Major pathways and origins of invasive species infestations in the marine environment

Major pathways and origins of invasive species infestations in the marine environment (map/graphic/illustration)

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Major pathways and origins of invasive species infestations in the marine environment. All across the planet, the number and severity of outbreaks and infestations of invasive species (i.e. species purposefully or accidentally introduced in non-native environments) is growing, and invasions of marine habitats are now occurring at an alarming rate. Exotic and invasive species have been identified by scientists and policymakers as a major threat to marine ecosystems, with dramatic effects on biodiversity, biological productivity, habitat structure and fisheries. This graphic presents the major pathways and origins of invasive or exotic species infestations in the marine environment. These patterns are strikingly concurrent with major shipping routes.
Sources Expert judgment by the report authors (Nellemann, C et al)
Cartographer/
Designer
Hugo Ahlenius, UNEP/GRID-Arendal
Appears in In Dead Water - Climate Change, Pollution, Over-harvest, and Invasive Species in the World's Fishing Grounds
Published February 2008
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