4. Ecology of Freshwater Nematodes

Traunspurger, Walter

doi:10.1515/9783110274257.153

Cited by 2 publications

(1 citation statement)

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“…Nematodes are an extremely diverse taxon and the dominant group within the meiofauna. 13 Their well-studied species Caenorhabditis elegans has been frequently used to quantify the deleterious effects of trace metals and organic pollutants on a wide range of end points including mortality, reproduction, growth, behavior, population growth, gene expression, and metabolism. C. elegans feeds on bacteria by drawing liquid with suspended particles into its pharynx (pharyngeal pumping).…”

Section: ■ Introductionmentioning

confidence: 99%

Phenanthrene Bioaccumulation in the Nematode Caenorhabditis elegans

Spann

Goedkoop

Traunspurger

2015

Environ. Sci. Technol.

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The contribution of food to the bioaccumulation of xenobiotics and hence toxicity is still an ambiguous issue. It is becoming more and more evident that universal statements cannot be made, but that the relative contribution of food-associated xenobiotics in bioaccumulation depends on species, substance, and environmental conditions. Yet, small-sized benthic or soil animals such as nematodes have largely been disregarded so far. Bioaccumulation of the polycyclic aromatic hydrocarbon phenanthrene in the absence and presence of bacterial food was measured in the nematode Caenorhabditis elegans. Elimination of phenanthrene in the nematodes was biphasic, suggesting that there was a slowly exchanging pool within the nematodes or that biotransformation of phenanthrene took place. Even with food present, dissolved phenanthrene was still the major contributor to bioaccumulated compound in nematode tissues, whereas the diet only contributed about 9%. Toxicokinetic parameters in the treatment without food were different from the ones of the treatment with bacteria, possibly because nematodes depleted their lipid reserves during starvation.

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Section: ■ Introductionmentioning

confidence: 99%