Trace element trophic transfer in aquatic food webs. Recibido: 07 de junio de Aceptado: 19 de octubre de In this review I discuss the importance of the processes of trophic transfer of trace elements TTET in aquatic food chains and webs, and suggest some tools and strategies for their study.

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Trace element trophic transfer in aquatic food webs. Recibido: 07 de junio de Aceptado: 19 de octubre de In this review I discuss the importance of the processes of trophic transfer of trace elements TTET in aquatic food chains and webs, and suggest some tools and strategies for their study.

The ET essential and nonessential are trophi-cally transferred and can accumulate up to toxic levels in organisms, populations and communities. The processes of TTET are very complex due to the many factors that affect them. The characteristic high productivity, diversity and environmental seasonality associated with subtropical coastal ecosystems, pose additional complexity to the already difficult study of such processes.

Today's modern techniques and methods of study facilitate the understanding and evaluation of such processes. There are math-ematical models e. These mechanisms can be measured experimentally in the laboratory by using radiotracers and heavy metal's isotopes artificially enriched.

The increasing pollution by, to-gether with the simultaneous eutrophication occurring in the Mexican coasts, emphasizes the urgency to study and assess TTET processes, as well as the derived environmental and public health risks.

Key words: Metal pollution, food chain and web, bioaccumulation, biomagnification, eutrophication. TTet en ecosistemas costeros subtropicales.

A estas herramientas se suma una estrategia combinada de estudios de campo y de laboratorio. Hasta hace poco tiempo, no se consideraba que la tasa de ingesta fuera relevante en el estudio de la TTET. Por otro lado, los valores de k e para elementos esenciales e. En este punto se tienen dos escenarios. Aunque es complicado y costoso mantener durante todo el ciclo de vida a especies longevas. Montes y F. Amiard, J. Metayer, J. Study on the transfer of Cd, Pb, Cu and Zn in neritic and estuarine trophic chains.

The inner estuary of the Loire France in the summer of Water Research Barwick, M. Biotransference and biomagnification of selenium, copper, cadmium, zinc, arsenic and lead in a temperate seagrass ecosystem from Lake Macquarie Estuary, NSW, Australia. Marine Environmental Research Bryan, G. Bioavailability, accumulation and effects of heavy metals in sediments with special reference to United Kingdom estuaries: a review.

Environmental Pollution 76 2 : Cabana, G. Tremblay, J. Pelagic food chain structure in Ontario lakes: A determinant of mercury levels in lake trout Salyelinus namaycush. Canadian Journal Fish Aquatic Science Croteau, M. Trophic transfer of metals along freshwater food webs: evidence of cadmium biomagnification in nature.

Limnology and Oceanography Dehn, L. Follmann, D. Thomas, G. Sheffield, C. Rosa, L. Trophic relationships in an Arctic food web and implications for trace metal transfer. Science Total Environmental Dietz, R. Riget, A. Cleemann, P. Comparison of contaminants from different trophic levels and ecosystems. Fisher, N. Influence of food composition on the biokinetics and tissue distribution of zinc and americium in mussels.

Marine Ecology Progress Series The trophic transfer of metals in marine systems. Stupakoff, S. Sanudo-Wilhelmy, W. Wang, J. Teyssie, S. Trace metals in marine copepods: a field test of a bioaccumulation model coupled to laboratory uptake kinetics data.

Toxicology tests with aquatic animals need to consider the trophic transfer of metals. Fowler, S. Biological transfer and transport processes. Forster, U. Metal Pollution in the Aquatic Environment. Springer-Verlag, Berlin. Acute toxicity of copper, zinc, iron, and manganese and of the mixtures copper-zinc and iron-manganese to whiteleg shrimp Litopenaeus vannamei postlarvae. Bulletin of Environmental Contamination and Toxicology 71 1 : Castro-Longoria, G. Abad-Rosales, F. Aquaculture : Voltolina, I.

Toxicity of metal mixtures to the Pacific white shrimp Litopenaeus vannamei postlarvae. Marine Environmental Research 68 5 : Fry, B. Betancourt-Lozano, L. Total mercury content found in edible tissues of top predator fish from the Gulf of California, Mexico.

Toxicological and Environmental Chemistry 89 3 : Gray, J. Biomagnification in marine systems: the perspective of an ecologist. Marine Pollution Bulletin Hattum van B. Abiotic and biotic factors influencing in situ trace metal levels in macroinvertebrates in freshwater ecosystems. Environmental Toxicology Chemistry Jara-Marini, M. Trophic relationships and transference of cadmium, copper, lead and zinc in a subtropical coastal lagoon food web from SE Gulf of California.

Chemosphere Mercury transfer in a subtropical coastal lagoon food web SE Gulf of California under two contrasting climatic condition. Environmental Toxicology 30 7 : Kidd, K.

Hesslein, R. The influence of trophic level as measured by N on mercury concentrations in freshwater organisms. Water Air Soil Pollution Landrum, P. Toxicokinetics in aquatic systems: model comparisons and use in hazard assessment. Lankford, R.

Coastal lagoons of Mexico, their origin and classification. In: Wiley M, Ed. Estuarine Processes. New York: Academic Press. Lindqvist, 0. Johansson, M.


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