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Comparative Study of Macrofauna and Sediment of Two Brackish Tidal Flats Located at River Mouths Facing Sendai Bay
http://hdl.handle.net/10097/41029
http://hdl.handle.net/10097/410294f7461f9-4372-411a-87be-dd4beca1980c
名前 / ファイル | ライセンス | アクション |
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KJ00004380446.pdf (1.1 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-02-05 | |||||
タイトル | ||||||
タイトル | Comparative Study of Macrofauna and Sediment of Two Brackish Tidal Flats Located at River Mouths Facing Sendai Bay | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Estuarine tidal flat | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Macrofauna | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sediment | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sediment-trap material | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者 |
KIKUCHI, Eisuke
× KIKUCHI, Eisuke× HATA, Hiroshi |
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著者別名 | ||||||
姓名 | 菊地, 永祐 | |||||
著者別名 | ||||||
姓名 | 泰, 浩司 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Seasonal investigations of macrofauna, sediment, and deposited participate matter collected by sediment traps were conducted from September 1989 to July 1990 on two estuarine tidal flats, Gamo tidal flat at the mouth of the Nanakita River and Idoura tidal flat at the mouth of the Natori River, Sendai Bay. The macrofauna detected at the two flats were similar, but with different dominant species. Grain size distribution of the sediment may be one of the important factors determining the dominant species. Most of the macrofaunal biomass were made up of deposit-feeders at both tidal flats. Gamo tidal flat had the higher total biomass of macrofauna in warmer seasons (September and July). The C/N ratios of sediment trap samples and surface sediment of the tidal flats suggested that, the sedimentary organic matter at Gamo tidal flat was of more phytoplanktonic in origin, while that at Idoura tidal flat was of terrestrial origin. It was suggested that the greater sedimentation of POM (particulate organic matter) with a higher nutritional value (a lower C/N ratio) resulted in higher biomass of macrobenthos at Gamo tidal flat. The biomass showed the negative correlations with the amount of POM caught in the sediment traps and positive correlations with the Eh of the sediment in warmer seasons at Gamo tidal flat. This suggested that a lower Eh or more reduced anoxic environment of the sediment, caused by an excess input of more labile organic matter, was a factor limiting the benthic macrofaunal biomass at Gamo tidal flat. | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 仙台湾に注ぐ七北田川河口に位置する蒲生干潟と名取川河口の井戸浦干潟において、大型底生動物と堆積物および干潟に沈殿する粒状物質を1989年9月と1990年1月、4月、7月に採集し、底生動物の組成やバイオマスと堆積物・沈殿物の粒度組成、Eh、炭素量、窒素量、C/N比を調べ、干潟間で比較した。その結果、大型底生動物種はほとんどが堆積物食者で、その組成は両干潟で類似していたが、優占種は異なっており、この優占種の違いをもたらす要因の一つとして、両干潟の堆積物の粒度組成の違いがあげられる。干潟堆積物とセジメント・トラップで採集した沈殿物のC/N比から、蒲生干潟の堆積物の有機物は植物プランクトン起源の有機物、井戸浦干潟では陸上の維管束植物起源の有機物の比率がより高く、蒲生干潟の沈殿物の方が堆積物食者の餌としての栄養価が高いと考えられた。蒲生干潟の底生動物のバイオマスは井戸浦干潟よりも大きい。蒲生干潟では沈殿有機物の量が多く、しかも栄養価が高いことが、蒲生干潟の底生動物の大きなバイオマスの理由と考えられる。蒲生干潟では高温の時期(9月、7月)には、堆積物のEhと沈澱炭素量が底生動物のバイオマスとそれぞれ正と負の相関関係を持つ。この事実は、蒲生干潟の有機物の沈澱量が多い場所では、夏期には、活発な有機物の分解に伴ってEhが低下し、無酸素で還元的な環境が発達することが底生動物のバイオマスの増加を抑える要因になることを示唆している。 | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 論文 | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
書誌情報 |
東北アジア研究 en : Northeast Asian studies 号 3, p. 39-58, 発行日 1999-03-31 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1343-9332 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11158374 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
その他の言語のタイトル | ||||||
その他のタイトル | 仙台湾に注ぐ2つの河川の河口に位置する汽水性干潟の底生動物と堆積物の比較研究 | |||||
出版者 | ||||||
出版者 | 東北大学東北アジア研究センター | |||||
出版者 | ||||||
出版者 | publisher | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | 紀要類 | |||||
登録日 | ||||||
日付 | 2010-02-05 | |||||
日付タイプ | Created | |||||
公開日(投稿完了日) | ||||||
日付 | 2010-02-05 | |||||
日付タイプ | Created | |||||
発行日 | ||||||
日付 | 1999-03 | |||||
日付タイプ | Created | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | 1142817 bytes | |||||
公開範囲 | ||||||
値 | 学外 | |||||
著者所属 | ||||||
東北大学東北アジア研究センター / 海洋バイオテクノロジー研究所@@@Center for Northeast Asian Studies, Tohoku University@@@Marine Biotechnology Institute Co., LTD. | ||||||
更新日 | ||||||
日付 | 2010-02-05 | |||||
日付タイプ | Created |