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Influence of flow diversions on giant freshwater pearl mussel populations in the Ebro River, Spain

Autor Araujo, Rafael; Álvarez Cobelas, Miguel
Palabras clave Margaritifera auricularia
Endangered species
Fecha de publicación dic-2016
EditorJohn Wiley & Sons
Citación Aquatic Conservation - Marine and Freshwater Ecosystems 26(6): 1145-1154 (2016)
Resumen1. Freshwater mussels, historically a component of freshwater benthic invertebrate biomass, are one of the most imperilled animal groups on the planet. Margaritifera auricularia was once a common freshwater mussel inhabiting large rivers throughout Western Europe. It was believed to be extinct until 1996 when a few small populations were found in Spain and France. 2. Currently M. auricularia is one of the most endangered species in the world. The current status of this mollusc in the Ebro River was surveyed, finding a few adult specimens at only two localities, and many old, empty shells throughout the river. 3. Using a simple analysis of historical hydrological data, dramatic changes in water flow might have led to localized extirpation of this freshwater mussel. 4. Other factors contributing to the slow extirpation of this long-lived invertebrate from other areas of the Ebro Basin include the continuous reduction of water levels during the reproductive season, overharvesting for nacre, construction of impoundments, extinction of fish hosts, and impaired water quality.
URI http://hdl.handle.net/10261/145605
Identificadoresdoi: 10.1002/aqc.2622
e-issn: 1099-0755
issn: 1052-7613
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