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dN1/dt = r1N1 (K1 - N1 - ?12 N2)K1. dN2/dt = r2N2 (K2 - N2 - ?21 N1)K2. Species I. r1= intrinsic rate of increase for spp.1N1= pop size for spp. 1K1= carrying capacity for spp. 1N2= population size for spp 2?12= competition coefficient (spp 1 effect on spp 2). Species II. Lotka
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