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Climatic warming destabilizes forest ant communities.

Sarah E Diamond1, Lauren M Nichols2, Shannon L Pelini3

  • 1Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA.

Science Advances
|November 8, 2016
PubMed
Summary
This summary is machine-generated.

Climate warming impacts forest ant communities by increasing nest occupancy and decreasing abandonment. However, this leads to reduced community stability and increased fragility in future climates.

Keywords:
Climate changeantscommunity ecologydynamical stabilityexperimental warmingforestspecies interactionstemperature

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Area of Science:

  • Ecology
  • Climate Change Biology
  • Community Ecology

Background:

  • Climate warming directly affects species and indirectly alters species interactions, impacting ecological communities.
  • Understanding the dynamics of community change under warming is crucial but remains poorly understood.

Purpose of the Study:

  • To investigate the cumulative effects of warming on forest ant community dynamics and turnover.
  • To assess how climate manipulation experiments influence community stability.

Main Methods:

  • A 5-year climate manipulation experiment involving warming of forest ant communities at two sites.
  • Analysis of nest occupancy, extinction, and abandonment rates.
  • Calculation of dynamical (Lyapunov) community stability within and between sites.

Main Results:

  • Warming consistently increased nest occupancy and decreased nest extinction and abandonment.
  • A subset of thermophilic species drove these responses, persisting longer in nests.
  • Dynamical community stability decreased with warming, both within and between sites.

Conclusions:

  • Warming-induced persistence of thermophilic species diminishes community turnover and alters species interactions.
  • Reduced community stability under warming contrasts with previous findings on interaction resilience.
  • Future, warmer climates may lead to increasingly fragile and unstable ecological communities.