Population Dynamics: Exponential and Logistic Growth Models - Prof. Alice A. Winn, Study notes of Biology

Download Population Dynamics: Exponential and Logistic Growth Models - Prof. Alice A. Winn and more Study notes Biology in PDF only on Docsity! I. Ecology of Populations A. Population properties B. Population dynamics 1. Why study population dynamics 2, Processes that determine population dynamics 3. Models of population growth a. The exponential model b. The logistic model Ecology the study of the distribution and abundance of organisms (a) Clumped (b) Uniform ‘Copyright © Pearson Education, Inc., publishing as Banjamin Cummings. (c) Random ∆N/∆t = B – D + I – Eirths eaths mmigration migration dN/dt = rN r > 0 population will grow r = 0 population won’t change r < 0 population will shrink dN/dt = r N [(K - N)/K] For: r=0.1 K=100 if N = 10 dN/dt = .1 (10) [(100 - 10)/100] = .1 (10) (.9) = .9 if N = 99 dN/dt = .1 (99) [(100 - 99)/100] = .1 (99) (.01) = .099 Fig. 52.11 The patterns of exponential and logistic population growth