Hydrographic,geomorphologic and fish assemblage relationships in coastal lagoons |
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Authors: | Angel Pérez-Ruzafa Mª Carmen Mompeán Concepción Marcos |
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Institution: | (1) Department of Ecology and Hydrology, University of Murcia, 30100 Murcia, Spain |
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Abstract: | In this study, 40 Atlanto-Mediterranean coastal lagoons were analyzed in order to evaluate the extent to which their ecological
characteristics depend on hydrographic, trophic or geomorphologic features. Fish species richness increases with lagoon volume
and the openness parameter, which characterizes the potential influence of the sea on general lagoon hydrology and is related
to the total transversal area of the inlets, which connect the lagoon to the sea. On the other hand, the number of species
decreases exponentially with the phosphate concentration in water. The fishing yield increases with the chlorophyll a concentration in the water column and exponentially with shoreline development. With respect to the fish assemblage composition,
geomorphologic features alone explain 22% of the variance in the canonical analyses and an additional 75% when including the
hydrographic and trophic characteristics of the lagoon, the latter on its own explaining only 3% of the observed differences. |
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Keywords: | Coastal lagoon Fish assemblages Typification Species richness Fishing yield |
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