Use of an Agroecosystem by the Threatened Dart Poison Frog Andinobates virolinensis (Dendrobatidae)

摘要

Conversion of forested habitats to human land-uses is a primary cause of amphibian declines in tropical regions (Alford and Richards 1999; Vie et al. 2009; Robinson et al. 2013; Kurz et al. 2014). Amphibians may be susceptible to habitat alterations because of their sensitivity to microclimate changes， limited dispersal capacities, and high susceptibility to desiccation (Nowa-kowski et al. 2013; Robinson et al. 2013; Mendenhall et al. 2014). Previous studies at tropical latitudes have shown that human habitat disturbance generates changes in the structure and composition of amphibian ensembles, promotes the spread of gener- alists and alien species, and probably leads to local extinctions of species (Urbina-Cardona et al. 2006; Isaacs and Urbina-Cardona 2011; Cortés-Gómez et al. 2013）. Given the unprecedented rate of habitat loss in many tropical regions, scientists have focused on assessing the potential of human-altered landscapes, such as agroecosystems, as an alternative approach to biodiversity conservation (Schroth et al. 2004; Somarriba et al. 2004).