The effect of coral colony morphology, coral surface condition, particle size, and seeding point on the trapping and deposition of microplastics

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 921, P. 171077 - 171077

Published: Feb. 19, 2024

Coral reefs are increasingly identified as microplastic sinks. Understanding the trapping and deposition effects on microplastics among coral colonies of different morphologies can help identify which corals at higher risk exposure. Here, we used a current-generating saltwater flume to explore branching coral, Pocillopora acuta, with contrasting (open compact), together varying surface conditions (live, dead, waxed), sizes (400 500 μm 900 1000 μm), seeding points (above-colony mid-colony). Results revealed that more were trapped by, deposited nearer to, compact compared those open morphology—likely due differences in flow dynamics. More larger trapped, introduced mid point, but condition had no significant effect. These findings add growing evidence effective facilitating microplastics. Branching structures potentially high pollution impact. We posit composition, i.e. relative abundance colonies, will affect accumulation natural reef environments. This study demonstrates morphology deposition, providing mechanistic insights into factors contribute acting

Language: Английский

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Size-dependent vector effects of microplastics on bioaccumulation of hydrophobic organic contaminants in earthworm: A dual-dosing study

Environment International, Journal Year: 2024, Volume and Issue: 186, P. 108625 - 108625

Published: April 1, 2024

The potential of microplastics to act as a vector for anthropogenic contaminants is rising concern. However, directly quantitatively determining the effects has been rarely studied. Here, we present dual-dosing method that simulates chemical bioaccumulation from soil and simultaneously, wherein unlabeled hydrophobic organic (HOCs) were spiked in their respective isotope-labeled reference compounds on polyethylene microplastics. comparison bioavailability, i.e., freely dissolved concentration porewater by earthworm, between HOCs was carried out. Relatively higher level bioavailability observed compared HOCs, which may be attributed irreversible desorption particles. average relative fractions bioaccumulated treated with 1 % ranged 6.9 46.4 %, than those 0.1 Treatments smallest microplastic particles have highest exception phenanthrene, suggesting greater smaller Biodynamic model analysis indicated contribution dermal uptake HOCs. This proposed can used tool assess prospective complex environmental conditions would enhance comprehensive understanding HOC bioaccumulation.

Language: Английский

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Size dependent uptake and trophic transfer of polystyrene microplastics in unicellular freshwater eukaryotes

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 929, P. 172470 - 172470

Published: April 14, 2024

Microplastics (MP) have become a well-known and widely investigated environmental pollutant. Despite the huge amount of new studies investigating potential threat posed by MP, possible uptake trophic transfer in lower levels freshwater ecosystems remains understudied. This study aims to investigate internalization fluorescent polystyrene (PS) beads (0.5 μm, 3.6 × 108 particles/mL; 6 2.1 105 particles/mL) fragments (<30 5 103 three unicellular eukaryotes. focuses on size-dependent MP two Ciliophora, Tetrahymena pyriformis, Paramecium caudatum one Amoebozoa, Amoeba proteus, serving also as predator for experiments transfer. Size-dependent all eukaryotes was shown. P. is able take up 27.7 while T. pyriformis ingests particles 10 μm. In A. proteus small (PS0.5μm PS6μm) were taken via pinocytosis detected cytoplasm 14 days after exposure. Large PS-MP (PS<30μm) only predation MP-fed Ciliophora. These results indicate that larger Ciliophora (PS<30μm), which would not be otherwise. shows at base aquatic food web serves basis impact ecosystems.

Language: Английский

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Impact of polystyrene nanoplastics on apoptosis and inflammation in zebrafish larvae: Insights from reactive oxygen species perspective

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 948, P. 174737 - 174737

Published: July 14, 2024

Language: Английский

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Assessing male reproductive toxicity of environmental pollutant di-ethylhexyl phthalate with network toxicology and molecular docking strategy

Reproductive Toxicology, Journal Year: 2024, Volume and Issue: 130, P. 108749 - 108749

Published: Nov. 17, 2024

Language: Английский

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