Unformatted text preview: ins? N1 K2/ K1 N1 K1 K2/ 2 Option 3
K1/ A) Stable? B) Unstable? K2 K1/ N2 dN2/dt = 0 Option 4
dN2/dt = 0 Stable: True or false? N2 K2 N1 K1 K2/ K2/ N1 K1 WHAT DO THESE GRAPHS TELL US? THE TWO POSSIBLE EQUILIBRIUM OUTCOMES: 1). Coexistence. When there is very little competitive overlap: If both Coexistence. aii are << 1 : species very likely to coexist 2) Competitive Exclusion. If aii is >> 1 for either species, one species Exclusion. will usually outcompete the other 3) Competitive Exclusion. If aii = 1, then the outcome will depend on: Exclusion. a) initial abundance, b) K of each species, and c) chance events a relates to how similar species are to one another.... another... Convince yourself: (recall = a12 and =a21) Coexistence among competitors occurs when: 1. Interspecific competition is weak relative to intraspecific competition. competition 2. Species are more selflimiting than selfothe...
View
Full Document
 Spring '09
 SchwartzandKeen
 Ecology, Evolution, Ecological niche, Interspecific competition, Competitive exclusion principle

Click to edit the document details