Abstract：
Anthropogenic Marine Litter (AML) accumulating on beaches causes damage to coastal ecosystems and high costs to local communities. Volunteers sampled AML on 130 beaches along the central and southern East Pacific coasts, with AML densities ranging from 0.46 to 2.26 items m-2 in the different countries. AML composition was dominated by plastics and cigarette butts, the latter especially in Mexico and Chile. The accumulation of AML in the upper zones of the beaches and substantial proportions of cigarette butts, glass and metal pointed mainly to local sources. Statistical modelling of litter sources on continental beaches revealed that tourism, access and related infrastructure (e.g. parking lots) best explained AML densities, while plastic densities were also influenced by the distance from river mouths and national Gross Domestic Product. Large-scale monitoring can be a useful tool to evaluate the effectiveness of public policies that should primarily focus on land sources.
摘要：
在海滩上积累的人为海洋垃圾（AML）对沿海生态系统造成了破坏，并给当地社区带来了高昂的成本。志愿者在东太平洋中部和南部海岸的130个海滩上采样了AML，不同国家的AML密度为0.46至2.26项m-2。AML的成分主要是塑料和烟头，尤其是在墨西哥和智利。AML在海滩上部区域的积累和相当大比例的烟头，玻璃和金属主要指向当地来源。大陆海滩垃圾来源的统计模型显示，旅游业，访问和相关的基础设施（例如停车场）最好的解释AML密度，而塑料密度也受到与河口距离和国民生产总值的影响。大规模监测可以成为评估公共政策有效性的有用工具，公共政策应主要侧重于土地来源。
