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Feb

5

2008
 
 

A pile of carp



Fish invasions around the world are linked to GDP, study finds These hungry carp are in a moat, but others are invading rivers near youHuman activities are the best predictor of the extent to which a freshwater ecosystem has been invaded by non-native fish, according to a study published today in PLoS Biology. Fabien Leprieur and colleagues studied data on 9968 fish species from 1055 river basis around the world, their aim being to unravel the mysteries of what makes some areas more prone to non-native invasions than others. Gross domestic product -- which serves as a useful proxy for how much we’ve degraded our environment (the relationship being positive, of course) -- closely mirrors the pattern of fish invasions, with six global hotspots identified: the Pacific coast of North And Central America, southern South America, western and southern Europe, Central Eurasia, South Africa and Madagascar, and southern Australia and New Zealand. Leprieur’s findings are actually good news, because they hint at ways to predict which areas might be most vulnerable to invasions in the future. As the CNRS-Université Paul Sabatier, Toulouse, researcher points out, developing countries with booming economies are the most likely to suffer the same ecological fate as the old empires. At least we can plan for it this time. Source: Leprieur F, Beauchard O, Blanchet S, Oberdorff T & Brosse S (2008) Fish invasions in the world’s river systems: when natural processes are blurred by human activities. PLoS Biology DOI: 10.1371/journal.pbio.0060028 Related story in Conservation magazine: Snakes On Planes Image © Nick Atkinson

Filed Under Community-based conservation, Economics and conservation, Endangered species, Fresh water, Habitat, Invasive species, Monitoring, Restoration, Socio-political issues | 

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