Get access

The species–area relationship derived from species-specific incidence functions

Authors

  • Otso Ovaskainen,

    Corresponding author
    1. Metapopulation Research Group, Department of Ecology and Systematics, University of Helsinki, PO Box 65, Viikinkaari I, FIN-00014 Helsinki, Finland
      * E-mail: otso.ovaskainen@helsinki.fi
    Search for more papers by this author
  • Ilkka Hanski

    1. Metapopulation Research Group, Department of Ecology and Systematics, University of Helsinki, PO Box 65, Viikinkaari I, FIN-00014 Helsinki, Finland
    Search for more papers by this author

* E-mail: otso.ovaskainen@helsinki.fi

Abstract

The species–area relationship (SAR), describing the increase in species number (S) with increasing area (A), is one of the most robust patterns in ecology with great significance for conservation. The SAR is generally formulated as a power function, S = kAz, although the semilogarithmic form S = a + b log A has often been used by botanists. Here we unite the two forms by deriving SARs from the incidence functions of the species that make up the community. We show how the decisive scaling parameters z and b relate to the properties of individual species, and highlight why the biological interpretation of SARs has been so enigmatic.

Get access to the full text of this article

Ancillary