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Ecosystems are constantly exchanging materials through the movement of air in the atmosphere and water in lakes and rivers. The effects of humans, however, are another major source of connections among ecosystems.In a special issue of the journal Frontiers in Ecology and the Environment on "Continental-scale ecology in an increasingly connected world" (June 2008), ecologists discuss how human influences interact with natural processes to influence global ... More at http://www.nsf.gov/news/news_summ.jsp?cntn_id=111600&govDel=USNSF_51 This is an NSF News item.
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