Microplastic fibers transfer from the water to the internal fluid of the sea cucumber Apostichopus japonicus
Microplastic fibers transfer from the water to the internal fluid of the sea cucumber Apostichopus japonicus
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微塑料纤维从水中转移到海参的内部液体中
DOI：
10.1016/j.envpol.2019.113606
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发表时间：
2020
影响因子：
8.9
通讯作者：
Hongsheng Yang
中科院分区：
文献类型：
--
作者：
Mohamed Mohsen;Libin Zhang;Lina Sun;Chenggang Lin;Qing Wang;Hongsheng Yang
微塑料(MPS)是直径小于5 mm的小塑料颗粒。微纤维(MFS)形式的MPS在水生生境中被广泛检测到，并对环境造成了高度关注。尽管有很多关于MFS对海洋动物影响的报道，但它们对海参的影响仍然不清楚。此外，我们先前的野外研究表明，MFS可能转移到刺参(Apostichous Japan Onicus)的体腔液中。在这里，我们展示了MFS如何转移到海参的体腔液中。在MFS通过呼吸树从水转移到体腔液的过程中，我们捕获了MFS。a.日本血吸虫在呼吸过程中与水一起进入MFS；MFS被困在呼吸树中或转移到体腔液中。转移的MFS在暴露72 h内增加，并在转移到清洁水中后持续72 h。在免疫指标中，溶菌酶(LZM)水平随着MFS的转移而增加，这证实了LZM对陌生物质的防御作用。此外，在暴露后24 h和48 h，总抗氧化能力、丙二醛、过氧化物酶和酚氧化酶的水平没有明显下降，表明氧化失衡程度很小。此外，日本邮政MFS转移的速度和总移动距离没有显著变化。本研究揭示了MFS在日本血吸虫体腔液中的转移和积累。
Microplastics (MPs) are small plastic particles less than 5 mm in diameter. MPs in the form of microfibers (MFs) are widely detected in aquatic habitats and are of high environmental concern. Despite many reports on the effects of MFs on marine animals, their effect on sea cucumbers is still unclear. In addition, our previous filed study has shown that MFs may transfer to the coelomic fluid of the sea cucumberApostichopus japonicus(A. japonicus). Here, we show how MFs transfer to the coelomic fluid of the sea cucumber. We captured the MFs during their transfer from the water to the coelomic fluid through the respiratory tree.A. japonicusingested in the MFs along with the water during respiration; the MFs got stuck in the respiratory tree or transferred to the coelomic fluid. The transferred MFs increased during 72 h of exposure and persisted for 72 h after the transfer to clean water. Among the immunity indices, lysozyme (LZM) levels increased in response to the transferred MFs, which confirms the defensive role of LZMs against strange substances. Additionally, non-significantly decreased levels of total antioxidant capacity (T-AOC), malondialdehyde (MDA), peroxidase (POD) and phenol oxidase (PPO) were observed at 24 h and 48 h post-exposure, suggesting minimal oxidative imbalance. Furthermore, there were no significant changes in the speed and the total distance moved byA. japonicuspost MFs transfer. This study revealed that MFs transfer and accumulate in the coelomic fluid ofA. japonicus.