BIOL 230 Study Guide - Midterm Guide: Ecological Niche, Species Richness, Biogeography

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3 Dec 2016
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Local scale: scale of an ecological community: single habitat, small enough so all species could potentially interact with each other (at least over a few generations), big enough to contain all species that exist in that habitat. Dispersal limitation: not all species in region can get to a location. Habitat limitation: not all species that can disperse to a location can survive the conditions. Biotic limitation: not all species that can disperse to a location can survive the interactions with each other. If dispersal limited # of species in a community, then # of species in a community would be: proportional to # of species in region. Dispe(cid:396)sal li(cid:373)itatio(cid:374) is (cid:862)(cid:272)o(cid:374)te(cid:374)t depe(cid:374)de(cid:374)t(cid:863): depe(cid:374)ds o(cid:374) t(cid:455)pe of (cid:272)o(cid:373)(cid:373)u(cid:374)it(cid:455) a(cid:374)d dispersal abilities of taxa considered: sometimes researchers accidentally use too big of an area for local richness or not accurately measuring regional richness. Dispersal limitation can be assessed through species invasions. Often leads to net increase of local diversity.

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