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Science Magazine - One Issue Frogs to Snakes. The impact of amphibian disease on tropical snake communities In c i o i r o i n i a i v i r u s, WHO reformer faces his biggest test yet Abrupt aridity thresholds in ecosystems A regime of topological fragility Pages 713-824 Cover: A satiny parrot snake ( Leptophis depressirostris ) preys on a frog. Tropical snake diversity declined after a fungal pathogen led to mass mortality of amphibians, a key food source. Snakes are generally rare and difficult to detect, but researchers estimate a high probability that the snake community is now smaller and more homogeneous, with lower occurrence rates and poorer body conditions for many species. See page 814. Photo: Bence Mate/Minden Pictures Each additional magazine ships for $1. You have to use the shopping cart to get this discount.