BIOL 1001 Chapter : 07-Sep
Document Summary
Human population growth is exponential, and r is increasing. We"re increasing at an increasing rate, meaning we"re increasing in shorter and shorter amount of time. Baby boomers are an example of a cohort. Density independent factors limit population size regardless of population density. Density dependent factors do control population: predation, parasitism, competition. Intraspecific (ie two squirrels fighting for a piece of trash: within species, increases with density. Interspecific (ie squirrel versus bird: between species (community ecology, can also increase with density. **logistic growth=limited resources: keeping competitive exclusion in mind-how are there so many species, complicatied answer, but niche partitioning is important (split up the resources, and allows for competitors to coexist, macarthur"s warblers are classic example. Predation is another way to limit population: community ecology, top-down control when a predator eats prey, the predator is the. Other pairwise interactions: parasitism (there"s a bug that uses an ant to get to birds.
