Over the last 30 years amphibian species have been in decline. During this time 168 of the 5,743 known species have become extinct, with many more in danger. Climate change, including pollution, declining habitat and increased UV light. Amphibians do not have thick skins and their eggs are without shells making their entire life cycle sensitive to temperature and moisture changes. Simultaneous pressures of temperature increases, loss of habitat and disease are currently putting too much pressure on the amphibian species for them to adapt and maintain numbers.
Many frogs are very temperature sensitive. For example, some dart frogs live in the rainforest where temperatures fluxuate very little. The frogs cannot stand temperatures that are too hot or too cold, even by a change of a couple of degrees. As climate changes and temperatures begin to rise, the frogs cannot withstand the stress. They are dying.
Other frogs are dying from chytridiomycosis, which is a fungus that coats the skin of the frogs. The fungus can only grow in certain temperatures. Some scientists believe that climate change may be linked to the spread of the fungus.
Furthermore, frogs live in the water as tadpoles (for most species) and on land during adulthood. Changes in temperature also affect the water temperature, leading to changes in algae (the food of tadpoles) and living conditions.
Frogs are endangered all over the world and efforts must be continued and increased to try to save them.
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