Allopatry

Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

Related to Allopatry: sympatry

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Allopatry

a widely distributed type of species formation in which new species arise from populations with nonoverlapping areas. Any population or group of populations which has been isolated geographically for an extended period of time inevitably acquires specific characteristics associated with genetic changes, mainly with differences in the direction and intensity of natural selection. In the Galapagos Islands, for example, species of finches have appeared which have adapted to living on a particular food. Some of them have developed into insectivores, others into granivores. In this instance, territorial isolation favored the speedy rise of new species.

Interbreeding upon encounter, and consequently the exchange of genetic information and leveling of the differences which have appeared, cannot take place if the isolation of the allopatric groups is total and the deviation has become rooted in heredity. In such cases, allopatric forms are recognized as new species. For example, species of herring gulls interconnected by a chain of subspecies do not interbreed in the wild while intermingling in the Baltic area. Allopatry may be inherent in groups either above or below the species level. There are transitional stages between allopatry and sympatry.

REFERENCES

Cain, A. Vid i ego evoliutsiia. Moscow, 1958. (Translated from English.)
Zavadskii, K. M. Vid i vidoobrazovanie. Leningrad, 1968.
Mayr, E. Zoologicheskii vid i evoliutsiia. Moscow, 1968. (Translated from English.)

A. V. IABLOKOV

Mentioned in ?

References in periodicals archive ?

The question addressed here is whether species in the Maui Nui clade formed through diversification within the single volcano of East Maui or alternatively whether divergence occurred in allopatry, prior to their current distribution.

Geographical context of speciation in a radiation of Hawaiian Tetragnatha spiders (Araneae, Tetragnathidae)

Distance (mean [+ or -] SE) between summer and winter locations (allopatry) and net displacement (ND; sensu Bunnefeld et al.

Moose movement patterns in the upper Koyukuk River drainage, Northcentral Alaska

Despite the initial popularity of this concept of "character displacement," the phenomenon and its dual, "character release" (Grant 1972) in areas of allopatry from a competitor, were widely seen for many years as uncommon at best, and alternative explanations for geographic variation are often available (Grant 1972).

CHARACTER DISPLACEMENT AND RELEASE IN THE SMALL INDIAN MONGOOSE, HERPESTES JAVANICUS

The increase in the number of described Hemibrycon species from the Cauca-Magdalena River system, most of which exist in allopatry, suggests an interesting model for diversification of this genus in the Andes (Roman-Valencia & Arcila-Mesa 2009).

Tres nuevas especies de Hemibrycon (Characiformes: Characidae) de la cuenca del rio Magdalena, Colombia

xerampelinus occurs in allopatry (Volcan Baru and Cerro de la Muerte) or where the two species meet (Volcan Irazu).

Cost of advertising: long-tailed weasels (Mustela frenata) as potential acoustically-orienting predators of neotropical singing mice (Scotinomys)

The great variation in ecological conditions, displacement during climatic changes, fragmentation during geological events, as well as allopatry derived from a very complex orography may have favored differentiation of Phaulotettix spp., as has occurred in other insect groups.

New species of Z(Orthoptera: Acrididae) from northeastern Mexico

Although these two taxa are not sister species and the boundary between the Great Fish and Kei catchments therefore not a vicariant feature contributing to speciation, it may well now limit dispersal and maintain the allopatry of these lineages.

Afrorhytida kraussi oraria subsp. n

not hold for all angiosperms, particularly if only allopatry is

Optimization theory in plant evolution: an overview of long-term evolutionary prospects in the angiosperms

Clear competitive release in allopatry occurred for S.

CONDITION-SPECIFIC COMPETITION: IMPLICATIONS FOR THE ALTITUDINAL DISTRIBUTION OF STREAM FISHES

Differentiated populations or incipient species currently separated by obvious geographic barriers provide some of the best evidence that allopatry is a common geographic mechanism of speciation (Mayr 1942; Carson and Kaneshiro 1976; Grant 1986; Lessios and Cunningham 1990; Knowlton et al.

Historical allopatry and the biogeography of speciation in the prosobranch snail genus Nucella

Amaral's (1944) arrangement is not followed here because of the absence of allopatry among the color pattern types.

Taxonomy and geographic variation of Liophis poecilogyrus (Wied) from South America (Serpentes: Colubridae)

Full browser ?

CITE

Site: Follow: Share:

Open / Close