Related Words

Species Richness: The number of species present in a community.

Species Diversity: The number of living species on Earth.

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

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 Packing: The phenomenon in which present-day communities generally contain more species than earlier communities because organisms have evolved more adaptations over time.

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

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

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

Subspecies: A taxonomic subdivision of a species; a population of a particular region genetically distinguishable from other such populations and capable of interbreeding with them.

Yucca Root (Yucca species): Anti-inflammatory for arthritis.