Define the Following Words of Population Dynamics Flashcards

•the number of individuals within a population per unit area -High densities make it easier to find mates, but increase competition, and vulnerability to predation -Low densities make it harder to find mates, but individuals enjoy plentiful resources and space

Spatial arrangement of organisms within an area.Random, uniform, and clumped

Proportion of males to females

The number of organisms of each age within a population.

Number of birth/deaths per 1,000 individuals in a given time period

The likelihood of death which varies with age. -Type I: More deaths at older ages -Type II: Equal number of deaths at all ages -Type III: More deaths at young ages

Births within a population

Deaths within the population

Arrival of individuals from outside the population

Departure of individuals from the population

(crude birth rate +immigration rate)-(crude death rate +emigration rate)

- The increase of a population by a fixed percentage each year.

•physical, chemical and biological characteristics that restrain population growth -Water, space, food, predators, and disease

The collective force of limiting factors, which together stabilize a population size at its carrying capacity.

•limiting factors whose influence is affected by population density - Increased risk of predation and competition for mates occurs with increased density