The goal of this study was to analyse the presence, abundance, types, size and colours of microplastics (MPs) in the soft tissue of the golden mussel Limnoperna fortunei in the freshwater-mixohaline tidal zone of Río de la Plata estuary. 240 mussels were analysed and the MPs were observed in the 96% of samples, being more abundant in the mussels that settled down close to the main sewage discharges, and in the maximum turbidity front. The average number of MPs/g and MPs/ind was 2.08 and 0.43, respectively. The 90% of MPs, were fibres and the most frequent sizes were >500 $\le$ $1000\mathrm{\mu }\mathrm{m}$. The high density of L. fortunei on the coast of the Río de la Plata, its potential predators, and the presence of MPs in the soft tissue, warn the important role this mussel plays in the transfer of this pollutant through the trophic web of the estuary.

这项研究的目的是分析里约拉普拉塔河口淡水-混合卤化潮汐带中的金贻贝Limnoperna fortunei软组织中微塑料（MPs）的存在，丰度，类型，大小和颜色。分析了240个贻贝，并在96％的样品中观察到了MP，在靠近主要污水排放口和最大浊度前沿沉降的贻贝中含量更高。MPs / g和MPs / ind的平均数分别为2.08和0.43。MP的90％是纤维，最常见的尺寸是> 500$\le$ $1000\mathrm{\mu }\mathrm{米}$。高密度L.柳杉在拉普拉塔河，其潜在的掠食者的海岸，以及国会议员的软组织的存在，通过对螺旋藻的营养网提醒在该污染物的转移这贻贝发挥的重要作用河口。