Thünen Institute of Fisheries Ecology, Herwigstraße 31, 27572 Bremerhaven, Germany.
Thünen Institute of Fisheries Ecology, Herwigstraße 31, 27572 Bremerhaven, Germany.
Mar Pollut Bull. 2023 Sep;194(Pt A):115348. doi: 10.1016/j.marpolbul.2023.115348. Epub 2023 Aug 4.
As an important part of marine litter at the seafloor "Abandoned, lost, discarded or otherwise lost fishing gear" (ALDFG) is gaining increasing attention in environmental assessments. Within this study marine litter at the seafloor of the Baltic Sea was quantified and characterized with special regard to fishery as source. Litter items (LI) were collected within fishery catches by bottom trawling during three cruises in 2020 and 2021. The resulting mean litter abundance was 9.2 LI/km. Approximately 56 % of all LI were plastic, with PE as the most frequently identified polymer. ALDFG was present in considerable amounts with a mean value of 2.2 LI/km (22.2 %). However, the absolute counts of fishery nets were low (0.4 LI/km; 4.2 %). Regarding weight, fishery nets are the dominant part of litter at the Baltic seafloor. Threshold values for marine litter at the seafloor are missing and might be developed using quantitative data on ALDFG.
作为海底海洋垃圾的重要组成部分，“废弃、丢失、丢弃或其他丢失的渔具”（ALDFG）在环境评估中受到越来越多的关注。在本研究中，对波罗的海海底的海洋垃圾进行了量化和特征描述，特别关注了渔业作为来源。在 2020 年和 2021 年的三次航行中，通过底拖网捕捞渔业渔获物收集垃圾。结果表明，垃圾的平均丰度为 9.2 个/LI/km。大约 56%的垃圾是塑料，PE 是最常见的聚合物。ALDFG 的含量相当高，平均值为 2.2 个/LI/km（22.2%）。然而，渔业网的绝对数量很低（0.4 个/LI/km；4.2%）。就重量而言，渔业网是波罗的海底垃圾的主要组成部分。海底海洋垃圾的阈值尚不清楚，可能会使用有关 ALDFG 的定量数据来开发。
