EVALUATION OF LIMITING FACTORS OF PRIMARY PRODUCTION OF INNER BAY USING FATTY ACID COMPOSITION ANALYSIS
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- OHARA Koji
- 東北大学大学院工学研究科土木工学専攻
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- YUGAMI Yohei
- 東北大学大学院工学研究科土木工学専攻
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- KAWAHATA Tatsuya
- 東北大学大学院工学研究科土木工学専攻
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- FUJIBAYASHI Megumu
- 秋田県立大学生物資源学部
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- NISHIMURA Osamu
- 東北大学大学院工学研究科土木工学専攻
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- SAKAMAKI Takashi
- 東北大学大学院工学研究科土木工学専攻
Bibliographic Information
- Other Title
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- 脂肪酸組成分析を利用した内湾一次生産の制限因子の評価
- シボウサン ソセイ ブンセキ オ リヨウ シタ ナイワン イチジ セイサン ノ セイゲン インシ ノ ヒョウカ
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Abstract
We propose a new method to simultaneously identify limiting factors for productions of multiple primary producer types in costal planktonic communities. This method combines fatty acid composition analysis with conventional algal growth potential tests in which various combinations of nutrient and metal species are added to coastal waters. For seawater collected from Shizugawa bay in September 2017, it was shown that the production of POC and chlorophyll a were primarily limited by nitrogen. The fatty acid composition analysis indicated that nitrogen addition markedly increased particle productions especially by bacteria or cyanobacteria. Meanwhile, the productions of fatty acid markers of diatoms, dinoflagellates and green algae remarkably increased by phosphorus addition, so production of those algal groups seems to be limited by phosphorus rather than nitrogen. Overall, our method has great potential to bring useful knowledge to help to predict responses of inner bay primary producers to changes in material compositions loaded from watersheds. Concerning the preservability of the marker fatty acid composition, further study is necessary.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 74 (7), III_53-III_61, 2018
Japan Society of Civil Engineers