Incidencia de los atropellos sobre la fauna vertebrada en el Valle de El Paular. LIC "Cuenca del río Lozoya y Sierra Norte". Espinosa, A., Serrano, J. A., & Montori, A. Munibe (Ciencias Naturales-Natur Zientziak), 60:209–236, 2012.
abstract   bibtex   
Roads are one of the most important human agents of habitat transformation. They are one of the most relevant agents of habitat fragmentation and transformation of natural systems and act as a nonspecific predator. Several studies have shown that they are the first cause of mortality of many amphibian species such as the Common Toad Bufo bufo (Linnaeus, 1758) in Spain. In the study area a previous work points out the major road mortality incidence in two species: Bufo calamita Laurenti, 1768 and Bufo bufo. In order to analyze the current situation of the impact and to extend the study area we have selected 13 stretches of 1 km in the M-604 and M-611 roads located in the “LIC del Alto Lozoya”. Each transect was surveyed walking in both directions three times a month for two years from March 2009. The transects were characterized considering the following variables: altitude, tree cover, the degree of humanization (very low, low and medium) and the dominant vegetation. Tree cover values were estimated for a range of 20m on either side of the road. Visits to the selected transects were performed with an average interval of 9 days. The specimens were removed from the road when it was possible. In total 934 samplings were carried out. No differences were found in the number of road-killed vertebrates by day, but there are clear differences in the distribution throughout the year. Only two environmental variables showed significant differences: degree of humanization and habitat. However, Bonferroni post hoc test indicates that for amphibians and birds only significant differences between habitats and a degree of humanization exists.
@article{espinosa_incidencia_2012,
	title = {Incidencia de los atropellos sobre la fauna vertebrada en el {Valle} de {El} {Paular}. {LIC} "{Cuenca} del río {Lozoya} y {Sierra} {Norte}"},
	volume = {60},
	issn = {0214-7688},
	abstract = {Roads are one of the most important human agents of habitat transformation. They are one of the most relevant agents of habitat fragmentation and transformation of natural systems and act as a nonspecific predator. Several studies have shown that they are the first cause of mortality of many amphibian species such as the Common Toad Bufo bufo (Linnaeus, 1758) in Spain. In the study area a previous work points out the major road mortality incidence in two species: Bufo calamita Laurenti, 1768 and Bufo bufo. In order to analyze the current situation of the impact and to extend the study area we have selected 13 stretches of 1 km in the M-604 and M-611 roads located in the “LIC del Alto Lozoya”. Each transect was surveyed walking in both directions three times a month for two years from March 2009. The transects were characterized considering the following variables: altitude, tree cover, the degree of humanization (very low, low and medium) and the dominant vegetation. Tree cover values were estimated for a range of 20m on either side of the road. Visits to the selected transects were performed with an average interval of 9 days. The specimens were removed from the road when it was possible. In total 934 samplings were carried out. No differences were found in the number of road-killed vertebrates by day, but there are clear differences in the distribution throughout the year. Only two environmental variables showed significant differences: degree of humanization and habitat. However, Bonferroni post hoc test indicates that for amphibians and birds only significant differences between habitats and a degree of humanization exists.},
	language = {es},
	journal = {Munibe (Ciencias Naturales-Natur Zientziak)},
	author = {Espinosa, Alfredo and Serrano, José Antonio and Montori, Albert},
	year = {2012},
	keywords = {⛔ No DOI found},
	pages = {209--236},
}
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