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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/30580

Title: COI Barcoding of the Shorebirds: Rates of Evolution and the Identification of Species
Authors: Elbourne, Rebecca
Advisor: Baker, Allan J.
Department: Ecology and Evolutionary Biology
Keywords: DNA barcoding
Charadriiformes
substitution rate
mitochondrial DNA
shorebirds
white-headed gulls
Lari
Scolopaci
subspecies
COI
Issue Date: 7-Dec-2011
Abstract: This study assembles COI barcodes from 1814 specimens from the shorebird order, Charadriiformes and examines variation relative to time, rate of evolution and taxonomic level. In the suborder Scolopaci, 95% of sampled species were identified correctly. COI barcode variation within monotypic species was low (0-1% maximum distance) but showed a wide range within polytypic species (0-5%). Preliminary Charadrii results suggest similar trends but success is reduced in the third suborder, Lari. Rates of COI evolution are found to be lowest in the Lari and this leads to reduced species identification in recently radiated families: just 49% of the Laridae and 57% of the Stercoraridae are identified but 100% of the older Alcidae. In the faster Scolopaci, subspecies are at the limit of resolution with some well differentiated subspecies not distinguished by barcodes. The interplay of evolutionary rates, divergence dates and gene flow appears to determine COI barcode differentiation between taxa.
URI: http://hdl.handle.net/1807/30580
Appears in Collections:Master

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