Seafloor litter at oceanic islands and seamounts of the southeastern Pacific

Seafloor litter in oceanic islands of the southeastern Pacific Ocean have rarely been described and quantified, mainly due to the associated logistical challenges. In this study, we describe and quantify the different kinds of litter from 60 to 320 m depths in Rapa Nui (RN) and Desventuradas Islands (DI), and evaluated the relationship of this litter with the local population in terms of demographic density and fishing activity. The study compiled data from 84 stations surveyed with a ROV representing a total distance of 22 km. Litter was grouped into six categories. 96 observations of litter and debris were taken around RN, most of which associated with local artisanal fishing activity, especially fishing anchors (56%). No tourism-associated debris were reported. Any kind of seafloor litter was observed at DI. The present study provides baseline information for the local community to improve management by understanding the potential sources of seafloor litter.