PerspectiveEcology

The Coming Arctic Invasion

Science  08 Aug 2008:
Vol. 321, Issue 5890, pp. 780-781
DOI: 10.1126/science.1160852

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  1. Source regions of potential trans-Arctic invaders.

    Fifty-six molluscan lineages present in the Bering and Chukchi seas (light-blue region) have not yet participated in trans-Arctic expansion but have the potential to do so; 28 of these species extend as far north as the Pribilof Islands and Anadyrski Gulf. Another 19 mollusk species are separated from related temperate Atlantic relatives by a genetic and geographic gap. These numbers exclude North Pacific lineages whose participation in the trans-Arctic interchange during the Pliocene led to the formation of species still living in the high Arctic.

    CREDIT: MAP ADAPTED FROM NASA'S EARTH OBSERVATORY (9)