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