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Phylogenetic plant community structure along elevation is lineage specific.

Charlotte Ndiribe1, Loïc Pellissier2, Silvia Antonelli3

  • 1Department of Ecology and Evolution, University of Lausanne Biophore, 1015 Lausanne, Switzerland ; Swiss Institute of Bioinformatics Genopode, 1015 Lausanne, Switzerland.

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Ancient plant lineages show similar environmental preferences, while newer ones evolve distinct traits. This study reveals how evolutionary history shapes plant communities across elevation gradients.

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Community structureelevation gradientmountain plantsphylogenetic clusteringphylogenetic overdispersion.

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Phylogenetics

Background:

  • Community assembly patterns are influenced by evolutionary history and inherited traits.
  • Phylogenetic relatedness effects are well-studied within genera/families, but lineage-specific impacts on entire communities are less understood.
  • Understanding lineage-specific ecological processes is crucial for interpreting community structure.

Purpose of the Study:

  • To investigate how community phylogenetic structure varies across elevation gradients for different plant lineages.
  • To analyze ecological assembly trends at evolutionary tree nodes for individual lineages.
  • To disentangle lineage-specific patterns in community assembly and their ecological implications.

Main Methods:

  • Measured community phylogenetic structure across an elevation gradient for 35 plant families.
  • Utilized co-occurrence index and Net Relatedness Index (NRI).
  • Developed a framework to analyze each lineage separately, examining ecological assembly at tree nodes.

Main Results:

  • Observed prevalent phylogenetic clustering in older evolutionary nodes (ancient lineages).
  • Found phylogenetic overdispersion in more recent evolutionary nodes (newer lineages).
  • Indicated that older lineages retain environmental tolerances, while newer ones rapidly evolve distinct adaptations.

Conclusions:

  • Lineage-specific analyses are vital for understanding community assembly and the ecological role of traits.
  • Phylogenetic signal absence may be explained by disentangling lineage-specific patterns.
  • The study offers new perspectives on niche conservatism and trait evolution across diverse plant lineages.