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 absence of a visible silt-sized quartz component in the sandstone suggests that this fraction in the saprolite is allochthonous with respect to the study site.
Allochthonous beds from the lower Caledonian nappes, which were transported a fairly short distance from the west, have the same character (Karis 1982).
The variation in the TDS is an indication of the varying contributions of allochthonous and autochthonous inputs to the dam.
Therefore we would expect to have lower C/N values in the sediments during times of higher eutrophication due to algal blooms, but an increase in the input of allochthonous organic matter from the catchment and higher aquatic plants could mask this.
Heterotrophic activity is also lower in desert river environments due to the reduced input of allochthonous sources of OC under low-rainfall conditions (Fellows et al.
In this study, we tested an allochthonous strain, Saccharomyces cerevisiae PTCC 5052 on growth factors an survival of rainbow trout (Oncorhynchus mykiss) that is a new experiment on rainbow trout in Iran.
These preferences might have favored the success of these organisms during the high water period due to the great accumulation of allochthonous organic matter (JUNK et al.
The layers are identical to Schweger's unit 3, but Schweger subdivided it into three subunits from bottom to top: subunit 3A consists of humidified allochthonous peat formed from organic rich cultural and agricultural debris.
34]S distribution and range among the freshwater fishes suggest that both autochthonous and allochthonous (terrestrial C3 photosynthetic production and MDN) nutrient sources are important to the tidal freshwater fish community.
There has been a suggestion that some komatiites are allochthonous, i.
Thus, the aims of this study were to: (i) characterise the morphological and mineralogical properties of fine material trapped in 3 source-bordering sand dunes on the Lachlan floodplain at Hillston; (ii) determine whether this fine material is of a local or allochthonous origin; and (iii) ascertain whether the dunes contain intact pelletal clay aggregates consistent with Butler's (1956) model of parna formation.