For species abundances, extinctions, and gene flow. o Essential points:  Population of subpopulat
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