Conspecific negative density dependence and why its study should not be abandoned

Joseph A. LaManna, Scott A. Mangan, Jonathan A. Myers

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Recent studies showing bias in the measurement of density dependence have the potential to sow confusion in the field of ecology. We provide clarity by elucidating key conceptual and statistical errors with null-model approaches used in recent studies of density dependence. Importantly, we show that neither a relabeling null model nor a more biologically appropriate null model reproduces differences in density-dependent recruitment between tropical and temperate forests, indicating that the latitudinal gradient in negative density dependence is not an artifact of statistical bias. We also suggest a path forward that combines observational comparisons of density dependence in multiple fitness components across localities with mechanistic and geographically replicated experiments.

Original languageEnglish
Article numbere03322
JournalEcosphere
Volume12
Issue number1
DOIs
StatePublished - Jan 2021

Keywords

  • community ecology
  • density dependence
  • dispersal
  • forest ecology
  • Janzen–Connell hypothesis
  • natural enemies
  • null models
  • spatial distribution
  • species interactions

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