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ID 115367
Title Alternative
PROPOSALS FOR METHODS TO IMPROVE THE ENVIRONMENT OF THE AMAGASAKI CANAL, FOCUSING ON TROPHIC LEVEL OF Tridentiger obscurus
Author
Iwami, Kazuki
Morita, Kaito
Otani, Sousuke
Hashigami, Kazuki
Tanabe, Naoki
Saito, Minoru
Keywords
Tridentiger obscurus
Amagasaki canal
Trophic level
Environmental improvement
Stable isotope analysis
Content Type
Journal Article
Description
本研究では,チチブの栄養段階に着目して,尼崎運河の環境改善の方法について調査研究を行った.その結果,チチブは付着藻類を起点とする底生系の食物連鎖の上位にあり,またチチブを食する大型魚類の存在も示唆された.そこで,環境改善策として,積極的にチチブを保全し,運河内に過剰にある栄養塩をより多くの生物に利用されるようにすることを考えることができた.実際にチチブの保全のためのすみかを作成し,現地実験をした結果,適当なすみかの創出には,空隙がコウロエンカワヒバリガイによって閉塞されないような工夫が必要であることがわかった.
Description Alternative
This study focused on fish species to investigate methods for improving the environment of the Amagasaki Canal. Analysis of the food web revealed that a benthic fish species Tridentiger obscurus has an important role in transferring energy from primary producers to organisms at higher trophic levels. The result suggest that protection of the bottom dwelling T. obscurus is effective for improving the environment of the canal by making excessive nutrients ingestible for other organisms. When artificial shelters for T. obscurus was set in the canal, a large amount of mussel Xenostrobus securi attached to the shelter. The result insists that further improvements are needed to prevent clogging by the shells and make shelters available for T. obscurus.
Journal Title
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
ISSN
21856648
Publisher
土木学会
Volume
76
Issue
6
Start Page
II-121
End Page
II-127
Published Date
2020
Rights
© 2020 公益社団法人 土木学会
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
jpn
TextVersion
Publisher
departments
Research Center for Management of Disaster and Environment