Volunteers With Ear, Heart For Frogs Sought For Survey

The frogs are calling. The question is, will Georgians who know what they’re hearing answer?

The second year of a calling frog survey in Georgia starts Jan. 15. There are 78 survey routes but only about 30 volunteers lined up to cover them. John Jensen, a senior wildlife biologist with the state Department of Natural Resources, needs some 50 more listeners who can decipher the croaks, trills and peeps of Georgia’s 31 frog species.

It’s not as hard as it sounds. “They’re a lot easier to learn than birds,” Jensen said, explaining that the season, place and call patterns trim the list of frogs that might be sounding off.

The effort is important. The North American Amphibian Monitoring Program survey developed by the U.S. Geological Survey is aimed at tracking regional and national trends in frog distribution and abundance. Given the sensitivity of amphibians to air and water quality changes, those trends can signal environmental problems and shape conservation priorities.

But in Georgia, baseline data is needed first. “You’ve got to know what you’ve got before you know where it’s going,” Jensen said. Which means more survey volunteers with an ear and even a heart for frogs.

Before being assigned one of the pre-set routes scattered across the state, participants must pass an online quiz testing their ability to audibly identify frog species. Helpful resources include http://www.ugapress.org/AmphibsandReptiles.html, which features recordings and photographs as a supplement to the new reference “Amphibians and Reptiles of Georgia.” The DNR Wildlife Resources Division also has available the compact disk "Calls of the Wild – Vocalizations of Georgia's Frogs.” The “public” quiz at http://www.pwrc.usgs.gov/frogquiz/ allows would-be monitors to test drive their skills.

Volunteers are asked to commit to the survey for at least three years, underscoring the need for consistency in citizen-science projects. Routes are run three nights a year, once each in three call periods: Jan. 15-Feb. 28, March 15-April 30 and May 15-June 30.

To sign up or find out more, contact Jensen at Wildlife Resources’ Nongame Conservation Section in Forsyth, (478) 994-1438 or john.jensen@gadnr.org. Details on the North American Amphibian Monitoring Program are available at http://www.pwrc.usgs.gov/naamp/.

Copies of “Calls of the Wild” are $15.36 each, including sales tax and shipping. Mail a check payable to Wildlife Conservation Fund to GA DNR/WRD, Nongame Conservation Section, 116 Rum Creek Drive, Forsyth, GA 31029, ATTN: Frogs of Georgia CD.

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Georgia Gopher Frog Project Filmed For PBS Nature Series

Gopher frogs at a glance

** The species is state-listed as rare and is protected in all states within its range.

** The frogs are found almost exclusively in the longleaf pine ecosystem of the Coastal Plain.

** Adults can grow to about 4 inches long. They spend most of their time in burrows, usually those made by gopher tortoises, in dry, upland sites

** Breeding occurs at fishless, ephemeral (or temporary) and isolated wetlands in longleaf pine forests. Suitable breeding ponds regularly go dry, meaning there are no fish to prey on tadpoles. Breeding peaks in late winter, but can be triggered by heavy rains throughout fall.

** Threats to the species include destruction and changes to favored uplands and wetlands, fish stocked in breeding wetlands, draining wetlands, the decline of gopher tortoises and a lack of natural and prescribed fires.

** Gopher frogs have been found at fewer than 10 sites in Georgia.

They may not have the most photogenic mug, but Georgia’s gopher frogs are making the jump to television.

Award-winning ArgoFilms recorded the recent release of gopher frog metamorphs and tadpoles at Williams Bluffs Nature Preserve for Public Broadcasting System’s Nature series.

Filmmaker Allison Argo sees the restoration project in Early County as “one of the few ... positively good news stories" about amphibians. The one-hour documentary, tentatively scheduled for broadcast in spring, will explore the global decline of amphibians, Argo said.

The work at Williams Bluffs is a partnership involving the Georgia Wildlife Resources Division, Atlanta Botanical Garden, The Nature Conservancy and Joseph W. Jones Ecological Research Center. The goal: Establish a gopher frog population at the 1,980-acre preserve near Blakely. The project is supported by sales of Georgia’s bald eagle and hummingbird license plates and donations to the Give Wildlife a Chance state income tax checkoff.

Gopher frogs are listed as rare throughout their six-state range. They have been documented at fewer than 10 sites in Georgia. Threats to the species, found almost exclusively in the Coastal Plain’s longleaf pine ecosystem, include habitat destruction, the lack of natural and prescribed fires, fish stocked in the frogs’ breeding areas, and the decline of gopher tortoises, which dig burrows the like-named frogs also use.

With a camera running Sept. 11, biologists eased 32 metamorphs and 157 tadpoles into a shallow, seasonal pond. A similar release in August 2007 marked the start of the multiyear project and a first for the frog in this state.

But this time, a tropical storm – Fay – had swamped South Georgia, filling the ephemeral ponds where gopher frogs breed and avoiding last year’s situation where biologists had to create an artificial pond for the legged tadpoles and metamorphs, or young frogs with developed lungs and four legs that no longer need the water.

John Jensen, a senior wildlife biologist with Wildlife Resources’ Nongame Conservation Section, said within a few years the frogs might mature to the point they are returning to the pond to breed. Biologists will then search for egg masses following heavy winter rains, the peak season and weather event for breeding, and set up pitfall traps along a drift fence to catch adult frogs.

Biologists marked legged tadpoles and metamorphs by injecting a fluorescent red elastomer, or rubber, dye under the skin.

According to Argo, a Cape Cod, Mass., filmmaker whose awards include five national Emmys, the documentary will focus attention on the fragile status of amphibians. “More than anything it’s habitat loss and degradation,” Argo said. “And it’s important for the public to be aware of that.”

She said filming was done throughout the U.S and, in Panama and Australia. Read more about ArgoFilms at www.sitestories.com/argofilms/.

In Georgia, sales of the nongame wildlife license plates and the Give Wildlife a Chance income tax checkoff benefit conservation of gopher frogs and other rare species. Both programs are fundraisers for the Wildlife Resources Division’s Nongame Conservation Section, which receives no state funds for its mission to help conserve Georgia wildlife not legally hunted, fished for or trapped, as well as rare plants and natural habitats in the state.

The license plates – featuring a bald eagle or a ruby-throated hummingbird – are available for a one-time $25 fee at county tag offices, by checking the wildlife license plate box on mail-in registrations and through online renewals (http://mvd.dor.ga.gov/tags).

For the checkoff, fill in an amount more than $1 on line 26 of the long state income tax form (Form 500) or line 10 of the short form (Form 500EZ). Contributions can be deducted from refunds or added to payments.

Visit www.georgiawildlife.com for more information, or call Nongame Conservation offices in Social Circle (770-761-3035), Forsyth (478-994-1438) or Brunswick (912-264-7218).

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UGA Study Reveals Ecosystem-Level Consequences of Frog Extinctions

In some parts of the tropics, frogs are the most abundant land vertebrates. This peculiar-looking casque-headed tree frog is one of the estimated hundreds of species of tropical frogs.

Photo by Scott Connelly/UGA

Streams that once sang with the croaks, chirps and ribbits of dozens of frog species have gone silent. They’re victims of a fungus that’s decimating amphibian populations worldwide.

Such catastrophic declines have been documented for more than a decade, but until recently scientists knew little about how the loss of frogs alters the larger ecosystem. A University of Georgia study that is the first to comprehensively examine an ecosystem before and after an amphibian population decline has found that tadpoles play a key role keeping the algae at the base of the food chain productive.

“Many things that live in the stream depend on algae as a base food resource,” said lead author Scott Connelly, a doctoral student who will graduate in December from the UGA Odum School of Ecology. “And we found that the system was more productive when the tadpoles were there.”

The results, which appear in the early online edition of the journal Ecosystems, demonstrate how the grazing activities of tadpoles help keep a stream healthy. The researchers found that while the amount of algae in the stream was more than 250 percent greater after the amphibian population decline, the algae were less productive at turning sunlight and nutrients into food for other members of the ecosystem. Without tadpoles swimming along the streambed and stirring up the bottom, the amount of sediment in the stream increased by nearly 150 percent, blocking out sunlight that algae need to grow.

The study is part of a larger effort known as the Tropical Amphibian Declines in Streams (TADS) project, which also involves researchers from Southern Illinois University, Drexel University and the University of Alabama. The project is now in its third round of funding by the National Science Foundation and was initiated by Catherine Pringle (UGA Odum School of Ecology) and Karen Lips (Southern Illinois University) in 2000 through a Small Grant for Exploratory Research (SGER) from the NSF. Connelly and Pringle are monitoring in-stream effects of the population decline on algae, while other team members are studying how the loss of frogs impacts other organisms and the transfer of energy between streams and the terrestrial communities that surround them. Preliminary data show that the number of snakes that feed on frogs, for example, has plummeted after the population decline.

“We were there before, during and after the extinction event and were able to look at the ecosystem and measure how it changed,” said Pringle, Distinguished Research Professor in the Odum School and study co-author. “Very rarely have scientists been able to do that with respect to any organism.”

The chytrid fungus responsible for declines has steadily marched southeast across Costa Rica and through much of Panama like a storm front, killing up to 90 percent of frogs in afflicted streams. In 2003, the team set up research sites on two streams in the pristine and lush highlands of Panama. One study site had already suffered a catastrophic amphibian decline, while the other had a healthy population but, based on its location, was directly in the path of the fungal disease.

In the first stage of their research, Connelly and Pringle assessed ecosystem changes that occur when tadpoles are experimentally excluded from small areas of both the healthy stream and the frogless stream. They found that the absence of the tadpoles resulted in more sediment and less productive algae.

In late 2004, frogs in the formerly healthy stream began dying. The team reassessed the stream and found that impact of the frog die-off was even greater than they had predicted in their exclusion studies. “We predicted the direction of the change,” Pringle said, “but underestimated its magnitude.”

The UGA research team is continuing to monitor the health of the streams to get valuable, long-term data. So far the stream has not rebounded. “It’s still sad going back,” Connelly said, to which Pringle added: “Once the frogs die, it’s like an incredible silence descends over the whole area. It’s eerie.”

To date, scientists have not found a way to stop the spread of the fungus in the wild. Broadly applying a fungicide to an entire watershed, Connelly said, would kill beneficial fungi that are necessary for a healthy ecosystem.

But scientists can cure individual frogs in captivity by simply swabbing them with a fungicide. Connelly has worked to protect frogs through Amphibian Ark, a global effort supported by zoos, botanical gardens, aquariums and research institutions that aims to ensure the survival of amphibians by collecting and breeding them. The Atlanta Botanical Garden is one of the key breeding sites.

“The one speck of hope is that if we’re able to collect some of these rare animals, we can cure them,” Connelly said. “As long as we have the money to keep a breeding program going, in the future it might be possible to reintroduce them into the wild.”

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