Tyre particle exposure affects the health of two key estuarine invertebrates.

Tyre particle exposure affects the health of two key estuarine invertebrates.
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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:
1987)
影响因子:
--
通讯作者:
Garrard SL
Garrard SL
中科院分区:
--
文献类型:
--
作者:
Garrard SL

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轮胎磨损颗粒可能是自然环境中微塑料的最大来源,但关于它们的生物影响的信息不足。将河口两种关键的无脊椎动物--平纹扇贝和杂色沙蚕暴露于底泥中10%的轮胎颗粒中,连续3天。尽管如此,这两个物种都消耗了这些颗粒。飞机的消耗是原来的25倍。杂色(967个与35个颗粒。g−1湿重)。然后,我们调查了21天暴露在河口沉积物(0.2%、1%和5%干重沉积物)中不同浓度的轮胎颗粒对健康OFS的影响。平面和H。多姿多彩。观察到喂食率和埋藏率都有所下降。但什么都没有。虽然两个物种都表现出蛋白质含量的下降,以响应最大的轮胎颗粒浓度(5%),与减少18%的能量储备有关。多姿多彩。5%的轮胎颗粒暴露导致大鼠组织中总谷胱甘肽的增加。消化腺中的脂质过氧化反应减少。Plana,可能是由于细胞周转增加所致。这项研究发现了这一点。普兰的健康在较低的浓度下受到影响。颜色多样,可能是因为它消耗了大量的沉积物。在高暴露浓度(5%)下,两种无脊椎动物的健康都受到了影响。这项研究没有将微塑料颗粒造成的影响与从这些颗粒中浸出的化学添加剂的影响分开,但我们的结果确实表明,未来的研究应该单独和联合调查影响,以确定毒性的主要驱动因素。
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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