Suriname's new species.

• Author: Hardman, Chris

Encouraging news from the amphibian world comes from Suriname, where biologists have discovered five new frog species in an area that shows no sign of the chytrid fungus. The frogs were found along with nineteen other species believed to be new to science, during a Rapid Assessment Program (RAP) conducted by Conservation International (CI). Among the frogs discovered is a neon purple and black member of the genus Atelopus and four Eleutherodactylus species. The survey also yielded five new species of fish, thirteen of dung beetles, and one new species of ant--and turned up a variety of fish thought to be extinct. "New species of Insects are common, but so many new species of amphibians and fishes indicates that this area has a very high overall diversity and likely harbors many more species yet to discover," the authors concluded in their 2007 report.

Since 1990, Conservation International has developed a highly effective way to survey the biological diversity of an area. Experts specific to the region of study spend a week or two categorizing every species they can find in their specialty area. From the program's inception, RAP surveys have uncovered 600 species new to science in 26 countries.

To complete the first comprehensive biological survey of Suriname, thirteen scientists recorded all the bird, mammal, fish, reptile, amphibian, and plant species they could find at the Lely and Nassau plateaus, during two short expeditions in 2005. Located in the remote eastern part of Suriname, both plateaus are relatively intact with healthy savannah forests, high dryland rainforests, and palm swamps.

"The main threat at the moment is illegal gold mining, which is quite rampant in Suriname," says Leeanne Alonso, RAP director and a CI vice president. "They make these huge cleared areas and use arsenic that just washes the gold out of the ground and goes right into the streams." Clean water is particularly important in an area with such a high diversity of amphibian and fish species.

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This region is part of the Guyana Shield, a two-billion-year-old geological formation found underneath Suriname, Guyana, and French Guyana, as well as parts of Colombia, Venezuela, and Brazil. Covering nearly a million square miles, the Guyana Shield supports the largest tract of undisturbed Neotropical forest in the world, where jaguars thrive and giant river otters still play in the streams. In addition to a rich biological population, the Guyana...