A compilation of taxonomic (species and genus) counts for a wide array of organism groups for island and associated mainland locations. Taken from Simberloff (1970).
data("simberloff")A data frame with 204 observations on the following 12 variables.
LocationIsland and mainland location.
DesignationA factor with levels Island Mainland.
Hypothesized.sourceHypothesized mainland location for particular island location.
No.spp.The number of species
Obs.S.GObserved species/genus (S/G) ratio
E.S.G.Expected S/G ratio, based on random sampling from mainland pool of species.
prop..obs..cogenersThe proportion of observed cogeners, only reported for bird species.
prop..exp..cogenersThe proportion of expected cogeners based on random sampling from the associated mainland pool of species, only reported for bird species.
AuthoritySource of information for compilation.
Life.formA factor with levels Ants Land birds Passerine birds Vascular plants.
Notes.1Notes from Simberloff (1970)
Notes.2Additional notes from Simberloff (1970)