Life Zone

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life zone

[′līf ‚zōn]
(ecology)
A portion of the earth's land area having a generally uniform climate and soil, and a biota showing a high degree of uniformity in species composition and adaptation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Life Zone

 

one of the large subdivisions of the biosphere; a spatially expressed complex of abiotic, mainly climatic, factors and groups of plants and animals that have adapted to them. The concept of the life zone was introduced by the American scientist C. H. Merriam in 1890.

On land, a distinction is made between horizontal life zones (tundra, taiga, steppe, and so on) and vertical life zones. The latter are found in mountain areas (alpine meadows, mountain forests, and so on). Life zones in the oceans are longitudinal (two polar zones with constant low temperature and floating ice, two temperate zones with sharp seasonal temperature fluctuations, and one equatorial zone with constant high temperature) and vertical (littoral, sublittoral, deep-sea, abyssal, and so on). The fact that life zones are insufficiently distinguished from topographical zones has led to a failure to use the term “life zone.”

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
aratathomasi characterize a premontane and montane lifezone (1650 to 2800 meters--Alberico, 1987; Soriano and Molinari, 1987).
Rim was a born restaurateur who never hesitated to cook on special order, said Dunham, who also is a partner in the LifeZone 360 Sports Complex in West Dundee.
Noon, 1 and 2 p.m.: Multi-Sport experience for age 2 to 5 by LifeZone Cubbies
In West Dundee, the operators of Lifezone 360 sports complex which opened in a repurposed Target Store, 999 W.
In West Dundee, the operators of Lifezone 360 sports complex, which opened in a repurposed Target Store, 999 W.