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Large-scale energetic and landscape factors of vegetation diversity

Authors

  • Sergey Venevsky,

    Corresponding author
    1. Laboratory of Mathematical Ecology, Obukhov Institute of Atmospheric Physics, Moscow, Russia
      E-mail: sergey@pik-potsdam.de
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  • Irina Veneskaia

    1. Potsdam Institute for Climate Impact Research, Potsdam, Germany
    2. Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany
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E-mail: sergey@pik-potsdam.de

Abstract

We show that at large scale the species number of vascular plants can be predicted to a major extent by climatically determined latent heat for evaporation and geometrical structure of landscape, described as an altitudinal difference. Application of the energy-equivalence rule across plant communities for transpiration per area unit, and use of fractal theory for the description of habitat occupation by vegetation results in a physically based species–energy relationship. Application of averaged global constants in the relationship results in a species–area equation with known parameters. Despite its simple form, this species–energy relationship generally reproduces global patterns of vegetation diversity at two scales – 10 000 and 100 000 km2– and is applicable for different regions across scales from 100 to million km2. The proposed theory produces more robust results compared with the correlated-based approaches, which link plant diversity patterns with climate variables, and allows the inclusion of an evolutionary component. The final climate-richness equation for vascular plants has a simple and consistent analytical form and requires easily measurable variables.

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