Show simple item record

dc.contributor.authorRamos Merchante, Adrián
dc.contributor.authorSáez Gómez, Pedro 
dc.contributor.authorPrenda Marín, José
dc.identifier.citationRamos Merchante, A., Sáez Gómez, P., & Prenda Marín, J. (2021). Historical distribution of freshwater fishes and the reference conditions concept in a large Mediterranean basin. Aquatic Conservation: Marine and Freshwater Ecosystems. DOI:
dc.description.abstractThe European Water Framework Directive 2000/60/EC (WFD) defines the ecological status of aquatic systems as the deviation between their present biological state and that which would be expected in the absence of any major human disturbance, referred to by the WFD as the ‘reference condition’ (RC). It assumes that their biotic composition should remain balanced and constant over time. This study tested both assumptions against an analysis of the historical distribution of the fish fauna in a large and highly disturbed Mediterranean basin. If fish communities change substantially over time, it will mean that the validity of the RC concept comes into question. Using presence/absence data for historical native fish fauna from the Guadalquivir Basin, distribution changes among sub‐basins were quantified by mapping between the nineteenth century and today. The range of two native species (Anguilla anguilla and Salmo trutta) has changed significantly. In addition, the diadromous species assemblage has almost become locally extinct, with the exception of the eel. Finally, most Guadalquivir sub‐basins (94.7%) have suffered major changes in the composition of their fish communities, either by losing native species or by adding new non‐native species. These results render the definition of any RC unlikely. In Mediterranean areas, the WFD objective of ‘good ecological status’ recovery based on the integrity of aquatic communities is a theoretical rather than a real goal. Nonetheless, the WFD provides an ecological guiding principle that can also be transferred to the conservation of freshwater ecosystems. As an alternative to the RC concept in Mediterranean lotic ecosystems, specific multimetric indices can be used, based on expert criteria, the metrics of which can also relate to the conservation value of water bodies, and not only to their ecological status.es_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherEcological statuses_ES
dc.subject.otherWater Framework 46 Directivees_ES
dc.subject.otherAlien specieses_ES
dc.titleHistorical distribution of freshwater fishes and the reference conditions concept in a large Mediterranean basines_ES
dc.identifier.doi1099-0755 (electrónico)

Files in this item

This item appears in the following Collection(s)

Show simple item record

Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España

Copyright © 2008-2010. ARIAS MONTANO. Repositorio Institucional de la Universidad de Huelva
Contact Us | Send Feedback |