Japanese

■□■2015.3.19

New book Chapter has been published: Fujita and Hongo (2015).

■□■2015.2.22

New paper has been published: Reimer et al (2015) Marine Pollution Bulletin

Name：Chuki Hongo Ph.D.

Position：Research Fellow

Affiliation：Wakayama Prefectural Nanki Kumano Geopark Center

Address：2838-3 Shionomisaki, Kushimoto-cho, Wakayama 649-3502, JAPAN

e-mail address: hongo_c0001(at)pref.wakayama.lg.jp

2009. 3： Ph.D (Department of Earth and Planetary Sciences, The University of Tokyo)

2009.4～2011.4： Research Fellow, The University of Tokyo

2011.5～2012.3：Research Associate, National Institute for Environmental Studies

2012.4～2015.3：JSPS Research Fellow, University of the Ryukyus

2015.4～2019.3： Research Fellow, University of the Ryukyus

2019.4～present： Wakayama Prefecture (Wakayama Prefectural Nanki Kumano Geopark Center)

My major researches is to reconstruct paleo-reefecology and -ocean environments during the Quaternary, to evaluate coral reefs in present day, and to project coral reef ecosystem near future, influenced by ongoing anthropogenic impacts and global climate changes.

My research is based on sedimentological and paleontological approaches for boring cores and raised reef terraces, and ecological analysis of quantitative data about present coral reef. I spend much time on fieldworks for research carrier in graduate school days. My major fieldworks are to obtain boring sample of reefs and specimen about corals in shallow reef and raised reef terraces and to investigate ecological and biological feature in coral reefs.

Ongoing four projects are the following:

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Project 1: Reconstruction of paleo reef ecology

Aims of this project:

Coral reef and its species diversity have shown great losses worldwide, influenced by recent climate change and human impact: e.g., increased sea-surface temperature, ocean acidification, super hurricane, outbreak of Acanthaster planci, and increased sediment runoff (e.g., Hughes et al., 2003; Bruno et al., 2009). Therefore, projection of reef ecosystem in the near future is significance concerns. Various scientific approaches, based on ecology and biology, have employed to study conservation and restoration of coral reefs, leading to the direct transplantation of corals at sites worldwide in recent decades (e.g., Edwards and Clark, 1998). In addition laboratory studies suggested that calcification rate of corals has been projected to decrease when temperature and pCO2 were both elevated (e.g., Reynaud et al., 2003). However, previous studies have reported conflicting results about target species for transplantations (Rinkevich, 2005) and laboratory experiments for the projection of calcification (e.g., Reynaud et al., 2003; Takahashi and Kurihara, 2012); consequently, the optimal coral species for future reef ecosystem remain poorly understood. The geological record of corals is important for projection reef ecosystems response to climate change and anthropogenic stresses near future. Identifying the indicator species that contribute to reef formation and maintain reef ecosystems is of prime interest.

The geological record of corals is important for projection reef ecosystems response to climate change and anthropogenic stresses near future. Identifying the indicator species that contribute to reef formation and maintain reef ecosystems is of prime interest. Recently we indicate that biological and ecological analyses of the Holocene drilling cores in the northwest Pacific, the west Indian Ocean, and the New Caledonia revealed that growth and maintenance of reef ecosystems were controlled by only a few coral species; they are called “key coral species” (Hongo and Kayanne, 2011; Hongo, 2012)

However, little is known of the knowledge with regard to key coral species in other regions (e.g., Hawaii, French Polynesia, Central Pacific, and east Pacific). Therefore, main questions are the following: (1) What is a key coral species in the regions?, (2) Do key coral species have the common ecological strategy?, and (3) Will key coral species enable contribute to reef development and maintenance reef ecosystem in response to environmental changes (e.g., sea-level rise, increased sea-surface temperature, and ocean acidification)?

Colleagues: Prof. Shou-Yeh Gong (Taiwan National Museum of Natural Science, Taiwan), Prof. Chuan-Chou (River) Shen (Taiwan National University, Taiwan), Prof. Lucien F. Montaggioni (University of Provence, France), Prof. Hajime Kayanne (The University of Tokyo, Japan), and Dr. Denis Wirrmann (IRD, New Caledonia and France).

Key words: hermatypic coral, key coral species, sea-level change, increase in SSTs, typhoon, drilling cores, raised reef terraces, 14C dating

Please see: Hongo and Kayanne (2010a, 2011), Hongo (2011 in Japanese), Hongo (2012), Hongo and Wirrmann (2015)

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Project 2: Reconstruction of paleo-ocean environment

Aims of this project:

The importance of Holocene sea-level change has long been a central theme of the Quaternary Science. Holocene sea-level records provide direct evidence of the progress of melting of ice sheet during the Holocene, although the correlation between ice and ocean volumes is incontrovertible the casual link is commonly obscured. Some regional studies of coral-reef sites based on the analysis of boring cores carried out through reef flat to reef slope in present-day reefs and demonstrated long-term (1000 - 10000 years) and large-amplitude (10 - 100 m) of melt water history. However, short-term (<100 years) and small-scale (<1 m) of sea-level changes is that detailed past sea-level records plays as major role for prediction of sea-level fluctuations in the near future are not observed from reef cores.

We now represents the following suggestion to reconstruct high-resolution Holocene sea-level records: (1) Identification of species from boring core samples is effective to reconstruct sea-level change more precisely during the Holocene. (2) Relative abundance data for each species is essential to determine position and course of sea-level curve within envelope about their living depth. (3) The accuracy of reconstruction of sea-level record depends on a distribution pattern of corals; it is need to only use the vertical distribution in present-day reef obtained from the site close to a given boring site. Sea-level curve based on agreement with above requirement is characterized by less fluctuation (±0.5 m–±2.5m) during the Holocene and thus studies on high-resolution sea-level record will provide predictions for the research on spatial and temporal histories of sea-level change to Holocene sciences and management of conservation of land in the near future.

However, we need additional high resolution sea-level records from last glacical stage and identify a source of meltwater.

Colleagues: Prof. Hajime Kayanne (The University of Tokyo).

Key words: hermatypic coral, sea-level change, increase in SSTs, drilling cores, raised reef terraces, peak abundance method, 14C dating

Please see: Hongo and Kayanne (2009, 2010b), Hongo (2010 in Japanese)

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Project 3: Evaluation of present-day and near future coral reefs

Aims of this project:

Coral reefs have been negatively affected by a variety of environmental changes in recent decades (Pandolfi et al 2011). These changes include increasing sea surface temperatures (SSTs), ocean acidification, terrestrial input, and diseases (Fabricius 2005; Hoegh-Guldberg et al 2007). Tropical cyclones also affect coral reefs (Fabricius et al 2008). Key coral species will likely to be affected by these impacts; therefore, it is important to understand of key coral species in response to these impacts, in order to evaluate and project the magnitude of reef formation and species diversity. I focus on the following four environmental factors (1) sea-level rise, (2) SST, (3) terrestrial runoff, and (4) tropical cyclone.

In my previous studies, key coral species have potential to build reefs and maintain ecosystems in the near future under a global sea-level rise of 0.2‒0.6 m until 2099 in the Ryukyu Islands because the species contributed to reef formation in the Ryukyu Islands during the Holocene sea-level rise (Hongo 2012). However, Acropora digitifera (one of key coral species in Ryukyu Islands) and other key coral species had disappeared from turbid reefs on Okinawa Island, affected by multiple disturbances of increased SST in 1998 and 2001 and high turbidity influenced by recent terrestrial runoff, analysis of region-scale coral cover and species abundance (Hongo and Yamano 2013). The coral cover decreased drastically, from 24.4% in 1995 to 7.5% in 2009 (1.1%/year) in the region. Moreover, if intensified tropical cyclones attack reefs at Okinawa Islands in the near future, A. digitifera will be severely damaged (dislodged). Above the finding indicates that these impacts will cause a loss of species diversity in the Ryukyu Islands, as A. digitifera is important reef builder and critical to the maintenance of reef ecosystems (Hongo et al 2012).

I am now continuing to observe a change in abundance of key coral species in response to the environmental changes in Ryukyu Islands. For example, A. digitifera was disappeared in the west coast of Ishigaki Island, as a consequence of factors that elevated SST in 2007 and outbreaks of coral predators such as crown-of-thorns sea stars (Acanthaster planci) from 2010 to 2011.

Colleagues: Dr. Hiroya Yamano (National Institute for Environmental Studies) and Prof. Kazuhiko Fujita (University of the Ryukyus).

Key words: hermatypic coral, foraminifera, increase in SSTs, bleaching, terrestrial runoff, turbidity, database, transect survey

Please see: Hongo (2012), Hongo et al. (2012), Hongo and Yamano (2013)

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Project 4: Coral reef ecosystem-based adaptation to climate change and disaster risk reduction

Aims of this project:

Mega earthquake, tsunami, volcanic eruption, and floods are extreme natural catastrophic events over the world. Moreover, sea-level rise and intensified tropical cyclones, influenced by climate change, will devastate coastal areas in the world. Therefore, we recognize the need for research into the adaptation to the impact of climate change and disaster risk reduction in coastal areas.

The Pacific comprises numerous islands and coral reefs, including fringing reefs, barrier reefs, and atolls. A coral reef consists of distinctly zoned landforms, comprising a reef flat, reef slope, and lagoon. In the Ryukyu Islands, for example, the reef flat is composed of shallow lagoon and reef crest. The shallow lagoon (less than 5 m deep) is situated between the reef crest and the shore. The reef crest, which forms a topographic high along the reef margin, is 100‒300 m wide and is emergent during low tide, and where wave breaking first occurs. Therefore, coral reefs have a role in natural break water.

In addition to the reduction of wave energy, the natural break water contributes to protection of coastal erosion and to reduction of inundation height. However, factors affecting the recent Pacific islands decrease in the abundance and diversity of coral species include elevated SST, ocean acidification, outbreaks of crown-of-thorns sea stars, terrestrial runoff, and coastal development. The negative impacts gradually cause a decline of role in the natural break water. According to the numerical models of global warming at the end of the 21 st century, the mean intensity of tropical cyclones will probably increase significantly in the near future (Tsuboki et al. 2015 GRL). Intensified tropical cyclones will cause increasing of wind speed, wave height, and wave period. Moreover, sea-level rise will cause a decline of effect of reduction of wave energy at reef crests in the near future. Although artificial break water (i.e., concrete break water) at reef coast also contributes to reduction of wave energy, it doesn’t provide habitats for reef-dwelling organisms and it needs construction costs. These imply that it will cause increase of disaster risk at coral reefs. However, scientific knowledge of natural break water of coral reefs in the present-day and the near future in the Pacific islands are poorly understood. Consequently, a policy marker in response to the disaster is also poorly understood.

Colleagues: Associate Prof. Kazuhisa Goto (Tohoku University), Associate Prof. Haruko Kurihara (University of the Ryukyu), Dr. Yimnang Golbuu (Palau Internatinal Coral Reef Center).

Key words: hermatypic coral, super typhoon, wave height, wave energy,and natural break water

Please see: Hongo et al. (2012), Watanabe et al. (in press)

Award

[3] Kawaguti Award for Young Researcher: Japanese Coral Reef Society, 2013.7

[2] Poster Award: 117th annual meeting of the Geological Society of Japan, 2010.9

[1] Poster Award: 118th annual meeting of the Geological Society of Japan, 2011.9

Grant

[14] Hongo C, Iguchi A, and Nakaza E

Pro natura foundation Japan, 700,000 JPY (2014October-2015September)

Title: Risk evaluation of natural break water at Ryukyu Islands under coastal developments

[13] Kurihara H, Harii S, Fujita K, Hongo C, Fujita Y

University of the Ryukyus, 1,686,000 JPY (2014August-2015March)

Title: A Multilateral study of natural break water of coral reefs under climate change

[12] Hongo C and Kiguchi M

Nippon Life Insurance Foundation, 1,300,000 JPY (2013October-2014September)

Title: Evaluation of natural break water of coral reefs affected by super typhoons and application of the results to disaster risk reduction

[11] Hongo C

Sasakawa Grants for Science Fellows (SGSF), 229,000 JPY (2012July-2012September)

Title: Response of key coral species to Holocene sea-level change in the Western Indian Ocean

Goal: esentation and discussion at 12th International Coral Reef Symposium in 2012 at Cairns

[10] Hongo C

JSPS Fellowships for young scientists, 3,600,000 JPY for three year (2012April-2015March)

Title: Projection of coral reef ecosystems based on paleoecological data of coral reefs since last glacial stage

Goal: Projection of coral reef ecosystems influenced by global warming

[9] Hongo C

The Fukada Geological Institute, 500,000 JPY (2011May-2012March)

Title: Reconstruction of coral reef formation from quantitative analysis regarding key species of fossil corals from the drilling core of New Caledonia

Goal: To research sedimentological and ecological analysis about drilling cores from New Caledonia.

[8] Hongo C

The Japan Society for the Promotion of Science (JSPS) and The University of Tokyo, The Institutional Program for Young Researcher Overseas (2010December-2011February)

Title: Coral reefs responce to the global warming: understanding a principle of reef formation.

Goal: To research sedimentological analysis about drilling cores from Indian Ocean (Seychelles, Mayotte, and Madagascar).

[7] Hongo C and Goto K

The Sasakawa Scientific Research Grant from The Japan Science Society, 670,000 JPY (2010April-2011February)

Title: Effects of typhoon on coral reef ecosystems: quantitative evaluation of the coral damages and recoveries

Goal: To research ecological and geomorphological effects of typhoon waves on coral reefs in Ryukyu Islands. I will conduct a field survey at the sites in 2010.

[6] Hongo C

Fujiwara Natural History Foundation, 637,000 JPY (2010March-2011March)

Title: Reconstruction of Holocene coral reef ecosystem from the raised coral reef at Taiwan and Ryukyu Islands

Goal: To research reconstrcuting pristine coral-reef ecosytem from the raised reef at Taiwan and Ryukyu Islands. I will conduct a field survey at the sites in 2010.

[5] Hongo C

Tokyo Geographical Society, 350,000 JPY (2009June-2010June)

Title: Reconstruction of Holocene coral reef ecosystem in the western Pacific

Goal: To research relationship between climate change and reef ecosystem in the western Pacific. I will conduct a field survey at Kikai Island in the Ryukyu Islands in 2009

[4] Hongo C

The University of Tokyo, 150,000 JPY (2008 July)

Title: International research activity 2008

Goal: Presentation and discussion at 11th International Coral Reef Symposium in 2008 at Florida

[3] Hongo C

Japan Coral Reef Society, 200,000 JPY (2008 July)

Title: Attending the 11th International Coral Reef Symposium in 2008

Goal: Presentation and discussion at 11th International Coral Reef Symposium in 2008 at Florida

[2] Kayanne H, Hongo C, Terai M

World Wild Fund for Nature (WWF),408,000 JPY (2007 October - 2008 March)

Title: Research of bleached coral reefs in Shiraho reef, Ryukyu Islands, Japan in 2007

Goal: To research bleached coral reefs in Shiraho reef based on ecological field survey. The report about this project is available.

[1] Kayanne H and Hongo C

University museum, The University of Tokyo, 2,500,000 JPY (2007 April -2010 March)

Title: Construction of database from coral collections in the Museum of The University of Tokyo

Goal: To establish online database about specimens of coral collection in the university museum to explore the geographical distribution of their habitat for understanding of its natural history.

Peer reviewed papers (* Corresponding author)

[32] Nanayama F*, Tsuji T, Yamaguchi T, Kondo Y, Ikeda M, Nakanishi T, Miwa M, Hongo C, Furusawa A, Kuwahata M(2021) Island Arc e12422 doi::https://doi.org/10.1111/iar.12422

[31] Kurihara H*, Watanabe A, Tsugi A, Mimura I, Hongo C, Kawai T, Reimer JD, Kimoto K, Gouezo M, Golbuu Y (2021) Scientific Reports 11:11192 doi:https://doi.org/10.1038/s41598-021-90614-8

[30] Hongo C* and Kiguchi M (2021) Assessment to 2100 of the effects of reef formation on increased wave heights due to intensified tropical cyclones and sea level rise at Ishigaki Island, Okinawa, Japan. Coastal Engineering Journal 63:3, 216-226, doi:10.1080/21664250.2020.1870075

[29] Asami R*, Yoshimura N, Toriyabe H, Minei S, Shinjo R, Hongo C, Sakamaki T, Fujita K (2020) High-resolution evidence for middle Holocene East Asian winter and summer monsoon variations: Snapshots of fossil coral records. Geophysical Research Letters 47:e2020GL088509 doi:https://doi.org/10.1029/2020GL088509

[28] Fujita K*, Sasaki T, Koyano S, Chinen M, Hongo C, Webster JM, Iryu Y (2020) Reefal microbial crusts found in Middle Holocene reef from Okinawa Island, the Ryukyu Archipelago. Galaxea, Journal of Coral Reef Studies 22:9-25 doi:https://doi.org/10.3755/galaxea.22.1_9

[27] Kitano FY, Hongo C, Yara Y, Sugihara K, Kumagai HN, Yamano H* (2020) Data on coral species occurrences in Japan since 1929. Ecological Research 35:975-985. doi:https://doi.org/10.1111/1440-1703.12136

[26] Goto K*, Hongo C, Watanabe M, Miyazawa K, Hisamatsu A (2019) Large tsunamis reset growth of massive corals. Progress in Earth and Planetary Science (PEPS). 6:14. doi:https://doi.org/10.1186/s40645-019-0265-2

[25] Tanaya T*, Watanabe K, Yamamoto S, Hongo C, Kayanne H, Kuwae T (2018)Contributions of the direct supply of belowground seagrass detritus and trapping of suspended organic matter to the sedimentary organic carbon stock in seagrass meadows. Biogeosciences. 15:4033-4045. doi:https://doi.org/10.5194/bg-15-4033-2018

[24] Hongo C*, Kurihara H, Golbuu Y (2018) Projecting of wave height and water level on reef-lined coasts due to intensified tropical cyclones and sea level rise in Palau to 2100. Natural Hazards and Earth System Sciences. 18:669-686. doi:https://www.nat-hazards-earth-syst-sci.net/18/669/2018/

[23] Hongo C*, Kurihara H, Golbuu Y (2018) Coral boulders on Melekeok reef in the Palau Islands: an indicator of wave activity associated with tropical cyclones. Marine Geology. 399:14-22. doi: https://doi.org/10.1016/j.margeo.2018.02.004

[22] Ito M, Mori A, Hongo C, Asami R, Miyairi Y, Yokoyama Y and Fujita F* (2018)Production age, transport and depositional

processes of beach sediments around Sesoko Island (Okinawa, Japan), based on abrasion grades and radiocarbon ages of empty tests of

Baculogypsina sphaerulata (Foraminifera) Journal of the Japanese Coral Reef Society 20:1-20 doi:10.1111/iar.12115

[21] Hongo C*, Lin K, Shen C-C* (2017) Late Holocene reef ecosystem baseline: Field evidence from the raised reef terraces of Kodakara and Kikai Islands, Ryukyu Islands, Japan. Quaternary International. 455:8-17. doi:10.1016/j.quaint.2017.08.054

[20] Watanabe M*, Goto K, Imamura F and Hongo C (2016) Numerical identification of tsunami boulders and estimation of local tsunami size at Ibaruma reef of Ishigaki Island, Japan. Island Arc. 25:316-332.doi:10.1111/iar.12115

[19] Kayanne H*, Aoki K, Suzuki T, Hongo C, Yamano H, Ide Y, Iwatsuka Y, Takahashi K, Katayama H, Sekimoto T, Isobe M (2016) Eco-geomorphic processes that maintain a small coral reef island: Ballast Island in the Ryukyu Islands, Japan. Geomorphology 271:84-93 doi:10.1016/j.geomorph.2016.07.021

[18] Fujita K*, Hongo C, Koutoku M, Ito S, Asami R and Reimer JD (2015) Buried fossil microatolls off the Kaichu-Doro Causeway, between Okinawa and Henza Islands. Fauna Ryukyuana. 24:13-15

[17] Hongo C* and Montaggioni LF （2015) Biogeography of Holocene coral species in the western Indian Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology. 438:51-69, doi: 10.1016/j.palaeo.2015.07.044

[16] Reimer JD*, Yang S-Y, 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.. (2015) Effects of causeway construction on environment and biota of subtropical tidal flats in Okinawa, Japan. Marine Pollution Bulletin 94:153-167 doi:10.1016/j.marpolbul.2015.02.037

[15] Hongo C* and Wirrmann D. (2015) Preliminary identification of key coral species from New Caledonia (Southwest Pacific Ocean), their significance to reef formation, and responses to environmental change. Island Arc 24:31-46 doi:10.1111/iar.12090

[14] Humblet M*, Hongo C, and Sugihara K. (2015) An identification guide to some major Quaternary fossil reef-building coral genera (Acropora, Isopora, Montipora, and Porites). Island Arc 24:16-30, doi:10.1111/iar.12077

[13] Harii S*, Hongo C, Ishihara M, Ide Y and Kayanne H. (2014) Impacts of multiple disturbances on coral communities at Ishigaki Island, Okinawa, Japan, during a 15-year survey. Marine Ecology Progress Series 509:171-180, doi:10.3354/meps10890

[12] Hongo C (2013) A review of effects of super typhoons on coral reef ecosystems: Problem and strategy. Journal of the Japanese Coral Reef Society 15:15-36. (In Japanese),

[11] Hongo C* and Yamano H (2013) Species-specific responses of corals to bleaching events on anthropogenically turbid reefs on Okinawa Island, Japan, over a 15-year period (1995-2009). PLoS ONE8(4): e60952.doi: 10.1371/journal.pone.0060952

[10] Hongo C*, Goto K, Okada K, Yagita Y (2013) Evaluation of echo sounder system for shallow water areas: an example of easy and quick measurement on coral reef, The Quaternary Research 52:43-48 (In Japanese) doi: http://dx.doi.org/10.4116/jaqua.52.43

[9] Kayanne H*, Hongo C, Okaji K, Ide Y, Hayashibara T, Yamamoto H, Mikami N, Onodera K, Ootsubo T, Takano H, Tonegwa M, Maruyama S (2012) Low species diversity of hermatypic corals on an isolated reef, Okinotorishima, in the northwestern Pacific. Galaxea, Journal of Coral Reef Studies 14:73-95 doi: 10.3755/galaxea.14.73

[8] Hongo C*, Kawamata H, Goto K (2012) Catastrophic impact of typhoon waves on coral communities in the Ryukyu Islands under global warming，Journal of Geophysical Research - Biogeosciences 117:G02029, , doi: 10.1029/2011JG001902

[7] Hongo C (2012) Holocene key coral species in the Northwest Pacific: indicators of reef formation and reef ecosystem responses to global climate change and anthropogenic stresses in the near future，Quaternary Science Reviews 35:82-99, doi: 10.1016/j.quascirev.2012.01.011

[6] Hongo C* and Kayanne H （2011) Key species of hermatypic coral for reef formation in the northwest Pacific during Holocene sea-level change, Marine Geology 279:162- 177, doi: 10.1016/j.margeo.2010.10.023

[5] Hongo C （2011) Ploblems and perspectives regarding drilling through coral reefs: the reconstruction of Holocene coral-reef ecosystems, Journal of Geological Society of Japan 117:265-276 (In Japanese), doi: 10.5575/geosoc.117.265

[4] Hongo C* and Kayanne H （2010b) Holocene sea-level record from corals: Reliability of paleodepth indicators at Ishigaki Island, Ryukyu Islands, Japan, Palaeogeography, Palaeoclimatology, Palaeoecology 287:143-151 doi: 10.1016/j.palaeo.2010.01.033

[3] Hongo C* and Kayanne H （2010a) Relation between species diversity and reef growth in the Holocene at Ishigaki Island, Pacific Ocean, Sedimentary Geology 223:86-99, doi: 10.1016/j.sedgeo.2009.10.005

[2] Hongo C （2010) High-resolution Holocene sea-level change based on coral reefs and hermatypic corals, Journal of Geography 119:1-16 (In Japanese) doi: 10.5026/jgeography.119.1

[1] Hongo C* and Kayanne H （2009) Holocene coral reef development under windward and leeward locations at Ishigaki Island, Ryukyu Islands, Japan, Sedimentary Geology 214: 62-73, doi:10.1016/j.sedgeo.2008.01.011

Books

[5] Hongo C* （in press) 「The hydrodynamic impacts of tropical cyclones on coral reefs of Japan: key points and future perspectives」, In: Iguchi A, Hongo C (Eds.) Coral Reef Studies of Japan, Springer, XX-XX.

[4] Fujita K*, Hongo C （2015) 「Islands and coasts foemed by biominerals」, In: Fujita K, Arakaki T, Denda T, Hidaka M, Hirose M, Reimer JD (Eds.) Nature in the Ryukyu Archipelago: Coral Reefs, Biodiversity, and the Natural Environment. Faculty of Science, University of the Ryukyus, Borderink, 38-45.

[3] Yamano H*, Hongo C, Sugihara K, Yara Y, Nakao Y, and Fujii M (2014) Current status of national coral database in Japan: dataset development, applications, and future directions. In: Nakano S, Yahara T, and Nakashizuka T (eds.) The biodiversity observation network in the Asia-Pacific Region: Integrative Observations and Assessments of Asian Biodiversity. Springer, pp.65-81.

[2] Kayanne H* and Hongo C （2011) Sea level change and its effect on reef growth. In: D. Hopley (ed.) Encyclopedia of Modern Coral Reefs. Springer, pp.966-973.

[1] Kayanne H*, Hongo C and Yamano H （2004） Coral reef landforms in Japan. In: The Japanese Coral Reef Society・Ministry of the Environment (eds.) Coral Reefs of Japan. Ministry of the Environment，pp.14-19

Report

[2] Hongo C （2013) New insights for coral-reef formation: analysis of key species from the drilling cores of the New Caledonian reefs. Grant Report of The Fukada Geological Institute, 107-120 (In Japanese)

[1] Hongo C （2010) Sea-level standstill and dominant hermatypic coral from the Holocene raised reef terraces at the Kikai Island, Ryukyu Islands.Journal of Geography, 119:860-871 (In Japanese)

Ph.D. Thesis

［Chuki Hongo, Sedimentological and ecological formation process of Holocene coral reefs in the western Pacific, The University of Tokyo, 2009.March]

Presentation

[14] Hongo C（2012.7.31）「Increase in intensity of tropical cyclone in the Northwest Pacific at 2000 years ago」，『19th International Unioin For Quaternary Research』，Nagoya, Japan （P09-06, Abstract No.T00211）

[13] Hongo C and Montaggioni LF (2012) Response of key coral species to Holocene sea-level change in the western Indian Ocean，12th International Coral Reef Symposium，Cairns, Australia (Abstract pp.14-15)

[12] Hongo C and Kayanne H (2010) Reconstruction of sea-level record from corals: Reliability of paleodepth indicators using “peak-abundance method”, Japan. (Abstract p. 208) In Japanese

[11] Hongo C and Kayanne H (2009) Change of reef formation and species diversity during the Holocene (Abstract p. 17)

[10] Hongo C and Kayanne H (2009) Spatial and Temporal variations of coral species diversity in the Pacific during the past 10,000 years，The 11th Pacific Science Inter-Congress, Tahiti (Abstract p. 290)

[9] Hongo C and Kayanne H (2008) Pattern of fossil coral communities from Ryukyu Island, Japan and Palau Islands during Holocene sea-level rise，11th International Coral Reef Symposium，Florida, USA (Abstract p.268)

[8] Hongo C and Kayanne H (2008) Reef formation history from coral communities between high energy reef and low energy reef.28th Carbonate Colloquium, Hokkaido, Japan. (Abstract p.6) In Japanese

[7] Hongo C and Kayanne H (2007) Reef formation history from Ishigaki Island and Palau Islands during Holocene. 10th Japanese Coral Reef Symposium, Okinawa, Japan. (Abstract p.69) In Japanese

[6] Hongo C and Kayanne H (2007) Structure and formation process of a reef crest in the Northeast coast Ishigaki Island, Okinawa. 21st Pacific Science Congress, Okinawa, Japan. (Abstract p.317)

[5] Hongo C and Kayanne H (2007) Keep-up reef and sea-level change at Ibaruma reef, Ishigaki Island. 28th Carbonate Colloquium, Hiroshima, Japan (Abstract p.15) In Japanese

[4] Hongo C and Kayanne H (2006) Reef formation history Reef formation at windward and leeward reefs in Ishigaki Island. 9th Japanese Coral Reef Symposium, Sendai, Japan. (Abstract p.126) In Japanese

[3] Hongo C and Kayanne H (2006) Holocene coral reef development under high and low wave energy environment in the Ryukyu Islands, Japan. 17th International Sedimentological Congress, Fukuoka，Japan. (Abstract Vol. A p.244)

[2] Hongo C, Kayanne H, Saito T, Y Ide (2005) Changes in carbonate production based on biological-geologica-chemical estimations from Ibaruma reef, Ishigaki Island. 8th Japanese Coral Reef Symposium, Okinawa, Japan. (Abstract p.104) In Japanese

[1] Hongo C and Kayanne H (2004) Geomorphic Variation of Coral Reefs in the Ryukyu Islands, Japan. 10th International Coral Reef Symposium. Okinawa, Japan. (Abstract p.315)

Experience of review work

Quaternary Science Reviews, Palaeogeography, Palaeoclimatology, Palaeoecology, Global and Planetary Change, Galaxea, Journal of Coral Reef Studies,

Paleontological Research, PLOS ONE, The Quaternary Research

Professional Organization

Membership

2001 - now: The Geological Society of Japan

2001 - now: The Japan Coral Reef Society

2004 - now: International Association of Sedimentologists

2004 - now: Tokyo Geographical Society

2009 - now: International Society for Reef Studies

2009 - now: Society for Sedimentary Geology

2004 - 2009: Sedimentological Society of Japan

2006 - 2009: The Biological Society of Okinawa

2003 - 2009: The Association of Japanese Geographers

Service to Professional Organization

2011.7 - 2015.6: Councilor, The Japan Coral Reef Society

2006.7 - 2011.6: General affairs, The Japan Coral Reef Society

2009.7 - now: Publicist, The Japan Coral Reef Society