|Panbiogeographic methods||Return to panbiogeography page|
Panbigoeography provides spatial techniques of biogeographic analysis. The principal conceptual tools are the track, node, baseline, and main massing. There are a substantial number of publications where panbiogeographic methodology is described and explored. Craw et al (1999) provide an overview of methods applied up to that time. Subsequent efforts have focused on providing further algorthims for combining individual tracks into generalized (standard) tracks. This page will, therefore, present only a brief illustration of the principal descriptive steps in track construction.
The following example of track construction presents geographic and taxonomic information for scopion species in the genus Opisthacanthus. The information is derived from distribution data provided by Lourenço (1995). The genus comprises 6 species, with five in the New World and one in the Old (West Africa). The species (and graphic symbols used in the track analysis) are:
Opisthacanthus lepturus (red square)
The following track illustration will begin first with the New World members.
Identify baseline (solid square) with respect to major tectonic feature crossed by the track
The following biogeographic information is derived from this example:
1.The spatial geometry of the distribution.