(NPS Photo by L. Gelatt)
The semiarid environment of the
Amphibians are very sensitive to their terrestrial and aquatic environments, changes in either can effect their survival and propagation. Like the “canary in a coal mine”, amphibians are considered indicator species that serve as monitors of the environment. Over the last several years scientists have documented an alarming decline in amphibian populations, some to the point of extinction. While a specific reason for this trend is unknown, there are several possibilities being studied. Pollution, acid rain, global warming, loss of habitat, and non-native predators / competitors are just a few of the changes that may be causing the declining populations.
Amphibian populations within
Did You Know?
Colorado National Monument's 23-mile Rim Rock Drive was built almost entirely using picks, shovels, and sheer muscle strength to remove massive rocks and debris. The engineering skill of Rim Rock Drive workers can be seen today in the road's tunnels and stonework. More...