Definition: Common species and uncommon species are designations used in ecology to describe the population status of a species. Commonness is closely related to abundance. Abundance refers to the frequency with which a species is found in controlled samples; in contrast, species are defined as common or uncommon based on their overall presence in the environment. A species may be locally abundant without being common.
Definition: Ruderal or weedy species are the first to colonize disturbed areas. They are fast-growing and rapidly complete their life cycles, and generally produce large numbers of offspring.
