Old field (ecology)

Old field is a term used in ecology to describe lands formerly cultivated or grazed but later abandoned. The dominant flora include perennial grasses, heaths and herbaceous plants. Old fields are canonically defined as an intermediate stage found in ecological succession in an ecosystem advancing towards its climax community, a concept which has been debated by contemporary ecologists for some time.^[1]

Old field sites are often marginal lands with soil quality unsuitable for crops or pasture. Examples include abandoned farmlands in central Ontario, along the edge of the Canadian Shield.

Stress tolerant species with wide seed dispersal ranges are able to colonize cultivated fields after their initial abandonment, usually followed by perennial grasses.^[2] The succession of old fields culminates in takeover by trees and shrubs.^[3]

See also

• Brownfield land: abandoned or underused industrial and commercial facilities
• Greenfield land: undeveloped land in a city or rural area
• Indian old field: land formerly occupied or used by Native Americans in the United States
• Urban prairie: vacant urban land that has reverted to green space

References

• Core, Earl L. (1949), "Original Treeless Areas in West Virginia", J. Elisha Mitchell Sci. Soc., 65:306–310.