With our free press under threat and federal funding for public media gone, your support matters more than ever. Help keep the LAist newsroom strong, become a monthly member or increase your support today.
Exploring Tennessee's Caves for New Species
Listen
• 0:00
Cory Holliday of The Nature Conservancy baits a pitfall trap using rotten Limburger cheese to lure tiny insect species that live in Tennessee's caves.
()
Biologist Dr. Jerry Lewis squeezes into a cave crevice to strain a pool of water to collect creatures for further study.
(
Jessica Goldstein, NPR /
)
Not everyone views caves as living, fragile ecosystems. Here, a modern-day cave dweller decorates his "home" with a hodge-podge of household items. The walls are sprayed with several layers of graffiti paint.
(
Jessica Goldstein, NPR /
)
Running underneath the rolling hills of Tennessee lies a still-mysterious and remote network of caverns. Home to more than 8,000 caves, much of the state is considered karstland. This means the layers of rock under the soil are easily hollowed out by ground water through a slow dissolving process.
Many of those caves shelter fragile ecosystems. Biologist Jerry Lewis and Cory Holliday of The Nature Conservancy are helping to discover and protect some of those ecosystems from man's destruction.
Support for LAist comes from
The allure of Tennessee's subterranean world has led to many amateur expeditions. Some of those journeys have ended in tragedy -- either from loss of human life, or destruction and disturbance of fragile cave ecosystems. For this reason, Lewis, his fellow biologists and serious cavers are reluctant to reveal the locations of some of their favorite spots.
Living in an environment devoid of light and organic nutrients, cave organisms have evolved unusual adaptations to survive. Some species of fish are blind, and other creatures that still have eyes flee frantically from outside sources of sensory stimulation. Nothing is wasted in this environment -- for insects and many other life forms, bat guano is a dining option of choice.
NPR correspondent David Kestenbaum joins biologist Dr. Jerry Lewis underground outside Nashville as caves are inventoried and explored for new and threatened species.
For Lewis, each trip below ground has the potential for a "bugasm" -- the discovery of a new species. The first time Lewis had a "bugasm" was when he was still in college. He went caving for fun, found a mysterious creature and sent it in to the Smithsonian Institution. It turned out to be a new species.
Lewis serves as an independent consultant to The Nature Conservancy and other conservation organizations interested in understanding the endemic species that live just below the surface of the earth.
But even keeping a cave location secret doesn't always keep it safe from human activity. Sewage discharges, refuse dumping, even trash thrown into sinkholes can find its way into the deepest parts of caves, with serious repercussions for the fragile ecosystems below ground.
On this Radio Expeditions journey, Kestenbaum visits several caves ranging from pristine dwellings frequented by transient bat colonies and minute crustaceans to a disconcerting example of a cave so badly polluted, it is devoid of life.
Support for LAist comes from
This report was produced by Jessica Goldstein.
Copyright 2022 NPR. To see more, visit https://www.npr.org. 9(MDA1OTI3MjQ5MDEyODUwMTE2MzM1YzNmZA004))
At LAist, we believe in journalism without censorship and the right of a free press to speak truth to those in power. Our hard-hitting watchdog reporting on local government, climate, and the ongoing housing and homelessness crisis is trustworthy, independent and freely accessible to everyone thanks to the support of readers like you.
But the game has changed: Congress voted to eliminate funding for public media across the country. Here at LAist that means a loss of $1.7 million in our budget every year. We want to assure you that despite growing threats to free press and free speech, LAist will remain a voice you know and trust. Speaking frankly, the amount of reader support we receive will help determine how strong of a newsroom we are going forward to cover the important news in our community.
We’re asking you to stand up for independent reporting that will not be silenced. With more individuals like you supporting this public service, we can continue to provide essential coverage for Southern Californians that you can’t find anywhere else. Become a monthly member today to help sustain this mission.
Thank you for your generous support and belief in the value of independent news.
Chip in now to fund your local journalism
(
LAist
)
Trending on LAist
-
What do stairs have to do with California’s housing crisis? More than you might think, says this Culver City councilmember. -
Yes, it's controversial, but let me explain. -
Doctors say administrator directives allow immigration agents to interfere in medical decisions and compromise medical care. -
The Palisades Fire erupted on Jan. 7 and went on to kill 12 people and destroy more than 6,800 homes and buildings. -
People moving to Los Angeles are regularly baffled by the region’s refrigerator-less apartments. They’ll soon be a thing of the past. -
Experts say students shouldn't readily forgo federal aid. But a California-only program may be a good alternative in some cases.
Best of LAist