Card Set Information
Three important characteristics of a population are its geographic distributions, density and growth rate
number of indiciduals per unit area
Three factors can affect population size: the number of births, death rate and number of individuals who leave and enter the population.
occurs when the indiiiduals in a population reproduce at a constant rate
in the prescence of unlimited resourced, a population will grow exponentially.
The largest number of individuals that a environment can support.
As resources become less available, the growth of a population slows or stops.
is a gactor that causes a population growth to decrease,
density dependent factor
depends on population size
: with one another for food and necesities
: as a predator's population decreases, the prey's increases.as the predator's population increasem the prey's decreases
Parastism and disease
: kill and decrease a population
regardless of population size
: have cause disasters (greenhouse)
: extremes of cold or hot can toll on a population. They can also affect the population of the consumers within the food web and affect other consumers