Abstract
Seabirds play a significant role as bioindicators: they are conspicuous, relatively easy to observe, well-established studied group of organisms, and in the focus of public interest due to pollution in aquatic ecosystem. Systematically, a significant number of man-made chemicals have been introduced in the marine environment and represent the major problem arising in the development worldwide. Many of these chemical contaminants are persistent, known to bioaccumulate and biomagnify through the aquatic food web, affecting species associated with aquatic systems. Dioxins [polychlorinated dibenzo-p-dioxins (PCDD), dibenzofurans (PCDF)] and polychlorinated biphenyls (PCB) concentrations were measured in Kelp gull Larus dominicanus collected from 2006 to 2011 on Marambaia Island, Sepetiba Bay, Rio de Janeiro State, Brazil. Detectable liver concentrations of PCDD Fs -1 and PCBs were found in all samples analyzed. These represent some of the first measurements of PCDD Fs -1 and PCBs in seabirds from this area. Although levels of these contaminants in the tested species currently appear to fall below critical values, a continuous and systematic monitoring on these compounds becomes essential and desirable to not express toxic values in the future.
Highlights
Oceans cover about 70% of the earth's surface.Effects of pollution on marine ecosystems have become a matter of great concern, especially to coastal states (FLEMING et al, 2006)
Effects of pollution on marine ecosystems have become a matter of great concern, especially to coastal states (FLEMING et al, 2006)
Current concerns about connectivity of Maringá, v. 35, n. 3, p. 373-380, July-Sept., 2013 ocean health issues and the relationship to human disease highlight an essential area for research (FLEMING et al, 2006; KNAP et al, 2002)
Summary
Effects of pollution on marine ecosystems have become a matter of great concern, especially to coastal states (FLEMING et al, 2006). The oceans cannot supply an infinite sink for anthropogenic wastes but inadequate attention has been given for evaluating the. Biological Sciences limits of capacity of coastal areas for waste assimilation (KITE-POWELL et al, 2008). Instances of fisheries shortage, spoiled beaches, destroyed coral reefs and wildlife habitat, toxic blooms and lost coastal ecological communities are extensive, with a corresponding determination of cost benefit (KNAP et al, 2002). 373-380, July-Sept., 2013 ocean health issues and the relationship to human disease highlight an essential area for research (FLEMING et al, 2006; KNAP et al, 2002). Enhanced acquaintance and predictive capabilities are required for more effective and sustained development of the marine environment to obtain associated economic benefits and to preserve marine resources
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