Instituto Español de Oceanografía, Centro Oceanográfico de Vigo, Subida a Radio Faro 50, 36390 Vigo, Spain.
Geochemical and Environmental Research Group, Texas A&M University, 833 Graham Rd., College Station, TX 77845, USA.
Environ Int. 2014 Oct;71:1-12. doi: 10.1016/j.envint.2014.05.024. Epub 2014 Jun 17.
Since 1991, the Instituto Español de Oceanografía has monitored the concentrations of trace metals in wild mussels from the north (Cantabrian Sea) and northwest (Atlantic) coasts of Spain to define geographical distributions and temporal trends. While Cu, Zn and As concentrations presented fairly uniform geographical distributions, Hg and Pb concentrations were higher in mussels from the Cantabrian sea region as a result of historical anthropogenic activities. Cd, on the other hand, appeared to be more affected by natural processes on the northwest Atlantic coast (i.e., upwelling) than by human activity. Approximately 70% of the paired observations showed downward trends, 50% of these significant, with time. An improvement in environmental conditions along the northern coasts of Spain is evident despite that some metal levels resulted above the Background Assessment Concentrations given by OSPAR to assess potentially harmful occurrences.
自 1991 年以来，西班牙海洋学研究所一直监测西班牙北部（坎塔布连海）和西北部（大西洋）沿海野生贻贝中痕量金属的浓度，以确定地理分布和时间趋势。虽然 Cu、Zn 和 As 的浓度呈现出相当均匀的地理分布，但由于历史上的人为活动，坎塔布连海地区贻贝中的 Hg 和 Pb 浓度更高。另一方面，Cd 似乎更多地受到西北大西洋海岸自然过程（即上升流）的影响，而不是人类活动的影响。大约 70%的成对观测结果显示出下降趋势，其中 50%具有统计学意义，随着时间的推移。尽管一些金属水平高于 OS-PAR 评估潜在有害事件的背景评估浓度，但西班牙北部沿海地区的环境条件明显改善。
