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Effects of Behavioural Strategy on the Exploitative Competition Dynamics.

Doanh Nguyen-Ngoc1,2, Thuy Nguyen-Phuong3

  • 1Faculty of Computer Science and Engineering, Thuyloi University, No 175, Tay Son Street, Hanoi, Vietnam.

Acta Biotheoretica
|October 23, 2016
PubMed
Summary

The aggressive strategy by the locally inferior resource exploiter (LIE) ensures its survival and can lead to the extinction of the locally superior resource exploiter (LSE). This outcome holds true regardless of resource type.

Keywords:
Abiotic resourceAggregation of variablesBehavioural strategyBiotic resourceExploitative competitionInterference competitionMigrationTime scales

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Area of Science:

  • Ecology
  • Population Dynamics
  • Theoretical Biology

Background:

  • Investigates interspecies competition for shared resources.
  • Considers both abiotic and biotic resource systems.
  • Focuses on asymmetric competition dynamics between two species.

Purpose of the Study:

  • To model and analyze the competitive strategies of a locally inferior resource exploiter (LIE) against a locally superior resource exploiter (LSE).
  • To determine the effectiveness of LIE's 'avoiding' versus 'aggressive' strategies in a common resource system.
  • To assess the impact of these strategies on species survival and potential extinction.

Main Methods:

  • Developed mathematical models for two species competing for a common resource.
  • Incorporated abiotic (constant supply) and biotic (reproducing) resource models.
  • Modeled interference competition with LIE employing avoiding or aggressive strategies.
  • Assumed fast migration dynamics between competition and non-competition patches.

Main Results:

  • The aggressive strategy by the LIE is effective for its survival.
  • The LIE's aggressive strategy can lead to the global extinction of the LSE.
  • The outcome of the aggressive strategy is independent of the resource's nature (abiotic or biotic).

Conclusions:

  • An aggressive competitive strategy can be a highly effective survival tactic for a weaker competitor.
  • Interference competition, specifically aggression, can drastically alter species dominance and lead to extinction.
  • The study highlights the significant role of behavioral strategies in ecological competition outcomes.