Vicariant speciation due to 1.55 Ma isolation of the<scp>R</scp>yukyu islands,<scp>J</scp>apan, based on geological and<scp>G</scp>en<scp>B</scp>ank data

Osozawa, Soichi; 蘇, 智慧; Oba, Yuichi; Yagi, Takashi; Watanabe, Yasushi; Wakabayashi, John

doi:10.1111/ens.12037

Cited by 24 publications

(24 citation statements)

References 21 publications

(55 reference statements)

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“…Phylogenetic reconstruction of insects also provided an implication for the timing of the isolation of the islands as in the form of group. It is estimated that Amami-Okinawa, Yaeyama and Taiwan were likely to be branched simultaneously around 1.55 Ma (Osozawa et al 2013). Although the detailed context of events and their localities may still require further investigations, the ongoing tectonics in the Okinawa Trough can be well understood within the framework of a developing Quaternary back-arc basin.…”

Section: Origin and Evolutionmentioning

confidence: 99%

Hydrothermal Activity in the Okinawa Trough Back-Arc Basin: Geological Background and Hydrothermal Mineralization

Ishibashi

Ikegami

Tsuji

et al. 2014

Subseafloor Biosphere Linked to Hydrothermal Systems

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The Okinawa Trough is a back-arc basin behind the Ryukyu trench-arc system and located along the eastern margin of the Eurasian continent. Sulfide and sulfate mineralization associated with hydrothermal activity has been recognized in ten hydrothermal fields in the Okinawa Trough. Hydrothermal mineralization recognized in these fields is commonly represented by coexisting occurrence of zinc-and lead-enriched polymetallic sulfides and abundant sulfate minerals. The mineralogy and geochemical signatures present has led researchers to suggest these areas may be a modern analogue for the formation of ancient Kuroko-type volcanogenic massive sulfide (VMS) deposits. Recent seafloor drilling during IODP (Integrated Ocean Drilling Program) Expedition 331 documented the subseafloor structure of a hydrothermal system at the Iheya North Knoll. Mineral textures and hydrothermal assemblages present in the drilled cores obtained from a hydrothermal mound in the proximal area are consistent with Kuroko-type mineralization. Based on geochemical studies, the intra-field diversity of mineralization commonly recognized in the Okinawa Trough can be explained by subseafloor phase separation of the hydrothermal fluid, which reflects shallow water depth (from 700 to 1,600 m). The subseafloor phase separation may. play an important role to accumulate metal elements beneath the seafloor. Based on geophysical and geological studies, the Okinawa Trough is considered a back-arc basin in the rifting stage. Such a tectonic setting is characterized by development of normal faulting in brittle continental crust and frequent intrusion of a magma, which can be expected to provide favorable environment for development of a hydrothermal system Keywords

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Section: Origin and Evolutionmentioning

confidence: 99%

Hydrothermal Activity in the Okinawa Trough Back-Arc Basin: Geological Background and Hydrothermal Mineralization

Ishibashi

Ikegami

Tsuji

et al. 2014

Subseafloor Biosphere Linked to Hydrothermal Systems

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“…1), could not affect genetic structure of T. stimpsonii, although many studies have reported that faunal or genetic similarities are distinctively small between the northern and southern areas of the Tokara Gap (e.g., Ota, 1998;Osozawa et al, 2013). Results of demographic analyses (Tajima's D, Fu's Fs, and mismatch distribution) for Lineages 1-main, 1-sub, and 2 suggested that populations of these lineages have experienced sudden expansions.…”

Section: Genetic Diversity and Distributional History Of T Stimpsoniimentioning

confidence: 94%

“…Studies on vertebrates and insects with flying ability have revealed that the geological events in the Pleistocene drove speciation and/or intraspecific diversification of animals (e.g., Motokawa, 2000;Ota, 2000a;Osozawa et al, 2013). However, an ancestor of Diplothrix legata, a rodent endemic to Okinawajima, Tokunoshima and Amamioshima Islands of the Central Ryukyus, is estimated to have separated from allied lineages at the beginning of the Pleistocene, while the divergence time of the genus Tokudaia (an endemic rodent to these islands) is postulated to be rather earlier, 14-40 Mya (Suzuki et al, 2000).…”

Section: Diversification Of T Stimpsonii and T Crucifer Between Thementioning

confidence: 99%

“…Moreover, the Yonaguni Gap that is located between Yonagunijima Island and Taiwan was also formed during this period, although Ota (1998) argued that Yonagunijima Island was connected to Taiwan in the Ionian (middle) Pleistocene. Osozawa et al (2013), reviewing DNA sequence data of four insect taxa, which included endemic species in the Ryukyu Archipelago, revealed that the main genetic divergences of butterflies (Pailio and Parides) and dragonfly (Anotogaster) fit the geological model of Osozawa et al (2012). In contrast, some species of the firefly genus Pyrocoelia, whose females have little migratory ability, show unexpectedly large genetic differences, and their separation is too old to be explained by the geological model of Osozawa et al (2012) based on the estimated divergence times.…”

Section: Introductionmentioning

confidence: 99%

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Phylogeographic Study of Whip Scorpions (Chelicerata: Arachnida: Thelyphonida) in Japan and Taiwan

Karasawa

Nagata²,

Aoki³

et al. 2015

Zoological Science

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Whip scorpions (Thelyphonida), comprising an order in the class Arachnida, are distributed from tropical to temperate zones. Two species occur exclusively in Japan and Taiwan, but the border of their distributional ranges is ambiguous in the Central Ryukyus (Japan). We collected new specimens from the Central Ryukyus and revealed that the border of distribution of the two species lies between the Central and Southern Ryukyus, i.e., the Kerama Gap. Moreover, the estimated divergence time (15.8 Mya) of the two species, based on the mitochondrial COI gene, was older than the recently estimated time (1.55 Mya) of formation of the Kerama Gap. These results highlight the risks of a priori assumption solely on the basis of geological data for applying it as a calibration point to some terrestrial animals in this region. Typopeltis stimpsonii was genetically divided into four lineages, two of which turned out to be endemic to the Okinawa Islands. All specimens from the main island of Japan and Shikoku were in one lineage, which was also found in the Amami Islands and Hachijojima Island. This suggests that these specimens may have been dispersed by human activity. Typopeltis crucifer included five genetic lineages. Species collected from Ishigakijima and Iriomotejima Islands were genetically diversified not between the borders of these islands but within Ishigakijima Island. This study also suggests that phylogenetic diversity of the species in the Southern Ryukyus have increased through two times of invasions from Taiwan.

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“…Osozawa et al . () showed evidence for allopatric speciation of Ryukyu Pyrocoelia using GenBank/DDBJ data, and used 1.55 Ma as the calibration point. However, the sequence data comprised c .…”

Section: Introductionmentioning

confidence: 99%

Vicariance ofPyrocoeliafireflies (Coleoptera: Lampyridae) in the Ryukyu islands, Japan

Osozawa

Oba

Kwon

et al. 2015

Biol. J. Linn. Soc.

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We performed molecular phylogenetic analyses based on the mitochondrial COI gene (687 bp) and the nuclear 28S rRNA gene (715 bp) and reconstructed phylogenetic trees of the Pyrocoelia fireflies in the Ryukyu Islands and eastern Asia. Age calibration was done using a robust geological constraint: the Okinawa trough and associated straits began to rift at 1.55 Ma, isolating the Ryukyu Islands from the Chinese continent, Japanese islands, Taiwan island and some of the islands from each other. We suggest that the physical isolation of these islands began to generate the allopatric speciation within these islands, so the timing of this isolation was assigned to an appropriate node. The topology is completely concordant among phylogenetic trees reconstructed using MEGA (maximum-likelihood), raxmlGUI (maximum-likelihood) and BEAST (Bayesian inference; including combined analysis of COI and 28S rRNA genes). Two lineages are recognized, related to their emergence time; spring to summer, and autumn. In each lineage, vicariance is inferred to have begun at 1.55 Ma from our phylogenetic and geological analyses. In lineage 1, P. oshimana (Amami), P. matsumurai (Okinawa), P. discicollis (W. Japan), P. fumosa (E. Japan) and P. abdominalis (Yaeyama) were differentiated. In lineage 2, P. rufa (Tsushima and Korea), P. miyako (Miyako-jima), P. atripennis (Ishigaki-jima) and P. praetexta (Taiwan and HongKong) were differentiated. Pyrocoelia analis (Taiwan and China) emerges throughout the year except for winter, and constitutes another lineage. We suggest that Pyrocoelia fireflies differentiated at 2 Ma to generate these three lineages. The base substitution rate for the COI gene is estimated as 4.48% Myr -1 and that for the 28S rRNA gene is 0.394% Myr -1 , and these rates were used in a combined BEAty analysis in BEAST.

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Vicariant speciation due to 1.55 Ma isolation of theRyukyu islands,Japan, based on geological andGenBank data

Cited by 24 publications

References 21 publications

Hydrothermal Activity in the Okinawa Trough Back-Arc Basin: Geological Background and Hydrothermal Mineralization

Hydrothermal Activity in the Okinawa Trough Back-Arc Basin: Geological Background and Hydrothermal Mineralization

Phylogeographic Study of Whip Scorpions (Chelicerata: Arachnida: Thelyphonida) in Japan and Taiwan

Vicariance ofPyrocoeliafireflies (Coleoptera: Lampyridae) in the Ryukyu islands, Japan

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