 Anthropogenic climate change has likely exerted a major effect on amphibian declines . For example , in the Monteverde Cloud Forest , a series of unusually warm years led to the mass disappearances of the Monteverde Harlequin frog and the Golden Toad . An increased level of cloud cover , a result of geoengineering and global warming , which has warmed the nights and cooled daytime temperatures , has been blamed for facilitating the growth and proliferation of the fungus Batrachochytrium dendrobatidis ( the causative agent of the fungal infection chytridiomycosis ) . 
