The phrase "autochthonous sources" is correct and usable in written English.
It can be used in contexts discussing origins, particularly in anthropology, ecology, or cultural studies, referring to sources that are native or indigenous to a particular place.
Example: "The research focused on autochthonous sources of knowledge that have been passed down through generations in the community."
Alternatives: "indigenous sources" or "native sources".
This may help explain why the relative contribution of autochthonous sources towards fish production declined in sites where forest cover and hence DOC were consistently higher.
Core to intact ratios and the weak correlation between I-GDGT derived BIT values and carbon isotope signatures suggest a mixture of allochthonous and autochthonous sources of GDGTs in riverine and marine environments.
Overall, our model closely predicted site-level isotopic ratios (R2 for posterior means=0.47 0.99; Bayesian R2 incorporating residual uncertainty=0.45 0.58; Supplementary Fig. 4), and stable isotope ratios of littoral zooplankton and benthic periphyton were distinct from those of leaf litter, allowing us to separate terrestrial resources from autochthonous sources (Supplementary Fig. 5).
The Corg from continuous meadows was also more 13C enriched, which suggests that a high proportion of the carbon was derived from plant material (autochthonous sources); in contrast in patchy meadows (especially in a sand matrix), lower δ13C values indicated a higher contribution from allochthonous sources (mainly suspended particulate organic matter, SPOM).
However, this is not a straightforward task because of the diversity of allochthonous and autochthonous sources that can supply P-PO4 to river sediments as well as the existence of in-stream processes that can change the speciation of these inputs and obscure the original sources.
Nutrient biogeochemistry of mangroves are primarly driven by both allochthonous and autochthonous sources.
Overall, the lipid biomarker signatures of intact sediments were biased towards the autochthonous source because many of the organic compounds indicative of degraded, terrigenous sources were protected from extraction and saponification by organo-mineral matrices.
We find significant differences in concentrations and fractional abundances of brGDGTs between soil and river sediment samples from the catchment and lake sediments, indicating a mostly autochthonous source for lacustrine brGDGTs.
Their genetic relatedness with Czech strains from domestic pigs and wild boars and patient recollections suggest an autochthonous source likely linked to consumption of contaminated pork.
In particular, the analysis of successful invasive species and of their autochthonous source populations by means of genetic, phylogeographic and demographic tools can provide novel insights into the study of biological invasion patterns.
To determine whether the infections in Europe were acquired from an autochthonous source or associated with travel, we used multilocus sequence typing to compare 100 isolates from Europe (57 from 40 human patients, 22 from the environment, and 21 from animals) with 191 isolates from around the world.
