Late Miocene and Pliocene Ostracoda from the Shimajiri Group, Kume-jima Island, Japan: Biogeographical significance of the timing of the formation of back-arc basin (Okinawa Trough)

Tanaka, Gengo; Nomura, Shinpei

doi:10.1016/j.palaeo.2009.02.023

Cited by 20 publications

(3 citation statements)

References 26 publications

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“…Thereafter, with the region around the Qiongzhou Strait rising to 40 m below the present sea level in the late early‐Pleistocene (Yao, ), the deep trough in the Qiongzhou Strait may have been isolated from the SCS during the ice ages by the emergence of the Qiongzhou Strait landmass. After its reopening and large‐scale depression in the early (<1 Ma) and middle Pleistocene (<0.7 Ma), the Okinawa Trough of the ECS rifted and subsided along its full length (Kimura, ; Tanaka & Nomura, ). The seawater flowed into the northern part of the ECS and the entire Yellow Sea.…”

Section: Introductionmentioning

confidence: 99%

Cryptic diversity of marine gastropod Monodonta labio (Trochidae): did the early Pleistocene glacial isolation and sea surface temperature gradient jointly drive diversification of sister species and/or subspecies in the Northwestern Pacific?

Zhao

Kong

et al. 2017

Marine Ecology

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Formation of glacial refugia during the Pleistocene climatic oscillations has been put forward to elucidate the diversification of marine organisms in the north‐western Pacific. The marine gastropod Monodonta labio is one of the most common species in the Northwestern Pacific and possibly possesses cryptic diversity. Here, we investigate the phylogeographic pattern of this species to test the potential mechanisms driving its diversification in the Northwestern Pacific. Genetic information for two mitochondrial genes (Cytochrome oxidase subunit I and 16S rDNA) and one nuclear gene (internal transcribed spacer 1) was acquired to detect genetic structuring and to reconstruct the gastropod's phylogenetic history. Our results revealed that M. labio is comprised of five main clades, and divergence time estimates place their cladogenesis as corresponding to the initiation (c. 2.5 mya) and intensification (c. 0.9 mya) of large‐scale Northern Hemisphere ice sheets. The early and middle Pleistocene divergence times are consistent with the emergence times of the Dongshan land bridge, which would seperate the ancient East China Sea and the ancient South China Sea forming two potential refugia. In addition, the deep trough in the Qiongzhou Strait would possibly act as another potential refugium with the uplift of the Qiongzhou Strait at mid‐Pleistocene. This study suggests that the current genetic architecture of M. labio is probably correlated with glacial isolation and sea surface temperature gradient. We also put forward the possibility that these factors were probably an important driver for the diversification of sister species or subspecies of other taxa in the Northwestern Pacific.

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Section: Introductionmentioning

confidence: 99%

Cryptic diversity of marine gastropod Monodonta labio (Trochidae): did the early Pleistocene glacial isolation and sea surface temperature gradient jointly drive diversification of sister species and/or subspecies in the Northwestern Pacific?

Zhao

Kong

et al. 2017

Marine Ecology

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“…We used the microfossil ostracode fauna and the modern analog technique (MAT) transfer function to estimate water depths and RSLs. Previous studies, that subjected fossil ostracode data to MAT, estimated paleo‐water depth quantitatively (e.g., Iwatani et al, 2012; Tanaka & Nomura, 2009). Then, we subtracted RSLs based on the glacio‐hydro isostatic adjustment (GIA) model of Okuno et al (2014) from the estimated RSLs to calculate the rates of vertical tectonic crustal movement around Shikoku Island and infer crustal deformation during the middle Holocene.…”

Section: Introductionmentioning

confidence: 99%

Middle Holocene relative sea‐level changes and vertical tectonic crustal movements on Shikoku Island near the Nankai Trough, Japan

et al. 2022

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The Philippine Sea plate subducts beneath the Eurasia plate at the Nankai Trough, northwestern Pacific, causing crustal deformation, mega‐thrust earthquakes, and tsunami events. Shikoku Island, 150 km northwest of the trough, experiences both coseismic and interseismic deformation. Coastal sediments potentially record vertical crustal movements as relative sea level (RSL) changes. We studied sedimentary facies and microfossil ostracodes in core SKM from southwestern Shikoku Island for evidence of middle Holocene tsunami events and deformation. The core sediments included nine event layers corresponding to storm or tsunami events. Using modern analog techniques, we estimated RSLs from the ostracode assemblages of core SKM and 13 other cores from Shikoku Island and the surrounding region. Then, we subtracted RSL changes due to glacio‐hydro isostatic adjustment from the estimated RSLs to estimate vertical tectonic movement rates in these cores between 8.6 and 4.7 ka. The inferred RSL changes suggest that the Sukumo site has experienced both uplift and subsidence since 8.6 ka. Before 6.6 ka, rates of tectonic crustal movement were higher than the modern‐day rate, and its spatial distribution also differed. After 6.6 ka, tectonic crustal movement showed a similar spatial pattern and occurred at rates close to the modern day interseismic rate. The spatial pattern and rates of tectonic crustal movement could be caused by changes in rupture areas between the Eurasia and the Philippine Sea plates beneath the Shikoku Island and in stress condition of the asthenosphere. Some of the vertical displacements can be explained by the movements of local active faults.

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“…To clarify the biogeographical relationships among ostracod fauna, we compared the Holocene ostracod assemblages from the Co To Islands with assemblages from adjacent areas ( Table 3). The areas and studies from which we extracted information were as follows: Australia (Hartmann, 1981;Howe and McKenzie, 1989;Warne et al, 2006), Strait of Malacca Zhao, 1987a, 1988;Yamada et al, 2014), Sunda Shelf (Zhao and Whatley, 1989;Mostafawi, 1992), southern China (Cai, 1982(Cai, , 1988Zheng, 1994;Hu and Tao, 2008), East China Sea (Zhao, 1984;Wang et al, 1988;Zhao and Wang, 1988;Tabuki and Nohara, 1990;Hu and Tao, 2008), and Japan (Tanaka et al, 1998;Irizuki et al, 2008;Tanaka, 2008). To reveal the similarity of ostracod assemblages in northeastern Vietnam, we calculated the value of the Jaccard similarity coefficient in terms of species (J s ) and genera (J g ) between the Co To Islands and the northeastern coast of Vietnam (Fig.…”

Section: Methodsmentioning

confidence: 99%

Holocene ostracod assemblages from the Co To Islands, northeastern Vietnam

Niiyama

Tanaka

Komatsu

et al. 2019

J. Micropalaeontol.

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Abstract. In this study, we investigated ostracod assemblages from the Co To Islands in northeastern Vietnam. We identified 77 ostracod species belonging to 46 genera in nine surface sediment samples and recognized three biofacies (I, II, and III) based on Q-mode cluster analysis. The dominant species of biofacies I and II were Aurila hataii, Loxoconcha japonica, and Xestoleberis hanaii, which commonly occur in seaweed beds from southern China to Japan. This is the first report on the ostracod assemblage from the open-sea area in northeastern Vietnam. We clarified that the ostracod assemblages in the Gulf of Tongking, including northern Vietnam, have a strong biogeographical relationship with East Asia seas. A new species, Loxoconcha cotoensis sp. nov., was described herein from the Co To Islands (http://www.zoobank.org/NomenclaturalActs/41d3fb9f-ae17-4215-82c1-0874a8bf1a30, last access: 3 June 2019).

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Late Miocene and Pliocene Ostracoda from the Shimajiri Group, Kume-jima Island, Japan: Biogeographical significance of the timing of the formation of back-arc basin (Okinawa Trough)

Cited by 20 publications

References 26 publications

Cryptic diversity of marine gastropod Monodonta labio (Trochidae): did the early Pleistocene glacial isolation and sea surface temperature gradient jointly drive diversification of sister species and/or subspecies in the Northwestern Pacific?

Cryptic diversity of marine gastropod Monodonta labio (Trochidae): did the early Pleistocene glacial isolation and sea surface temperature gradient jointly drive diversification of sister species and/or subspecies in the Northwestern Pacific?

Middle Holocene relative sea‐level changes and vertical tectonic crustal movements on Shikoku Island near the Nankai Trough, Japan

Holocene ostracod assemblages from the Co To Islands, northeastern Vietnam

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