ABSTRACT

Coastal lagoons are highly sensitive ecosystems from the ecological point of view. Water samples to assess physicochemical parameters, as well as sediments to measure trace metals (Cd, Cr, Cu, Ni, Pb, Zn and Hg) were collected in seven coastal lagoons of the Sabana-Camagüey Archipelago. Los Caimanes, Tortuguilla and La Salina lagoons showed high salinity levels (>100.0 PSU). High concentrations of Total Nitrogen (TN, up to 819.3 mmol/L) and Total Phosphorus (TP, up to 7.8 mmol/L) were recorded in the lagoons with more impact from tourism development, such as Las Coloradas, Larga, Los Caimanes and La Salina lagoons. Regarding their relative abundance, metals ranked as follows: Ni > Zn > Cu > Cd > Hg > Cr >Pb. Metal concentrations ranged within the following intervals: Pb: < 50 mg/kg (all values below the quantification limit); Ni: <12.5–115.7 mg/kg; Cd: <2.0–3.4 mg/kg; Zn: 5.2–81.4 mg/kg; Cu: <5.0–45.2 mg/kg; Cr: <25.0–156.4 mg/kg and Hg: <0.1–0.30 mg/kg. The concentrations of trace metals were similar to those recorded in uncontaminated coastal systems of Cuba and other parts of the world. Nevertheless, most trace metals, except Hg, showed high concentrations at Site 1 of Laguna Las Coloradas. Laguna Tortuguilla was the lagoon with the highest ecological risk. Cd must be carefully monitored there, as concentrations detected were high (up to 3.4 mg/kg), which poses an ecological risk for all the lagoons.

摘要

从生态学的角度来看，沿海泻湖是高度敏感的生态系统。在Sabana-Camagüey群岛的七个沿海泻湖中收集了用于评估理化参数的水样以及用于测量痕量金属（Cd，Cr，Cu，Ni，Pb，Zn和Hg）的沉积物。Los Caimanes，Tortuguilla和La Salina泻湖显示出高盐度水平（> 100.0 PSU）。在泻湖中记录到高浓度的总氮（TN，高达819.3 mmol / L）和总磷（TP，高达7.8 mmol / L），对旅游业发展的影响更大，如Las Coloradas，Larga，Los Caimanes和拉萨利纳泻湖。关于它们的相对丰度，金属排名如下：Ni> Zn> Cu> Cd> Hg> Cr> Pb。金属浓度在以下范围内变化：Pb：< 50 mg / kg（所有数值均低于定量限）；Ni：<12.5-115.7 mg / kg；镉：<2.0–3.4 mg / kg；锌：5.2–81.4 mg / kg；铜：<5.0-45.2 mg / kg；铬：<25.0–156.4 mg / kg，汞：<0.1–0.30 mg / kg。痕量金属的浓度与古巴和世界其他地区未受污染的沿海系统记录的浓度相似。但是，除汞以外，大多数痕量金属在Laguna Las Coloradas的站点1处都显示出高浓度。拉古纳·托图古拉（Laguna Tortuguilla）是生态风险最高的泻湖。必须对镉进行仔细的监测，因为检测到的浓度很高（高达3.4 mg / kg），这对所有泻湖都构成了生态风险。痕量金属的浓度与古巴和世界其他地区未受污染的沿海系统记录的浓度相似。然而，除汞以外，大多数痕量金属在Laguna Las Coloradas的站点1处都显示出高浓度。拉古纳·托图古拉（Laguna Tortuguilla）是生态风险最高的泻湖。由于检测到的镉浓度很高（高达3.4 mg / kg），因此必须对镉进行仔细监测，这对所有泻湖都构成了生态风险。痕量金属的浓度与古巴和世界其他地区未受污染的沿海系统记录的浓度相似。然而，除汞以外，大多数痕量金属在Laguna Las Coloradas的站点1处都显示出高浓度。拉古纳·托图古拉（Laguna Tortuguilla）是生态风险最高的泻湖。由于检测到的镉浓度很高（高达3.4 mg / kg），因此必须对镉进行仔细监测，这对所有泻湖都构成了生态风险。