?url_ver=Z39.88-2004&rft_id=10.1038%2Fnature05700&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Blain%2C+S&rft.aulast=Blain&rft.aufirst=S&rft.issue=7139&rft.volume=446&rft.date=April+2007&rft.issn=0028-0836&rft.atitle=Effect+of+natural+iron+fertilization+on+carbon+sequestration+in+the+Southern+Ocean&rft.title=Nature&rft.pages=1070-1075&rft.genre=article