The complete phylogeny of Pseudobulweria, the most endangered seabird genus: systematics, species status and conservation implications |
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Authors: | Benoit Gangloff Hadoram Shirihai Dick Watling Corinne Cruaud Arnaud Couloux Annie Tillier Eric Pasquet Vincent Bretagnolle |
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Institution: | (1) Centre d’Etudes Biologiques de Chiz?, CNRS UPR 1934, 79360 Villiers en Bois, France;(2) c/o Ausserdorfstra?e 6, 8052 Zurich, Switzerland;(3) NatureFiji-MareqetiViti, Box 2041, Government Buildings, Suva, Fiji. 259 Prince’s Road, Tamavua, Suva, Fiji;(4) G?noscope. Centre National de S?quen?age, 2, rue Gaston Cr?mieux, CP5706, 91057 Evry Cedex, France;(5) D?partement Syst?matique et Evolution, Museum National d’Histoire Naturelle, UMR7205 Origine, Structure et Evolution de la Biodiversit?, 55 rue Buffon, Paris, France |
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Abstract: | Pseudobulweria is one of the least known and most endangered of all seabird genera. It comprises six taxa, of which two are extinct, three
are critically endangered and one is near threatened. Phylogenetic relationships between these taxa and position of the genus
in the Order Procellariiformes have never been studied, and the taxonomic status of several taxa remains unsettled. Conservation
management of Pseudobulweria taxa will be enhanced if these uncertainties are resolved. We used a multilocus gene tree approach with two mitochondrial
DNA markers (cytochrome oxidase subunit 1 and cytochrome b gene) and one nuclear intron (β Fibrinogen intron 7) to investigate phylogenetic relationships within the genus using sequences
from all taxa. We combined gene trees to estimate a phylogeny of the genus using a multispecies coalescent methodology. We
confirmed the link between Pseudobulweria and a clade comprising Puffinus and Bulweria genera. The Fiji petrel’s status, as belonging to the genus, is confirmed, as is the specific status of newly rediscovered
Beck’s petrel. Maintenance of the two sub-species of Tahiti petrel as currently described is not supported. Discovering the
breeding grounds of all taxa is the key for their conservation, which is vital to both the marine and fragile insular tropical
ecosystems where Pseudobulweria are apical predators. |
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