Species diversity and distribution of non-geniculate coralline algae along the gradient from seaweed beds to barren grounds

• Project/Area Number: 26850123
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Aquatic bioproduction science
• Research Institution: Hiroshima University
• Principal Investigator: Kato Aki 広島大学, 生物圏科学研究科, 准教授 (00452962)
• Research Collaborator: BABA MASASUKE 公益財団法人海洋生物環境研究所, 中央研究所, 所長代理 (50541059) ; YOSHIDA GORO 国立研究開発法人水産総合技術センター, 瀬戸内海区水産研究所, グループ長 (40371968)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 無節サンゴモ / 地球温暖化 / 磯焼け / 藻場 / 石灰藻 / サンゴモ平原 / 水温上昇 / 温暖化

Outline of Final Research Achievements

Degradation of seaweed beds and expansion of barren grounds have recently been reported along the coasts of Kuroshio Current. Molecular-phylogenic and ecological research on non-geniculate coralline algae, which are representative seaweeds of barren grounds, were conducted to elucidate taxonomic definitions of species distributed from seaweed beds to barren grounds and even species compositions accompanied with these environmental changes. From the west coasts of the Seto Inland Sea to the south-west coast of Kochi Prefecture and the vicinity, 21 species of 11 genera including two newly recorded species from Japan were found. Especially, respective Lithophyllum okamurae and L. kotschyanum were classified into two species based on type specimens and fresh collections from their type localities. In this study, tropical non-geniculate species were found from the south of where tropical Sargassum was found, indicating slowness of growth and dispersal of non-geniculate coralline algae.

Research Products

• [Int'l Joint Research] Universita degli studi di Milano-Bicocca(イタリア)
• [Int'l Joint Research] Sorbonne Universites(フランス)
• [Int'l Joint Research] Universita degli Studi di Milano Bicocca(イタリア)
• [Int'l Joint Research] Museum National d’Histoire Naturelle(フランス)
• [Journal Article] 瀬戸内海中西部の広島県竹原市周辺における海藻相と季節的消長 (2016)
  • Author(s): 加藤亜記・城内辰享
  • Journal Title: 藻類 Volume: 64 Pages: 1-9
  • NAID: 120006502659
  • Peer Reviewed
• [Presentation] 藻場から磯焼け域における無節サンゴモの生育種と分布 (2017)
  • Author(s): 加藤亜記・馬場将輔・島袋寛盛・吉田吾郎・目崎拓真・中地シュウ
  • Organizer: 日本藻類学会第41回大会
  • Place of Presentation: 高知大学
  • Year and Date: 2017-03-23
• [Presentation] 瀬戸内海西部のニホンアワサンゴ群生地における海藻群落構造 (2016)
  • Author(s): 嶋大磯・*加藤亜記・小池一彦・藤本正明・島袋寛盛・吉田吾郎
  • Organizer: 日本藻類学会第40回大会
  • Place of Presentation: 日本歯科大学，東京
  • Year and Date: 2016-03-18
• [Presentation] Current situation of the systematic study of extant coralline red algae (2015)
  • Author(s): *Kato, A. & Liao, L. M.
  • Organizer: 11th International Symposium of Fossil Algae
  • Place of Presentation: University of the Ryukyus, Okinawa, Japan
  • Year and Date: 2015-09-14
  • Int'l Joint Research / Invited
• [Presentation] 北西太平洋における石灰藻球（Rhodolith）研究 (2015)
  • Author(s): *加藤亜記・馬場将輔・松田伸也・井龍康文
  • Organizer: 日本藻類学会第39回大会（福岡 2015）
  • Place of Presentation: 九州大学
  • Year and Date: 2015-03-20 – 2015-03-25
• [Book] Chapter 14. Western Pacific. In “Rhodolith/maerl beds: A Global Perspective” (Riosmena-Rodriguez, R., Kendrick, G. & Aguirre, J. eds.). Coastal Research Library 15. (2017)
  • Author(s): Kato, A., Baba, M., Matsuda, S. & Iryu, Y.
  • Total Pages: 13
  • Publisher: Springer International Publishing