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Biotic resistance in marine environments.

David L Kimbro1, Brian S Cheng, Edwin D Grosholz

  • 1Marine Science Center, Northeastern University, Nahant, MA 01908, USA. d.kimbro@neu.edu

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|March 26, 2013
PubMed
Summary

Marine ecosystems show weaker resistance to invasive species compared to terrestrial ones, especially for producer invasions. Biotic resistance in marine environments is influenced by factors like latitude, habitat, and invader type.

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Area of Science:

  • Ecology
  • Marine Biology
  • Invasive Species Research

Background:

  • Biological invasions are influenced by the resistance of native communities.
  • Terrestrial studies show native producers and herbivores resist producer invasions, with competition strengthening with native producer diversity.

Purpose of the Study:

  • To test the generality of terrestrial findings in marine ecosystems through a meta-analysis.
  • To assess factors predicting marine biotic resistance beyond competition versus consumption mechanisms.

Main Methods:

  • Conducted a meta-analysis of marine experiments on biotic resistance.
  • Compared resistance mechanisms (competition vs. consumption) across trophic levels and ecosystems.
  • Utilized a model-selection approach to identify key predictors of marine biotic resistance.

Main Results:

  • Native marine producers resisted producer invasions weakly, requiring high native diversity, a weaker effect than in terrestrial systems.
  • Native consumers resisted invasive producers similarly in both marine and terrestrial systems.
  • Invasive consumers were more strongly resisted in marine systems than invasive producers.

Conclusions:

  • Marine biotic resistance is less dependent on native producer diversity compared to terrestrial systems.
  • Understanding marine biotic resistance requires considering latitude, habitat, and invader taxon, alongside resistance mechanisms.
  • This study provides a comprehensive understanding of factors influencing biological invasions in marine environments.