Evaluating multiple criteria for species delimitation: an empirical example using Hawaiian palms (Arecaceae: Pritchardia).

BMC Evolutionary Biology
Christine D BaconWarren L Wagner

Abstract

Robust species delimitations are fundamental for conservation, evolutionary, and systematic studies, but they can be difficult to estimate, particularly in rapid and recent radiations. The consensus that species concepts aim to identify evolutionarily distinct lineages is clear, but the criteria used to distinguish evolutionary lineages differ based on the perceived importance of the various characteristics of evolving populations. We examined three different species-delimitation criteria (monophyly, absence of genetic intermediates, and diagnosability) to determine whether currently recognized species of Hawaiian Pritchardia are distinct lineages. Data from plastid and nuclear genes, microsatellite loci, and morphological characters resulted in various levels of lineage subdivision that were likely caused by differing evolutionary rates between data sources. Additionally, taxonomic entities may be confounded because of the effects of incomplete lineage sorting and/or gene flow. A coalescent species tree was largely congruent with the simultaneous analysis, consistent with the idea that incomplete lineage sorting did not mislead our results. Furthermore, gene flow among populations of sympatric lineages likely explains the admi...Continue Reading

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Citations

Oct 29, 2013·BMC Evolutionary Biology·Matthias MarkolfPeter M Kappeler
May 17, 2014·Ecology and Evolution·Xuli WangLili Huang
May 24, 2015·Molecular Phylogenetics and Evolution·Mark P Simmons, John Gatesy
Feb 13, 2016·Molecular Ecology·Adrienne B NicotraJustin O Borevitz

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Datasets Mentioned

BETA
JF904936
JF905438

Methods Mentioned

BETA
PCR

Software Mentioned

biopy
PAUP
MUSCLE
FlexiBin
FigTree
Microchecker
PeakScanner
jModeltest
Structure Harvester
LogCombiner

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