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Wildlife officials make plans to rescue endangered species from Texas drought
LUBBOCK, Texas -- Federal officials are readying plans to evacuate a small number of endangered species in Texas as a severe drought lowers water levels and threatens the survival of rare wildlife in the state's huge ecosystem.
Months with almost no rain have caused water levels to drop by half or more in many rivers, lakes and other bodies of water, including springs in the central Texas Hill Country that are the only remaining habitat for populations of small fish, amphibians and other creatures.
If the water continues to drop sharply, U.S. Fish and Wildlife Service officials are preparing to net up large samples from the springs to take to a hatchery for preservation.
Such evacuations have been rare in the past, with one ordered in 2000 to rescue several species of mussels in Georgia. But such emergency measures could become more frequent if the drought here continues for months or years, as many forecasters predict. Texas is home to 86 endangered and threatened species.
"We're definitely concerned," Fish and Wildlife Service biologist Tom Brandt said.
"I think we have moved to another step in making sure everything is ready. We're in a planning stage right now."
The evacuations would begin if water levels in two declining springs drop by more than another 50 percent, after similar reductions in recent months.
Only 9.6 inches of rain has fallen on average across Texas this year, a little more than half the normal amount. Fish are dying in lakes and rivers from lack of water and low oxygen levels.
Growth of vegetation for animal habitat is down dramatically.
"Texas flora and fauna are adapted to the harsh, extreme conditions. However, this particular drought is testing the limits of native populations," said Cindy Loeffler, a water resource expert with Texas Parks and Wildlife Department.
The lack of rainfall is intensifying competition for scarce water among wildlife, agriculture and local users. In this case, the Edwards Aquifer, which feeds the two springs that contain the vulnerable species, also provides water to almost two million people as well as for irrigation. The state has imposed new pumping restrictions on some water users and suspended the water rights of others. Federal law bars harming threatened species.
The Comal and San Marcos springs are the largest in Texas. The San Marcos Springs are on the bottom of a 16-acre lake, percolating water up through fissures in the limestone lake bottom. Comal Springs is in a secluded area of oak and cedar trees in a park in New Braunfels.
The springs contain the only remaining populations of two small fish, the fountain darter and the San Marcos gambusia; the Texas blind salamander; the San Marcos salamander; the Comal Springs Riffle beetle, the Comal Springs Dryopid beetle, the Peck's cave amphipod, an invertebrate; and Texas wild rice. In fact, the San Marcos gambusia hasn't been seen since the early 1980s and could already be extinct.