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- W1973704757 abstract "The annelid fauna inhabiting soft bottoms was analysed during February and April, 1997 in the Urías estuary which is mostly surrounded by mangrove swamps, but is also subjected to the effect of several anthropogenic activities. Classification and ordination techniques were used to perform the characterisation of the system based on the annelid assemblages according to environmental variables (mainly organic matter content and percentage of mud). Three zones were found: (1) ‘very polluted zone’, in front of a slaughterhouse and a fish processing factory with a total lack of macrofauna due to the strong enrichment of the sediment in organic matter; (2) ‘polluted zones’, characterised by the sporadic presence of oligochaetes in front of a domestic sewage effluent, by the dominance of Capitella capitata close to a thermoelectric plant, and by the dominance of Streblospio benedicti and oligochaetes in the surroundings of an upstream shrimp farm; (3) ‘unpolluted zones’, in the mouth of the estuary and an area surrounded by mangrove trees, with low organic matter content in sediment, high diversity and no dominant species. La faune d’annélides habitant les sustrats meubles a été analysée en février et en avril 1997 dans l’estuaire d’Urías qui est entièrement ceinturé par une mangrove, mais est également soumis à l’effet de plusieurs activités anthropiques. Des techniques de classification et d’ordination ont été employées pour caractériser le système, basé sur les assemblages d’annélides selon des variables environnementales (contenu en matière organique et pourcentage de vase principalement). Trois zones ont été identifiées : (1) la « zone très polluée », devant un atelier d’abattage et une usine de traitement du poisson, avec un manque total de macrofaune dû à un fort enrichissement du sédiment en matière organique ; (2) les « zones polluées », caractérisées par la présence sporadique d’oligochètes devant un effluent d’égouts domestiques, par la dominance de Capitella capitata près d’une usine thermoélectrique, et par la dominance de Streblospio benedicti et des oligochètes à proximité d’une ferme à crevettes en amont ; (3) la « zone non polluée », dans l’embouchure de l’estuaire et une zone entourée par des arbres de palétuviers, avec une faible teneur en matière organique dans le sédiment, une diversité élevée et aucune dominance d’espèce." @default.
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- W1973704757 date "2002-05-01" @default.
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- W1973704757 title "Annelid assemblages in soft bottoms subjected to human impact in the Urías estuary (Sinaloa, Mexico)" @default.
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- W1973704757 doi "https://doi.org/10.1016/s0399-1784(02)01193-3" @default.
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