Why are most amphibians unable to tolerate living in desert biomes?

Most amphibians are unable to tolerate living in desert biomes primarily due to their permeable skin, which makes them highly susceptible to dehydration. They rely on moist environments for breeding and skin respiration, and the extreme temperatures and aridity of deserts create conditions that are inhospitable for their survival. Additionally, their life cycles often require aquatic habitats for reproduction, which are scarce in desert regions. Consequently, the lack of water and suitable habitats limits their ability to thrive in such environments.