IMG_NEW_0018 - Superior predator parasite disease avoidance...

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3 Species diversity o Diversity refers to the variety of species that make up a community . Diversity has two important comjonents:- Osnecies richness O netative abundance +"t!+d, OWy"'l I Ferne Trophic Structure (Real life is messy!| furv,rr1 W -IS fht'{ tqsn"nvrs # f,or"'rL -) fia*l6i"on- -) Wt^W, 2 Tqlaa\^r1 J Species with a large impaci +->-Tetril'ur4 * 4frStl+tq r',-, ->'bo,irJ,n€*affit S"-duJ Ciltst'ltrl Ct'-rW;wvS- YAL A,J I o Dominant species: - The most abundant species in a community o Explanations: - Superior competitive ability
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Unformatted text preview: - Superior predator / parasite / disease avoidance o tnvasive Exotics: 4t+t>q4_- Species introduced intentionallly or accidently by humans- Release from native predators can improve competitive ability Keystone Species o Keystone species exert a strong control on community structure; the effect is disproportionate to their number o Review Robert Paine's experiments on M. californionus distribution and Figure 54.15 in your text. o You should also be familiar with the sea otter example in your text!...
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This note was uploaded on 12/27/2011 for the course MBB 222 taught by Professor Briscoe during the Fall '10 term at Simon Fraser.

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