Algunos antecedentes sobre el macrobentos, granulometría y contenidos de petróleo en los sedimentos de dos entradas de mar en Puerto Espora (Tierra del Fuego) contaminados por el derrame del B/T "Metula"
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1977
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Se describe el macrobentos, el contenido de petróleo y la composición granulométrica de los sedimentos de los canales principales de dos entradas de mar cerca de Puerto Espora (Tierra del Fuego) dos a tres años después de ser contaminados por el B/T "Metula" (agosto-septiembre de 1974). La entrada de mar Este presenta un mayor grado de contaminación, y aún contiene un promedio de 3.27% de petróleo en los sedimentos superficiales. En la entrada de mar Oeste, el promedio es de 0.59%. Con la excepción de Ulothrix flacca, un alga verde filamentosa, la entrada Este está prácticamente libre de especies macrobentónicas. La entrada Oeste está también deshabilitada en dos de las tres estaciones estudiadas. La estación más cercana a la desembocadura de esta entrada, sin embargo, sustenta una comunidad de Mytilus chilensis, macroalgas y poliquetos. La escasez de macrobiota bentónica se atribuye a factores ajenos a la contaminación por petróleo.
The macrobenthos, petroleum content and grain-size composition of the sediments of the main channels of two Inlet located near Puerto Espora (Tierra del Fuego) are described two to three years after being contaminated by oil spilled by the VLCC Metula (August-September, 1974). The East Inlet, the more heavily contaminated of the two, still retains an average of 3.27% of oil in its surface sediments. The West ínlet contains only 0.59%. Except for Ulothrix flacca, a filamentous green alga, East Inlet is practi- cally devoid of macrobenthic species. West Inlet is also uninhabitated in two of the three stations studied. The station nearest the mouth of this Inlet, supports a community of Mytilus chilensis, macroalgae and polychaetes. The lack of benthic macrobiota is attributed to factors other than oil contamination.
The macrobenthos, petroleum content and grain-size composition of the sediments of the main channels of two Inlet located near Puerto Espora (Tierra del Fuego) are described two to three years after being contaminated by oil spilled by the VLCC Metula (August-September, 1974). The East Inlet, the more heavily contaminated of the two, still retains an average of 3.27% of oil in its surface sediments. The West ínlet contains only 0.59%. Except for Ulothrix flacca, a filamentous green alga, East Inlet is practi- cally devoid of macrobenthic species. West Inlet is also uninhabitated in two of the three stations studied. The station nearest the mouth of this Inlet, supports a community of Mytilus chilensis, macroalgae and polychaetes. The lack of benthic macrobiota is attributed to factors other than oil contamination.
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Puerto Espora, Contaminación petrolífera
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Anales del Instituto de la Patagonia, Vol. 8, nº 1 - 2, pp. 375 - 388, 1977.