Universidade de São Paulo, Instituto Oceanográfico, Praça do Oceanográfico 191, São Paulo, SP 05508-120, Brazil.
Universidade de São Paulo, Instituto Oceanográfico, Praça do Oceanográfico 191, São Paulo, SP 05508-120, Brazil.
Mar Pollut Bull. 2021 Jun;167:112370. doi: 10.1016/j.marpolbul.2021.112370. Epub 2021 Apr 22.
Anthropogenic activities have impacted the coastal region of Brazil. In the Paranaguá estuarine complex (PEC), Cananéia-Iguape estuarine-lagoon complex (CIELC), and Santos-São Vicente estuarine complex (SSVEC), such activities occur across differing scales. In these estuaries, the concentrations of mercury (Hg) and stable nitrogen isotopes (δN) were investigated in sediments and marine organisms including benthic macrofauna, fish and cetaceans. Hg bioconcentration occurred primarily in cetaceans, polychaetes and molluscs, and reflects the impact of anthropogenic activities in the regions studied (PEC and SSVEC > CIELC). Bioaccumulation occurred in most of the studied specimens, but biodilution of Hg was observed in the trophic webs of SSVEC and CIELC. Despite measuring lower Hg levels than in studies carried out in the northern hemisphere, the results highlight potential concerns for public and environmental health in these highly productive coastal regions in the southwestern Atlantic which are important for fishing and various economic activities.
人为活动已经对巴西沿海地区产生了影响。在帕拉纳瓜河口复合区（PEC）、卡纳埃亚-伊瓜佩河口-泻湖复合区（CIELC）和桑托斯-圣文森特河口复合区（SSVEC），这些活动发生在不同的规模上。在这些河口，对沉积物和海洋生物（包括底栖大型动物、鱼类和鲸目动物）中的汞（Hg）和稳定氮同位素（δN）浓度进行了调查。Hg 的生物浓缩主要发生在鲸目动物、多毛类和软体动物中，反映了研究区域（PEC 和 SSVEC>CIELC）人为活动的影响。大多数研究样本中都发生了生物积累，但在 SSVEC 和 CIELC 的营养级网络中观察到 Hg 的生物稀释。尽管 Hg 水平低于在北半球进行的研究，但这些结果强调了西南大西洋这些高度生产力沿海地区对公共和环境健康的潜在关注，这些地区对渔业和各种经济活动都很重要。
