Phylogenetic analyses of Lapita decoration do not support branching evolution or regional population structure during colonization of Remote Oceania |
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Authors: | Cochrane Ethan E Lipo Carl P |
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Institution: | International Archaeological Research Institute, 2081 Young Street, Honolulu, HI 96826, USA. ecochrane@iarii.org |
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Abstract: | Intricately decorated Lapita pottery (3100-2700 BP) was made and deposited by the prehistoric colonizers of Pacific islands, east of the main Solomon's chain. For decades, analyses of this pottery have focused on the ancestor-descendant relationships of populations and the relative degree of interaction across the region to explain similarities in Lapita decoration. Cladistic analyses, increasingly used to examine the evolutionary relationships of material culture assemblages, have not been conducted on Lapita artefacts. Here, we present the first cladistic analysis of Lapita pottery and note the difficulties in using cladistics to investigate datasets where a high degree of horizontal transmission and non-branching evolution may explain observed variation. We additionally present NeighborNet and phenetic distance network analyses to generate hypotheses that may account for Lapita decorative similarity. |
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Keywords: | networks cladistics Lapita Oceania pottery |
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