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More than 31 freshwater species have 'moved' to Galicia over past century
Date:1/13/2011

Galician researchers have studied the evolution in the introduction of non-native fresh water species in Galicia over the past century, and have compared this with the rest of the Iberian Peninsula. The results show that 31 exotic aquatic species out of the 88 recorded for the entire Iberian Peninsula have become established in the region over the past century.

An analysis of the introduction of non-native species in Galicia and the Iberian Peninsula carried out by researchers from the University of Santiago de Compostela (USC) and the University of Corua (UDC) has shown not only the number of species introduced over the past 100 years, but also the periods during which the greatest number of new species appeared, and also current trends.

It has taken longer for exotic species to be introduced in Galicia than in the rest of the Iberian Peninsula. "While the species introduced in the Iberian Peninsula at the start of the 20th Century took between 80 and 90 years to be recorded in Galicia, this delay has been virtually negligible since the 1990s", Mara J. Servia, coordinator of the study and a researcher at the UDC, tells SINC.

According to Servia, species introduced in the Iberian Peninsula are now detected at "practically" the same time in Galicia. The data analysed show that 1995 marked a turning point, coinciding with the approval of the Schengen Treaty, which opened up the borders of European countries to the free movement of people and goods. From this time on, the pace of introduction of new species in Galicia has been the same as for the rest of Spain.

The study, which has been published in Biodiversity and Conservation, also shows that 31 exotic aquatic species out of the total of 88 recorded throughout the Iberian Peninsula as a whole have become established in Galicia, including fish, amphibians, insects, plants, molluscs, invertebrates, reptiles, mammals and crustaceans.

Some of the most significan
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Contact: SINC
info@plataformasinc.es
34-914-251-820
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

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