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Zaragoza, Spain

Oscoz J.,University of Navarra | Tomas P.,Laboratorio de Ensayos Tecnicos S.A | Duran C.,Area Calidad de Aguas
Aquatic Invasions | Year: 2010

This paper is the first attempt to compile a list of the non-indigenous aquatic invertebrate species currently known to occur in the Ebro River basin (Northeast Spain). A total of 23 exotic aquatic species have been recorded in this area, and one more (the branchiobdellida Xironogiton victoriensis) may also be present in this Iberian basin. Due to the negative impacts that biological invasions cause to ecosystems and to human activities, it is important to state the introduction pathways and prevent the spread of already introduced species. In order to fight against biological alien species invasions, development of national strategies on invasive alien species and international cooperation are considered essential. © 2010 The Author(s). Source


Tomas P.,Laboratory de Ensayos Tecnicos S.A | Oscoz J.,University of Navarra | Duran C.,Area Calidad de Aguas | Fernandez D.,L.E.S.S. | Marin J.P.,University of Murcia
Aquatic Invasions | Year: 2010

This paper presents the distribution and the ecological parameters of Didymosphenia geminata in the Ebro River basin (Northeast Spain) during the period 2006-2009. The presence of blooms in some rivers in 2009, as in Cinca River in Las Pilas bridge, is reported. D. geminata was found in summer at 24 localities, forming blooms in three of them. It prefers mountainous calcareous rivers, regulated or not, with oligotrophic waters, low flow conditions and well illuminated stretches. In order to prevent nuisance blooms of the species, it is necessary to study its ecology and establish a monitoring network for detecting early stages of blooms in order to take control measures. © 2010 The Author(s). Source

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