Relict

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Related to Relicts: Relict distribution, Relict species

relict

1. Ecology
a. a group of animals or plants that exists as a remnant of a formerly widely distributed group in an environment different from that in which it originated
b. (as modifier): a relict fauna
2. Geology
a. a mountain, lake, glacier, etc., that is a remnant of a pre-existing formation after a destructive process has occurred
b. a mineral that remains unaltered after metamorphism of the rock in which it occurs

Relict

(rel -ikt) A Soviet space mission launched in 1983 that made the first measurement of dipole anisotropy in the cosmic microwave background radiation.

Relict

 

an animal or plant species that exists in a given country or region as a remnant of the flora and fauna of past geological ages and that in some way is anomalous with regard to present-day conditions of existence. Relicts are identified by their ties to the plant and animal world of past ages or to definite types of vegetation. Thus, species that have been preserved without visible changes at least since the Pliocene are called Tertiary or, more correctly, Neogenic relicts.

In Colchis there are a number of remnant tree species (wing nut, zelkova, chestnut) and evergreen shrubs. The ironwood is a relict in the Talysh Mountains, and the muskrat is a relict in the Volga and Ural basins. Forest relicts in the arctic are species that advanced far to the north during the warm interglacial age and stayed there surrounded by tundra (twinflower, whortleberry, certain wintergreens). Glacial relicts are plants and animals that have survived from the ice age on a given territory.

Plant and animal species that have been preserved only in certain sectors of formerly large ranges and in this sense resemble relicts are called pseudorelicts.

A. I. TOLMACHEV

relict

[′rel·ikt]
(biology)
A persistent, isolated remnant of a once-abundant species.
(geology)
Referring to a topographic feature that remains after other parts of the feature have been removed or have disappeared.
Pertaining to a mineral, structure, or feature of a rock which represents features of an earlier rock and which persists in spite of processes tending to destroy it, such as metamorphism.
References in periodicals archive ?
Its recent distribution is interpreted as relict (Spitzenberger 1990) and presumably results from range dynamics during the Pleistocene (Hewitt 2004).
Instead of a crown of multicellular groups rising over relicts on long branches, the organisms "coalesced in a small number of very large groups," he says.
Body size and weight were not significantly correlated with either the proportion of functional ovarian follicles or the number of follicular relicts (eggs laid) (Table 1), with all correlations < [+ or -] 0.
The volcanism started with the formation of the El Cobano shield-volcano in the SE part of the study area, which is preserved as a relict of a sequence of basaltic lavas, approximately 300 m thick.
This community consists of numerous relict spiders, such as Bathyphantes simillimus buchari Ruzicka 1988, Diplocentria bidentata (Emerton 1882) and Lepthyphantes tripartitus Miller & Svaton- 1978, possibly persisting in these cold screes from the early postglacial period.
One could attribute these populations in Michigan to such releases, except there are arguments that some of these populations may be relicts from hypsithermal times (Holman 1994).
Or second, peripheral populations might represent surviving relicts of a previous Pleistocene distribution (Benedict et al.
However, numerous relicts of this early line and others can still be found on the landscape of Tuscumbia and Sheffield.
A depositional environment existed on the eastern side of Les Iles de la Madeleine which permitted long, parallel foredune ridges to form and to be preserved as relicts due to the protection provided by subsequent ridges.
The high percentages of M and M-IT species in the Negev Highlands (district 15) were attributed by Danin and Plitmann (1987) to the presence of many relicts (Danin, 1972) of moister climates in crevices of smooth-faced outcrops of limestone and in wadis.