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Propagule pressure increase and phylogenetic diversity decrease community's susceptibility to invasion.

T Ketola1, K Saarinen2, L Lindström2

  • 1Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyvaskyla, P.O. Box 35, 40014, Jyvaskyla, Finland. tketola@jyu.fi.

BMC Ecology
|April 13, 2017
PubMed
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Invasive species success depends on both the invader and the resident community. Greater phylogenetic distance between invaders and residents reduces invasion probability, while higher propagule pressure increases it.

Area of Science:

  • Ecology
  • Microbial Ecology
  • Evolutionary Biology

Background:

  • Invasive species pose a significant threat to native biodiversity.
  • Understanding factors that determine invasion success is crucial for ecological management.
  • The roles of invader-resident community relatedness and propagule pressure remain incompletely understood.

Purpose of the Study:

  • To experimentally investigate how phylogenetic relationships and propagule pressure influence invasion probability.
  • To determine the impact of invader-resident phylogenetic distance on invasion success in microbial communities.

Main Methods:

  • Utilized 10 distinct three-species bacterial communities for experimental invasions.
  • Manipulated phylogenetic distances between invading and resident species.
Keywords:
BacteriaCompetitionInvasionPhylogenetic distancePhylogenetic similarity and propagule pressure

Related Experiment Videos

  • Varied propagule pressure to assess its effect on invasion outcomes.

    • Main Results:

    • Increased phylogenetic diversity between resident community members and the invader correlated with lower invasion success.
    • Higher propagule pressure significantly increased the probability of successful invasion.
    • Phylogenetic diversity had no discernible effect on invasion success in later stages; community identity became more influential.

    Conclusions:

    • Invasion success is a complex interplay between propagule pressure and the intrinsic properties of both the invader and the resident community.
    • Phylogenetic relatedness is a key factor influencing the early stages of ecological invasions.
    • Community composition and invader traits jointly shape the outcome of biological invasions.