Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Influence of Nitrogen Loading and Species Composition on the Carbon Balance of Grasslands

David A. Wedin and David Tilman
Science
New Series, Vol. 274, No. 5293 (Dec. 6, 1996), pp. 1720-1723
Stable URL: http://www.jstor.org/stable/2890955
Page Count: 4
  • More info
  • Cite this Item
Influence of Nitrogen Loading and Species Composition on the Carbon Balance of Grasslands
Preview not available

Abstract

In a 12-year experimental study of nitrogen (N) deposition on Minnesota grasslands, plots dominated by native warm-season grasses shifted to low-diversity mixtures dominated by cool-season grasses at all but the lowest N addition rates. This shift was associated with decreased biomass carbon (C):N ratios, increased N mineralization, increased soil nitrate, high N losses, and low C storage. In addition, plots originally dominated by nonnative cool-season grasses retained little added N and stored little C, even at low N input rates. Thus, grasslands with high N retention and C storage rates were the most vulnerable to species losses and major shifts in C and N cycling.

Page Thumbnails

  • Thumbnail: Page 
1720
    1720
  • Thumbnail: Page 
1721
    1721
  • Thumbnail: Page 
1722
    1722
  • Thumbnail: Page 
1723
    1723