Fecal Pollution in Coastal Marine Sediments from a Semi-Enclosed Deep Embayment Subjected to Anthropogenic Activities: An Issue to Be Considered in Environmental Quality Management Frameworks Development |
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Authors: | D González-Fernández M C Garrido-Pérez E Nebot-Sanz D Sales-Márquez |
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Institution: | 1.Department of Environmental Technologies, Centro Andaluz de Ciencia y Tecnología Marinas (CACYTMAR),Universidad de Cádiz,Puerto Real,Spain;2.Department of Environmental Technologies, Faculty of Marine and Environmental Sciences,Universidad de Cádiz,Puerto Real,Spain |
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Abstract: | Sewage discharge is a major source of pollution in marine environments. Urban wastewaters can directly enter marine environments
carrying pathogen organisms, organic loads, and nutrients. Because marine sediments can act as the ultimate fate of a wide
range of pollutants, environmental quality assessment in this compartment can help to identify pollution problems in coastal
areas. In the present study, characterization of surficial marine sediments allowed assessment of fecal pollution in a semi-enclosed
deep embayment that is subjected to anthropogenic activities. Physicochemical parameters and fecal indicators presented a
great spatial heterogeneity. Fecal coliform and Clostridium perfringens showed accumulation in an extensive area, not only in proximity to sewage discharge points, but also in sediments at 100
meters depth. Results included herein demonstrated that, in coastal areas, urban wastewater discharge can affect the whole
ecosystem through accumulation of fecal matter in bottom sediments. Application of multivariate techniques provided useful
information with applicability for management of coastal areas in such complex systems. Environmental implications of wastewater
discharge in coastal areas indicate the need to implement and include sediment quality control strategies in legislative frameworks. |
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