| ID | 117832 |
| Title Alternative | CHARACTERISTICS OF CARBON FLOW ON PELAGIC ECOSYSTEMS AT HYPERNUTRIENT AREA IN AMAGASAKI CANAL
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| Author |
Otani, Sosuke
Fujishima, Kohei
Tanaka, Syunsuke
Yuasa, Shota
Nakai, Takaya
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| Keywords | Primary priduction
Secondary production
Xenostrobus secures
Transfer efficiency
Canal
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| Content Type |
Journal Article
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| Description | 本研究では，大阪湾湾奥に位置する尼崎運河における植物プランクトン，動物プランクトンおよびコウロエンカワヒバリガイの現存量・生産速度を定量化することで，一次生産者から二次生産者へ至る年間の炭素フローを算出し，転送効率について評価した．植物プランクトンによる一次生産速度は他の水域に比べて高く，動物プランクトンの個体数，二次生産速度は低かった．年間を通して，植物プランクトンから動物プランクトン，コウロエンカワヒバリガイの転送効率はそれぞれ0.76%，7.8%であり，合わせて8.6%の有機炭素が二次生産者へ移行していた．運河ではコウロエンカワヒバリガイは効率よく成長して炭素を固定しているが，動物プランクトンは食物連鎖において魚類の現存量・生産速度に影響していることが示唆された．
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| Description Alternative | The purpose of this study was to reveal the carbon flow from primary producer (phytoplankton) to secondary producers (zooplankton and Xenostrobus securis), transfer efficiency at hyper-nutrient area in the Amagasaki Canal of inner part of Osaka Bay. The primary production rate was higher than that of other water area, while zooplankton biomass and secondary production rate were lower. The production rate of X. securis was about 1/12 of that of phytoplankton, but biomass was about 29 times higher. Transfer efficiency from phytoplankton to zooplankton and X. securis was 0.76% and 7.8%, respectively. These results suggested that X. securis grew efficiently and fixed organic carbon, zooplankton were not functioning properly as intermediaries in the food chain between phytoplankton and fishes.
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| Journal Title |
Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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| ISSN | 18838944
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| Publisher | 土木学会
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| Volume | 77
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| Issue | 2
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| Start Page | I_877
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| End Page | I_882
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| Published Date | 2021
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| Rights | © 2021 公益社団法人 土木学会
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| EDB ID | |
| DOI (Published Version) | |
| URL ( Publisher's Version ) | |
| FullText File | |
| language |
jpn
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| TextVersion |
Publisher
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| departments |
Research Center for Management of Disaster and Environment
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