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How Arctic plants survived the ice age

How Arctic plants survived the ice age

作者:邵阒  时间:2019-03-06 11:06:02  人气:

INSTEAD of retreating south, it seems some Arctic plants weathered the last ice age in ice-free refuges north of the glaciers. Although ice covered most of the Arctic 18 000 years ago, recent studies show that glaciers never covered eastern Siberia, Alaska and the Yukon Territory. Since fossil plants are very rare in these regions, Richard Abbott of the University of St Andrews resorted to genetic analysis of modern plants to find out what species clung on in the north. In Science (vol 289, p 1343),