Identification of tidal trapping of microplastics in a temperate salt marsh system using sea surface microlayer sampling
Identification of tidal trapping of microplastics in a temperate salt marsh system using sea surface microlayer sampling
复制标题
利用海面微层采样识别温带盐沼系统中潮汐捕获的微塑料
作者：
Jessica L. Stead;A. Cundy;M. Hudson;Charlie Thompson;I. Williams;A. E. Russell;K. Pabortsava
微塑料是日益受到全球环境关注的污染物。河口是陆源塑料进入开阔海洋的主要运输途径，但与沿海和开阔的海洋环境相比，研究相对较少。对于微塑料从陆地向海洋的转移，“河口过滤器”的作用仍然不明确，通过这种过滤器，沉积物和污染物向海洋的供应受到包括植物捕集和颗粒絮凝在内的过程的调节。在这里，我们将重点放在作为微塑料载体的海洋表面微层(SML)上，并使用SML采样来评估英国南安普敦水域温带沼泽系统中的微塑料捕获。众所周知，SML相对于底层水集中了微塑料，是潮水上升穿过潮间带和潮上表面的第一部分。通过对盐沼小溪进行高时间分辨率采样，可以在大潮和小潮期间评估微塑料在盐沼中的流入和流出，及其与潮汐状态和总体悬浮泥沙浓度(SSC)的关系。从涨潮到落潮，微塑料的丰度在统计上有显著的下降，并且与SSC呈微弱的正相关。
Microplastics are contaminants of increasing global environmental concern. Estuaries are a major transport pathway for land-derived plastics to the open ocean but are relatively understudied compared to coastal and open marine environments. The role of the “estuarine filter”, by which the supply of sediments and contaminants to the sea is moderated by processes including vegetative trapping and particle flocculation, remains poorly defined for microplastics land to sea transfer. Here, we focus on the sea surface microlayer (SML) as a vector for microplastics, and use SML sampling to assess microplastic trapping in a temperate marsh system in Southampton Water, UK. The SML is known to concentrate microplastics relative to the underlying water and is the first part of rising tidal waters to traverse intertidal and upper tidal surfaces. Sampling a salt marsh creek at high temporal resolution allowed assessment of microplastics in-wash and outflow from the salt marsh, and its relationship with tidal state and bulk suspended sediment concentrations (SSC), over spring and neap tides. A statistically significant decrease in microplastics abundance from the flood tide to the ebb tide was found, and a weak positive relationship with SSC observed.
影响因子：
4.6
作者：
Nelms, S. E.;Barnett, J.;Godley, B. J.
通讯作者：
Godley, B. J.