Physiological and cellular responses of Manila clam Ruditapes philippinarum exposed to different shapes and sizes of polyethylene terephthalate microplastics.

IF 2.7 4区 环境科学与生态学 Q2 ECOLOGY
Hyeonji Nam, Jinyoung Song, Yooeun Chae, Jin Soo Choi, June-Woo Park
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引用次数: 0

Abstract

Microplastics (MPs) are ubiquitous in marine environments and have become a major source of environmental pollution. Although fragmented and fibrous MPs are the most abundant shapes in marine environment, studies on shape- and size-dependent MP toxicity in marine benthic bivalves remain limited. In this study, we aimed to evaluate the chronic effects of different shapes and sizes of polyethylene terephthalate (PET) MPs on Manila clam Ruditapes philippinarum, and investigate their physiological and cellular responses. The mortality of R. philippinarum showed no changes at all concentrations of fragmented and fibrous MPs. The respiration rate of R. philippinarum induced by large fragmented MPs was recovered to the control level at 6 h, however, fibrous MPs significantly decreased compared to the control. In particular, fibrous MPs significantly increased and decreased filtration rate and lysosomal membrane stability, respectively, whereas the fragmented MPs showed no significant differences. These results enhance our understanding of the potential toxicological risks posed by MPs of various shapes and sizes to benthic organisms in marine environment.

不同形状和大小聚对苯二甲酸乙二醇酯微塑料对马尼拉蛤的生理和细胞反应。
微塑料(MPs)在海洋环境中无处不在,已成为环境污染的主要来源。尽管碎片状和纤维状MPs是海洋环境中最丰富的形状,但对海洋底栖双壳类动物形状和大小依赖性MPs毒性的研究仍然有限。在这项研究中,我们旨在评估不同形状和大小的聚对苯二甲酸乙二醇酯(PET) MPs对马尼拉蛤Ruditapes philippinarum的慢性影响,并研究它们的生理和细胞反应。在不同浓度的碎裂性和纤维性MPs下,菲律宾褐毛菌的死亡率没有变化。大片段MPs诱导的菲律宾褐毛菌呼吸速率在6 h时恢复到对照水平,但纤维状MPs明显低于对照。特别是,纤维状MPs分别显著增加和降低滤过率和溶酶体膜稳定性,而碎片状MPs无显著差异。这些结果增强了我们对海洋环境中不同形状和大小的MPs对底栖生物潜在毒理学风险的认识。
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来源期刊
Ecotoxicology
Ecotoxicology 环境科学-毒理学
CiteScore
5.30
自引率
3.70%
发文量
107
审稿时长
4.7 months
期刊介绍: Ecotoxicology is an international journal devoted to the publication of fundamental research on the effects of toxic chemicals on populations, communities and terrestrial, freshwater and marine ecosystems. It aims to elucidate mechanisms and processes whereby chemicals exert their effects on ecosystems and the impact caused at the population or community level. The journal is not biased with respect to taxon or biome, and papers that indicate possible new approaches to regulation and control of toxic chemicals and those aiding in formulating ways of conserving threatened species are particularly welcome. Studies on individuals should demonstrate linkage to population effects in clear and quantitative ways. Laboratory studies must show a clear linkage to specific field situations. The journal includes not only original research papers but technical notes and review articles, both invited and submitted. A strong, broadly based editorial board ensures as wide an international coverage as possible.
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