Nitrogen limitation of net primary productivity in terrestrial ecosystems is globally distributed.

  title={Nitrogen limitation of net primary productivity in terrestrial ecosystems is globally distributed.},
  author={David LeBauer and Kathleen K. Treseder},
  volume={89 2},
Our meta-analysis of 126 nitrogen addition experiments evaluated nitrogen (N) limitation of net primary production (NPP) in terrestrial ecosystems. We tested the hypothesis that N limitation is widespread among biomes and influenced by geography and climate. We used the response ratio (R approximately equal ANPP(N)/ANPP(ctrl)) of aboveground plant growth in fertilized to control plots and found that most ecosystems are nitrogen limited with an average 29% growth response to nitrogen (i.e., R… 

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