Geographic Information System Apliedto the Research of Species in Danger of Extinction. The Brown Bear Case (original) (raw)

Abstract

The brown bear (Ursus arctos) is one of the Spanish mammaIs in danger of extinction. Due to its high mobility and behaviour it is extremely difficult to keep sign of each individual of the popoIation. For this reason, a set of seasonal maps of the available trophic resources has been developed to allocate bear activity. These maps are the product of data base developed with a Geographical Infonnation System. Our study area (176 km2) is located in the Somiedo Natural Park (Asturias, NW Spain). The map set has allowed to restriet the sampling bear activity to the selected enviroomentaI units. These selected areas coostitute 54.58% of the totaI of the area of study during Spring, 12.17% during Summer and 28.23% during Autumn. These maps have allowed a selective sampling (trails) of key areas with a remarkable increase in the number of bear signs: an average of one point with sings of bear activity every 2.73 km covered. This result has been supposed to increase by six the effectiveness...

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