UBIPRO, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México Av. de los Barrios 1, Los Reyes Iztacala, Tlalnepantla, México 54090, Mexico.
Mar Pollut Bull. 2013 Mar 15;68(1-2):127-33. doi: 10.1016/j.marpolbul.2012.12.008. Epub 2013 Jan 12.
This study focused on the spatial distribution of trace metals in the Veracruz Reef System in the Southern Gulf of Mexico, and its variability in the early (July) and late (September) rainy season of 2008, by analyzing the concentration of Cd, Cu and Pb in benthic macroalgae. Mean concentrations are lower (Pb 295 ± 347 ng g(-1), Cd 17.9 ± 15.0 ng g(-1)), or similar (Cu 3.4 ± 4.5 μg g(-1)) to those reported from other coastal areas. Cd and Pb concentrations are influenced by the discharge of the Jamapa River, evidencing a fluvial control on coastal trace metal levels. Also, Cd and Cu concentrations were lower in the late rainy season, when there is a high load of suspended sediments derived from fluvial discharge, which probably adsorb dissolved metals decreasing their bioavailability. Pb concentrations have been decreasing in the last two decades in the SGM, after the banning of leaded-gasoline in the late 20th century.
本研究重点分析了墨西哥湾南部韦拉克鲁斯礁系统中痕量金属的空间分布及其在 2008 年雨季早期（7 月）和晚期（9 月）的变化情况，所用方法为测定底栖大型藻类中 Cd、Cu 和 Pb 的浓度。结果表明，底栖大型藻类中的 Pb、Cd 和 Cu 的平均浓度较低（Pb 为 295±347ng g(-1)，Cd 为 17.9±15.0ng g(-1)，Cu 为 3.4±4.5μg g(-1)），与其他沿海地区的报道结果相似。此外，杰马帕河的径流量对 Cd 和 Pb 的浓度有影响，这表明河流对沿海痕量金属水平有一定的控制作用。另外，在雨季晚期，当有大量来自河流排放的悬浮泥沙时，Cd 和 Cu 的浓度较低，这可能是由于悬浮泥沙吸附了溶解态金属，降低了其生物可利用性。20 世纪末含铅汽油被禁止使用后，过去 20 年来，墨西哥湾南部的 Pb 浓度一直在下降。
