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Biotic resistance by native predators can limit the geographic range and abundance of non-native species following introduction into an ecosystem. Here we tested the hypothesis that the strength of predation pressure varies with latitude and limits the abundance and northward expansion of the non-native green porcelain crab, Petrolisthes armatus, whose northern range is also hypothesized to be limited...
While environmental DNA (eDNA) approaches have the potential to revolutionize biodiversity research and monitoring, most aquatic biomonitoring and management programs still rely on conventional monitoring methodologies. Here we evaluated the suitability and robustness of an eDNA-based approach for the detection of the crayfish plague agent Aphanomyces astaci and assessed the capacity of this new method...
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