Metal concentration in water, sediment and four fish species from Lake Titicaca reveals a large-scale environmental concern

被引:126
作者
Monroy, Mario [1 ,2 ]
Maceda-Veiga, Alberto [3 ]
de Sostoa, Adolfo [1 ,2 ]
机构
[1] Univ Barcelona, Dept Anim Biol, E-08028 Barcelona, Spain
[2] Univ Barcelona, Biodivers Res Inst IRBIO, E-08028 Barcelona, Spain
[3] Cardiff Univ, Cardiff Sch Biosci, Cardiff CF10 3AX, S Glam, Wales
关键词
Endemic fish; Mining contamination; Fisheries; Heavy metals; Bioaccumulation; HEAVY-METALS; POLYCHLORINATED-BIPHENYLS; MEDITERRANEAN RIVER; LEUCISCUS-CEPHALUS; WASTE-WATER; BIOACCUMULATION; MERCURY; PERU; INVERTEBRATES; CONTAMINATION;
D O I
10.1016/j.scitotenv.2014.03.134
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Although intensive mining activity and urban sewage discharge are major sources of metal inputs to Lake Titicaca, the risk posed by metal pollution to wildlife and human populations has been poorly studied. In this study we compared the concentrations of Cu, Zn, Cd, Hg, Pb, Co, and Fe in water, sediment, and two tissues (liver and muscle) of four fish species (Odontesthes bonariensis, Orestias luteus, Orestias agassii, and Trichomycterus riyulatus) across important fishery areas in Lake Titicaca. The concentration of Pb in water at the discharge sites of the main rivers and of most elements, with the exception of Co and Fe, in all fish collected in this study exceeded the safety thresholds established by international legislation. The highest metal concentrations were observed in benthopelagic species, and liver tissue was identified as the main depository for all metals with the exception of mercury. The metal bioaccumulation pattern in fish was weakly related to the metal concentrations in the environment with the exception of Hg at the most polluted location, partly explained by the different metabolic role of essential and non-essential elements and the influence of other factors such as species' ecology and individual traits in the bioaccumulation of most metals. As metal pollution extended across the study area and high metal concentrations were detected in all four fish species, we urge the authorities to enforce legislation for water and fish consumption and to evaluate the effects of metal pollution on fish health. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:233 / 244
页数:12
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