Central Texas salamanders, including newly identified species, at risk of extinction

January 14, 2019, University of Texas at Austin

Biologists at The University of Texas at Austin have discovered three new species of groundwater salamander in Central Texas, including one living west of Austin that they say is critically endangered. They also determined that an already known salamander species near Georgetown is much more endangered than previously thought.

Writing today in the journal Proceedings of the National Academy of Sciences, the team, which includes one of the scientists who identified the endangered Barton Springs salamander, warns that more severe droughts caused by climate change and increasing water use in Central Texas have left groundwater salamanders "highly vulnerable to extinction."

The groundwater salamanders of Central Texas—just 2 to 3 inches long—swim in springs, underwater caves and channels deep within limestone rock and are keystone species in the local Edwards and Trinity aquifers. As top predators, they help maintain the health of aquifer ecosystems, meaning they are key for preserving water quality in the aquifers that local residents depend on for nearly all the fresh water supplying nearby cities, industries and agriculture. The loss of these salamanders would compromise the delicate aquifer systems of which they are a critical part, the biologists said.

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