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Fig. 2


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Photographs of the sampling sites indicating the land use in Del Gato basin. (a): Site 1, in a rural area with intensive fruit and vegetable farming; (b): Site 2, in a periurban zone with additional commercial and industrial activities; (c): Site 3, in an urban area with a high population density and containing precarious dwellings, where sewers and industrial discharges are located in certain sectors.

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