Centro Interdisciplinar de Energia e Ambiente (CIENAM), Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, 40170-290 Salvador, BA, Brazil.
Laboratório de Ecologia Bentônica (LEB), Instituto de Biologia, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, 40170-115 Salvador, BA, Brazil.
Mar Pollut Bull. 2017 Oct 15;123(1-2):291-303. doi: 10.1016/j.marpolbul.2017.08.041. Epub 2017 Aug 25.
References areas are sites that have undergone little or no anthropogenic impact and therefore represent the natural state of an environment. The objective of this study was to test if the Camamu Bay (CB), Bahia, can be used as a reference area for tropical coastal environments. Trace and major elements, polycyclic aromatic hydrocarbons (PAH), and the structure of the benthic macrofauna were determined. To compare the studied sites and identify the possible occurrence of anomalous concentrations, trace elements were normalized by Al and linear regressions were also performed. For all trace elements (except Cu), regressions showed a significant correlation (p<0.05) and few outliers (<3% of cases), showing that the concentrations found represent natural values for this bay. In the case of Cu, the highest concentrations were found near small municipalities, which may be associated with domestic sewage. About 60% of the organic compounds occurred at levels below the limit of quantification (<0.26ngg). The sum of PAHs was low for all stations, ranging from 1.17 to 313ngg. The benthic assemblages also indicated that the CB is a healthy, well-preserved ecosystem that deserves conservation efforts. The integrated use of geochemical and biotic data supported the use of CB as a reference area. Capsule: Organic and inorganic contaminants together with macrobenthic assemblages indicated that Camamu Bay is a pristine, tropical reference area.
参考区是指那些受到的人为影响很小或没有人为影响的区域，因此代表了环境的自然状态。本研究的目的是测试卡马穆湾（CB），巴伊亚州，是否可以作为热带沿海环境的参考区。本研究测定了痕量和主要元素、多环芳烃（PAH）和底栖大型动物群的结构。为了比较研究地点并确定可能存在异常浓度，通过 Al 对痕量元素进行了归一化，并且还进行了线性回归。对于所有痕量元素（Cu 除外），回归均显示出显著相关性（p<0.05）和少数异常值（<3%的情况），表明所发现的浓度代表了该海湾的自然值。对于 Cu，在靠近小市镇的地方发现了最高浓度，这可能与生活污水有关。大约 60%的有机化合物的浓度低于定量限（<0.26ngg）。所有站位的多环芳烃总和都很低，范围从 1.17 到 313ngg。底栖动物群也表明 CB 是一个健康、保存完好的生态系统，值得进行保护工作。地球化学和生物数据的综合使用支持将 CB 用作参考区。简而言之：有机和无机污染物以及底栖大型动物群表明卡马穆湾是一个原始的、热带的参照区。
