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Research Interests 【 display / non-display 】

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Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Double migration of the endangered Tricyrtis formosana (Liliaceae) in Japan.

  Tsunenari K, Ito T, Yokota M, Shibabayashi M, Endo C, Chung KF, Suyama Y, Matsuo A, Abe A, Naiki A, Setoguchi H, Makino T, Isagi Y

  Scientific reports ( Scientific Reports )  14 ( 1 ) 957 - 957   2024.01 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  　View Summary

  The Ryukyu Islands of Japan are a biodiversity hotspot due to geographical and historical factors. Tricyrtis formosana is a perennial herbaceous plant that commonly found in Taiwan. But only a few populations have been identified in a limited habitat on Iriomote Island, while populations of unknown origin occur near human settlements in an area on the main island of Okinawa. To better understand these populations of the phylogenetic uniqueness and intrinsic vulnerability, we conducted comparative analyses including (1) phylogeny and population structure with MIG-seq data, (2) photosynthesis-related traits of plants grown under common conditions and (3) transcriptome analysis to detect deleterious variations. Results revealed that T. formosana was split into two clades by the congeners and that Iriomote and Okinawa populations independently derived from ancestral Taiwanese populations in each clade. Photosynthetic efficiency was lowest in the Iriomote population, followed by Okinawa and Taiwan. Transcriptome analysis showed that the Iriomote population accumulated more deleterious variations, suggesting intrinsic vulnerability. These results indicate that each T. formosana population in Japan is phylogenetically unique and has been independently dispersed from Taiwan, and that the Iriomote population presents a high conservation difficulty with a unique photosynthesis-related characteristic and a larger amount of deleterious variations.

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• New or noteworthy distribution records of some vascular plants from Iriomote Island, Okinawa, Japan

  Takenori Yamamoto, Koji Yonekura, Atsushi Abe, Masaharu Amano, Hironori Toyama, Takuto Shitara, Shuichiro Tagane, Aya Hasegawa, Mikio Kashima, Tadashi Kajita, Akiko Soejima, Akiyo Naiki

    98 ( 4 ) 178 - 191   2023.08 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Hymenophyllum pilosissimum C. Chr. (Hymenophyllaceae) on Iriomote Island, a New Record for Japan

  Akiyo Naiki, Takenori Yamamoto, Aya Hasegawa, Tao Fujiwara, Katsuhiro Yoneoka, Atsushi Ebihara

  Acta Phytotaxonomica et Geobotanica ( 日本植物分類学会 )  74 ( 2 ) 131 - 133   2023.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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  Hymenophyllum pilosissimum C. Chr. (Hymenophyllaceae), recently discovered on Iriomote Island, is reported for the first time in Japan.

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• Rediscovery of Exallage auricularia (Rubiaceae) from Yonaguni Island, Okinawa, Japan

  Akiyo Naiki, Tadaki Nakasone, Tetsuo Ohi-Toma, Koji Yonekura, Atsushi Abe

  The journal of Japanese botany   98 ( 3 ) 134 - 139   2023.06 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• First Record of an Alien Plant Species, <i>Dentella repens</i> (<i>Rubiaceae</i>) from Japan

  KAJITA Yui, YONEKURA Koji, NAIKI Akiyo

  The Journal of Japanese Botany ( The Editorial Board of The Journal of Japanese Botany )  98 ( 2 ) 97 - 100   2023.04 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  　View Summary

  <p>We collected an alien plant, <i>Dentella repens</i> (L.) J.R.Forst. & G.Forst. (<i>Rubiaceae</i>) for the first time from the northern part of Iriomote Island, Okinawa, Japan in 2020. It is a new record of the species and the genus <i>Dentella</i> from the country. Since the first record in 2020, the plant has been found steadily growing at one site in a village near the northern shore of the island. We observed the morphology of the collected materials in detail under a stereomicroscope and the characteristics were generally consistent with the descriptions of the species in previous studies. The features of hairs on the corolla and calyx lobes are new additional information for the species.</p>

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Books 【 display / non-display 】

Books 【 display / non-display 】

• A Picture Guide for the Flora of Bidoup-Nui Ba National Park I: Mt. Langbian

  Ai Nagahama, Shuichiro Tagane, Nguyen Van Ngoc, Hoang Thi Binh, Truong Quang Cuong, Hironori Toyama, Hidetoshi Nagamasu, Kojin Tsuchiya, Zhang Meng, Yoshihisa Suyama, Etsuko Moritsuka, Nguyen Thi Anh Thu, Nguyen Cuong Thinh, Ayumi Matsuo, Shun Hirota, Akiyo Naiki, Le Van Son, Pham Huu Nhan, Tetsukazu Yahara ( Part: Multiple Authorship )

  Kyushu University Press  2019.02

• A Picture guide of forest plants in Gunung Gede Pangrango National Park, Indonesia

  Tagane Shuichiro, Toyama Hironori, 内貴 章世, 永益 英敏, 矢原 徹一, Darnaedi Dedy, Dja-maluddin Ibrahim, Ardiyani Marlina, Hidayat Arief, Ashari Ahmad Jaeni, Ichihashi Ryuji ( Part: Multiple Authorship )

  Kyushu University Press  2018

• Wild Flowers of Japan 4

  Koji Yonekura, Hiroyoshi Ohashi, Akiyo Naiki et al. ( Part: Multiple Authorship ,  Rubiaceae )

  Heibonsha  2017.03

• A picture guide of forest trees in Cambodia v. 4

  Tagane, S, Toyama H, Fuse K, Chhang P., Naiki, A. Nagamasu, H, Yahara, T ( Part: Multiple Authorship )

  Kyushu University Press  2017.02

• A list of vascular plant specimens of Nara Prefecture in the herbarium of the Osaka Museum of Natural History

  Akiyo Naiki, Kiyoshi Matsui, Shinji Fujii, Ko Seto ( Part: Multiple Authorship )

  Osaka Museum of Natural History  2010.03

Other Papers 【 display / non-display 】

Other Papers 【 display / non-display 】

• An invasive weedy herb, Praxelis clematidea (Hieron. ex Kuntze) R.M.King & H.Rob. (Asteraceae-Eupatorieae) newly naturalized in Yaeyama Islands, Okinawa Pref., Japan

  米倉浩司, 内貴章世

  日本植物分類学会大会研究発表要旨集   20th (CD-ROM)   2021

   

  J-GLOBAL

• Ecology of rheophyte characterized having Eriocaulon sexangulare L.

  高岸慧, 宮本太, 内貴章世

  日本生態学会大会講演要旨(Web)   68th   2021

   

  J-GLOBAL

• Factors causing differences in fruit morphology between two morphs and among environments of Scaevola taccada

  栄村奈緒子, 古本良, 内貴章世, 梶田忠, 工藤洋

  日本生態学会大会講演要旨(Web)   67th   2020

   

  J-GLOBAL

• Vascular plant species diversity and distribution pattern in Iriomote Island: latest report of comprehensive survey in the island

  設樂拓人, 遠山弘法, 指村奈穂子, 山本武能, 古本良, 石垣圭一, 井村信弥, 内貴章世

  日本生態学会大会講演要旨(Web)   67th   2020

   

  J-GLOBAL

• Conservational study for the threatened plant species Eriocaulon truncatum Buch.-Ham. ex Mart. in Iriomote Island

  高岸慧, 宮本太, 内貴章世

  日本生態学会大会講演要旨(Web)   67th   2020

   

  J-GLOBAL

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Academic Awards 【 display / non-display 】

Academic Awards 【 display / non-display 】

• 12th Best Paper Award

  2018.03   Japanese Society for Plant Systematics   Morphological and Molecular Phylogenetic Analyses of Geranium yesoense (Geraniaceae) in Japan

  Winner: Wakasugi Y, H. Azuma, A. Naiki, S. Nishida

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Examining the impact of typhoon disturbance on plant species diversity in a wet subtropical forest using a 3D canopy model.

  Grant-in-Aid for Scientific Research(C)

  Project Year: 2023.04  -  2026.03 

  Direct: 3,600,000 (YEN)  Overheads: 4,680,000 (YEN)  Total: 1,080,000 (YEN)

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2021.04  -  2024.03 

  Direct: 3,200,000 (YEN)  Overheads: 4,160,000 (YEN)  Total: 960,000 (YEN)

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2019.04  -  2022.03 

  Direct: 3,300,000 (YEN)  Overheads: 990,000 (YEN)  Total: 4,290,000 (YEN)

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2017.04  -  2020.03 

  Direct: 3,700,000 (YEN)  Overheads: 1,110,000 (YEN)  Total: 4,810,000 (YEN)

• Molecular phylogeny and systematics of Leptopetalum (Rubiaceae) with special reference to evolution of shrubby species in oceanic island

  Grant-in-Aid for Scientific Research(C)

  Project Year: 2017.04  -  2020.03 

  Investigator(s): Murata Jin 

  Direct: 3,700,000 (YEN)  Overheads: 4,810,000 (YEN)  Total: 1,110,000 (YEN)

  　View Summary

  The phylogenetic relationships among the species of Leptopetalum (Rubiaceae) were updated by collecting new samples throughout their distributional range. The obtained phylogenetic tree indicated that four shrubby species were monophyletic but nested among herbaceous species, suggesting the evolution of the shrubby species as a result of the range expansion of herbaceous species. In the herbaceous species, several clades were detected and neither of L. biflorum and L. strigulosum was monophyletic. Based on a literature review and examination of type specimens, as well as morphological comparison, L. strigulosum was widely distributed in the Pacific islands but not in East Asia. In East Asia, a new combination, L. coreanum (H. L&#233;v.) Naiki & Ohi-Toma, was proposed. On the other hand, L. biflorum apparently contained a few entities from the morphological and phylogenetic views points, but several taxonomical problems remain to be solved in the revision of L. biflorum.

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Other External funds 【 display / non-display 】

Other External funds 【 display / non-display 】

• Project Year: 2020.04  -  2023.03 

  Offer Organization: Environmental　Restoration　and　Conservation　Agency (ERCA)

SDGs 【 display / non-display 】

SDGs 【 display / non-display 】

Social Activity 【 display / non-display 】

Social Activity 【 display / non-display 】

• 2023.11