ENVS 1000U Lecture Notes - Lecture 6: Minimum Viable Population, Exponential Growth, Energy Flux
27 Jan 2020
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Document Summary
Ecosystem energy flux and cycling of nutrients. Population population dynamics; the unit of evolution. Organism survival and reproduction; the unit of natural selection. Population group of the same species that live in a particular area and share resources. Population dynamics (changes in a population over time) are affected by these characteristics: population size, population density, population distribution, population demographics, sex ratio, age structure, survivorship. Population size: number of individual organisms at a given time. Minimum viable population smallest number of individuals that would still allow a population to persist/grow. Population density: number of individuals within a population per unit space. Population distribution: clumped = based on resources or habitat, random = resources found throughout habitat with little competition, uniform = individuals compete for resources and space. Assumes that a population has unlimited resources. Occurs in nature with a small population under ideal conditions. Limiting factors slow down the growth rate.
