Updated on 2022/03/28

写真a

 
HUMBLET Marc Andre
 
Organization
Graduate School of Environmental Studies Department of Earth and Environmental Sciences Associate professor
Graduate School
Graduate School of Environmental Studies
Title
Associate professor
Contact information
メールアドレス

Degree 3

  1. Doctor degree in Earth Science ( 2007.9   Tohoku University ) 

  2. Master degree in Oceanology ( 2002.9   Liege University ) 

  3. Bachelor degree in Earth Science ( 2000.9   Liege University ) 

Research Interests 6

  1. Carbonate sedimentology

  2. Coral reefs

  3. Quaternary

  4. Sea level change

  5. Climate change

  6. Coral taxonomy

Research Areas 2

  1. Natural Science / Solid earth sciences

  2. Natural Science / Biogeosciences

Current Research Project and SDGs 3

  1. Quaternary reef growth history, sea-level and environmental changes

  2. Modern biota, sediments and seafloor morphology at mesophotic depths in the Ryukyu Islands, Japan

  3. Taxonomic identification of fossil scleractinian corals

Professional Memberships 4

  1. Japanese Geoscience Union   Regular member

  2. Geological Society of Japan   Regular member

  3. Japanese Coral Reef Society   Regular member

  4. International Coral Reef Society

 

Papers 32

  1. A standardized database of Marine Isotopic Stage 5e sea-level proxies on tropical Pacific islands Reviewed International coauthorship

    Hallmann, N., Camoin, G., Webster, J.M., and Humblet, M.

    Earth System Science Data     2021.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5194/essd-13-2651-2021

  2. Coral Record of Younger Dryas Chronozone Warmth on the Great Barrier Reef Reviewed International coauthorship

    Brenner Logan D., Linsley Braddock K., Webster Jody M., Potts Donald, Felis Thomas, Gagan Michael K., Inoue Mayuri, McGregor Helen, Suzuki Atsushi, Tudhope Alexander, Esat Tezer, Thomas Alex, Thompson William, Fallon Stewart, Humblet Marc, Tiwari Manish, Yokoyama Yusuke

    PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY   Vol. 35 ( 12 )   2020.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2020PA003962

    Web of Science

  3. Controls on the spatio-temporal distribution of microbialite crusts on the Great Barrier Reef over the past 30,000 years Reviewed International coauthorship

    Szilagyi Zs, Webster Jody M., Patterson Madhavi A., Hips Kinga, Riding Robert, Foley Matthew, Humblet Marc, Yokoyama Yusuke, Liang Liyuan, Gischler Eberhard, Montaggioni Lucien, Gherardi Douglas, Braga Juan C.

    MARINE GEOLOGY   Vol. 429   2020.11

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.margeo.2020.106312

    Web of Science

  4. Bioerosion traces in the Great Barrier Reef over the past 10 to 30 kyr Reviewed International coauthorship

    Patterson Madhavi A., Webster Jody M., Hutchings Pat, Braga Juan-Carlos, Humblet Marc, Yokoyama Yusuke

    PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY   Vol. 542   2020.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.palaeo.2019.109503

    Web of Science

  5. A new model of Holocene reef initiation and growth in response to sea-level rise on the Southern Great Barrier Reef Reviewed International coauthorship

    Sanborn Kelsey L., Webster Jody M., Webb Gregory E., Braga Juan Carlos, Humblet Marc, Nothdurft Luke, Patterson Madhavi A., Dechnik Belinda, Warner Susan, Graham Trevor, Murphy Richard J., Yokoyama Yusuke, Obrochta Stephen P., Zhao Jian-Xin, Salas-Saavedra Marcos

    SEDIMENTARY GEOLOGY   Vol. 397   2020.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.sedgeo.2019.105556

    Web of Science

  6. Deep-Water Macroid Beds of the Ryukyu Islands, Japan: Encrusting Acervulinids as Ecosystem Engineers

    Bassi Davide, Iryu Yasufumi, Humblet Marc, Matsuda Hiroki, Machiyama Hideaki, Sasaki Keiichi, Matsuda Shinya, Arai Kohsaku, Inoue Takahiko

    JOURNAL OF COASTAL RESEARCH   Vol. 35 ( 2 ) page: 463 - 466   2019.3

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

    Humblet M., Potts D. C., Webster J. M., Braga J. C., Iryu Y., Yokoyama Y., Bourillot R., Seard C., Droxler A., Fujita K., Gischler E., Kan H.

    GLOBAL AND PLANETARY CHANGE   Vol. 174   page: 70 - 91   2019.3

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    Authorship:Lead author  

    DOI: 10.1016/j.gloplacha.2018.12.014

    Web of Science

  8. Holocene and Pleistocene fringing reef growth and the role of accommodation space and exposure to waves and currents (Bora Bora, Society Islands, French Polynesia)

    Gischler Eberhard, Hudson J. Harold, Humblet Marc, Carlos Braga Juan, Schmitt Dominik, Isaack Anja, Eisenhauer Anton, Camoin Gilbert F.

    SEDIMENTOLOGY   Vol. 66 ( 1 ) page: 305 - 328   2019.1

  9. Ryukyu Islands, Japan

    Sinniger Frederic, Harii Saki, Humblet Marc, Nakamura Yohei, Ohba Hideo, Prasetia Rian

    MESOPHOTIC CORAL ECOSYSTEMS   Vol. 12   page: 231 - 247   2019

  10. Last interglacial reef facies and late Quaternary subsidence in the Maldives, Indian Ocean

    Gischler Eberhard, Humblet Marc, Carlos Braga Juan, Eisenhauer Anton

    MARINE GEOLOGY   Vol. 406   page: 34 - 41   2018.12

  11. Low-Altitude and High-Speed Terrain Tracking Method for Lightweight AUVs

    Maki Toshihiro, Noguchi Yukiyasu, Kuranaga Yoshinori, Masuda Kotohiro, Sakamaki Takashi, Humblet Marc, Furushima Yasuo

    JOURNAL OF ROBOTICS AND MECHATRONICS   Vol. 30 ( 6 ) page: 971 - 979   2018.12

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

    Yokoyama Yusuke, Esat Tezer M., Thompson William G., Thomas Alexander L., Webster Jody M., Miyairi Yosuke, Sawada Chikako, Aze Takahiro, Matsuzaki Hiroyuki, Okuno Jun'ichi, Fallon Stewart, Braga Juan-Carlos, Humblet Marc, Iryu Yasufumi, Potts Donald C., Fujita Kazuhiko, Suzuki Atsushi, Kan Hironobu

    NATURE   Vol. 559 ( 7715 ) page: 603 - +   2018.7

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

    Webster Jody M., Carlos Braga Juan, Humblet Marc, Potts Donald C., Iryu Yasufumi, Yokoyama Yusuke, Fujita Kazuhiko, Bourillot Raphael, Esat Tezer M., Fallon Stewart, Thompson William G., Thomas Alexander L., Kan Hironobu, McGregor Helen V., Hinestrosa Gustavo, Obrochta Stephen P., Lougheed Bryan C.

    NATURE GEOSCIENCE   Vol. 11 ( 6 ) page: 426 - +   2018.6

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

    FUJITA, K., ARUGA, K., HUMBLET, M., and NAGAI, K.

    Island Arc     2018.3

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    Language:English  

    DOI: 10.1111/iar.12247

  15. Coral community changes in the Great Barrier Reef in response to major environmental changes over glacial-interglacial timescales Reviewed

    HUMBLET, M., WEBSTER, J.M.

    Palaeogeography, Palaeoclimatology, Palaeoecology   Vol. 472   page: 216-235   2017.2

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    Authorship:Lead author   Language:English  

    DOI: 10.1016/j.palaeo.2017.02.003

  16. AUV HATTORI: A Lightweight Platform for High-speed Low-altitude Survey of Rough Terrains

    Maki Toshihiro, Kuranaga Yoshinori, Noguchi Yukiyasu, Sakamaki Takashi, Masuda Kotohiro, Humblet Marc, Furushima Yasuo

    OCEANS 2017 - ANCHORAGE     2017

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  17. Late Quaternary barrier and fringing reef development of Bora Bora (Society Islands, south Pacific): first subsurface data from Darwin's type barrier-reef system Reviewed

    GISCHLER, E., HUDSON, H., HUMBLET, M., BRAGA, J-C., EISENHAUER, A., ANJA, I., ANSELMETTI, F., AND CAMOIN, G.

    Sedimentology   Vol. 63   page: 1522–1549   2016.9

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    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    DOI: 10.1111/sed.12272

  18. An identification guide to some major Quaternary fossil reef-building coral genera (Acropora, Isopora, Montipora, and Porites) Reviewed

    HUMBLET, M., HONGO, C., AND SUGIHARA, K.

    Island Arc   Vol. 24   page: 16-30   2015.2

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    Authorship:Lead author   Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    DOI: 10.1111/iar.12077

  19. Pleistocene coral assemblages on Irabu-jima, South Ryukyu Islands, Japan Reviewed

    HUMBLET, M. AND IRYU, Y.

    Paleontological Research   Vol. 18 ( 4 ) page: 224-244   2014.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    DOI: 10.2517/2014PR020

  20. Subsidence of the Miyako-Sone submarine carbonate platform, east of Miyako-jima Island, northwestern Pacific Ocean Reviewed

    ARAI, K., MACHIYAMA, H., CHIYONOBU, S., MATSUDA, H., SASAKI, K., HUMBLET, M. AND IRYU, Y.

    Island Arc   Vol. 23   page: 1-15   2014.2

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    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    DOI: 10.1111/iar.12051

  21. Magnetic susceptibility as a high-resolution correlation tool and as a climatic proxy in Paleozoic rocks-merits and pitfalls: examples from the Devonian in Belgium Reviewed

    DA SILVA, AC., DE VLEESCHOUWER, D., BOULVAIN, F., CLAEYS, P., FAGEL, N., HUMBLET, M., MABILLE, C., MICHEL, J., SARDAR ABADI, M., PAS, D., AND DEKKERS, M.

    Marine and Petroleum Geology   Vol. 46   page: 173-189   2013.6

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    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

  22. Recent macroids on the Kikai-jima shelf, Central Ryukyu Islands, Japan Reviewed

    BASSI, D., IRYU, Y., HUMBLET, M., MATSUDA, H., MACHIYAMA, H., SASAKI, K., MATSUDA, S., ARAI, K. AND INOUE, T.

    Sedimentology   Vol. 59 ( 7 ) page: 2024-2041   2012.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (bulletin of university, research institution)  

    DOI: 10.1111/j.1365-3091.2012.01333.x

  23. Stratigraphy of the Ryukyu Group and the Chinen Formation in southern Okinawa-jima, Ryukyu Islands, Japan Reviewed

    Kenichi Sagae

    Journal of the Geological Society of Japan   Vol. 118 ( 2 ) page: 117-136   2012.2

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    Language:Japanese   Publishing type:Research paper (bulletin of university, research institution)  

  24. Recent ichnocoenoesis in deep water macroids, Ryukyu Islands Reviewed

    BASSI, D., HUMBLET, M. and IRYU, Y.

    Palaios   Vol. 26   page: 232-238   2011.1

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    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

  25. Great Barrier Reef Environmental Changes. The Last Deglacial Sea Level Rise in the South Pacific: Offshore Drilling Northeast Australia

    IODP EXPEDITION 325 SCIENTISTS

        page: 1-127   2010.8

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    Language:English  

  26. Deep zooxanthellate corals in the Ryukyu Islands: insight from modern and fossil reefs

    HUMBLET, M., FURUSHIMA. Y., IRYU, Y., and TOKUYAMA, H.

    Proceedings of the 27th IAS meeting of Sedimentologists (September 20-23, 2009, Alghero, Italy)     page: 129-133   2009.12

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  27. Magnetic susceptibility evolution and sedimentary environments on carbonate platform sediments and atolls, comparison of the Frasnian from Belgium and from Alberta, Canada Reviewed

    DA SILVA, A-C, POTMA, K., WEISSENBERGER, J., WHALEN, M., HUMBLET, M., MABILLE, C., and BOULAIN, F.

    Sedimentary Geology   Vol. 214   page: 3-18   2009.2

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    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

  28. Variations in Pleistocene coral assemblages in space and time in southern and northern Central Ryukyu Islands, Japan Reviewed

    HUMBLET, M., IRYU, Y., and NAKAMORI, T.

    Marine Geology   Vol. 259   page: 1-20   2009.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (bulletin of university, research institution)  

  29. Quaternary reef development in Okinawa-jima, Ryukyu Islands, southwestern Japan

    IRYU, Y., YAMAMOTO, K., HUMBLET, M.

    Field Excursion Guidebook, 17th International Sedimentological Congress     page: 1-24   2006.7

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    Language:English  

  30. Reconstructing atoll-like mounds from the Frasnian of Belgium Reviewed

    BOULVAIN, F., CORNET, P., DA SILVA, A-C., DELAITE, G., DEMANY, B., HUMBLET, M., RENARD, M., and COEN-AUBERT M.

    Facies   Vol. 50 ( 2 ) page: 313-326   2004.8

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  31. Nd and Pb isotope signatures of the clay-fraction of Labrador Sea sediments during the Holocene: implications for the inception of the modern deep circulation pattern Reviewed

    FAGEL, N., HILLAIRE-MARCEL, C., HUMBLET M., BRASSEUR, R., WEIS, D., and STEVENSON, R.

    Paleoceanography   Vol. 19 ( 3 ) page: PA3002   2004.7

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    Language:English   Publishing type:Research paper (bulletin of university, research institution)  

  32. Sedimentology of the Bieumont Member: influence of the Lion Member carbonate mounds (Frasnian, Belgium) on their sedimentary environment Reviewed

    HUMBLET, M. and BOULVAIN, F.

    Geologica Belgica   Vol. 3 ( 1/2 ) page: 97-118   2001.1

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Presentations 38

  1. Meta-analysis of Holocene reef growth dynamics in Japan

    Ono, S., Humblet. M., Iryu, Y., and Yokoyama, Y.

    24th Annual Conference of the Japanese Coral Reef Society (Virtual)  2021.11.28  Japanese Coral Reef Society

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    Event date: 2021.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:Virtual  

  2. Study of late Middle Pleistocene reef growth history and relative sea-level change in Okinawa, Ryukyu Islands, Japan. International conference

    Tomatsu. R., Humblet. M., Fujita, K., Kouketsu, Y., and Iryu, Y.

    14th International Coral Reef Symposium (ICRS) Virtual  2021.7.19  International Coral Reef Society

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    Event date: 2021.7

    Language:English   Presentation type:Poster presentation  

    Venue:Virtual  

  3. Last Interglacial coral records of Aldabra and Assumption islands, Republic of Seychelles International conference

    Humblet. M., Camoin, G., Braga, J.C., Jorry, S., Vella, C., Hallmann, N., Jouet, G., and Rovere

    14th International Coral Reef Symposium (ICRS) Virtual  2021.7.19  International Coral Reef Society

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    Event date: 2021.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Virtual  

  4. ROV and AUV seafloor imaging at mesophotic depths in the South Ryukyus, Japan International conference

    Humblet, M., Maki, T., Furushima, Y., Noguchi, Y., Horimoto, H., Sakamaki, T., Ito, S., and Suzuki, S.

    14th International Coral Reef Symposium (ICRS) Virtual  2021.7.19  International Coral Reef Society

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    Event date: 2021.7

    Language:English   Presentation type:Poster presentation  

    Venue:Virtual  

  5. Wide area seafloor imaging by a low cost AUV International conference

    NOGUCHI, Y., SAKAMAKI, T., ITO, S., HUMBLET, M., FURUSHIMA, Y., and MAKI, T.

    Global Oceans 2020  Oceanic Engineering Society

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    Event date: 2020.10

    Language:English   Presentation type:Oral presentation (general)  

  6. Spatio-temporal variations in fossil coral assemblages in late Middle Pleistocene limestones of the Minatogawa Formation, southern Okinawa-jima, Japan International conference

    TOMATSU, H., HUMBLET, M., FUJITA, K., KOUKETSU, Y., and IRYU, Y.

    JpGU-AGU Joint Meeting 2020  JpGU-AGU

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    Event date: 2020.5

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  7. Study of macrobenthic community structure at mesophotic depths in the South Ryukyus based on ROV and AUV seafloor imaging.

    HUMBLET, M., MAKI, T., FURUSHIMA, Y., NOGUCHI, Y., HORIMOTO, H., YATAGAI, H., SAKAMAKI, T., ITO, S. and SUSUKI, S.

    Japanese Geoscience Union Meeting 2019  Japanese Geoscience Union

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    Event date: 2019.5

    Language:English   Presentation type:Poster presentation  

    Venue:Makuhari Messe  

  8. Coral-based paleoenvironmental interpretation and depositional history of the late middle Pleistocene Minatogawa Formation, southern Okinawa-jima, Japan.

    TOMATSU, H., HUMBLET, M. and FUJITA, K.

    Japanese Geoscience Union Meeting 2019  Japanese Geoscience Union

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    Event date: 2019.5

    Language:English   Presentation type:Poster presentation  

    Venue:Makuhari Messe   Country:Japan  

  9. Fossil coral assemblages of the late middle Pleistocene Minatogawa Formation, southern Okinawa-jima, Japan.

    HUMBLET, M. and FUJITA, K.

    Japanese Geoscience Union Meeting 2018  Japanese Geoscience Union

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    Event date: 2018.5

    Language:English   Presentation type:Poster presentation  

    Venue:Makuhari Messe   Country:Japan  

  10. ROV and AUV exploration of the mesophotic reef zone around the Sekisei Lagoon, South Ryukyus, Japan

    HUMBLET, M., MAKI, T., FURUSHIMA, Y., NOGUCHI, Y., KURANAGA, K., SAKAMAKI, T., ITO, S., AND YOSHIGA, S.

    20th Annual Conference of the Japanese Coral Reef Society  

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    Event date: 2017.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  11. A remarkable fossil Heliopora coerulea community from the Pleistocene Minatogawa Formation, southern Okinawa-jima, Japan.

    HUMBLET, M. and FUJITA, K.

    20th Annual Conference of the Japanese Coral Reef Society 

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    Event date: 2017.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Tokyo institute of Technology, Tokyo   Country:Japan  

  12. Rising sea level and reef response in Bora Bora, Society Islands, South Pacific (French Polynesia) International conference

    GISCHLER, E., ISAACK, A., HUDSON, H., ANSELMETTI, F., HUMBLET, M., EISENHAUER, A., AND CAMOIN, G.

    13th International Coral Reef Symposium (ICRS) 

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    Event date: 2016.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Honolulu, Hawaii   Country:United States  

  13. Coral successions in the Great Barrier Reef during glacial-interglacial cycles International conference

    HUMBLET, M. AND WEBSTER, J.M.

    13th International Coral Reef Symposium (ICRS) 

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    Event date: 2016.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  14. The evolution of the Great Barrier Reef over the past 30 ka: new insights from IODP Expedition 325 International conference

    WEBSTER, J.M., BRAGA, J.C., HUMBLET, M., POTTS, D.C., IRYU, Y., YOKOYAMA, Y., FUJITA, K., BOURILLOT, R., ESAT, T., FALLON, S., THOMPSON, W.G., THOMAS, A.L., KAN, H., MCGREGOR, H., AND HINESTROSA, G.

    13th International Coral Reef Symposium (ICRS) 

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    Event date: 2016.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Honolulu, Hawaii   Country:United States  

  15. A new spatio-temporal record of bioerosion in deglacial fossil reef sequences from IODP Expedition 325 cores, Great Barrier Reef, Australia International conference

    PATTERSON, M.A., WEBSTER, J.M., HUTCHINGS, P., HUMBLET, M., BRAGA, J.C., AND YOKOYAMA, Y.

    13th International Coral Reef Symposium (ICRS) 

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    Event date: 2016.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  16. Quantifying bioerosion traces in deglacial fossil reef sequences: spatio-temporal patterns from IODP Expedition 325 cores, Great Barrier Reef, Australia International conference

    PATTERSON, M.A., WEBSTER, J.M., HUTCHINGS, P., HUMBLET, M., BRAGA, J.C., AND YOKOYAMA, Y.

    19th Congress of the International Union for Quaternary Research (INQUA) 

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    Event date: 2015.7 - 2015.8

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  17. Variations in coral assemblages and Late Quaternary environmental changes in the Great Barrier Reef of Australia: data from onshore and offshore drilling International conference

    HUMBLET, M. AND WEBSTER, J.M.

    19th Congress of the International Union for Quaternary Research (INQUA) 

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    Event date: 2015.7 - 2015.8

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

    Tropical coral reefs are restricted to the photic zone and are therefore particularly exposed to Quaternary sea level changes. The Great Barrier Reef of Australia (GBR), the largest and most diverse reef ecosystem in the world, was affected by multiple cycles of glacioeustatic sea level rises and falls. A combination of scientific coring studies, bathymetric and seismic surveys, have shown that the GBR periodically developed on the continental shelf during relative sea level highstands (HST reefs) and was restricted to the shelf edge during glacial sea level lowstands and subsequent deglaciations (LST-DGL reefs). Information on the HST reefs comes mainly from two deep boreholes drilled in 1995 in Ribbon Reef 5 (RR5) and Boulder Reef (BR) in the northern GBR (International Consortium for GBR drilling). The RR5 borehole (210 m) is located near the shelf edge whereas the BR borehole (86 m) was drilled further inshore in a protected muddy inner shelf reef 15 km from the coast. Webster and Davies (2003) identified several stacked reef generations and suggested the timing of the GBR initiation occurred at 452-365 ka. More recently, 34 boreholes were drilled into LST-DGL reefs, now submerged, along four transects at three localities along the shelf edge of the GBR (IODP Expedition 325, Webster et al., 2011): Hydrographers Passage (HYD-01C and HYD-02A), Noggin Pass (NOG-01B), and Ribbon Reef (RIB-02A). Here we integrate the coral data from all these boreholes to provide a full picture of the evolution of coral communities in the GBR during multiple cycles of sea level changes and to identify the factors controlling the coral community structure of the GBR during the Late Quaternary.

  18. Response of the Great Barrier Reef to sea level and environmental changes over the past 30 ka International conference

    WEBSTER, J.M., BRAGA, J.C., HUMBLET, M., POTTS, D.C., IRYU, Y., YOKOYAMA, Y., FUJITA, K., BOURILLOT, R., ESAT, T., FALLON, S., THOMPSON, W.G., THOMAS, A.L., KAN, H., MCGREGOR, H., AND HINESTROSA, G.

    19th Congress of the International Union for Quaternary Research (INQUA) 

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    Event date: 2015.7 - 2015.8

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  19. Sea level record obtained from submerged the Great Barrier Reef coral reefs for the last 30 ka International conference

    YOKOYAMA, Y., ESAT, T., THOMPSON, W.G., THOMAS, A.L., WEBSTER, J.M., MIYAIRI, Y., SAWADA, C., AZE, T., MATSUZAKI, H., OKUNO, J., FALLON, S., BRAGA, J.C., HUMBLET, M., IRYU, Y., POTTS, D.C., FUJITA, K., SUZUKI, A., AND KAN, H.

    19th Congress of the International Union for Quaternary Research (INQUA) 

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    Event date: 2015.7 - 2015.8

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  20. Late Quaternary development of barrier and fringing reefs of Bora Bora, Society Islands, South Pacific: the influence of subsidence, sea level, and antecedent topography International conference

    GISCHLER, E., ISAACK, A., HUDSON, H., ANSELMETTI, F., HUMBLET, M., EISENHAUER, A., AND CAMOIN, G.

    The 31th annual meeting of the International Association of Sedimentologists 

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    Event date: 2015.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Poland  

  21. Last glacial to deglacial biotic changes on the Great Barrier Reef from offshore boreholes

    HUMBLET, M., WEBSTER, J.M., BRAGA, J.C., IRYU, Y., POTTS, D.C., YOKOYAMA, Y., ESAT, T., FALLON, S., THOMPSON, W.G., AND THOMAS, A.L.

    Japanese Geoscience Annual Meeting 

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    Event date: 2015.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

    IODP Expedition 325 drilled 34 boreholes into submerged reef structures along the shelf edge of the Great Barrier Reef (GBR). The boreholes were drilled between 42 and 167 mbsl at 17 sites along four transects at three geographic locations (Hydrographers Passage, Noggin Pass, and Ribbon Reef). The last glacial to deglacial reef sequence (~8 ka to ~27 ka) varies in thickness from ~5.5 m to ~34 m and consists primarily of coralgal boundstone with various proportions of microbialite. We use a detailed chronostratigraphic scheme based on numerous C14 and U-Th ages to discuss the evolution of the coralgal communities since the last glaciation. Exp. 325 cores show that different phases of sea level change promoted different shallow reef-building coral species at the study sites. The onset of the deglacial (16-19 ka) is characterized by a peak abundance of Seriatopora and Tubipora whereas the following rapid sea level rise (<16 ka) is marked by the dominance of massive Isopora and Acropora with medium- to robust-size branches. The shift in composition of coral communities around 16 ka coincides with the flooding of a pre-LGM MIS2 reef terrace, an event which had a major influence on reef growth and reef composition. We discuss the impact of this event on coralgal communities in the GBR and its significance for Quaternary reef evolution in general.

  22. Response of reef corals to late Quaternary climate changes in the Great Barrier Reef: the Ribbon Reef 5 and Boulder Reef drill cores revisited

    HUMBLET, M. AND WEBSTER, J.M.

    Meeting of the Japanese Geological Society 

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    Event date: 2014.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

    The Great Barrier Reef (GBR) of Australia is the largest and most diverse reef ecosystem in the world. Coral cover declined significantly in recent years due to a combination of biological and climatic factors (De'ath et al., 2012). Yet, the GBR as a whole displayed a remarkable resilience during glacial-interglacial cycles, repeatedly reestablishing itself after multiple episodes of emersion (Webster and Davies, 2003). But the particular response of coral communities to Quaternary climate changes remains poorly documented. In an attempt to understand how coral communities responded to long-term natural perturbations, we reexamine two deep boreholes drilled in 1995 in the Ribbon Reef 5 (RR5) and Boulder Reef (BR) at latitude 15°24' S in the northern GBR (International Consortium for GBR drilling). The RR5 core (210 m) is located near the shelf edge 50 km off the Queensland coast and is directly exposed to the ocean swell. The BR core (86 m) was drilled further inshore in a protected muddy inner shelf reef only 15 km from the coast. Webster and Davies (2003) have used the RR5 core to constrain the age of the GBR inception to 452-365 ka (MIS 11) and reported two recurrent coral assemblages in this core and another distinct assemblage in the BR core. However, the details of the coral succession in these cores have not been fully investigated yet. Here we present an in-depth analysis of the variations in coral assemblages in the RR5 and BR cores during the entire history of the GBR. Our aim is to (1) document the initial phase of colonization, (2) evaluate the similarity in taxonomic composition between successive reef-building episodes, (3) examine the influence of terrigenous input on coral communities and their evolution, and (4) compare the coral record of the RR5 and BR cores with that of the IODP 325 cores drilled in submerged reefs along the shelf edge of the modern GBR (Webster et al., 2011).

  23. Geological significance of the mesophotic reef zone: example from the Sekisei Barrier Reef

    Marc Humblet, Yasuo Furushima, Toshihiro Maki, and Yasufumi Iryu

    Meeting of the Japanese Geological Society 

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    Event date: 2014.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

    Reef corals and other benthic reef organisms, such as coralline algae, exhibit a non-random distribution along gradients of wave energy and light, i.e. reef zonation (Done, 1983). Fossil reef communities can therefore be used for paleoenvironmental and sea level reconstructions (Montaggioni and Braithwaite, 2009). However, our understanding of the present-day distribution of reef organisms is mostly limited to the shallower reef ecosystem (0-30 m). The deeper reef ecosystem, from 30 m to the bottom of the photic zone, i.e. the mesophotic reef zone, remains largely unexplored. From a biological viewpoint, the mesophotic reef zone is interesting because its exploration can lead to the discovery of new species (Petrescu et al., 2014). It has also an important ecological significance because it marks the transition between photic and non-photic ecosystems. Furthermore, the mesophotic reef zone has been considered a possible refuge for shallow-water species in times of environmental stress (Bongaerts et al., 2010). From a geological viewpoint, the importance of the mesophotic reef zone is twofold: (1) mesophotic reef organisms can be potentially useful paleoenvironmental and sea level indicators, and (2) the seafloor topography in the mesophotic reef zone is the product of the interplay between erosion and reef growth, controlled by eustatic sea level changes, subsidence and uplift.
    In 2004 and 2005, video images of the seafloor acquired by a small remotely operated vehicle (ROV) near the Sekisei Lagoon indicate the presence of distinct macrobenthic communities at depths of 30 to 120 m exhibiting a non-random distribution along a depth gradient (Furushima et al., 2005; Humblet et al., 2009). In addition, high-resolution bathymetric data have brought to light a number of interesting topographic features: a ridge and furrow system, gentle slopes and steep escarpments, prominent pinnacles, and mound-like structures. The variety of habitats and associated biota makes the forereef slope of the Sekisei barrier reef an ideal site for conducting a detailed study of the mesophotic reef zone and explore the relationship between seafloor topography and past sea level changes in this region.

  24. Changes in coral assemblages in the Great Barrier Reef since the last glaciation

    HUMBLET, M., POTTS, D.C., WEBSTER J.W., YOKOYAMA, Y. AND IODP EXPEDITION 325 SCIENTISTS

    Japanese Geoscience Annual Meeting 

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    Event date: 2013.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

    Drilling into submerged reef structures along the shelf edge of the Great Barrier Reef was carried out during IODP Expedition 325 with the purpose of reconstructing sea level and environmental changes since the Last Glacial Maximum (LGM) and analyzing their impact on reef communities and reef growth. A total of 34 boreholes were drilled between 42 and 167 mbsl at 17 sites along four transects at three geographic locations (Hydrographers Passage, Noggin Pass, and Ribbon Reef). Two basic chronostratigraphic units can be recognized: a last glacial to deglacial reef sequence overlying older Pleistocene reefal and non-reefal deposits. The former varies in thickness from ~5.5 m to ~34 m and consists primarily of coralgal boundstone with various proportions of microbialite. In this study we analyze the variations in coral assemblages since the last glaciation. Exp. 325 cores show that diverse corals, including Faviids, Acropora, Montipora, and Porites, were growing during the last glacial period on the shelf edge. Their distribution was limited to the most distal boreholes during the LGM lowstand. The subsequent deglaciation saw the development of a shallow-water coral assemblage dominated by encrusting to massive Isopora and branching Acropora and Seriatopora as sea level rose. The tops of distal boreholes are marked by a shift to deeper assemblages dominated by encrusting Porites and Montipora reflecting reef drowning and the formation of submerged reef terraces. As sea level kept rising, a shallow-water Isopora-dominated assemblage re-established further upslope and formed a barrier reef before drowning in turn.

  25. Biodiversity of upper mesophotic coral community in Okinawa

    SINNIGER, F., HUMBLET, M., AND HARII, S.

    Japanese Geoscience Annual Meeting 

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    Event date: 2013.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

    Mesophotic coral ecosystems (MCEs) are usually found at depth ranging from 30 to over 100 m depth. Mesophotic coral communities are often composed of both eurybathic tolerant species and species adapted to specific condition of the mesophotic zone. The taxonomic composition of such communities is still poorly known, yet important to conduct accurate paleoenvironmental interpretations of fossil reef deposits, especially in studies aiming to reconstruct past sea-level changes. Moreover, from a biological perspective, the Deep Reef Refugia Hypothesis (DRRH) states that mesophotic coral ecosystems, due to their more stable environmental conditions, may act as refugia for shallow water species to survive extreme climatic events and re-colonise shallower reefs in the future.
    Recent global environmental changes affected seriously shallow coral reefs around Okinawa. The combination of major bleaching events and several typhoons lead to changes in coral communities with some species apparently extinct from several locations. Around Sesoko Island in the northern part of Okinawa, several corals species disappeared since 1999 and were not recorded since then (van Woesik et al. 2011). Seriatopora hystrix was one of those species.
    During the recent survey of a mesophotic coral ecosystem located between Sesoko Island and Motobu Peninsula, high coral diversity and dense communities were found between 35 and 55 m depth including abundant populations of S. hystrix between 39 and 47 m. In order to estimate the coral biodiversity as well as the relationships between shallow and mesophotic corals, several genetic markers, both nuclear and mitochondrial, were sequenced for the samples collected. Symbiotic dinoflagellates were also identified. Here we will present the results of the molecular analyses showing the important coral diversity in this location. Our results also show intraspecific diversity within the population of S. hystrix. The genotypes of those deep populations correspond to genotypes previously observed from shallower reefs as well as to new genotypes. Such results suggest an absence of vertical structuring in Okinawan S. hystrix populations and support the (DRRH). In the future, and if shallow environmental conditions become suitable again for this species, deep populations of S. hystrix might be of critical importance for the re-colonisation of shallow coral reefs.
    Reference: van Woesik R, Sakai K, Ganase A, Loya Y (2011) Revisiting the winners and the losers a decade after coral bleaching. Mar Ecol Prog Ser 434: 67-76

  26. Mesophotic Montipora from Kikai-jima

    Marc Humblet, Matsuda H., Sasaki K., Machiyama H., and Iryu Y.

    Japanese Coral Reef Society annual meeting 

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    Event date: 2012.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

    In August 2009, dredging operations were carried out ~8 km southwest of Kikai-jima with the main objective of finding fossil reef material (RV Tansei-maru cruise KT-09-16). Seafloor material was collected along 14 transects (~200 to ~600 m in length) at depths ranging from 60 to 140 m (edge of the island shelf). Most of the material recovered consisted of macroids, coral gravels (thickly encrusted and bioeroded), and bryozoan-rich calcareous sand (at the deepest site). Live material consisted mainly of soft corals, gorgonians, and sponges. Thirteen live coral colonies were collected between 70 to 80 m water depth. Among these corals, ten belong to the genus Montipora, two to the genus Leptoseris, and one to the genus Echinophyllia. All colonies are a few centimeters across (max width of 11 cm), very thin (1 to 6 mm), and laminar with free margins. We provide a detailed description of the macro- and micromorphology of Montipora colonies based on optical and SEM imaging. Despite the limited number of colonies studied, analysis of morphological features such as corallite diameter, inter-corallite distance, spinule density and shape, shows that at least two morphological types can be distinguished. We compare the morphological characteristics of the recovered mesophotic Montipora with those of shallow species described in the literature.

  27. Changing Coral Assemblages Since The Last Glacial Maximum: IODP Expedition 325 International conference

    Marc Humblet, Don C. Potts, Jody M. Webster, and IODP Expedition 325 scientists

    12th International Coral Reef Symposium 

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    Event date: 2012.7

    Language:English   Presentation type:Oral presentation (general)  

    Country:Australia  

    Major goals of the Integrated Ocean Drilling Program (IODP) Expedition 325 (GBREC: Great Barrier Reef Environmental Changes) include reconstructing histories of sea-level change, sea surface temperature variation and reef growth since the Last Glacial Maximum (LGM), and analyzing responses of reef-building corals to post-glacial sea-level rise. Cores were extracted from submerged reef structures along four transects in three localities on the shelf margin, seaward of the modern Great Barrier Reef. 225 m of drill-core were retrieved from 34 holes at 17 sites in depths from 42 to 167 m below present sea level, and from 1.5 to 42 m below the sea floor.
    Seven coral assemblages are defined, based on taxonomic and morphological compositions. Their paleoenvironments, by analogy with modern reefs, range from shallow wave-exposed to deep low-energy reef habitats. The initial post-glacial reef assemblage is dominated by shallow-water massive-submassive-branching Isopora with branching Acropora and thin branching Seriatopora. The deeper assemblages consist mainly of encrusting to submassive Montipora and encrusting Agariciidae. Horizontal differences between proximal and distal cores along transects probably reflect changing geomorphological and hydrodynamic regimes across the reef tract as sea level rose. Vertical changes in coral assemblages within a core reflect deepening of the water, leading to ultimate drowning of the coral community and creation of the tops of the submerged reef structures. As sea level rose, shallow reef assemblages re-established further upslope and accumulated several meters of reef structure before drowning in turn.



  28. Response of reef-building corals to post-glacial sea level rise: IODP Expedition 325

    Marc Humblet, Don C. Potts, Jody M. Webster, Yusuke Yokoyama, and IODP Expedition 325 scientists

    Japan Geoscience Union annual meeting 

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    Event date: 2012.5

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

    Major objectives of the Integrated Ocean Drilling Program (IODP) Expedition 325 (GBREC: Great Barrier Reef Environmental Changes) include reconstructing histories of sea-level change, sea surface temperature variation and reef growth since the Last Glacial Maximum (LGM), and analyzing the responses of reef-building corals to post-glacial sea level rise. Submerged reef structures were drilled along four transects in three localities (Hydrographers Passage, Noggin Pass, and Ribbon Reefs) on the shelf edge seaward of the modern Great Barrier Reef. A total of 34 boreholes were cored at 17 sites ranging in depth from 42 to 167 meters below present sea level.
    Seven coral assemblages are identified based on coral taxonomy and morphologies. Their paleoenvironments are inferred by comparison with modern coral communities of the Great Barrier Reef and range from shallow wave-exposed to deep low-energy reef habitats. The initial post-glacial coral assemblage is dominated by shallow-water massive-submassive-branching Isopora associated with branching Acropora and Seriatopora. The deeper assemblages consist mainly of encrusting to submassive Montipora and encrusting Agariciidae. Horizontal changes in coral assemblages along transects, from proximal to distal cores, probably reflect the changing reef geomorphology and hydrodynamic regime during sea level rise. Vertical changes within a core reflect an increase in water depth followed by a drowning of the coral community and the formation of the submerged reef tops. As sea level rose, shallow reef assemblages re-established further upslope and accumulated several meters of reef structure before drowning in turn.

  29. The deep photosynthetic reef ecosystem in the Ryukyu Islands

    Humblet, M., Furushima, Y., Yamamoto, H., Maruyama, T., Matsuda, H., Sasaki, K., Machiyama, H., Iryu Y., and Tokuyama, H.

    12th annual meeting of the Japanese Coral Reef Society 

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    Event date: 2009.11

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  30. Deep photosynthetic corals in the Ryukyu Islands: insight from modern and fossil reefs International conference

    Humblet, M., Furushima, Y., Iryu, Y. and Tokuyama H.

    27th annual meeting of the International Association of Sedimentologists 

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    Event date: 2009.9

    Language:English   Presentation type:Poster presentation  

    Country:Italy  

  31. Spatial and temporal variations in Pleistocene coral assemblages in the South and Central Ryukyu Islands

    Humblet, M. and Iryu, Y.

    115th Annual Meeting of the Geological Society of Japan 

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    Event date: 2008.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  32. Responses of Pleistocene coral communities to sea-level changes in the Ryukyu Islands

    Humblet, M. and Iryu, Y.

    9th Annual Meeting of the Japanese Coral Reef Society 

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    Event date: 2006.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  33. Variations of Pleistocene coral community structure in response to sea level change in the Ryukyu Islands International conference

    Humblet, M. and Iryu, Y.

    21 COE International Symposium: Climate Change: Past and Future 

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    Event date: 2006.11

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  34. Variations of Pleistocene coral community structure in response to sea level change in the Ryukyu Islands International conference

    Humblet, M. and Iryu, Y.

    SEALAIX06: Sea level changes: records, processes and modelling 

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    Event date: 2006.9

    Language:English   Presentation type:Poster presentation  

    Country:France  

  35. Variations of Pleistocene coral community structure in response to sea level change in the Ryukyu Islands International conference

    Humblet, M. and Iryu. Y.

    17th International Sedimentological Congress 

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    Event date: 2006.8 - 2006.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  36. Evolution of the Nd and Pb isotopic signatures in deep Labrador Sea clay during the Holocene: implications on deep ocean circulation in the North Atlantic International conference

    Marc Humblet

    EGS-AGU-EUG Joint Assembly 

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    Event date: 2003.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:France  

  37. Nd and Pb isotope signatures of the clay-size fraction of Labrador Sea sediments during the Holocene: Implications for the inception of modern deep circulation pattern

    Brasseur., R., Humblet, M., Hillaire-Marcel, C., and Fagel, N

    3rd VLIZ Young Marine Scientist Day 

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    Event date: 2003.2

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  38. Influence des monticules carbonatés du Membre du Lion (Frasnien, Belgique) sur leur environnement.

    HUMBLET, M.

    Geologica Belgica Junior meeting 

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    Event date: 2000.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Belgium  

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KAKENHI (Grants-in-Aid for Scientific Research) 3

  1. Reconstruction of late Quaternary sea-level and reef growth history in the Ryukyu Islands

    Grant number:21H01169  2021.4 - 2024.3

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\18200000 ( Direct Cost: \14000000 、 Indirect Cost:\4200000 )

  2. Study of reef biota and sediment distribution in the South Ryukyus and application to paleoenvironmental interpretation of Quaternary fossil reef deposits

    Grant number:18K03824  2018.4 - 2021.3

    HUMBLET Marc

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    Authorship:Principal investigator 

    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    During FY2019 the present research project focused on the description and interpretation of Quaternary fossil coral assemblages in the Ryukyu Islands based on examination of both outcrops and cores.
    Outcrops of late Middle Pleistocene coral limestones were examined at Horikawa quarry, southern Okinawa-jima, in October 2019. This study is part of a Nagoya Univ. student’s Master thesis and is conducted in collaboration with Prof. Kazuhiko Fujita (Univ. of the Ryukyus). The purpose of this study is to reconstruct the depositional history of the limestones of the late Middle Pleistocene Minatogawa Formation based on our understanding of the distribution of modern biota and sediments in the Ryukyu Islands. A detailed description of the coral species taxonomic and morphologic compositions of the limestones was carried out. Samples were collected for taxonomic and sedimentological analyses. Data from the four transects combined with those of previous surveys suggest a sea-level history more complex than previously thought.
    In addition, the description of five cores taken from Kodakara-jima, South Ryukyus, began in July 2019. The cores were drilled by the COREF project and are now stored at the Kochi Core Center. The purpose of this study is to examine the responses of high-latitude coral communities to sea-level and environmental changes during the various stages of Holocene reef development.
    In parallel to the aforementioned studies, analysis of the video images of mesophotic seafloor acquired along the margins of the Sekisei Lagoon, South Ryukyus, during past surveys is ongoing.
    The study of the COREF cores is slightly delayed due to additional time spent on the investigation of outcrops of Pleistocene coral limestones in southern Okinawa-jima.
    The following research activities related to the present project are expected to take place during FY2020:
    (1) The study of the cores from Kodakara-jima will continue this year. This is now the main theme of a Master thesis at Nagoya University. The description of the cores will be carried out at the Kochi Core Center.
    (2) An additional field survey in Southern Okinawa-jima targeting the limestones of the Minatogawa Formation is being planned. The survey will focus on stratigraphic intervals which have not yet been studied in detail.
    (3) One more survey of the modern mesophotic seafloor around the Sekisei Lagoon using robotic submersibles (i.e., ROV, AUV) will be scheduled in order to complement the existing data base on the distribution of biota and sediments at mesophotic depths around the Sekisei Lagoon.
    (4) A fossil mesophotic reef sequence sampled by IODP Exp. 325 will be examined at the Kochi Core Center to study the response of mesophotic coral communities to rapid deglacial sea-level rise.

  3. AUV exploration of the mesophotic reef zone in the South Ryukyu Islands

    Grant number:16K17819  2016.4 - 2018.3

    Humblet Marc

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    Authorship:Principal investigator 

    Grant amount:\4030000 ( Direct Cost: \3100000 、 Indirect Cost:\930000 )

    The mesophotic seafloor around the Sekisei Lagoon was surveyed at two sites: site KT (lat. 24.27°, long. 124.08°; 30-110 m), site TN (lat. 24.35°, long. 124.08°; 30-45 m), using robotic submersibles. A new autonomous underwater vehicle (AUV HATTORI) was developed to acquire high-resolution video images of the seafloor. The AUV was equipped with sensors measuring temperature, salinity, and light intensity down to 45 m at both sites. Additional video images were acquired using remotely operated vehicles.
    There are differences in coral communities occurring at upper mesophotic depths (30-40 m) between site KT and site TN: low coral cover and taxa comprising Porites and merulinids at site KT, and high coral cover with abundant Leptoseris and Acropora at site TN. In addition, a clear depth zonation was observed at site KT with a transition from coralgal communities to a mixed community at around 60 m. This study also highlights the patchiness of benthic communities at mesophotic depths.

 

Teaching Experience (On-campus) 5

  1. Environmental Earth Sciences

    2014

  2. Earth and Planetary Sciences

    2013

  3. Fundamentals of Earth Science II

    2012

  4. First Year Seminar A

    2011

  5. Fundamentals of Earth Science I

    2011

 

Social Contribution 2

  1. Fossil Coral Reefs as a Window into the History of Climate Change

    Role(s):Lecturer

    NU-MIRAI Education Project   NU-MIRAI Education Project Workshop  2021.10

  2. Fossil Coral Reefs as a Window into the History of Climate Change

    Role(s):Lecturer

    NU-MIRAI Education Project  NU-MIRAI Education Project Online Lectures  2020.8