BSCI 106 Lecture Notes - Population Ecology, Life Table
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Population ecology: factors regulating population growth rates and population size. Number (n): number of individuals in population, important for assessing potential for increase in absolute numbers, particular importance in conservation, can be estimated by, ie: mark-recapture method (fig. # captured during s1 & s2 = # captured during s1. Density (n/area or volume: many ecological factors influenced by density of a population, not the absolute number. Dispersion: pattern of spacing among individuals; ie: clumped, uniform, random; fig. Change in n over time=population dynamics (fig. B/ t=bn: per capita death rate: In a population of 100 individuals there are 40 births and 30 deaths in a unit of time. Population characteristics: life history characteristics, individuals not all equivalent ie: age can have big impact on survival/reproduction: survivorship curves (patterns of survival based on age and gender) 53. 5, diff. between males and females within species and. 53. 6 life table: age-specific summary of survival and reproduction patterns in a population fig.