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Capture of Atmospheric Ammonium by Grassland Canopies

G. W. Heil, M. J. A. Werger, W. De Mol, D. Van Dam and B. Heijne
Science
New Series, Vol. 239, No. 4841 (Feb. 12, 1988), pp. 764-765
Stable URL: http://www.jstor.org/stable/1700763
Page Count: 2
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Abstract

Air pollution can cause a decline in species through acidification of the habitat. New data suggest that the decline may be due to eutrophication rather than acidification. In Western Europe, eutrophication largely results from atmospheric ammonium deposition. The amount deposited on vegetation is a function of its canopy structure. Deposition on grasslands has been underestimated, and a significant amount of the deposited ammonium appears to be assimilated by the plant canopy. These quantities are sufficient to initiate changes in the competitive relations among the plant species.

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