Tyre particle exposure affects the health of two key estuarine invertebrates.
Tyre particle exposure affects the health of two key estuarine invertebrates.
复制标题
轮胎颗粒暴露会影响两种主要河口无脊椎动物的健康。
DOI:
10.1016/j.envpol.2022.120244
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Garrard SL
中科院分区:
文献类型:
--
作者:
Garrard SL
Tyre wear particles may be the largest source of microplastic to the natural environment, yet information on their biological impacts is inadequate. Two key estuarine invertebrates; the clamScrobicularia planaand the ragwormHediste diversicolorwere exposed to 10% tyre particles in sediment for three days. Both species consumed the particles, althoughS. planaconsumed 25x more thanH. diversicolor(967 compared with 35 particles.g−1wet weight, respectively). We then investigated the impact of 21 days exposure to different concentrations of tyre particles in estuarine sediments (0.2, 1, and 5% dry weight sediment) on aspects of the health ofS. planaandH. diversicolor. Reductions in feeding and burial rates were observed forS. planabut notH. diversicolor, whilst both species showed a decrease in protein content in response to the greatest tyre particle concentration (5%), linked to an 18% decrease in energy reserves forH. diversicolor. Five percent tyre particle exposure led to an increase in total glutathione in the tissues ofH. diversicolor, whilst lipid peroxidation decreased in the digestive glands ofS. plana,possibly due to an increase in cell turnover. This study found thatS. plana'shealth was impacted at lower concentrations thanH. diversicolor, likely due to its consumption of large quantities of sediment. At the high exposure concentration (5%), the health of both invertebrates was impacted. This study did not separate the effects caused by the microplastic particles versus the effects of the chemical additives leaching from these particles, but our results do indicate that future studies should investigate effects in isolation and in combination, to determine the main drivers of toxicity.
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