Loss of plant species after chronic low-level nitrogen deposition to prairie grasslands

Nature - Tập 451 Số 7179 - Trang 712-715 - 2008
Christopher M. Clark1, David Tilman1
1Department of Ecology, Evolution and Behavior, 100 Ecology, 1987 Upper Buford Circle, University of Minnesota, St. Paul, Minnesota 55108, USA,

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