Species: Taxonomic classification below genus. Also a group of individuals considered set apart form other species by consistent differences in morphology, ecology or reproductive behavior.

 

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Species: One or more populations of interbreeding or potentially interbreeding organisms that are reproductively isolated in nature from all other organisms. Populations of individuals capable of int . . . View Full Definition

Sibling Species: Closely related species that are so similar that they are nearly indistinguishable morphologically

Endangered Species: Species of animals or plants likely to go extinct in the foreseeable future unless current trends are altered. They are listed by regulation under the Endangered Species Act and assigned the . . . View Full Definition

Species Diversity: The number of living species on Earth.

Species-Area Effect: A regular logarithmic relationship between the number of species in a confined geographic area (e.g., an island) and the area in which the species occur

Species Abundance: The total number of individual of a species within a given area or community. Compare species richness.

Endangered Species Act (ESA) Of 1973: P.L. 93-205 (December 28, 1973), as amended, is one of the major federal laws protecting species and the ecosystems on which they depend. While states generally have primacy in wildlife law, . . . View Full Definition

Exotic Species: A species that is not native to a region.

Endangered Species Act: Passed by the United States Congress in 1973. The Act was originally intended to protect endangered species on federal lands. Since passage, the Act has been used to prohibit development or . . . View Full Definition

Native Species: A species that occurs naturally in an area (i.e. Is not introduced). Compare introduced species, invasive species.