Population Ecology. Populations of species are described by density, spatial distribution, and growth rate . Population Density. is the number of organisms per unit area Population density of cattle egrets is greater near the buffalo than farther away. . Spatial distribution.
Genetic Diversity variety of genes or inheritable characteristics that are present in a population
Overexploritation process of increase the current rate of extinction by excessive use, or species that have economic value
Biological magnification is the increasing concentration of toxic substances in organisms as trophic levels increase in a food chain
Eutrophication occurs when fertilizers animal waste, sewage or other substance rich in nitrogen and phosphorus flow into waterways.