Trace Elements and Carbon and Nitrogen Stable Isotopes in Organisms from a Tropical Coastal Lagoon |
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Authors: | A A Pereira B van Hattum J de Boer P M van Bodegom C E Rezende W Salomons |
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Institution: | 1. Institute for Environmental Studies, VU University, De Boelelaan 1087, 1081 HV, Amsterdam, The Netherlands 2. Department of Systems Ecology, VU University, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands 3. Centro de Biociências e Biotecnologia, Laboratório de Ciências Ambientais, Universidade Estadual do Norte Fluminense, Alberto Lamego 2000, CEP 28013-600, Campos dos Goytacazes, Rio de Janeiro, Brazil
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Abstract: | Trace elements (Fe, Mn, Al, Zn, Cr, Cu, Ni, Pb, Cd, Hg, and As) and stable isotope ratios (δ13C and δ15N) were analyzed in sediments, invertebrates, and fishes from a tropical coastal lagoon influenced by iron ore mining and
processing activities to assess the differences in trace element accumulation patterns among species and to investigate relations
with trophic levels of the organisms involved. Overall significant negative relations between trophic level (given by 15N) and trace element concentrations in gastropods and crustaceans showed differences in internal controls of trace element
accumulation among the species of different trophic positions, leading to trace element dilution. Generally, no significant
relation between δ15N and trace element concentrations was observed among fish species, probably due to omnivory in a number of species as well
as fast growth. Trace element accumulation was observed in the fish tissues, with higher levels of most trace elements found
in liver compared with muscle and gill. Levels of Fe, Mn, Al, and Hg in invertebrates, and Fe and Cu in fish livers, were
comparable with levels in organisms and tissues from other contaminated areas. Trace element levels in fish muscle were below
the international safety baseline standards for human consumption. |
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