Bight 03 Debris Harmonized

The Southern California Bight (SCB) is an open embayment along the coast between Point Conception and Cape Colnett (south of Ensenada), Baja California, and is an important and unique ecological resource. The SCB is a transitional area influenced by currents from cold, temperate ocean waters from the north and warm, tropical waters from the south. It has complex topography with offshore islands, submarine canyons, ridges, and basins that provide a variety of habitats supporting more than 500 species of fish and several thousand species of invertebrates. The SCB is also a major migration route for marine birds and mammals and a substantial economic resource, with Los Angeles/Long Beach Harbor being the largest commercial port in the United States. The 2003 Southern California Bight Regional Monitoring Project (Bight'03) is a continuation of cooperative regional-scale monitoring efforts begun in the 1990s, building upon the Southern California Bight Pilot Project (1994) and Bight'98. This dataset contains trawl debris data collected between July 17, 2003 and October 13, 2003 as part of the coastal ecology component of Bight'03. Debris captured in trawls was classified by type (e.g., plant material, plastic, cans, fishing gear, metal debris, tires, glass bottles, lumber, medical waste, etc.) and scored according to relative abundance and estimated weight. The amount of plastic, metal, and other anthropogenic debris on the bottom serves as a measure of human influence on the benthic environment. Multiple organizations participated in data collection across the SCB study area, spanning depths of 10 to 200 meters, with some coverage of offshore and inshore habitats including coastal lagoons, the upper continental slope, and inner basins.南加州湾（Southern California Bight，简称SCB）是位于康塞普西翁角与下加利福尼亚州恩塞纳达以南的科尔内特角之间的开放式近海海湾，是一类重要且独特的生态资源。该区域属于过渡性海域，受北部寒冷温带洋流与南部温暖热带洋流的共同影响。区域内地形复杂，分布有离岸岛屿、海底峡谷、海脊与海盆，为超过500种鱼类与数千种无脊椎动物提供了多样的栖息环境。南加州湾同时也是海洋鸟类与哺乳动物的重要洄游通道，且具备可观的经济价值——洛杉矶/长滩港为美国规模最大的商业港口。2003年南加州湾区域监测项目（Bight'03）是对20世纪90年代启动的合作式区域尺度监测工作的延续，其工作基于1994年南加州湾试点项目与Bight'98项目开展。本数据集包含2003年7月17日至10月13日期间采集的拖网垃圾数据，属于Bight'03海岸生态学研究组分的一部分。拖网捕获的垃圾按类型进行分类（例如植物碎屑、塑料、金属罐、渔具、金属废弃物、轮胎、玻璃瓶、木材、医疗废弃物等），并依据相对丰度与估算重量进行评分赋值。海底塑料、金属及其他人为源垃圾的存量，可作为衡量人类活动对底栖环境影响程度的指标。多家机构参与了南加州湾研究区域内的数据采集工作，采样覆盖水深10至200米的范围，同时涵盖了离岸与近岸生境，包括沿海泻湖、大陆坡上段与内海盆。