Terrestrial Movement Patterns of the Common Toad (Bufo bufo) in Central Spain Reveal Habitat of Conservation Importance
2012
Daversa, D. R. | Muths, E. | Bosch, J.
Widespread amphibian declines and habitat fragmentation, coupled with advancements in tracking, have sparked increased emphasis on studying movements and the use of terrestrial habitats by amphibians. Peñalara Natural Park, Sierra de Guadarrama, Central Spain, provides habitat for a number of amphibians that use upland sites. In response to increased pressure on habitat in this region by tourism, we used 4 months of radiotelemetry data for 17 adult Common Toads (Bufo bufo) to characterize the terrestrial movements, assess the factors influencing these movements, and determine the distribution and cover characteristics of summer refugia for these toads. We found that: 1) movements were most pronounced following the breeding season in June, and adults made movements of up to 470 m away from breeding sites, 2) movements were not influenced by basin size, climatic variables, or the sex of the individual, 3) the amount of terrestrial habitat used by toads ranged from 245 m² to 2.5 ha, and 4) within these areas toads most often used rock piles and juniper patches (Juniperus communis nana) as cover during the summer. Our study emphasizes the importance of considering terrestrial landscapes when developing conservation strategies, and we suggest that a buffer of minimal development extending 550 m from the shoreline of each natal pond be considered when conservation plans are developed for Common Toad habitat in Peñalara Natural Park.
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