Amphibians
Jollyville Plateau Salamander
Eurycea tonkawae · also called Jollyville Plateau salamanders
Within a cave stream on the edge of a fast-growing Texas city, a Jollyville Plateau salamander drifts through water shaped as much by stormwater runoff and groundwater management decisions above ground as by anything happening within the cave itself.
Overview
The Jollyville Plateau salamander, Eurycea tonkawae, is a fully aquatic salamander native to springs and cave systems within the Jollyville Plateau area near Austin, Texas. Its position within one of the fastest-growing metropolitan areas in the country makes it one of the more directly urban-development-exposed rare salamanders in North America.
A salamander sharing its watershed with a city
While most range-restricted salamanders face threats from rural land use or drought, the Jollyville Plateau salamander must also contend with the specific pressures of urban growth, tying its survival directly to how carefully a nearby city manages its own stormwater and groundwater.
Status
Vulnerable — restricted to springs and cave systems within a rapidly urbanising area near Austin, Texas.
Jollyville Plateau Salamander: common questions
Why is the Jollyville Plateau salamander especially vulnerable compared to other rare salamanders?
The Jollyville Plateau salamander occupies springs and cave systems within a rapidly growing metropolitan area near Austin, Texas, meaning the species faces continuous pressure from urban development, impervious surface runoff, and groundwater contamination in a way that more remote, rural range-restricted salamanders typically do not experience to the same degree.
Does the Jollyville Plateau salamander live in just one spring?
No, unlike some of its similarly restricted relatives confined to a single spring outflow, the Jollyville Plateau salamander occupies a somewhat broader network of springs and cave systems across the Jollyville Plateau area, though this network remains entirely limited to one specific part of the Edwards Aquifer near Austin.
Is the Jollyville Plateau salamander related to other Texas cave salamanders?
Yes, the Jollyville Plateau salamander belongs to the same broader group of Edwards Aquifer-dependent Eurycea salamanders as several other Texas spring and cave species, such as the Comal Springs salamander and Barton Springs salamander, each restricted to its own specific portion of the aquifer system.
What is the biggest threat to the Jollyville Plateau salamander?
Ongoing urban development pressure, impervious surface runoff, and altered groundwater patterns within its rapidly growing watershed pose a direct and continuing threat to the springs and cave systems the Jollyville Plateau salamander depends on, making urban planning and stormwater management directly relevant to the species' survival.