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Toxicity of microplastics and triclosan, alone and in combination, to the fertilisation success of a broadcast spawning bivalve Tegillarca granosa
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This study looked at how microplastics and the antimicrobial chemical triclosan, both common in ocean water, affect the ability of a shellfish species to reproduce through external fertilization. Researchers found that each pollutant on its own reduced fertilization success, and together they caused even greater harm by impairing sperm movement, reducing energy levels, and disrupting cellular processes. The findings suggest that the combined presence of these pollutants in coastal waters may pose a greater reproductive threat to marine invertebrates than either one alone.
Since most marine invertebrates adopted external fertilisation, their fertilisation process is particularly vulnerable to aquatic pollutants. Both antimicrobial ingredients and microplastics (MPs) are ubiquitous in aquatic environments; however, their synergistic effects on the fertilisation of marine invertebrates remain unclear. Therefore, in this study, the fertilisation toxicity of MPs and triclosan (TCS), alone and in combination, was investigated in the broadcast spawning bivalve Tegillarca granosa. Results showed that MPs and TCS significantly suppressed the fertilisation success of T. granosa. As the fertilisation success of broadcast spawning invertebrates depends on successful gamete collisions, gamete fusion, and egg activation, sperm swimming velocity, viability, gamete collision probability, ATP status, and ion-transport enzyme activities were also analysed to further ascertain the underlying toxicity mechanisms. In summary, our findings indicate that the presence of MPs may enhance the fertilisation toxicity of TCS by hampering sperm-egg collision probability, reducing gamete fusion efficiency, and restricting Ca oscillation formation.
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Toxic effects of triclosan in aquatic organisms: A review focusing on single and combined exposure of environmental conditions and pollutants
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This review examines how triclosan, an antibacterial chemical found in many personal care products, harms aquatic organisms both on its own and in combination with other pollutants including microplastics. When triclosan and microplastics are present together in water, they can produce combined toxic effects that are worse than either alone. Since triclosan is widely used and microplastics are everywhere, their interaction in the environment is an important consideration for both ecosystem and human health.
Microplastics hamper the fertilization success of a broadcast spawning bivalve through reducing gamete collision and gamete fusion efficiency
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Polystyrene microplastics reduced the fertilization success of the broadcast spawning bivalve Tegillarca granosa by reducing both the probability of gamete collision and the efficiency of sperm-egg fusion, representing a reproductive toxicity mechanism with implications for wild marine invertebrate populations.
Combined effects of triclosan and nanoplastics on reproduction performance, population dynamics, and transcriptome regulation of rotifer (Brachionus plicatilis)
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Researchers investigated the individual and combined effects of the antimicrobial chemical triclosan and nanoplastics of varying sizes on rotifer reproduction, population dynamics, and gene expression. They found that high-dose triclosan or very small nanoplastics significantly impaired reproductive output and altered biochemical responses. The study suggests that nanoplastics can enhance the toxicity of co-occurring chemical pollutants in marine organisms.
Immunotoxicity and neurotoxicity of bisphenol A and microplastics alone or in combination to a bivalve species, Tegillarca granosa
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Researchers investigated the immunotoxicity and neurotoxicity of bisphenol A and microplastics, both alone and in combination, on the blood clam Tegillarca granosa. The study found that co-exposure to both pollutants produced significant impacts on immune and neural biomarkers, suggesting that the combined presence of microplastics and chemical contaminants may pose greater risks to marine invertebrates.
Microplastic potentiates triclosan toxicity to the marine copepodAcartia tonsa(Dana)
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Researchers tested whether microplastics worsen the toxicity of triclosan — an antimicrobial chemical — on marine copepods, finding that microplastic potentiated triclosan's toxic effects, suggesting that microplastics can increase the harm of co-occurring chemical contaminants.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.