Scholarlink

Background <p>Microplastic (MP) pollution has emerged as a pressing environmental concern over the past few decades. Among filter-feeding bivalves, oysters stand out as efficient accumulators of MPs, rendering them valuable bioindicators of environmental contamination.</p> Objectives <p>This study aimed to elucidate the particulate toxicity of MPs&#xa0;on the Pacific oyster <i>Crassostrea</i> <i>gigas</i>, with a focus on the effects of MP size and concentration. Adverse effects were evaluated using several physiological parameters, including survival, growth and respiration. Additionally, histological observations of the digestive and respiratory organs were conducted to investigate the underlying mechanisms of MP-induced toxicity.</p> Results <p>The findings revealed that MP exposure had a detrimental impact on oyster survival, with a&#xa0;decreased pattern of survival rates observed in those subjected to higher MP concentrations, regardless of particle size. Moreover, the oysters exposed to larger MP particles exhibited heightened oxygen consumption, indicating a&#xa0;significant physiological response. Histological analyses identified damage to the gastrointestinal tracts and gills in several individuals from the experimental group.</p> Conclusion <p>These observations collectively suggest that MPs exert adverse effects on the survival and growth of Pacific oysters. Furthermore, the severity of MP effects appears to be concentration-dependent, with higher concentrations eliciting more pronounced impacts. The observed alterations in survival and growth are attributed to the tissue damage caused by MPs, which likely compelled oysters to allocate additional energy toward maintaining physiological and cellular homeostasis, as reflected by increased oxygen consumption.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Physiological impacts of microplastics on the Pacific oyster Crassostrea gigas: The role of particle size and concentration

  • 期刊论文

  • 发表日期：

    2025年10月22日

查看全文
  • Taekyoung Seong,
  • Mei Makino,
  • Mitsuharu Yagi,
  • Hisayuki Nakatani,
  • Yusaku Kyozuka,
  • Jae-Sung Rhee,
  • Glenn Satuito,
  • Hee-Jin Kim

摘要

Background

Microplastic (MP) pollution has emerged as a pressing environmental concern over the past few decades. Among filter-feeding bivalves, oysters stand out as efficient accumulators of MPs, rendering them valuable bioindicators of environmental contamination.

Objectives

This study aimed to elucidate the particulate toxicity of MPs on the Pacific oyster Crassostrea gigas, with a focus on the effects of MP size and concentration. Adverse effects were evaluated using several physiological parameters, including survival, growth and respiration. Additionally, histological observations of the digestive and respiratory organs were conducted to investigate the underlying mechanisms of MP-induced toxicity.

Results

The findings revealed that MP exposure had a detrimental impact on oyster survival, with a decreased pattern of survival rates observed in those subjected to higher MP concentrations, regardless of particle size. Moreover, the oysters exposed to larger MP particles exhibited heightened oxygen consumption, indicating a significant physiological response. Histological analyses identified damage to the gastrointestinal tracts and gills in several individuals from the experimental group.

Conclusion

These observations collectively suggest that MPs exert adverse effects on the survival and growth of Pacific oysters. Furthermore, the severity of MP effects appears to be concentration-dependent, with higher concentrations eliciting more pronounced impacts. The observed alterations in survival and growth are attributed to the tissue damage caused by MPs, which likely compelled oysters to allocate additional energy toward maintaining physiological and cellular homeostasis, as reflected by increased oxygen consumption.