The objective was to establish possible temporal patterns in the microplastics (MPs) abundance in the water and in the intertidal sediment in an urbanized location of the Río de la Plata estuary (Argentina), in relation to environmental factors. The site was sampled monthly for a year (February 2019–January 2020). The presence of MPs was recorded, being more abundant in February in the water (110 MPs m⁻³) and in April in the sediment (613 MPs m⁻²). The types of MPs found were fibers, fragments, pellets, film and foam; while the polymers identified were polyethylene (PE) and polypropylene (PP). Regarding the environmental variables, the predominance of wind from the NE direction was related to a greater accumulation of MPs in the sediment, while wind from the NO direction was associated with a lower abundance of MPs in the water. Also, MPs abundance was negatively related to the larger sizes of sediment particles.

目的是建立与环境因素有关的Ríode la Plata河口（阿根廷）城市化地区水中和潮间带沉积物中微塑性（MPs）丰度的可能时间模式。该站点每月进行采样，为期一年（2019年2月至2020年1月）。记录到MP的存在，其中2月在水中（110 MPs m ^-3）和4月在沉积物中（613 MPs m ^-2）更丰富。）。被发现的国会议员的类型是纤维，碎片，颗粒，薄膜和泡沫。而鉴定出的聚合物是聚乙烯（PE）和聚丙烯（PP）。关于环境变量，来自东北方向的风主要与沉积物中MP的积累有关，而来自NO方向的风与水中MP含量较低有关。而且，MP的丰度与较大尺寸的沉积物颗粒成负相关。