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Species Composition and within Archipelago Co-Occurrence Patterns in the Canary Islands

José María Fernández-Palacios and Christian Andersson
Ecography
Vol. 16, No. 1 (Jan. - Mar., 1993), pp. 31-36
Published by: Wiley on behalf of Nordic Society Oikos
Stable URL: http://www.jstor.org/stable/3683305
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Species Composition and within Archipelago Co-Occurrence Patterns in the Canary Islands
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Abstract

The distribution of trees and shrubs, ferns, land birds, beetles, and butterflies on the Canary Islands were analysed according to the null hypothesis approach. Deviations from the expected number of species were found in the species groups trees and shrubs and Tenebrionid beetles. This was interpreted as the result of deterministic processes influencing the colonisation of the archipelago. In an other analysis the relationship between species similarity and geographical distance between the islands was investigated. It showed that species similarity between the island decreased with distance. The decrease was steepest for Tenebrionid beetles and trees and shrubs so it was concluded that their dispersal ability was lower than in the other species groups.

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