INVESTIGADORES
MENONE Mirta Lujan
artículos
Título:
The role of burrowing beds and burrows of the SW Atlantic intertidal crab Chasmagnathus granulata in trapping organochlorine pesticides.
Autor/es:
MENONE, ML; MIGLIORANZA, KSB;IRIBARNE, O; AIZPÚN DE MORENO, JE AND MORENO, VJ.
Revista:
MARINE POLLUTION BULLETIN
Referencias:
Año: 2004 p. 240 - 247
ISSN:
0025-326X
Resumen:
The effect of crab beds and bioturbation activity of the SW Atlantic intertidal crab Chasmagnathus granulata on the organochlorine
pesticide (OCP) concentrations in Bahýa Blanca estuary, Argentina were studied. Total OCP concentration was significantly
lower inside than outside the crab burrows. Nevertheless, the concentrations from outside the crab beds were lower than from
outside crab burrows, which indicated that crab beds act as sinks of sediment-bound OCP due to the bioturbation activities of the
crabs. The same distribution patterns were found in all sediments as well as in crabs, being cyclodienes > HCHs > DDTs, although
large amounts of metabolites rather than the respective parental were found in the organism showing the capacity of C. granulata for
metabolising parental compounds. These more water-soluble compounds are excreted by the faeces and finally removed by tidal
flushing to the sea. Our results suggest that crabs when present play a role in the distribution of sediment-bound OCP and the crab
beds are modifiers of the dynamic of organic pollutants in estuarine areas.Chasmagnathus granulata on the organochlorine
pesticide (OCP) concentrations in Bahýa Blanca estuary, Argentina were studied. Total OCP concentration was significantly
lower inside than outside the crab burrows. Nevertheless, the concentrations from outside the crab beds were lower than from
outside crab burrows, which indicated that crab beds act as sinks of sediment-bound OCP due to the bioturbation activities of the
crabs. The same distribution patterns were found in all sediments as well as in crabs, being cyclodienes > HCHs > DDTs, although
large amounts of metabolites rather than the respective parental were found in the organism showing the capacity of C. granulata for
metabolising parental compounds. These more water-soluble compounds are excreted by the faeces and finally removed by tidal
flushing to the sea. Our results suggest that crabs when present play a role in the distribution of sediment-bound OCP and the crab
beds are modifiers of the dynamic of organic pollutants in estuarine areas.ýa Blanca estuary, Argentina were studied. Total OCP concentration was significantly
lower inside than outside the crab burrows. Nevertheless, the concentrations from outside the crab beds were lower than from
outside crab burrows, which indicated that crab beds act as sinks of sediment-bound OCP due to the bioturbation activities of the
crabs. The same distribution patterns were found in all sediments as well as in crabs, being cyclodienes > HCHs > DDTs, although
large amounts of metabolites rather than the respective parental were found in the organism showing the capacity of C. granulata for
metabolising parental compounds. These more water-soluble compounds are excreted by the faeces and finally removed by tidal
flushing to the sea. Our results suggest that crabs when present play a role in the distribution of sediment-bound OCP and the crab
beds are modifiers of the dynamic of organic pollutants in estuarine areas.C. granulata for
metabolising parental compounds. These more water-soluble compounds are excreted by the faeces and finally removed by tidal
flushing to the sea. Our results suggest that crabs when present play a role in the distribution of sediment-bound OCP and the crab
beds are modifiers of the dynamic of organic pollutants in estuarine areas.