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Fish invasions linked to GDP
Photo: ©Ersler Dmitry/iStock.comLeprieur, F. et al. 2008. Fish invasions in the world’s river systems: When natural processes are blurred by human activities. PLoS Biology 6(2):0404-0410.
Invasive species are a problem almost everywhere, but not all parts of the world suffer in equal measure. Are regional differences in numbers of invasives the result of different degrees of human impact, or are some native habitats simply more or less accommodating to outsiders? Ecological theory predicts that an area’s richness in native species may determine its susceptibility to invasion. But a new study finds that, when it comes to freshwater fish, invasions are determined largely by human activity and occur most often in regions with a high level of economic development.
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