期刊
MARINE POLLUTION BULLETIN
卷 152, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2020.110919
关键词
Microplastic; Microalgae concentration; Marine copepod; Ingestion; Residence time
资金
- Fundamental Research Funds for the Central Universities [201964025]
- Central Public-interest Scientific Institution Basal Research Fund, CAFS
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, P. R. China [2019HY-XKQ01]
Microplastics have aroused great concern for their potential threats to marine organisms. This study investigated the interaction between three sizes of microplastics (0.5, 2, and 10 mu m) and the marine copepod Pseudodiaptomus annandalei under two different microalgae concentrations (1 x 10(3) and 1 x 10(5) cells/mL). The results revealed that low microalgae supply increased microplastic ingestion through enhancing the encounter rates, and moreover increased the retention time of 0.5 mu m microplastics. When the microalgae concentration was 1 x 10(3) cells/mL, 0.5 mu m microplastics could be observed in the copepods after depuration in clear seawater for 24 h, but almost totally excreted at 1 x 10(5) cells/mL of microalgae. In addition, 0.5 mu m microplastics induced significant effects on the ingestion of microalgae by P. annandalei both after 24 h of exposure and depuration. These results suggest that low microalgae availability may increase the ingestion and retention of microplastics in marine copepods, which might increase the ecological risk of microplastics.
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