ID | 117857 |
Title Alternative | COMPARISON OF THE ABUNDANCE OF PREY ANIMALS FOR ORIENTAL STORKS IN A BIOTOPE AND LOTUS FIELDS IN NARUTO CITY, TOKUSHIMA PREFECTURE, JAPAN.
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Author |
Sugimoto, Kensuke
Sato, Takahiro
Abe, Yuma
Nakajima, Sota
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Keywords | Ciconia boyciana
biotope
abandoned cultivated land
alien species
lotus root field
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Content Type |
Journal Article
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Description | 本研究では,鳴門市に造成されたビオトープが,コウノトリの餌場として機能するかを明らかにするため,周囲の飛来回数の異なるレンコン田とコウノトリの餌生物量を比較した.餌生物は,すくい採りとペットボトルトラップによって採集した.調査の結果,ビオトープで採集された餌生物の湿重量は,コウノトリの飛来回数が多いレンコン田より小さかった.レンコン田で採集された生物は,アメリカザリガニやウシガエルといった外来種が大半を占めた.これらの生物はコウノトリの主要な餌となり得るが,在来種を捕食するなど,在来生態系に負の影響を与えることが懸念される.今後のビオトープ管理においては,在来種の生息に適した環境づくりとともに,外来種の侵入・拡大防止を両立する取り組みが重要であると考えられた.
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Description Alternative | In order to clarify whether the biotope created in Naruto City functions as a feeding sites for storks, this study compared the amount of stork prey in a lotus root field and a biotope created with different numbers of storks flying to the field. Prey organisms were collected by scooping and plastic bottle traps. The results showed that the wet weight of prey organisms collected in the biotope was smaller than that in the lotus root fields, where the storks visited more frequently. The majority of organisms collected in the lotus root fields were non-native species such as American crayfish and bullfrogs. These organisms are the main food source for storks, but there is concern that they may have a negative impact on native ecosystems, for example, by preying on native species. In future biotope management, it is important to create an environment suitable for habitat of native species as well as to prevent the invasion and spread of non-native species.
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Journal Title |
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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ISSN | 21856648
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Publisher | 土木学会
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Volume | 78
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Issue | 6
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Start Page | II-63
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End Page | II-68
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Published Date | 2022
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Remark | 環境システム研究論文集 第50巻
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Rights | © 2022 公益社団法人 土木学会
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language |
jpn
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Publisher
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departments |
Science and Technology
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