Assessment of human impact on nitrogen dynamics in estuarine ecosystems

2012 Fiscal Year Final Research Report

• Project/Area Number: 22710014
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Environmental dynamic analysis
• Research Institution: Fukui Prefectural University
• Principal Investigator: SUGIMOTO Ryo 福井県立大学, 海洋生物資源学部, 助教 (00533316)
• Project Period (FY): 2010 – 2012
• Keywords: 窒素循環 / 安定同位体比 / 河口域 / 硝化 / 脱窒 / 貧酸素水塊

Research Abstract

We evaluated the human impact on nitrogen cycle in two contrasting estuarine ecosystems (Yodo River-Osaka Bay and Kita River-Obama Bay) by using stable isotopes. In the Yodo river-Osaka Bay system, not only nitrogen loading from the land but also regenerated nitrogen within the estuary and the bay had a large impact on nitrogen dynamics. Although there was little local anthropogenic nitrogen loading in the Kita River, influence of nitrate deposition from atmosphere was observed in both the river and Obama Bay during winter.

Research Products

• [Journal Article] 安定同位体比を利用した河口・沿岸域における懸濁態有機物の挙動と物質循環解析 (2013)
  • Author(s): 杉本亮、笠井亮秀、佐藤専寿、富永修
  • Journal Title: 沿岸海洋研究 Volume: 51(印刷中)
  • Peer Reviewed
• [Journal Article] 安定同位体比およびC/N比から評価した小浜湾における堆積有機物の起源 (2013)
  • Author(s): 佐藤専寿, 杉本亮, 富永修
  • Journal Title: 水産海洋研究 77 Pages: 1-9
  • Peer Reviewed
• [Presentation] Nitrogen Dynamics in the Yodo River Estuary (2013)
  • Author(s): Ryo Sugimoto、 Akihide Kasai
  • Organizer: Japan. 10th EMECS Global Congress on Integrated Coastal Management:Lessons Learned to Address New Challenges
  • Place of Presentation: Turkey(予定)
  • Year and Date: 20131030-1103
• [Presentation] Submarine groundwater discharge in Obama Bay (2013)
  • Author(s): Hisami Honda、Ryo Sugimoto、Shiho Kobayashi、Yoshitake Takao、Daisuke Tahara、Osamu Tominaga、Makoto Taniguchi
  • Organizer: 10th EMECS Global Congress on Integrated Coastal Management:Lessons Learned to Address New Challenges
  • Place of Presentation: Turkey(予定)
  • Year and Date: 20131030-1103
• [Presentation] 大阪湾奥部底層水中における溶存無機態窒素の安定同位体比特性 (2013)
  • Author(s): 杉本亮、笠井亮秀、山本圭吾
  • Organizer: 2013日本海洋学会春季大会
  • Place of Presentation: 東京
  • Year and Date: 2013-03-22
• [Presentation] 小浜湾における基礎生産過程に地下水湧出が及ぼす影響 (2012)
  • Author(s): 本田尚美、杉本亮、小林志保、田原大輔、富永修、谷口真人
  • Organizer: 2012年度水産海洋学会
  • Place of Presentation: 東京都
  • Year and Date: 20121115-18
• [Presentation] 小浜湾における一次生産機構の時空間変化 (2012)
  • Author(s): 本田尚美、杉本亮、田原大輔、富永修
  • Organizer: 2012年度日本海洋学会秋季大会
  • Place of Presentation: 清水市
  • Year and Date: 20120913-17
• [Presentation] 福井県北川・南川における硝酸態窒素の濃度と起源の時空間変化 (2012)
  • Author(s): 坪井智子、杉本亮、富永修
  • Organizer: 日本陸水学会第77回大会
  • Place of Presentation: 名古屋
  • Year and Date: 2012-09-16
• [Presentation] 小浜湾に形成される底層クロロフィル極大 (2011)
  • Author(s): 本田尚美、杉本亮、富永修
  • Organizer: 2011年度水産海洋学会
  • Place of Presentation: 函館市
  • Year and Date: 20111111-13
• [Presentation] 北川から小浜湾へ供給される懸濁物質および栄養塩類のフラックス (2011)
  • Author(s): 佐藤専寿、杉本亮、富永修
  • Place of Presentation: 函館市
  • Year and Date: 20111111-13
• [Presentation] 淀川感潮域における春季大潮時の硝酸態窒素の動態 (2011)
  • Author(s): 杉本亮,笠井亮秀
  • Organizer: 水産海洋学会
  • Place of Presentation: 函館市
  • Year and Date: 2011-11-12
• [Presentation] 福井県北川・南川における栄養塩組成の季節変化 (2011)
  • Author(s): 坪井智子・杉本亮・富永修
  • Organizer: 水産海洋学会
  • Place of Presentation: 函館市
  • Year and Date: 2011-11-12
• [Presentation] 同位体比を利用した淀川河口域における硝酸態窒素の動態解析 (2011)
  • Author(s): 杉本亮、笠井亮秀
  • Organizer: 2011年度日本海洋学会春季大会
  • Place of Presentation: 柏市
  • Year and Date: 2011-03-23