Ingestion of microplastics by marine organisms has been well documented, but their interaction with chemical pollutants has not been sufficiently addressed. The aim of this study was to determine the individual and combined effects of chlorpyrifos (CPF) and polyethylene microplastics (MP) on the survival, fecundity, feeding and egg viability of Acartia tonsa, a calanoid copepod widely distributed in planktonic communities. The median lethal concentration obtained for CPF was higher (LC₅₀ = 1.34 μg/L) than for the combination with MP (LC₅₀ = 0.37 μg/L), or CPF-loaded MP (LC₅₀ = 0.26 μg/L). Significant effects were also observed for feeding and egg production (EC₅₀ = 0.77 and 1.07 μg/L for CPF, 0.03 and 0.05 μg/L for CPF combined with MP, 0.18 and 0.20 μg/L for CPF-loaded MP). No significant effects were observed in the exposure to ‘virgin’ MP. This study confirms the role of MP as vectors of pollutants to marine organisms and supports the increased availability of certain toxicants carried out by MP. The effects observed in fitness-related responses suggest potential damage to A. tonsa populations. The comparison of the results obtained here with environmental concentrations indicates that the combined exposure to CPF and MP could constitute a risk to A. tonsa in the natural environment.

海洋生物对微塑料的摄入已有大量文献记载，但它们与化学污染物的相互作用尚未得到充分解决。这项研究的目的是确定毒死rif（CPF）和聚乙烯微塑料（MP）对Acartiatona（一种广泛分布于浮游生物群落中的cal足类pe足动物）的存活，繁殖力，摄食和卵生存力的个体和综合作用。CPF的平均致死浓度（LC ₅₀  = 1.34μg/ L）高于MP的组合（LC ₅₀  = 0.37μg/ L）或CPF负载的MP（LC ₅₀  = 0.26μg/ L）。还观察到了喂食和产蛋的显着效果（EC ₅₀ CPF为0.77和1.07μg/ L，与MP组合的CPF为0.03和0.05μg/ L，CPF加载的MP为0.18和0.20μg/ L）。在“原始” MP暴露中未观察到显着影响。这项研究证实了MP作为海洋生物污染物的媒介的作用，并支持MP所增加的某些有毒物质的利用。在与健身有关的反应中观察到的影响表明对扁桃体人群有潜在的损害。将此处获得的结果与环境浓度进行比较表明，CPF和MP的共同暴露可能构成自然环境中的扁桃体风险。