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Root and shoot competition lead to contrasting competitive outcomes under water stress: A systematic review and meta-analysis

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  • Alicia J Foxx
  • Florian Fort

Abstract

Background: Competition is a critical process that shapes plant communities and interacts with environmental constraints. There are surprising knowledge gaps related to mechanisms that belie competitive processes, though important to natural communities and agricultural systems: the contribution of different plant parts on competitive outcomes and the effect of environmental constraints on these outcomes. Objective: Studies that partition competition into root-only and shoot-only interactions assess whether plant parts impose different competitive intensities using physical partitions and serve as an important way to fill knowledge gaps. Given predicted drought escalation due to climate change, we focused a systematic review–including a meta-analysis on the effects of water supply and competitive outcomes. Methods: We searched ISI Web of Science for peer-reviewed studies and found 2042 results. From which eleven suitable studies, five of which had extractable information of 80 effect sizes on 10 species to test these effects. We used a meta-analysis to compare the log response ratios (lnRR) on biomass for responses to competition between roots, shoots, and full plants at two water levels. Results: Water availability treatment and competition treatment (root-only, shoot-only, and full plant competition) significantly interacted to affect plant growth responses (p

Suggested Citation

  • Alicia J Foxx & Florian Fort, 2019. "Root and shoot competition lead to contrasting competitive outcomes under water stress: A systematic review and meta-analysis," PLOS ONE, Public Library of Science, vol. 14(12), pages 1-17, December.
    • Handle: RePEc:plo:pone00:0220674
    DOI: 10.1371/journal.pone.0220674
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    References listed on IDEAS

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    1. Jeffrey C. Valentine & Therese D. Pigott & Hannah R. Rothstein, 2010. "How Many Studies Do You Need?," Journal of Educational and Behavioral Statistics, , vol. 35(2), pages 215-247, April.
    2. David Moher & Alessandro Liberati & Jennifer Tetzlaff & Douglas G Altman & The PRISMA Group, 2009. "Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement," PLOS Medicine, Public Library of Science, vol. 6(7), pages 1-6, July.
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