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Related Experiment Videos

Quantifying phylogenetically structured environmental variation.

Yves Desdevises1, Pierre Legendre, Lamia Azouzi

  • 1Laboratoire Arago, Université Pierre et Marie Curie, UMR CNRS 7628, BP 44, 66651 Banyuls-sur-Mer Cedex, France. desdevises@obs-banyuls.fr

Evolution; International Journal of Organic Evolution
|December 23, 2003
PubMed
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Phylogenetic niche conservatism, the link between traits and environment, is quantified by a new method. This approach reveals that mammal body mass and population density are interconnected through shared evolutionary and ecological factors.

Area of Science:

  • Evolutionary biology
  • Ecology
  • Comparative genomics

Background:

  • Phylogenetic comparative methods are crucial for distinguishing trait variation due to evolutionary history from that due to current ecological factors.
  • Phylogenetic niche conservatism describes the portion of trait variation linked to both phylogeny and ecology.
  • Quantifying this shared influence is essential for understanding trait evolution in response to environmental pressures.

Purpose of the Study:

  • To introduce a novel variation partitioning method for quantifying phylogenetically structured environmental variation.
  • To apply this method to investigate the relationship between body mass and population density in mammals within a phylogenetic context.

Main Methods:

  • Development of a new statistical method for variation partitioning.

Related Experiment Videos

  • Application of the method to a dataset of 79 mammal species, analyzing body mass and population density.
  • Phylogenetic framework used to control for evolutionary relatedness.

    • Main Results:

    • The proposed method successfully quantifies the phylogenetically structured environmental variation.
    • A significant portion of the variation in mammal body mass is explained by the combined influence of phylogeny and population density.
    • Evidence supports the role of phylogenetic niche conservatism in shaping mammal traits.

    Conclusions:

    • The new method provides a valuable tool for dissecting trait variation in evolutionary and ecological studies.
    • Phylogeny and population density are key interacting factors influencing mammal body mass.
    • Understanding phylogenetically structured environmental variation is critical for accurate ecological and evolutionary interpretations.