García-Céspedes Jairo, Acuña-González Jenaro, Vargas-Zamora José A
Centro de Investigación en Ciencias del Mar y Limnología, CIMAR, Universidad de Costa Rica, 2060 San José, Costa Rica.
Rev Biol Trop. 2004 Dec;52 Suppl 2:51-60.
Marine sediment samples from four coastal ecosystems in Costa Rica were taken between the years 2000-2002 and their iron, lead, copper and zinc concentrations were determined by the atomic absorption technique with flame or graphite furnace. In the Pacific coast, Culebra Bay (Papagayo Gulf), Gulf of Nicoya, and Golfito Bay (Dulce Gulf), were selected as representative sites, and Moín Bay, at the Caribbean coast. Mean metal concentrations for all ecosystems followed the same pattern: Fe > Zn > Cu > Pb. No temporal pattern was found for any metal. Iron and copper mean concentrations were higher in Golfito Bay (5.8% and 87 microg/g, respectively) and lower in Moín Bay (3.4% and 52 microg/g, respectively). Zinc mean concentration was also higher in Golfito Bay (96 microg/g), but lower in Culebra Bay (66 microg/g). Lead mean concentration was higher in Moín Bay (6.4 microg/g) and lower in Culebra Bay (3.0 microg/g). Lead highest concentrations occurred in the Caribbean and in Golfito Bay, and for the rest of the elements the maximum values were found in Golfito Bay. On the basis of data obtained in this work, Culebra Bay was considered a relatively unpolluted location; Golfito Bay was more contaminated, and Moín Bay and the Gulf of Nicoya showed an intermediate condition.
2000年至2002年间，从哥斯达黎加的四个沿海生态系统采集了海洋沉积物样本，并采用火焰或石墨炉原子吸收技术测定了其中铁、铅、铜和锌的浓度。在太平洋沿岸，选择了库莱布拉湾（帕帕加约湾）、尼科亚湾和戈尔菲托湾（杜尔塞湾）作为代表性地点，在加勒比海岸选择了莫因湾。所有生态系统中金属的平均浓度遵循相同模式：铁>锌>铜>铅。未发现任何金属有时间变化模式。戈尔菲托湾的铁和铜平均浓度较高（分别为5.8%和87微克/克），莫因湾较低（分别为3.4%和52微克/克）。锌的平均浓度在戈尔菲托湾也较高（96微克/克），但在库莱布拉湾较低（66微克/克）。铅的平均浓度在莫因湾较高（6.4微克/克），在库莱布拉湾较低（3.0微克/克）。铅的最高浓度出现在加勒比地区和戈尔菲托湾，其他元素的最大值出现在戈尔菲托湾。根据这项工作获得的数据，库莱布拉湾被认为是一个相对未受污染的地点；戈尔菲托湾污染更严重，莫因湾和尼科亚湾处于中间状态。
