Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO), CSIC, Subida a Radio Faro, 50, Vigo, 36390, Spain.
Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO), CSIC, Subida a Radio Faro, 50, Vigo, 36390, Spain.
Environ Pollut. 2024 Apr 1;346:123654. doi: 10.1016/j.envpol.2024.123654. Epub 2024 Feb 24.
The seafloor is recognised as a major sink for marine litter. However, studies conducted in this compartment addressing marine litter densities and its interactions with fauna are scarce, mainly due to sampling constraints. In this paper, we assess marine litter density, composition and interactions with marine communities and evaluate its relationship with fishing activities at the "Banco de la Concepción" seamount (Canary Islands, Spain). We took advantage of underwater video records taken with a Remotely Operated Towed Vehicle in the framework of the LIFE IP INTEMARES project. A total of 56 video transects were analysed covering about 9 km with 19 h of video recording. Transects were categorised as high, low, and null fishing effort based on the Vessel Monitoring System (VMS) positional data registered between 2009 and 2017. Litter items were recorded in 70% of the transects with a mean density of 2122 (±2464) items km. There were significant differences in litter densities over the three levels of fishing pressure, with a density decrease from stations of high to stations of null fishing pressure. Regarding categories, plastic was by far the most abundant category found (83.1%), mainly consisting of fishing lines, both monofilaments and entangled longlines. The study of the interactions of marine litter with fauna showed that less than 20% of the items presented an interaction with benthic organisms either by causing or not a visible impact. The sponge Asconema setubalense accounted for more than half (57.4%) of all interactions, but only 5% of all A. setubalense specimens showed physical damage.
海底被认为是海洋垃圾的主要汇。然而，由于采样限制，在这个环境中进行的研究很少涉及海洋垃圾的密度及其与动物区系的相互作用。在本文中，我们评估了“Banco de la Concepción”海山（加那利群岛，西班牙）的海洋垃圾密度、组成及其与海洋群落的相互作用，并评估了其与渔业活动的关系。我们利用 LIFE IP INTEMARES 项目中使用遥控拖曳车拍摄的水下视频记录。总共分析了 56 个视频横断面，覆盖了约 9 公里，视频记录了 19 小时。根据 2009 年至 2017 年期间登记的船舶监测系统（VMS）位置数据，将横断面分为高、低和零捕鱼努力。在 70%的横断面中记录到垃圾，平均密度为 2122（±2464）个/km。在三种捕鱼压力水平上，垃圾密度存在显著差异，从高捕鱼压力站到零捕鱼压力站，密度逐渐降低。关于类别，塑料是迄今为止发现的最丰富的类别（83.1%），主要由渔线组成，包括单丝和缠绕的延绳钓渔线。海洋垃圾与动物区系相互作用的研究表明，不到 20%的物品与底栖生物相互作用，无论是造成还是不造成可见影响。海绵 Asconema setubalense 占所有相互作用的一半以上（57.4%），但只有 5%的 A. setubalense 标本显示出物理损伤。
