Sensitivity to Copper and Development of Culturing and Toxicity Test Procedures for the Antarctic Terrestrial NematodePlectus murrayi
| Autor: | Kathryn E. Brown, Catherine K. King, Jane Wasley |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Nematoda Environmental remediation Health Toxicology and Mutagenesis Antarctic Regions chemistry.chemical_element 010501 environmental sciences Ecotoxicology 010603 evolutionary biology 01 natural sciences Soil chemistry.chemical_compound Toxicity Tests Animals Soil Pollutants Environmental Chemistry Ecosystem 0105 earth and related environmental sciences biology Contamination biology.organism_classification Copper Soil contamination Nematode chemistry Environmental chemistry Toxicity Environmental science Water Pollutants Chemical Toxicant |
| Zdroj: | Environmental Toxicology and Chemistry. 39:482-491 |
| ISSN: | 1552-8618 0730-7268 |
| Popis: | Environmental quality guideline values and remediation targets, specific to Antarctic ecosystems, are required for the risk assessment and remediation of contaminated sites in Antarctica. Ecotoxicological testing with Antarctic soil organisms is fundamental in determining reliable contaminant effect threshold concentrations. The present study describes the development of optimal culturing techniques and aqueous toxicity test procedures for an endemic Antarctic soil nematode, Plectus murrayi, which lives within interstitial waters between soil particles. Toxicity tests were of extended duration to account for the species' physiology and life-history characteristics. Plectus murrayi was sensitive to aqueous copper with a 50% effective concentration for egg-hatching success of 139 µg/L. Hatched juveniles that were first exposed to copper as eggs appeared to be less sensitive than those first exposed at the hatched J2 stage, indicating a potential protective effect of the egg. Sensitivity of juveniles to copper increased with exposure duration, with 50% lethal concentrations of 478 and 117 µg/L at 21 and 28 d, respectively. The present study describes new methods for the application of an environmentally relevant test species to the risk assessment of contaminants in Antarctic soil and provides the first estimates of sensitivity to a toxicant for an Antarctic terrestrial microinvertebrate. Environ Toxicol Chem 2020;39:482-491. © 2019 SETAC. |
| Databáze: | OpenAIRE |
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