BIO 101 Chapter 21: Bio 101 Ch 21
19 Sep 2016
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Ecology: study of interactions btwn org. s & btwn org. & their nonliving env: ecologists study these interactions @ diff. levels. Individual: a single org. of a particular species, exp. one wolf. Population: a group of individs. of same species living/interacting in same region, exp. pack of wolves. Community: interacting pop. s of diff. species, exp: wolves prey on moose, ticks infest moose, moose feed on trees. Ecosystem: species interacting w/ other species & the env, exp: moose eat treese, changing vegetation which changes landscape for other animals & hot summers reduce ability of moose to feed affecting their winter survival. Way org. s: distributed in geographic space, depends on resources & interactions: other members of pop, few org. s fall into strictly one category. Random: individs: equally likely to be anywhere within area (exp. moose) Clumped: high-density clumps: separated by areas of low abundance (exp. fish) Uniform: individ. s maximize space btwn them by being uniformly spaced (exp. penguins)
