BIOA02H3 Lecture Notes - Lecture 5: Exponential Growth, Logistic Function
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BIOA02H3 Full Course Notes
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Define the significance of all red terms: the influence of births, deaths, emigration and immigration on population size: In an open system, individuals can leave or enter the population. The population grows in an unlimited environment which is an environment that has an infinite number of resources such as food and shelter. Population is known and can be monitored at all times. In a closed system individuals do not exchange any matter with their surroundings, i. e. , there is no dispersal. Is an estimate" model where the population is not known (difficult to count): a population growth rate is the change in the number of individuals over time. Can be simplified to: r constant in exponential growth, only n gets larger, to estimate future populations, we use another formula, organisms with a higher r grow faster. K depends on: food, space, water, soil quality, resting / nesting sites, life history strategies.
