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2023 Fiscal Year Final Research Report

Diversity, physiological and ecological characteristics of deep-water red algal ecosystem at offshore of Mageshima Island, Kagoshima Prefecture, Japan

Research Project

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Project/Area Number 20K06797
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 45030:Biodiversity and systematics-related
Research InstitutionKobe University

Principal Investigator

Suzuki Masahiro  神戸大学, 内海域環境教育研究センター, 特命助教 (30637088)

Project Period (FY) 2020-04-01 – 2024-03-31
Keywords深所性紅藻 / 馬毛島沖 / DNAバーコーディング / 海藻 / 藻類 / 分類学
Outline of Final Research Achievements

In order to elucidate the diversity of deep-water red algal ecosystem at a depth of 30-40 m offshore of Mageshima Island, Kagoshima Prefecture, Japan, the rbcL and cox1 sequences of 159 specimens were determined. According to morpho-anatomical observations and molecular analyses, a total of 148 species were reported. Seventy species were identified as named species, while 58 species were not corresponded to the species listed in Japan. Among the identified species, nine species were grown at more than 30 m depth, while the others were same species grown at low-tide line to 20 m depth in various area of Japan.

Free Research Field

藻類分類学

Academic Significance and Societal Importance of the Research Achievements

本研究は,日本近海で水深30 m以深に生育する深所性紅藻を網羅的な遺伝子解析に基づいて調査した初めての研究である。本研究の結果,鹿児島県馬毛島沖には143種の紅藻が確認された。その内の50種以上が,既知の日本産種に一致しない未記載・未報告種であり,深所には未知の種が多く存在することが示唆された。また,馬毛島沖で確認できた種の多くが,通常は浅いところに生育する種であり,他地域では水深20 m辺りまでしか生育できない種が,馬毛島沖では30 m以深でも生育出来ていることが示唆された。馬毛島沖の深所性紅藻生態系は,これまで報告された深所性海藻生態系とは異なる特徴を持っていると考えられる。

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Published: 2025-01-30  

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