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The alpine marmot spreads into the Catalan Pyrenees
Date:3/9/2010

Researchers from the Centre for Ecological Research and Forestry Applications (CREAF) and the Autonomous University of Barcelona (UAB) have demonstrated, using a map of the potential distribution, the alpine marmot's capacity for adaptation in the fields of the Pyrenees. Its quick proliferation makes it a successful example of species introduction.

At the end of the Pleistocene (10,000 years ago), the increase in temperatures brought an end to the alpine marmot (Marmota marmota) in the Pyrenees, but between 1950 and 1988, the French government introduced around 400 specimens into the Pyrenees. The first appearances in Spain date back to 1962-1964 in the valley of Otal (Huesca).

"As an herbivore that lives in colonies, its impact on the flora of the alpine and subalpine fields can be significant. In addition, it can be a key competitor for other herbivores that it coexists with, like the ptarmigan", Bernat Claramunt, main author and researcher in CREAF and in UAB, explains to SINC adding that the impact on the ptarmigan is "very low".

But to determine the magnitude of the direct or indirect effects of the presence of the alpine marmot on the alpine community, the team of scientists from CREAF-UAB, together with the association for environmental studies LUTRA, has ascertained the potential extent of the expansion of this species.

The results, published in Ethology Ecology and Evolution, are visualised on a map showing the potential distribution of the species in the Catalan Pyrenees. In this way, the marmot could occupy all the alpine and subalpine fields of the Pyrenees. In addition, "it is capable of occupying abandoned fields at altitudes lower than its optimum altitudinal level for distribution", points out the Catalan scientist.

The alpine marmot is the largest rodent mammal in Europe. According to some estimates made in 2000, the population is more than 10,000 specimens. Other studies carried out in
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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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