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Related Experiment Video

Updated: May 12, 2025

Author Spotlight: Discovering New Biopesticides from Bioactive Soil Microbe-Derived Natural Products
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Author Spotlight: Discovering New Biopesticides from Bioactive Soil Microbe-Derived Natural Products

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The biocontrol paradox.

Stephen P Bonser1, Violaine Gabriel1, Karen Zeng1

  • 1Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney 2052, Australia.

Trends in Ecology & Evolution
|April 16, 2025
PubMed
Summary
This summary is machine-generated.

Biocontrol agents may fail against invasive plants because they can boost group performance. By reducing individual plant competition, biocontrol can unexpectedly enhance the success of invasive plant monocultures.

Keywords:
cooperative and competitive strategiesgrowth defence trade-offinvasive speciesshade avoidance syndrome

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Area of Science:

  • Ecology
  • Invasive Species Management
  • Biological Control

Background:

  • Biocontrol agents often fail to control invasive plants despite reducing individual plant performance.
  • Invasive plant success depends on both individual plant traits and group dynamics in monocultures.

Purpose of the Study:

  • To explore why biocontrol agents sometimes fail to control invasive plants.
  • To differentiate between individual plant performance and group performance in invasive plant monocultures.

Main Methods:

  • The study theoretically examines resource allocation strategies in individual invasive plants.
  • It considers the impact of natural enemies (herbivores) on individual plant competition and group dynamics.

Main Results:

  • Individual plant performance is maximized by competing for resources, while group success in monoculture is maximized by limiting competition.
  • Biocontrol agents, by reducing individual plant dominance, may inadvertently decrease competition, thus enhancing the performance of invasive plant groups.

Conclusions:

  • Biocontrol failures may arise from overlooking the trade-off between individual plant performance and group success.
  • Biocontrol strategies should consider how agents affect plant competition and overall invasive monoculture performance to improve efficacy.