BIOL 1102 Lecture 32: Lecture 32
Document Summary
Examples are feeding or nesting territories: random, no pattern. Often plant species with wind dispersal of seeds: why dispersion pattern is most common in animals, animals tend to be clumped, why, many species social. Low survivorship early in life: example: oak trees, do males and females of the same species have the same survivorship curves, curves usually similar, but life expectancy often different, fertility/fecundity: age-specific summary of the reproduction in a population. In many species, bigger females lay more eggs. In conservation, we should protect the most fecund age classes. Iteroparity: small numbers of offspring produced several times, life history tradeoffs, survival and reproduction, there is a physiological cost to reproduction, offspring quantity vs offspring quality, two extremes in life history strategies r-related species, rapid growth, reproduction. Prefer disturbed environments (weedy species: k-selected species, slow growth/ reproduction. Individual fitness decreases as population density increases: predators, diseases/parasites, accumulation of wastes, competition (territory, food, etc. , allee effect.
