Impact of nano- and micro-sized polystyrene beads on larval survival and growth of the Pacific oyster Crassostrea gigas
This study successionally monitored how nano- and micro-sized polystyrene beads (MNPs) influence larval mortality, growth, and attachment behavior of the Pacific oyster Crassostrea gigas related to MNP diameter and concentration. D-shaped larvae were sequentially exposed to three-diameter MNPs (0.55...
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Veröffentlicht in: | Journal of hazardous materials 2024-05, Vol.469, p.133952, Article 133952 |
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Sprache: | eng |
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Zusammenfassung: | This study successionally monitored how nano- and micro-sized polystyrene beads (MNPs) influence larval mortality, growth, and attachment behavior of the Pacific oyster Crassostrea gigas related to MNP diameter and concentration. D-shaped larvae were sequentially exposed to three-diameter MNPs (0.55, 3.00, 6.00 µm) at five concentrations (0, 0.1, 1.0, 10, 20 μg/mL), and their mortality, growth stages and attachment were observed daily until they die. In addition, MNP intake and accumulation in larvae at each growth stage were determined using fluorescent beads. Deterioration in larval growth and survival was observed under all the exposure conditions, while significant negative effects on the growth parameters were defined with smaller MNPs at lower concentrations. Fluorescent signals were detected in larval digestive tracts at all except D-shaped larval stage, and on the mantle and foot in pediveligers. Therefore, MNP intake adversely affects larval physiological conditions by the synchronal effects of MNP size and concentration. Our findings highlight the implications of MNP characteristics on Pacific oyster larvae, emphasizing the interplay between size, concentration, and physiological responses, crucial for mitigating nanoparticle pollution in marine ecosystems.
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•Continuous exposure of micro- and nano- plastics (MNPs) during larval period had adverse effects.•Harmful MNP condition was varied in relation to its diameter and concentration.•Smaller sizes and lower concentrations of MPs had severe effects on oyster larvae.•The intake and accumulation of MNPs in oyster larvae were confirmed through fluorescent observations. |
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ISSN: | 0304-3894 1873-3336 1873-3336 |
DOI: | 10.1016/j.jhazmat.2024.133952 |