BIOS 230 Lecture Notes - Lecture 17: Metapopulation, Parental Investment, Dendrochronology
Document Summary
Population: a goup of individuals of the same species that inhabit a given area, potential for interbreeding, spatial boundaries. Density, abundance, estimation: density- number that may vary between location, abundance= density x area, number of individuals in the population. Age/stage structure and distribution: age structure- propotion of individuals in different age classes, pre eproductive, reproductive, post reproductive. Spatial distributions of individuals, what it can reveal about the species: random/uniform/clumped. Random- random spacing, flowers in a prarie. Clumbed- shrubs under acadia, schools of fish. Geographic range, factors that limit the range: geographic range encompasses all individuals of a species. Local or subpopulations: environmental heterogeneity divides populations into local or subpopulations. Techniques for aging animals and plants: animals. Growth rings in teeth, horns, ear bones: plants. Age pyramids, what they reveal about how the population is likely to change in the future. Dispersal, passive vs. active: emigration: moving out. Patterns of seed fall around parent plants.
