Global meta-analysis shows pervasive phosphorus limitation of aboveground plant production in natural terrestrial ecosystems

Nat Commun. 2020 Jan 31;11(1):637. doi: 10.1038/s41467-020-14492-w.

Abstract

Phosphorus (P) limitation of aboveground plant production is usually assumed to occur in tropical regions but rarely elsewhere. Here we report that such P limitation is more widespread and much stronger than previously estimated. In our global meta-analysis, almost half (46.2%) of 652 P-addition field experiments reveal a significant P limitation on aboveground plant production. Globally, P additions increase aboveground plant production by 34.9% in natural terrestrial ecosystems, which is 7.0-15.9% higher than previously suggested. In croplands, by contrast, P additions increase aboveground plant production by only 13.9%, probably because of historical fertilizations. The magnitude of P limitation also differs among climate zones and regions, and is driven by climate, ecosystem properties, and fertilization regimes. In addition to confirming that P limitation is widespread in tropical regions, our study demonstrates that P limitation often occurs in other regions. This suggests that previous studies have underestimated the importance of altered P supply on aboveground plant production in natural terrestrial ecosystems.

Publication types

  • Meta-Analysis
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Climate
  • Ecosystem
  • Fertilizers / analysis
  • Nitrogen / analysis
  • Nitrogen / metabolism
  • Phosphorus / analysis*
  • Phosphorus / metabolism
  • Plants / chemistry
  • Plants / metabolism*
  • Soil / chemistry
  • Trees / chemistry
  • Trees / metabolism

Substances

  • Fertilizers
  • Soil
  • Phosphorus
  • Nitrogen