Genetic and Morphological Differences among Populations of the Japanese Bush-Warbler (Aves: Sylviidae) on the Ogasawara Islands, Northern Pacific

Emura, Naoko; Ando, Haruko; Kawakami, Kazuto; Isagi, Yuji

doi:10.2984/67.2.3

Cited by 12 publications

(13 citation statements)

References 17 publications

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“…Thus, mtDNA suggested possible Japanese origins of bush-warblers in Hawaii but was not informative to colonization history within the Hawaiian Islands because only a single haplotype was found in our Hawaiian samples. Similarly, ''black'' and ''white'' populations shared a single COI haplotype (GenBank accessions MF688616-MF688627), which was also found in C. diphone populations sampled in southern Japan (Honshu), as well as on surrounding islands other than the Ogasawara Islands (Emura et al 2013).…”

Section: Insight From Mtdnamentioning

confidence: 81%

“…Finally, to further investigate our finding of potentially 2 separate populations on each island, denoted by ''black'' or ''white'' genotypes in the STRUCTURE plot, we sequenced a 538-base pair (bp) region of mitochondrial cytochrome c oxidase subunit I (COI) according to the protocol of Emura et al (2013). From birds sampled across the islands, we used a subsample of individuals (n ¼ 7 black, n ¼ 5 white) with high Q values, indicating high probability of assignment to one of these groups.…”

Section: Genotyping and Locus Behaviormentioning

confidence: 99%

“…From birds sampled across the islands, we used a subsample of individuals (n ¼ 7 black, n ¼ 5 white) with high Q values, indicating high probability of assignment to one of these groups. This gene region exhibits variation within and among bush-warbler subspecies from island and mainland Japan (Emura et al 2013).…”

Section: Genotyping and Locus Behaviormentioning

confidence: 99%

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Population genetics of an island invasion by Japanese Bush-Warblers in Hawaii, USA

Foster

Walker

Rannals

et al. 2018

The Auk

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Section: Insight From Mtdnamentioning

confidence: 81%

Section: Genotyping and Locus Behaviormentioning

confidence: 99%

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Population genetics of an island invasion by Japanese Bush-Warblers in Hawaii, USA

Foster

Walker

Rannals

et al. 2018

The Auk

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“…On the Galapagos Islands, where endemic finches and hawks were genetically differentiated among islands (Bollmer et al, ; Petren et al, ), gene flow among islands approximately 100 km apart was detected for Galapagos dove Zenaida galapagoensis (Santiago‐Alarcon et al, ). In the case of native terrestrial birds on the Ogasawara Islands, brown‐eared bulbul Hypsipetes amaurotis and Japanese bush warbler Cettia diphone were genetically differentiated between two island groups (the Bonin and Volcano Islands), which are approximately 150 km from each other (Emura et al, ; Sugita et al, ). Genetic differentiation of the Bonin white‐eye Apalopteron familiare , endemic to the Bonin Islands, was detected even within Hahajima Island and among close satellite islands (3.6 and 5.5 km from Hahajima) (Kawakami, Harada, et al, ).…”

Section: Inter‐island Movement As An Issue Of Habitat Conservationmentioning

confidence: 99%

Genetic and ecological conservation issues for oceanic island birds, revealed by a combination of the latest molecular techniques and conventional field work

Ando

2019

Ecological Research

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Oceanic island ecosystems are vulnerable to artificial disturbances, and many island endemics are at risk of extinction. Conservation of island endemics is a high priority for reducing biodiversity loss, but fundamental studies on many species remain lacking due to the small population size and limited accessibility to island habitats. In this review, I explored conservation issues of endangered bird species in oceanic island habitat, which have been revealed by the latest molecular techniques with a combination of conventional field work. Recent genetic studies revealed low genetic diversity of endangered island endemics. Analyses of genetic structure have revealed the gene flow of endemic birds among islands according to their flying abilities. Seasonal inter-island movement of Columbiformes and some finches have been observed, which might be related to fluctuating food resource availability among island habitats. Dietary analyses based on DNA metabarcoding for Columba janthina nitens revealed frequent consumption of introduced plants by this bird. This review may provide a new perspective for conservation biology in oceanic island ecosystems. That is, (a) appropriate management of genetic diversity within and outside of habitat before serious population declines occur, (b) detection of meaningful evolutionarily significant units (ESUs) considering flying ability of birds among islands and management of total habitat range within each ESU and (c) introduced species eradication designed to not to cause a negative impact on endangered species that may depend on introduced species for their food.

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“…Because these observations were limited to areas around our camp site, it is unclear whether this bird increased within the entire island. The recently observed Japanese Bush Warbler may also be able to colonize, although it is not a native subspecies (morphological and genetic analysis classified it as C. d. cantans from the Japanese mainland; Emura et al 2013). By colonizing new habitats, species may restore lost ecosystems or act like unwanted pests, competing with native species, introducing diseases and parasites, or introgressive hybridization between related native species (Simberloff 1996, Wikelski et al 2004.…”

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confidence: 99%

Monitoring of Avifauna to Estimate the Effect of Ecological Restoration in Mukojima, Bonin Islands

Emura

Furuya²,

Ando

et al. 2015

Journal of the Yamashina Institute for Ornithology

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Abstract. Mukojima (Muko Island) of the Bonin Islands, Japan, has undergone multiple ecological changes as part of ecological restoration projects, such as the eradication of invasive species. However, the effect of these projects on the resident terrestrial birds of Mukojima are unknown. In this study, we performed censuses in two transects to record quantitative data of resident terrestrial bird species of Mukojima. In addition, all bird species observed from February to May 2008 2012 were also recorded. Only two species, the Blue Rock Thrush Monticola solitarius and the introduced Japanese White-eye Zosterops japonicus were regularly observed. There were no changes in abundance of either species between 2007 and the present study, except for an increase in the Blue Rock Thrush along one transect. We observed a total of 74 bird species, 32 of them newly recorded on Mukojima. Although preliminary, our results contribute to an understanding of the effects of ecological restoration on the avifauna of Mukojima.

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Genetic and Morphological Differences among Populations of the Japanese Bush-Warbler (Aves: Sylviidae) on the Ogasawara Islands, Northern Pacific

Cited by 12 publications

References 17 publications

Population genetics of an island invasion by Japanese Bush-Warblers in Hawaii, USA

Population genetics of an island invasion by Japanese Bush-Warblers in Hawaii, USA

Genetic and ecological conservation issues for oceanic island birds, revealed by a combination of the latest molecular techniques and conventional field work

Monitoring of Avifauna to Estimate the Effect of Ecological Restoration in Mukojima, Bonin Islands

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