Glossary of "Ecology (6th ed.)" by Krebs (2009)
- a genetic subspecies or race of a plant or animal species that is adapted to a specific set of environmental conditions such as temperature or salinity.
Glossary of "Evolution (4th ed.)" by Futuyma & Kirkpatrick (2017)
- A genetically determined phenotype of a species that is found as a local variant associated with certain ecological conditions.
- Futuyma, D. J. & Kirkpatrick, M. 2017. Evolution, 4th ed. -xviii + 602 pp. Sinauer Associates, Inc., Sunderland.
- Krebs, C. J. 2009. Ecology, 6th ed. -xvi + 655 pp. Pearson Benjamin Cummings, San Francisco.