Published Papers - Fujita Kazuhiko

Biogeographical patterns of the porcelaneous larger foraminifer Alveolinella quoyi through the integration of fossil data

Davide Bassi, Yasufumi Iryu, Johannes Pignatti, Kazuhiko Fujita, Willem Renema

Geobios ( Elsevier BV )  85   1 - 9   2024.08 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Porcelaneous larger foraminiferal responses to Oligocene–Miocene global changes

Davide Bassi, Juan Carlos Braga, Johannes Pignatti, Kazuhiko Fujita, James H. Nebelsick, Willem Renema, Y. Iryu

Palaeogeography, Palaeoclimatology, Palaeoecology ( Elsevier BV )  634   111916 - 111916   2024.01 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Public symposium “Biogenic Reefs: Past and Future"

IRYU Yasufumi, ADACHI Natsuko, YAMAMOTO Kazuyuki, FUJITA Kazuhiko, ASAMI Ryuji, YAMANO Hiroya, TAKAYANAGI Hideko

Journal of the Japanese Coral Reef Society ( The Japanese Coral Reef Society )  26 ( 1 ) 59 - 80   2024 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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A new species of the larger porcelaneous foraminifer Borelis provides novel insights into Neogene to Recent western Pacific palaeobiogeographical dispersal patterns

Bassi, D; Iryu, Y; Kinoshita, S; Fujita, K; Pignatti, J

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY ( Palaeogeography, Palaeoclimatology, Palaeoecology )  628   2023.10 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Constant shell density of hyaline large benthic foraminifers under thermal stress

Shunichi Kinoshita, Azumi Kuroyanagi, Hodaka Kawahata, Kazuhiko Fujita, Toyoho Ishimura, Atsushi Suzuki, Harumasa Kano, Yoshimi Kubota, Hiroshi Nishi

Marine Micropaleontology   181   2023.05 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Recently, increased concentrations of anthropogenic atmospheric CO2 have caused ocean warming and acidification, leading to swift environmental alterations. In coral reef regions, bleaching and death of symbiotic calcifying organisms have been distressing. Generally, large benthic foraminifers (LBF), a principal symbiotic calcifying organisms in coral reefs, have gained popularity because thermal stress impedes their growth and ecological functions. Nevertheless, due to the complex nature of the shell structure, it is unclear whether indicators (shell volume, density, and size) influence the calcification rate. Micro X-ray computed tomography (MicroCT) has been efficiently used to study these parameters on porcelaneous LBF; however, hyaline LBF remained largely unexplored. In this research, reproducing populations of LBF Calcarina gaudichaudii were grown asexually under six varying temperatures (19 °C–29 °C). They were then determined using MicroCT. Shell weight and volume is reduced under high and low thermal stress with an optimal water temperature of 26 °C. However, the density of the shell was sustained at a continual level. These outcomes indicate that C. gaudichaudii can sustain a continual shell density given circumstances of growth inhibition due to thermal stress.

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Microscale evolution of reefal microbialites

Sho Koyano, Fumito Shiraishi, Yosuke Yokoyama, Kazuhiko Fujita

Coral Reefs and Sea-Level Change: Quaternary Records and Modelling ( International Association of Sedimentologists )    39 - 67   2022.12 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Reefal microbialites are crusts and infills of microbialites developed within primary cavities of late Quaternary coralgal reef frameworks. In spite of many previous studies, factors controlling mesofabric transitions, particularly from laminated to digitate microbialites but as well as the microscale formation process in relation to microbial communities, have not yet been fully understood. Furthermore, there are still controversies regarding age differences between reef framework growth and microbialite formation. The authors have discussed the macroscale evolution of primary cavities as well as the microscale evolution of reefal microbialites obtained in a middle Holocene reef core drilled off Okinawa Island, south-west Japan, based on petrographic observations using light and scanning electron microscopy with energy dispersive X-ray spectroscopy and radiocarbon (14C) ages of corals and reefal microbialites. The authors' petrographic observations show that coralgal reef framework growth was followed by encrusting foraminifers and metazoans, coevally with macro-bioerosion and microbioerosion of coralgal frameworks, then finally infilled with an intraskeletal and boring-filling microbialite (IBFM) and encrusted by reefal microbial crusts (RMCs), including structureless and digitate microbialites. The observed macroscale evolution was probably driven in response to progressive changes to reduced light and water circulation in the primary cavities associated with middle Holocene transgression and reef formation. The microfabric of reefal microbialites consists of primary in situ precipitated peloids (spherical micritic clots), voids (primary pores) and allochthonous detrital grains (bioclastic and siliciclastic) fallen from upper reef surfaces. IBFM geopetally infilled inside bioeroded cavities soon after the bioerosion of coralgal frameworks. RMCs have a two-layered microfabric succession, which is composed of the alternation of dense peloidal aggregates and laterally aligned voids in the lower part and the mixing of peloidal aggregates and irregularly and vertically developed voids in the upper part. The authors speculate that the repeated occurrences of laterally aligned voids in the lower part may imply the intermittent pauses of peloidal formation, while peloids accumulated on the irregular outer surfaces may result in the formation of vertically developed voids and digitate surfaces in the upper part. These peloids are probably formed by coccoid sulfate-reducing bacteria in anoxic environments developed by the degradation of bacterial biofilms and organic matters, allowing sulfate reduction and increasing alkalinity, therefore carbonate precipitation. The two-layered microfabric succession generally observed in RMCs may reflect spatial-temporal oxic/anoxic variations in interstitial water and the degree of sulfate ion supply by the gradual closing of primary cavities.

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Reef growth history at intermediate to mesophotic depths since the end of the Last Glacial period along the Great Barrier Reef shelf edge

Marc Humblet, Jody M. Webster, Yusuke Yokoyama, Juan Carlos Braga, Kazuhiko Fujita, Yasufumi Iryu, Stewart J. Fallon, William G. Thompson

Coral Reefs and Sea-Level Change: Quaternary Records and Modelling ( International Association of Sedimentologists )    189 - 214   2022.12 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Reef communities at intermediate (10 to 30 m) and mesophotic (~ 30 to 150 m) depths occupy large areas of sea floor but little is known about their potential to accrete vertically, their response to sea-level change and other environmental perturbations. In this study, the authors have examined cores from two holes, M0040A and M0041A, drilled by the International Ocean Drilling Program Expedition 325 along the shelf edge of the modern GBR at 131 m water depth. The objective was to investigate reef growth history at palaeo-water depths > 20 m over a time period spanning 30,000 years, from the end of the Last Glacial period through the last deglaciation. Based on changes in lithologies and biotic components, and a robust chronostratigraphic framework supported by 47 radiometric ages, the authors have identified two episodes of reef growth, one during Marine Isotope Stage (MIS) 2 and the other at the onset of the deglaciation, both characterised by abundant microbialite crusts and distinct coral assemblages. Palaeo-water depths range from 30 to 60 m and from 20 to 30 m for the MIS 2 and early deglacial reef sections, respectively. The first episode of reef growth documented in the cores initiated at 27 to 25 ka, possibly in response to increased light availability and change in sedimentation resulting from falling sea-level between 32 and 29 ka from MIS 3 and also to low atmospheric pCO2 at the end of the Last Glacial period. Reef accretion was reduced or ceased sometime between 24 and 19 ka, coinciding with the rapid 20 m sea-level fall of the peak Last Glacial Maximum and minima of SSTs. Reef growth resumed at 19.5 to 18.5 ka, influenced by a period of moderate sea-level rise and increasing sea surface temperatures at the onset of the deglaciation. Reef growth termination at ca. 17 ka correlates with a major episode of reef demise previously identified in adjacent mid and outer terrace cores and linked to reduced water quality combined with rapid deglacial sea-level rise. Vertical accretion (VA) rates were calculated based on two methods: linear visual fitting and Bayesian modelling. The findings show that the highest VA rates are associated with microbialite boundstone. Reef ecosystems dominated by microbialite and corals developed at intermediate and mesophotic depths, and grew vertically at maximum rates of 2 to 5 mm yr-1 depending on the method used, over a period of rapid environmental change during the transition from MIS 3 to MIS 1. Further study needs to explore the potential of modern-type deep coralgal communities to cope with higher rates of sea-level rise predicted this century.

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Trophic niche separation of two non-spinose planktonic foraminifers Neogloboquadrina dutertrei and Pulleniatina obliquiloculata

Toue R.

Progress in Earth and Planetary Science ( Progress in Earth and Planetary Science )  9 ( 1 )   2022.12 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Abstract Based on laboratory observations, planktonic foraminifers are omnivorous, feeding zooplankton and phytoplankton. Spinose species tend toward greater dependence on zooplankton prey than on phytoplankton prey, while non-spinose species are more adapted to herbivorous diets. However, the trophic activity of planktonic foraminifers in the natural environment and their trophic positions in the marine food web have not yet been fully understood. The trophic position (TP) of two non-spinose species, Neogloboquadrina dutertrei and Pulleniatina obliquiloculata, was determined by differences in the nitrogen isotopic composition between two amino acids (glutamic acid and phenylalanine). Results show that TP values of N. dutertrei were ~ 2.4, indicating dependence on omnivorous (mixed herbivorous and carnivorous) diets, while those of P. obliquiloculata were ~ 2.1, indicating dependence on herbivorous diets. Together with previous laboratory observations, these TP values suggest that N. dutertrei is a detritivore or scavenger, while P. obliquiloculata is generally a herbivore. This trophic niche separation likely allows these two planktonic foraminiferal species to live within a similar depth zone in the open water column and provides a clue for understanding causes of spatial and temporal changes in their relative abundances in living and sediment assemblages.

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Light is an Important Limiting Factor for the Vertical Distribution of the Largest Extant Benthic Foraminifer Cycloclypeus carpenteri

Kazuhiko Fujita, Yoji Kanda, Takashi Hosono

Journal of Earth Science ( Springer Science and Business Media LLC )  33 ( 6 ) 1460 - 1468   2022.09 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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The coral reef-dwelling Peneroplis spp. shows calcification recovery to ocean acidification conditions.

Charrieau LM, Nagai Y, Kimoto K, Dissard D, Below B, Fujita K, Toyofuku T

Scientific reports ( Scientific Reports )  12 ( 1 ) 6373   2022.04 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Abstract Large Benthic Foraminifera are a crucial component of coral-reef ecosystems, which are currently threatened by ocean acidification. We conducted culture experiments to evaluate the impact of low pH on survival and test dissolution of the symbiont-bearing species Peneroplis spp., and to observe potential calcification recovery when specimens are placed back under reference pH value (7.9). We found that Peneroplis spp. displayed living activity up to 3 days at pH 6.9 (Ω_cal < 1) or up to 1 month at pH 7.4 (Ω_cal > 1), despite the dark and unfed conditions. Dissolution features were observed under low Ω_cal values, such as changes in test density, peeled extrados layers, and decalcified tests with exposed organic linings. A new calcification phase started when specimens were placed back at reference pH. This calcification’s resumption was an addition of new chambers without reparation of the dissolved parts, which is consistent with the porcelaneous calcification pathway of Peneroplis spp. The most decalcified specimens displayed a strong survival response by adding up to 8 new chambers, and the contribution of food supply in this process was highlighted. These results suggest that porcelaneous LBF species have some recovery abilities to short exposure (e.g., 3 days to 1 month) to acidified conditions. However, the geochemical signature of trace elements in the new calcite was impacted, and the majority of the new chambers were distorted and resulted in abnormal tests, which might hinder the specimens’ reproduction and thus their survival on the long term.

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Larger porcelaneous foraminifera with a common ancestor: The Neogene Indo-Pacific Flosculinella and Alveolinella (Alveolinoidea)

Davide Bassi, Monica Bolivar-Feriche, Willem Renema, Juan C. Braga, Johannes Pignatti, Giovanni Di Domenico, Kazuhiko Fujita, Jere H. Lipps, Jesús Reolid, Yasufumi Iryu

Marine Micropaleontology ( Elsevier BV )  173   102124 - 102124   2022.04 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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EPHEMERAL MASKS IN THE ELLIPSOIDAL FORAMINIFERA ALVEOLINELLA AND BORELIS (ALVEOLINOIDEA): RESILIENT SOLUTIONS TO STABILIZATION IN CORAL-REEF SETTINGS

Bassi D.

Journal of Foraminiferal Research ( Journal of Foraminiferal Research )  52 ( 2 ) 92 - 98   2022.04 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Decrease in volume and density of foraminiferal shells with progressing ocean acidification.

Kuroyanagi A, Irie T, Kinoshita S, Kawahata H, Suzuki A, Nishi H, Sasaki O, Takashima R, Fujita K

Scientific reports ( Scientific Reports )  11 ( 1 ) 19988   2021.10 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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<title>Abstract</title>Rapid increases in anthropogenic atmospheric CO₂ partial pressure have led to a decrease in the pH of seawater. Calcifying organisms generally respond negatively to ocean acidification. Foraminifera are one of the major carbonate producers in the ocean; however, whether calcification reduction by ocean acidification affects either foraminiferal shell volume or density, or both, has yet to be investigated. In this study, we cultured asexually reproducing specimens of <italic>Amphisorus kudakajimensis,</italic> a dinoflagellate endosymbiont-bearing large benthic foraminifera (LBF), under different pH conditions (pH 7.7–8.3, NBS scale). The results suggest that changes in seawater pH would affect not only the quantity (i.e., shell volume) but also the quality (i.e., shell density) of foraminiferal calcification. We proposed that pH and temperature affect these growth parameters differently because (1) they have differences in the contribution to the calcification process (e.g., Ca²⁺-ATPase and Ω) and (2) pH mainly affects calcification and temperature mainly affects photosynthesis. Our findings also suggest that, under the IPCC RCP8.5 scenario, both ocean acidification and warming will have a significant impact on reef foraminiferal carbonate production by the end of this century, even in the tropics.

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Temperature effects on the shell growth of a larger benthic foraminifer (Sorites orbiculus): Results from culture experiments and micro X-ray computed tomography

Shunichi Kinoshita, Azumi Kuroyanagi, Hodaka Kawahata, Kazuhiko Fujita, Toyoho Ishimura, Atsushi Suzuki, Osamu Sasaki, Hiroshi Nishi

Marine Micropaleontology ( Elsevier BV )  163   101960 - 101960   2021.03 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Shimajiri Group equivalent sedimentary rocks dredged from sea knolls off Kume Island, central Ryukyus: Implications for timing and mode of rifting of the middle Okinawa Trough back‐arc basin

Ritoko Kikunaga, Ke‐han Song, Shun Chiyonobu, Kazuhiko Fujita, Ryuichi Shinjo, Kyoko Okino

Island Arc ( Wiley )  30 ( 1 )   2021.01 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Reefal microbial crusts found in Middle Holocene reef from Okinawa Island, the Ryukyu Archipelago

Kazuhiko FUJITA, Toru SASAKI, Sho KOYANO, Masaaki CHINEN, Chuki HONGO, Jody M. WEBSTER, Yasufumi IRYU

Galaxea, Journal of Coral Reef Studies     2020.10 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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High‐resolution evidence for middle Holocene East Asian winter and summer monsoon variations: Snapshots of fossil coral records

Asami R., Yoshimura N., Toriyabe H., Minei S., Shinjo R., Hongo C., Sakamaki T., Fujita K.

Geophysical Research Letters     2020.08 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Reef-flat and back-reef development in the Great Barrier Reef caused by rapid sea-level fall during the Last Glacial Maximum (30–17 ka)

Kazuhiko Fujita, Noriko Yagioka, Choko Nakada, Hironobu Kan, Yosuke Miyairi, Yusuke Yokoyama, Jody M. Webster

Geology     2020.01 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Perspective on the response of marine calcifiers to global warming and ocean acidification—Behavior of corals and foraminifera in a high CO<inf>2</inf> world “hot house”

Kawahata H.

Progress in Earth and Planetary Science ( Progress in Earth and Planetary Science )  6 ( 1 )   2019.12

Type of publication: Research paper (scientific journal)

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Magnesium Isotopic Composition of Tests of Large Benthic Foraminifers: Implications for Biomineralization

Maeda A.

Geochemistry, Geophysics, Geosystems ( Geochemistry, Geophysics, Geosystems )  20 ( 8 ) 4046 - 4058   2019.08

Type of publication: Research paper (scientific journal)

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Partitioning and chemical environments of minor elements in individual large benthic foraminifera cultured in temperature-controlled tanks

Yoshimura T.

Frontiers in Earth Science ( Frontiers in Earth Science )  7   2019.06 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Late glacial to deglacial variation of coralgal assemblages in the Great Barrier Reef, Australia

Humblet M.

Global and Planetary Change ( Global and Planetary Change )  174   70 - 91   2019.03

Type of publication: Research paper (scientific journal)

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Depositional environments beneath the shelf-edge slopes of the Great Barrier Reef, inferred from foraminiferal assemblages: IODP Expedition 325

Yagioka N.

Palaeogeography, Palaeoclimatology, Palaeoecology ( Palaeogeography, Palaeoclimatology, Palaeoecology )  514   386 - 397   2019.01

Type of publication: Research paper (scientific journal)

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Calibration between temperature and Mg/Ca and oxygen isotope ratios in high-magnesium calcite tests of asexually reproduced juveniles of large benthic foraminifers

Maeda A.

Marine Micropaleontology ( Marine Micropaleontology )  143   63 - 69   2018.09

Type of publication: Research paper (scientific journal)

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Rapid glaciation and a two-step sea level plunge into the Last Glacial Maximum.

Yokoyama Y, Esat TM, Thompson WG, Thomas AL, Webster JM, Miyairi Y, Sawada C, Aze T, Matsuzaki H, Okuno J, Fallon S, Braga JC, Humblet M, Iryu Y, Potts DC, Fujita K, Suzuki A, Kan H

Nature   559 ( 7715 ) 603 - 607   2018.07

Type of publication: Research paper (scientific journal)

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Response of the Great Barrier Reef to sea-level and environmental changes over the past 30,000 years

Webster J.

Nature Geoscience ( Nature Geoscience )  11 ( 6 ) 426 - 432   2018.06

Type of publication: Research paper (scientific journal)

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Depositional environments of well-sorted detrital limestone from the Minatogawa Formation in the southern part of Okinawa Island, the Ryukyu Archipelago, Japan

Fujita K.

Island Arc ( Island Arc )  27 ( 3 )   2018.05

Type of publication: Research paper (scientific journal)

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学会誌：これまでの活動と今後の展望

藤田 和彦, 波利井 佐紀, 日高 道雄, 山城 秀之

日本サンゴ礁学会誌 ( 日本サンゴ礁学会 )  20 ( 1 ) 89 - 97   2018

Type of publication: Research paper (scientific journal)

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星砂の磨耗度と放射性炭素年代に基づく瀬底島海浜堆積物の生産年代と運搬・堆積過程

伊藤 真裕子, 森 愛, 本郷 宙軌, 浅海 竜司, 宮入 陽介, 横山 祐典, 藤田 和彦

日本サンゴ礁学会誌 ( 日本サンゴ礁学会 )  20 ( 1 ) 1 - 20   2018

Type of publication: Research paper (scientific journal)

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<p>琉球列島の海浜堆積物は主に石灰化生物の骨格片や殻で構成される。しかし，海浜堆積物の生産年代，生産場から海浜への運搬時間や堆積年代についてはよく分かっていない。本研究では，沖縄県瀬底島の海浜・サンゴ礁で採取した表層堆積物試料を用いて，有孔虫<i>Baculogypsina sphaerulata</i>（ホシスナ）の遺骸殻（以下，星砂と表記する）の磨耗度と放射性炭素（¹⁴C）年代から，海浜堆積物の生産年代や運搬・堆積過程を明らかにすることを目的とした。星砂の磨耗度分析の結果，礁原から海浜に向かって棘がある星砂の比率が低くなり，海浜では棘がない摩耗した星砂が多くみられる。¹⁴C年代測定の結果，サンゴ礁・海浜堆積物中の星砂の¹⁴C年代は全て約700cal yr BP（西暦1950年を基準とする暦年代）以降を示す。星砂の¹⁴C年代は礁原から海浜へ古くなる傾向がみられるが，礁池や礁原にも比較的古い摩耗した星砂がみられる。海浜堆積物の星砂の¹⁴C年代は，北端でより新しく，屈曲した中央部でより古い。一方，海浜堆積物中のサンゴ片・貝殻の¹⁴C年代の多くは西暦1950年以降の年代を示す。これらの結果から，星砂の生産は約700cal yr BP以降に増加したと考えられる。これは，後期完新世の相対的な海水準の低下に伴う礁原の発達によってホシスナの生息場が増加したことが関連すると考えられる。また，星砂は死後の数十年～数百年で波浪により礁原から海浜へ運ばれた後，沿岸流（潮汐流）により主に海浜の北側から中央部へ徐々に集積し，再びサンゴ礁へ戻されると推測される。さらに海浜の前進は現在も続いていることが示唆される。</p>

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Response of subtropical submarine-cave ecosystem to Holocene cave development and Asian monsoon variability

Chiu W.

Paleobiology ( Paleobiology )  43 ( 3 ) 425 - 434   2017.08

Type of publication: Research paper (scientific journal)

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Proton pumping accompanies calcification in foraminifera.

Toyofuku T, Matsuo MY, de Nooijer LJ, Nagai Y, Kawada S, Fujita K, Reichart GJ, Nomaki H, Tsuchiya M, Sakaguchi H, Kitazato H

Nature communications ( Nature Communications )  8   14145   2017.01

Type of publication: Research paper (scientific journal)

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Evaluation of oxygen isotope and Mg/Ca ratios in high-magnesium calcite from benthic foraminifera as a proxy for water temperature

Maeda A.

Journal of Geophysical Research: Biogeosciences ( Journal of Geophysical Research: Biogeosciences )  122 ( 1 ) 185 - 199   2017.01

Type of publication: Research paper (scientific journal)

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An enigmatic Holocene podocopid ostracod from a submarine cave, Okinawa, Japan: ‘living fossil’ or adaptive morphotype?

Chiu W.

Journal of Systematic Palaeontology ( Journal of Systematic Palaeontology )  14 ( 8 ) 643 - 652   2016.08

Type of publication: Research paper (scientific journal)

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Shell productivity of the large benthic foraminifer Baculogypsina sphaerulata, based on the population dynamics in a tropical reef environment

Fujita K.

Coral Reefs ( Coral Reefs )  35 ( 1 ) 317 - 326   2016.03

Type of publication: Research paper (scientific journal)

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Cytological Observations of the Large Symbiotic Foraminifer Amphisorus kudakajimensis Using Calcein Acetoxymethyl Ester.

Ohno Y, Fujita K, Toyofuku T, Nakamaura T

PloS one ( PLoS ONE )  11 ( 11 ) e0165844   2016

Type of publication: Research paper (scientific journal)

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Effects of causeway construction on environment and biota of subtropical tidal flats in Okinawa, Japan.

Reimer JD, Yang SY, White KN, Asami R, Fujita K, Hongo C, Ito S, Kawamura I, Maeda I, Mizuyama M, Obuchi M, Sakamaki T, Tachihara K, Tamura M, Tanahara A, Yamaguchi A, Jenke-Kodama H

Marine pollution bulletin ( Marine Pollution Bulletin )  94 ( 1-2 ) 153 - 67   2015.05

Type of publication: Research paper (scientific journal)

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Modern and Pleistocene large-sized benthic foraminifers from Tahiti, French Polynesia, collected during IODP Expedition 310

Fujita, K., Omori, A.,

Island Arc ( その他の出版社 )  24   47 - 60   2015

Type of publication: Research paper (scientific journal)

Modern and Pleistocene large-sized benthic foraminifers from Tahiti, French Polynesia, collected during IODP Expedition 310

Fujita, K., Omori, A.,

Island Arc ( Island Arc )  24 ( 1 ) 47 - 60   2015 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Submerged karst landforms observed by multibeam bathymetric survey in Nagura Bay, Ishigaki Island, southwestern Japan

Kan, H., Urata, K., Nagao, M., Hori, N., Fujita, K., Yokoyama, Y., Nakashima, Y., Ohashi, T., Goto, K., Suzuki, A.

Geomorphology   229   112 - 124   2015 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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Oxygen Metabolic Responses of Three Species of Large Benthic Foraminifers with Algal Symbionts to Temperature Stress

Fujita K., Okai T., Hosono T.

PLOS ONE ( その他の出版社 )  9 ( 3 ) e90304   2014 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Respiratory electron transport system activity in symbiotic corals and its link to calcification

Agostini, S., Fujimura, H., Fujita, K., Suzuki, Y., Nakano, Y.

Aquatic Biology ( その他の出版社 )  18   125 - 139   2013 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Estimating photophysiological condition of endosymbiont-bearing Baculogypsina sphaerulata based on the holobiont color represented in CIE L*a*b* color space

Hosono T., Fujita K., Kayanne H.

Marine Biology ( その他の出版社 )  159   2663 - 2673   2012 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Assessing subsidence rates and paleo water-depths for Tahiti reefs using U-Th chronology of altered corals

Thomas A.L., Fujita K., Iryu Y., Bard E., Cabioch G., Camoin G., Cole J.E., Deschamps P., Durand N., Hamelin B., Heindel K., Henderson G.M., Mason A.J., Matsuda H., Ménabréaz L., Omori A., Quinn T., Sakai S., Sato T., Sugihara K., Takahashi Y., Thouveny N., Tudhope A.W., Webster J., Westphal H., Yokoyama Y.

Marine Geology ( その他の出版社 )  295-298   86 - 94   2012 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Distribution of gravel-sized empty tests of large benthic foraminifers as practical depositional indicators in tropical reef and shelf carbonate environments

Fujita K., Kato S.

Facies ( その他の出版社 )  57   525 - 541   2011.09 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Contrasting calcification responses to ocean acidification between two reef foraminifers harboring different algal symbionts

Hikami M., Ushie H., Irie T. Fujita K., Kuroyanagi A., Sakai K., Nojiri Y., Suzuki A., Kawahata H.

Geophysical Research Letter ( その他の出版社 )  38   L19601   2011.09 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers

Fujita K., Hikami M., Suzuki A., Kuroyanagi A., Sakai K., Kawahata H., Nojiri Y.

Biogeosciences ( その他の出版社 )  8   2089 - 2098   2011.08 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers

Fujita K., Hikami M., Suzuki A., Kuroyanagi A., Kawahata H.

Biogeosciences Discussion ( その他の出版社 )  8   1809 - 1829   2011.02 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Sea-level history recorded in the Pleistocene carbonate sequence in IODP Hole 310-M0005D, off Tahiti.

Iryu Y., Takahashi Y., Fujita K., Camoin G., Cabioch G., Matsuda H., Sato T., Sugihara K., Webster J.M., Westphal H.

Island Arc ( その他の出版社 )  19   690 - 706   2010.12 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Human impacts on large benthic foraminifers near a densely populated area of Majuro Atoll, Marshall Islands

Osawa Y., Fujita K., Umezawa Y., Kayanne H., Ide Y., Nagaoka T., Miyajima T., Yamano H.

Marine Pollution Bulletin ( その他の出版社 )  60   1279 - 1287   2010.06 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Reconstruction of light conditions within a submarine cave during the past 7,000 years based on the temporal and spatial distribution of algal symbiont-bearing large benthic foraminifers.

Omori A., Kitamura A., Fujita K., Honda K., Yamamoto N.

Palaeogeography, Palaeoclimatology, Palaeoecology ( その他の出版社 )  292   443 - 452   2010.04 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Sea-level rise during Termination II inferred from large benthic foraminifers: IODP Expedition 310, Tahiti Sea-Level

Fujita K., Omori A., Yokoyama Y., Sakai S., Iryu Y.

Marine Geology ( その他の出版社 )  271   149 - 155   2010.03 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Impacts of ocean acidification on large benthic foraminifers: Results from laboratory experiments

Kuroyanagi, A., Kawahata, H., Suzuki, A., Fujita, K., Irie, T.

Marine Micropaleontology ( その他の出版社 )  73   190 - 195   2009.09 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Distribution and sediment production of large benthic foraminifers on reef flats of the Majuro Atoll, Marshall Islands

Fujita K., Osawa Y., Kayanne H., Ide Y., Yamano H.

Coral Reefs ( その他の出版社 )  28 ( 1 ) 29 - 45   2009.04 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Shallow seismic profiling survey on postglacial fore-reef near the present-day northern limit of coral reef formation in the northwestern Pacific

Arai, K., Inoue, T., Matsuda, H., Machiyama, H., Sasaki, K., Iryu, Y., Sugihara, K., Fujita, K., and Nara, M.

Proceedings of the 11th International Coral Reef Symposium (Ft. Lauderdale, Florida) ( その他の出版社 )    2009.01 [ Peer Review Accepted ]

Type of publication: Research paper (other science council materials etc.)

A field experiment on the microhabitat preference of algal-symbiont-bearing larger foraminifera in a reef-crest algal turf zone, Ishigaki Island, Okinawa, Japan

Fujita K.

Galaxea, Journal of Coral Reef Studies ( その他の出版社 )  10 ( 1 ) 15 - 25   2008.06 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Organic and inorganic carbon production by algal symbiont-bearing foraminifera on northwest pacific coral-reef flats

Fujita K., Fujimura H.

Journal of Foraminiferal Research ( その他の出版社 )  38   117 - 126   2008.04 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Evaluation of various satellite sensors for waterline extraction in a coral reef environment: Majuro Atoll, Marshall Islands（共著）

Yamano H., Shimazaki H., Matsunaga T., Ishoda A., McClennen C., Yokoki H., Fujita K., Osawa Y., Kayanne H.

Geomorphology ( その他の出版社 )  82   398 - 411   2006.12 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Paleoenvironmental interpretations of Quaternary reef deposits based on comparisons of selected ten modern and fossil larger foraminifera from the Ryukyu Islands, Japan（共著）

Fujita K., Shimoji H., Nagai K.

Island Arc ( その他の出版社 )  15 ( 4 ) 420 - 436   2006.10 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Latitudinal changes in larger benthic foraminiferal assemblages in shallow-water reef sediments along the Ryukyu Islands, Japan（共著）

Sugihara K., Masunaga N., Fujita K

Sugihara K., Masunaga N., Fujita K. ( その他の出版社 )  15 ( 4 ) 437 - 454   2006.10 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Identification of coral reef environments based on foraminiferal death assemblages from Ishigaki Island, Okinawa, Japan

Fujita K.

Proceedings of 10th International Coral Reef Symposium, Okinawa ( その他の出版社 )    528 - 535   2006.04 [ Peer Review Accepted ]

Type of publication: Research paper (other science council materials etc.)

A field colonization experiment on small-scale distributions of algal symbiont-bearing larger foraminifera on reef rubble

Fujita K.

Journal of Foraminiferal Research ( その他の出版社 )  34 ( 3 ) 169 - 179   2004.03 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

Population dynamics of Marginopora kudakajimensis Gudmundsson (Foraminifera: Soritidae) in the Ryukyu Islands, the subtropical northwest Pacific（共著）

Fujita K., Nishi H., Saito T.

Marine Micropaleontology ( その他の出版社 )  38   267 - 284   2000.03 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

琉球列島沿岸海草帯に生息する葉上性有孔虫類の季節変化（共著）

藤田和彦, 西　弘嗣, 斎藤常正

化石 ( その他の出版社 )  ( 66 ) 16 - 33   1999.03 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

A comparison of phytal substrate preferences of Archaias angulatus and Sorites orbiculus in mixed macroalgal-seagrass beds in Florida Bay（共著）

Fujita K., Hallock P.

Journal of Foraminiferal Research ( その他の出版社 )  29 ( 2 ) 143 - 151   1999.03 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)