STORY: In the scientific equivalent of the board game Clue, teams of biologists have been sifting spotty evidence and pointing to various culprits in the widespread vanishing of harlequin frogs.
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It looked as if one research team was a winner in 2006 when global warming was identified as the “trigger” in the extinctions by the authors of a much-cited paper in Nature. The researchers said they had found a clear link between unusually warm years and the vanishing of mountainside frog populations.
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Now, in the March 25 issue of PLoS Biology, another team argues that the die-offs of harlequins and some other amphibians reflect the spread and repeated introductions of the chytrid fungus. They question the analysis linking the disappearances to climate change.
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