Integrative Oceanography Division, Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0206, United States of America.
Integrative Oceanography Division, Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0206, United States of America.
Mar Pollut Bull. 2024 Jun;203:116463. doi: 10.1016/j.marpolbul.2024.116463. Epub 2024 May 21.
Industrial waste barrels were discarded from 1947 to 1961 at a DDT dumpsite in the San Pedro Basin (SPB) in southern California, USA at ~890 m. The barrels were studied for effects on sediment concentrations of DDX, PCBs, PAHs and sediment properties, and on benthic macrofaunal assemblages, including metazoan meiofaunal taxa >0.3 mm. DDX concentration was highest in the 2-6 cm fraction of the 10-cm deep cores studied but exhibited no correlation with macrofaunal density, composition or diversity. Macrofaunal diversity was lowest and distinct in sediments within discolored halos surrounding the barrels. Low macrobenthos density and diversity, high dominance by Entoprocta, and numerical prevalence of large nematodes may result from the very low oxygen concentrations in bottom waters (< 4.4 μM). There is potential for macrofauna to remobilize DDX into the water column and ultimately the food web in the SPB.
1947 年至 1961 年期间，在美国加利福尼亚州南部圣佩德罗盆地（SPB）的一个滴滴涕倾倒场丢弃了工业废桶，这些桶位于约 890 米深处。研究了这些桶对沉积物中滴滴涕、多氯联苯、多环芳烃浓度和沉积物性质的影响，以及对底栖大型动物群的影响，包括后生动物的小型后生动物类群（>0.3 毫米）。DDX 浓度在研究的 10 厘米深核心的 2-6 厘米部分最高，但与大型动物密度、组成或多样性无关。在桶周围变色晕环内的沉积物中，大型动物的多样性最低且明显不同。底栖动物密度和多样性低，内肛动物占主导地位，大型线虫数量多，可能是由于底层水中的氧气浓度非常低（<4.4 μM）。大型动物有可能将滴滴涕重新迁移到水柱中，并最终迁移到 SPB 的食物网中。
