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Area of Science:

  • Ecology
  • Network Science
  • Animal Behaviour

Background:

  • Population density influences animal social and spatial networks.
  • Understanding individual network positions in relation to density is crucial for predicting density-dependent processes.

Purpose of the Study:

  • To investigate how local population density affects individual network centrality in wild animal populations.
  • To determine if density-dependent network changes differ between spatial and social connections.

Main Methods:

  • Analyzed 36 datasets covering spatial and social behavior of over 58,000 individuals across 30 species.
  • Quantified relationships between local density and network centrality across diverse taxa.

Main Results:

  • 80% of systems showed positive density-network centrality relationships.
  • Most relationships (>80%) were nonlinear and saturated at higher densities (75%).
  • Spatial networks showed stronger, less saturating density effects than social networks.

Conclusions:

  • Density fundamentally shapes individual network positions in wild animals.
  • Saturating trends suggest counteracting demographic and behavioral mechanisms.
  • Spatial connections are more density-dependent than social ones, impacting ecological processes.