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A plant–microbe interaction framework explaining nutrient effects on primary production

Journal Article · · Nature Ecology and Evolution
 [1];  [2];  [3];  [2];  [3];  [3];  [4];  [5];  [5];  [4];  [6];  [6];  [2];  [2];  [7];  [6];  [8];  [4];  [9];  [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Stockholm Univ. (Sweden)
  3. Univ. of South Bohemia, České Budějovice (Czech Republic)
  4. Univ. of Vienna (Austria)
  5. Univ. of Eastern Finland, Kuopio (Finland)
  6. Univ. Hannover (Germany)
  7. Univ. Halle-Wittenberg, Halle (Germany)
  8. Univ. of Greifswald (Germany)
  9. Univ. of Vienna (Austria); International Inst. for Applied Systems Analysis (IIASA), Laxenburg (Austria)
In most terrestrial ecosystems, plant growth is limited by nitrogen and phosphorus. Adding either nutrient to soil usually affects primary production, but their effects can be positive or negative. Here we provide a general stoichiometric framework for interpreting these contrasting effects. First, we identify nitrogen and phosphorus limitations on plants and soil microorganisms using their respective nitrogen to phosphorus critical ratios. Second, we use these ratios to show how soil microorganisms mediate the response of primary production to limiting and non-limiting nutrient addition along a wide gradient of soil nutrient availability. Using a meta-analysis of 51 factorial nitrogen–phosphorus fertilization experiments conducted across multiple ecosystems, we demonstrate that the response of primary production to nitrogen and phosphorus additions is accurately predicted by our stoichiometric framework. The only pattern that could not be predicted by our original framework suggests that nitrogen has not only a structural function in growing organisms, but also a key role in promoting plant and microbial nutrient acquisition. We conclude that this stoichiometric framework offers the most parsimonious way to interpret contrasting and, until now, unresolved responses of primary production to nutrient addition in terrestrial ecosystems.
Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC02-05CH11231; AC05-76RL01830
OSTI ID:
1477396
Alternate ID(s):
OSTI ID: 1494311
Report Number(s):
PNNL-SA--134033; ark:/13030/qt4fn4h0n4
Journal Information:
Nature Ecology and Evolution, Journal Name: Nature Ecology and Evolution Journal Issue: 10 Vol. 2; ISSN 2397-334X
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Global meta-analysis shows pervasive phosphorus limitation of aboveground plant production in natural terrestrial ecosystems journal January 2020
Nutrient dynamics in an Andean forest region: a case study of exotic and native species plantations in southern Ecuador journal August 2019
Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging journal July 2020
Microbial carbon limitation: The need for integrating microorganisms into our understanding of ecosystem carbon cycling journal April 2020
The Role of Plant Litter in Driving Plant-Soil Feedbacks journal October 2019

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