On the role of assumptions in cladistic biogeographical analyses
Keywords:Assumption 2, Brooks Parsimony Analysis, Cladistic Biogeography, Component Analysis, Vicariance
AbstractThe biogeographical Assumptions 0, 1, and 2 (respectively A0, A1 and A2) are theoretical terms used to interpret and resolve incongruence in order to find general areagrams. The aim of this paper is to suggest the use of A2 instead of A0 and A1 in solving uncertainties during cladistic biogeographical analyses. In a theoretical example, using Component Analysis and Primary Brooks Parsimony Analysis (primary BPA), A2 allows for the reconstruction of the true sequence of disjunction events within a hypothetical scenario, while A0 adds spurious area relationships. A0, A1 and A2 are interpretations of the relationships between areas, not between taxa. Since area relationships are not equivalent to cladistic relationships, it is inappropriate to use the distributional information of taxa to resolve ambiguous patterns in areagrams, as A0 does. Although ambiguity in areagrams is virtually impossible to explain, A2 is better and more neutral than any other biogeographical assumption.
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How to Cite
Santos, C. M. D. dos. (2011). On the role of assumptions in cladistic biogeographical analyses . Papéis Avulsos De Zoologia, 51(19), 295-306. https://doi.org/10.1590/S0031-10492011001900001
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