BIO220H1 Lecture Notes - Lecture 16: Logistic Function, Inflection Point, Exponential Growth

43 views6 pages
14 Mar 2016
qq919649100 and 40133 others unlocked
BIO220H1 Full Course Notes
BIO220H1 Full Course Notes
Verified Note
38 documents

Document Summary

Lecture 16: ecology and evolution of harvested populations. Simple models of species growth and harvesting strategies. Model for how populations grow: the general rule. Harvest out the recruitment and leave the stock alone. Stock: the current population: simple model for population growth. Dt = change in time (thus dn/dt = change in abundance over time) R = intrinsic rate of population growth of the species. K = carrying capacity (overall number of individuals the habitat can support) When n approaches k, the rate becomes 0, as the number of individual species approaches the absolute limit that it can support, population growth will slow. As n 0, dn/dt rn dn dt. Real populations seem to exhibit this population growth: density-dependent growth rate can limit population size, tern carrying capacity on islands is limited by nesting space, while it"s not perfect, you can see the logistic growth pattern in life.