allochthonous


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allochthonous

[ə′läk·thə·nəs]
(ecology)
Pertaining to organisms or organic sediments in a given ecosystem that originated in another system.
(petrology)
Of rocks whose primary constituents have not been formed in situ.
References in periodicals archive ?
The limestones at this site belong to the fragmentary Konice-Mladec Belt in central Moravia which contains discrete allochthonous fragments and megablocks of Devonian sedimentary rocks which were slightly metamorphosed and detached together with partly preserved Neoproterozoic basement rocks and the overlying Mississippian facies.
Lithologically the allochthonous rocks are mostly composed of sandstone, siltstone, greensand, siliceous mudstone, argillaceous micritic limestone and rare coal measures along with dispersed organic matter.
13]C values suggested increased importance of autochthonous energy sources compared to the river that used a greater proportion of allochthonous sources as demonstrated through increasingly positive [delta] [sup.
33) In their work Roggeband and Verloo reveals that emancipation policies have been ethnicized and minority and integration policies have been gendered because the focus has shifted from the emancipation of the Dutch women to allochthonous (34) women and integration of the migrants was specified into the Muslim women.
The latter authors state that values in two Astyanax species were higher during the wet season, which may be related to a greater supply of allochthonous food during this period.
In general, streams habitats are highly variable and strongly influenced by riparian vegetation which reduces autotrophic production by shading and contributes large amounts of allochthonous detritus.
With the persistence of probiotics often questioned, the results of the study, "Comparison of the Colonization Ability of Autochthonous Allochthonous Strains of Lactobacilli in the Human Gastrointestinal Tract.
The presence of allochthonous ultramafic rocks is one of the most original characteristics of the northeastern Portugal geology (IGLESIAS & al.
1932) alkaline dystrophic waters are shallow and are formed by wind erosion; are often dark (grey or brown) with very little light penetration; the pH is usually above 8; they are rich in suspended organic material from allochthonous origin; and support very few organisms.
Caves are nutrient limited ecosystems and the majority of resources available are from allochthonous materials brought in from the surrounding environment.