High Sensitivity of the Antarctic Rotifer Adineta editae to Metals and Ecological Relevance in Contaminated Site Risk Assessments

Kathryn E. Brown; Darren J. Koppel; Gwilym A. V. PriceCatherine K. KingMerrin S. AdamsDianne F. Jolley

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High Sensitivity of the Antarctic Rotifer Adineta editae to Metals and Ecological Relevance in Contaminated Site Risk Assessments

机译：High Sensitivity of the Antarctic Rotifer Adineta editae to Metals and Ecological Relevance in Contaminated Site Risk Assessments

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Anthropogenic activities in Antarctica have led to contamination of terrestrial sites, and soils in ice‐free areas haveelevated concentrations of metals, particularly around current and historic research stations. Effective management of Antarcticcontaminated sites depends on the assessment of risks to a representative range of native terrestrial species. Bdelloid rotifers arean abundant and biodiverse component of Antarctic limnoterrestrial communities and play a key role in nutrient cycling inAntarctic ecosystems. The present study investigates the toxicity of five metals (cadmium, copper, nickel, lead, and zinc) to theendemic bdelloid rotifer Adineta editae, both singly and in metal mixtures. Based on the concentrations tested, zinc was themost toxic metal to survival with a 7‐day median lethal concentration (LC50) of 344 μg Zn/L, followed by cadmium with a 7‐dayLC50 of 1542 μgCd/L. Rotifers showed high sensitivity using cryptobiosis (chemobiosis) as a sublethal behavioral endpoint.Chemobiosis was triggered in A. editae at low metal concentrations (e.g., 6 μg/L Pb) and is likely a protective mechanism andsurvival strategy to minimize exposure to stressful conditions. Lead and copper were most toxic to rotifer behavior, with 4‐daymedian effect concentrations (EC50s) of 18 and 27 μg/L, respectively, followed by zinc and cadmium (4‐day EC50 values of 52and 245 μg/L, respectively). The response of rotifers to the metal mixtures was antagonistic, with less toxicity observed than waspredicted by the model developed from the single‐metal exposure data. The present study provides evidence that this bdelloidrotifer represents a relatively sensitive microinvertebrate species to metals and is recommended for use in contaminant riskassessments in Antarctica.

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《Environmental toxicology and chemistry /》 |2023年第6期|1409-1419|共11页
作者
Kathryn E. Brown; Darren J. Koppel; Gwilym A. V. PriceCatherine K. KingMerrin S. AdamsDianne F. Jolley;
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作者单位

Australian Antarctic Division, Kingston, Tasmania, Australia;

CSIRO Environment, Lucas Heights, New South Wales, Australia,Australian Institute of Marine Science, Crawley, Western Australia, Australia;

Australian Antarctic Division, Kingston, Tasmania, Australia,CSIRO Environment, Lucas Heights, New South Wales, AustraliaCSIRO Environment, Lucas Heights, New South Wales, Australia;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
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关键词
Terrestrial invertebrate toxicology; Soil contamination; Metal toxicity; Antarctic contamination risks; Metal mixture; Bdelloid rotifers;

High Sensitivity of the Antarctic Rotifer Adineta editae to Metals and Ecological Relevance in Contaminated Site Risk Assessments

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