The presence of beach litter along the coast is due to the indirect input by waves, wind, rivers and currents and to the direct deposition by beach users. This study, conducted in Sardinia (Western Mediterranean Sea), aims to quantify and characterize beach litter all around the island and to suggest the main sources of impact. Five monitoring campaigns (autumn 2013; spring 2014; autumn 2015; spring 2016; autumn 2016) were conducted considering 3 “exposed” and 4 “sheltered” beaches by means of 33.3-m linear transects in which all “macroscopic” items (> 5 mm) were collected. “Micro” litter (< 5 mm) sampling was performed in 6 beaches through 10-m linear transects. For both sampling designs, abundance and litter typologies were assessed following the protocols of the Marine Strategy Framework Directive (MSFD) and BASEMAN project. Repeated measures permutational analysis of variance was performed to detect any difference in abundance and composition of marine litter according to season, wind exposure and site. Exposure was the factor that better explains the distribution of litter: higher values were found on the “exposed” (E) sites with respect to the “sheltered” (S) ones, both for macroscopic (E: 1696.56 ± 219.25 items/100 m; S: 420.5 ± 74.73 items/100 m) and micro litter (E: 7990.67 ± 2319.44 items/10 m; S: 111.78 ± 25.91 items/10 m). All the 8 typologies were recorded, and litter composition significantly varied according to exposure and site over time. This work provides key information about litter presence and sources, useful to suggest possible mitigation measures.

沿海地区沙滩垃圾的存在是由于海浪，风，河流和洋流的间接输入以及沙滩使用者的直接沉积。这项研究是在撒丁岛（西地中海）进行的，旨在量化和表征整个岛屿的沙滩垃圾，并提出影响的主要来源。进行了五次监测活动（2013年秋季； 2014年春季； 2015年秋季； 2016年春季； 2016年秋季），通过33.3米长的线性样带，其中所有“宏观”项目（> 5），考虑了3个“裸露”海滩和4个“庇护”海滩。毫米）。通过10米长的线性样条线在6个海滩上进行“微型”垫料（<5毫米）采样。对于这两种抽样设计，都按照海洋战略框架指令（MSFD）和BASEMAN项目的协议评估了丰度和垫料类型。进行了重复测量的方差变异分析，以根据季节，风向和地点来检测海洋垃圾的丰度和组成的任何差异。暴露是更好地解释垃圾分布的因素：在“暴露”（E）站点上，相对于“避难”（S）站点，发现更高的值。宏观（E：1696.56±219.25项/ 100 m; S：420.5±74.73项/ 100 m）和微型垫料（E：7990.67±2319.44项/ 10 m; S：111.78±25.91项/ 10 m）。记录了全部8种类型，随时间的推移，垫料的组成会根据暴露和部位的不同而有很大差异。这项工作提供了有关垫料存在和来源的关键信息，有助于建议可能的缓解措施。