Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

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Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

Papers 【 display / non-display 】

Papers 【 display / non-display 】

• Morphology and Taxonomy of Marine Benthic Diatoms (18), Genus <i>Gomphonemopsis</i> (<i>Rhoicospheniaceae</i>, <i>Cymbellales</i>) (Part 1)

  YOSHINAGA Shinra, SUZUKI Hidekazu, KAMIYA Mitsunobu, OSADA Keigo , 2024.08

  The Journal of Japanese Botany

  DOI

• A New Freshwater Benthic Cyanobacterium, <i>Chamaesiphon bursiformis</i>, from Spring Habitats in Japan

  FUKUOKA Masayuki, KITANO Mizuki, SUZUKI Hidekazu, KAMIYA Mitsunobu, TANAKA Jiro , 2024.02

  The Journal of Japanese Botany

  DOI

• Morphology and Taxonomy of Marine Benthic Diatoms (12), Genus <i>Seminavis </i>(<i>Naviculaceae</i>, <i>Naviculales</i>) (Part 3)

  SASANO Nagi, SUZUKI Hidekazu, OSADA Keigo, KAMIYA Mitsunobu , 2023.04

  The Journal of Japanese Botany

  DOI

• Morphology and Taxonomy of Marine Benthic Diatoms (11), Genus <i>Seminavis </i>(<i>Naviculaceae</i>, <i>Naviculales</i>) (Part 2)

  SASANO Nagi, SUZUKI Hidekazu, OSADA Keigo, KAMIYA Mitsunobu , 2023.02

  The Journal of Japanese Botany

  DOI

• Reproductive strategy of florideophycean red algae with an isomorphic life cycle

  Kamiya Mitsunobu , 2023

  JAPANESE JOURNAL OF ECOLOGY

  DOI

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Books 【 display / non-display 】

Books 【 display / non-display 】

• 現代おさかな事典 第二版：漁場から食卓まで

  奥谷喬司監修 , 2024.03

  エヌ・ティー・エス

• Japanese marine life : a practical training guide in marine biology

  稲葉, 一男, Hall-Spencer, Jason M. , 2020

  Springer , 0-0

• Syllabus of Plant Families: Part 2/2. Photoautotrophic eukaryotic Algae Rhodophyta.

  1. Kamiya, M., Lindstrom, S. C., Nakayama, T., Yokoyama, A., Lin, S.-M., Guiry, M. D., Gurgel, C. F. D., Huisman, J. M., Kitayama, T., Suzuki, M., Cho, T. O. & Frey, W. , 2017.06

  Borntraeger Science Publishers , Rhodophyta; Characterization and relationships Florideophyceae; Characterization and relationships, Ahnfeltiophycidae, Corallinophycidae, Nemaliophycidae, Rhodymeniophycidae , 1-171

• 「海藻の疑問50（みんなが知りたいシリーズ）」

  田中次郎ほか17名 , 2016.06

  成山堂書店, , Q35：海藻は海以外でも見られるの？, Q36：海藻はどうやって外敵から身を守っているの？, Q38：海藻に寄生する海藻っているの？ , 1-168

• 藻類ハンドブック

  渡辺, 信 , 2012.07

  エヌ・ティー・エス , 0-0

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

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

• 河口・汽水域生態系における底生珪藻群集の構造解析

  Project Period (FY)： 2022/04  -  2025/03  Investigator(s): 鈴木 秀和

  Grant-in-Aid for Scientific Research(C)  Co-Investigator  22K05800 

• Structure analysis of the attached diatom assemblage in the coral reef ecosystem

  Project Period (FY)： 2019/04  -  2022/03  Investigator(s): Suzuki Hidekazu

  Grant-in-Aid for Scientific Research(C)  Co-Investigator  19K06205 

  The attached diatom assemblage in the coral reef including the peripheral seaweed bed and estuary areas were studied based on the samples collected from the several coasts of Japan. The species composition, similarity and diversity of attached diatom microflora over the entire coastal area of Japan were obtained by adding the samples collected and stored by the applicants so far. We found diatom taxa peculiar to the coral reef area by biogeographic statistical analysis. The colonial structure and molecular phylogenetic analyses by culture experiment for specific classification taxa have provided the taxonomical and ecological data including the description 5 new species. In the desiccation tolerance experiment, it was confirmed that the species showing high tolerance to desiccation stress had an increased proportion of lipid droplets in the cells. This result suggests that the lipid droplet ratio may be related to the factor that determines the desiccation tolerance of the diatom.

• Ecophysiological and population genetic study on red algae showing isomorphic life cycle

  Project Period (FY)： 2019/04  -  2022/03  Investigator(s): Kamiya Mitsunobu

  Grant-in-Aid for Scientific Research(C)  Principal Investigator  19K06806 

  Ecological examination of two Chondrus species showing sympatric distribution revealed that gametophytes and sporophytes were continuously dominant in C. verrucosus and C. ocellatus, respectively and that the growth rate and fertility rate were similar between the two phases in both species. These results suggest that the populations of the two species were possibly maintained by vegetative reproduction of holdfasts, instead of spore reproduction. Thallus water content and physical strength tended to be higher in gametophytes than sporophytes and this property may be related to the gametophyte dominance of C. verrucosus, but it is still unknown why sporophytes are more abundant in C. ocellatus.

• Investigation on the distribution of alkylglycerolipids in Chlorophyta

  Project Period (FY)： 2018/04  -  2021/03  Investigator(s): OKU Naoya

  Grant-in-Aid for Scientific Research(C)  Co-Investigator  18K05827 

  Sulfoquinovosylglyceryl ether (SQGE) is a novel polar ether lipid, which we have previously discovered from Aegagropilopsis moravica, a lake ball-forming green alga related to “marimo” Aegagropila linnaei (family Pithophoraceae, order Cladophorales, class Ulvophyceae). To clarify the interspecific distribution of SQGE within the division Chlorophyta, a rapid and convenient analytical scheme to qualitatively detect SQGE from a relatively small amount of algal mass (~ 1 g) using a 2D NMR technique was developed and applied to algal specimens collected at Japanese marine and freshwater environments. In total 33 specimens of green algae were collected and 17 specimens that are phylogenetically related to A. moravica were subjected to this analytical scheme. Because SQGE was only detected in Aegagropila-clade algae including A. linnaei, Basicladia okamurae, Bascicladia sp., and Pithophora sp., SQGE was considered to be specific to Aegagropila-clade algae.

• Evolutionary ecology of asexual green alga Ulva prolifera including many heterozygous genotypes

  Project Period (FY)： 2015/04  -  2019/03  Investigator(s): Kamiya Mitsunobu

  Grant-in-Aid for Scientific Research(C)  Principal Investigator  15K07194 

  Eight hsp90 genotypes of Ulva prolifera mainly detected from Mikata-goko and Minami River were distinguished into four ecotypes based on their distribution patterns: type I found throughout Mikata-goko, type II distributed in the downstream and entrance of Mikata-goko, type III observed in the downstream and entrance of Mikata-goko and Minami River, and type IV limited in Minami River. Tolerance against freshwater exposure and maturation rate in a low salinity medium were different among these ecotypes, suggesting their physiological differentiation. Furthermore, the examination of settled zoids in using hsp90 gene markers revealed that zoids of type I were detected from the entrance of Mikata-goko where thalli of type I had never been observed. Although zoids of various ecotypes were widely dispersed, the zoids of only ecotype(s) adapted to each environmental condition were survived under selection pressure, and this makes the distribution pattern of each ecotype different.

Lesson Subject 【 display / non-display 】

Lesson Subject 【 display / non-display 】