Distribution of meio-fauna assemblages in Lake Nurume-Ike, an East Antarctic meromictic lake

• Project/Area Number: 25550084
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental and ecological symbiosis
• Research Institution: Tokai University
• Principal Investigator: Saito Hiromi 東海大学, 生物学部, 准教授 (50433454)
• Research Collaborator: TAKAHASHI T. Kunio ; IMURA Satoshi ; KUDHO Sakae ; HATTORI Hiroshi ; KITO Kenji
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
• Keywords: 南極湖沼 / ぬるめ池 / 線虫 / メイオファウナ / 部分循環湖 / 南極 / 生態系 / 温暖化 / 群集構成 / 群集構成機構

Outline of Final Research Achievements

In Antarctica, many lakes were distributed and it possesses diverse environment. This study examined relationships between abundances of meio-fauna communities and eight environmental factors at five stations in Lake Nurume-Ike in 2008. Furthermore, in 2012, vertical distributions of nematode assemblages within sediment were obtained at five stations. The 2008 results showed a lower abundance of copepods and nematodes at mid-depth. Nematode assemblages consisted of three genera: Chromadora, Microlaimus and Anticoma. Their abundances showed distinctive pattern for lake depth. Among eight environmental factors, copepod abundances negatively correlated with oxygen redox potential and turbidity. In 2012, nematode assemblages were observed at two sampling points. These indicated high density in the upper sediment layers. Present results show changes to community composition of meio-fauna with lake depth due to each specific response to the changeable environments of meromictic lakes.

Research Products

• [Journal Article] 品栄養子である支笏湖湖岸息の底生動物群集の時空間的変動 (2015)
  • Author(s): 斎藤 裕美，望月成，谷野賢二
  • Journal Title: 陸水学雑誌 Volume: ７６ Pages: 203216-203216
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Vertical distribution of copepod and nematode assemblages at Lake Nurume-Ike, an Antarctic meromictic lake (2017)
  • Author(s): Hiromi Saito, Hiroshi Hattori, Tkahashi T. Kunio, Kudho Sakae, Imura Satoshi
  • Organizer: ASLO 2017 Aquatic Sciences Meeting
  • Place of Presentation: ホノルルコンベンションセンター（アメリカ、ハワイ）
  • Int'l Joint Research
• [Presentation] Distribution of meio-fauna assemblages in Lake Nurume-Ike, an East Antarctic meromictic lake: over and under substrate (2016)
  • Author(s): Hiromi Saito, Hiroshi Hattori, Tkahashi T. Kunio, Kudho Sakae, Imura Satoshi
  • Organizer: Anuual meeting of British Ecological Society
  • Place of Presentation: リバプールコンベンションセンター（イギリス、リバプール）
  • Int'l Joint Research
• [Presentation] Vertical distribution of two types of meio-fauna community in East Antarctic saline lake (2015)
  • Author(s): Hiromi Saito, Kazunori Ando, Kunio T. Takahashi, Hiroshi Hattori, Sakae Kudoh, Satoshi Imura
  • Organizer: SESAP(the Society for Coastal Ecosystems Studies)
  • Place of Presentation: チュラロンコン大学（タイ、バンコク）
  • Year and Date: 2015-07-05
  • Int'l Joint Research
• [Presentation] 南極湖沼ぬるめ池のメイオファウナの群集解析 (2015)
  • Author(s): 斎藤裕美，村本識年，福山雄太，高橋邦夫，伊村智，服部寛
  • Organizer: 第28回北海道水生昆虫研究会
  • Place of Presentation: 北海道クリスチャンセンター（北海道札幌市）
  • Year and Date: 2015-03-07
• [Presentation] Nematode community structure and vertical distribution in Lake Nurume (2014)
  • Author(s): Hiromi Saito
  • Organizer: 第5回極域科学シンポジウム
  • Place of Presentation: 国立極地研究所（東京都立川市）
  • Year and Date: 2014-12-02
• [Remarks] 平成29年度一般共同研究終了報告書
  • URL: http://www.nipr.ac.jp/collaborative_research/koubo.html