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燧灘における砂泥撹乱と植生
https://fra.repo.nii.ac.jp/records/2003188
https://fra.repo.nii.ac.jp/records/200318879713697-71b8-4f0e-974c-e4cab4f94392
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-04-25 | |||||
| タイトル | ||||||
| タイトル | 燧灘における砂泥撹乱と植生 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Vegetation on Sandy Substrata in Relation to Sediment Disturbance in Hiuchi-Nada | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Burrow opening; Sediment disturbance; Sand substrata; Vegetation; Thalassinidean shrimps | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
寺脇, 利信
× 寺脇, 利信× 重田, 利拓× 新井, 章吾 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | SCUBA observations were conducted in order to clarify the relationship between the vegetation and the degree of sediment disturbance to the sand substrata. Off Enoura on the northern coast of Hiuchi-Nada was selected as survey station of gentle sediment disturbance by current flow patterns and boat wakes, and as representative of flourishing vegetation sites. Off Minoura on the southern coast ofHiuchi-Nada was selected as survey station of strong sediment disturbance by wave power caused by seasonal wind during winter, and as poor vegetation sites. Quadrats were taken from a depth of 1 m to 4 m based on the datum level (D.L.) for analysis of the size of ripple mark, coverage of seagrass and algae, the burrow opening density of thalassinidean shrimps at both stations on 20th and 21th December, 1995. Particle size distribution and ignition loss of sediment were also surveyed by a hand-held cylindrical core sampler to clarify the effects of physical factors such as wave, current and sand action on the vegetation. At Enoura, the environmental features of the sand substrata were classsified into three types as follows. 1. Mediolittoral (Eulittral) zone condition under large sediment disturbance: low ignition loss, low mud content level, high sorting of sediment, high median diameter level and clear ripple marks in the shallow and near the strait area. 2. Upper infralittoral (Upper sublittral) zone condition under gentle sediment disturbance: abundantseagrass and algae, no ripple marks, high ignition loss, high mud content level, medial median diameter level and low sorting of sediment. 3. Infralittoral (Sublittral) zone condition under low sediment disturbance: high mud content level, high sorting of sediment and low median diameter level, in the deep and near the pit area. At Minoura, the environmental features of the sand substrata were comparatively uniform and burrowopening density of thalassinidean shrimps was several times higher than at Enoura. The environmental features at Minoura were similar to both the mediolittoral zone and the upper infralittoral zone conditions at Enoura, although the survey station of Minoura is within the infralittoral zone in depth. | |||||
| 言語 | en | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | アマモなど海草·藻類が分布し,砂泥搅乱を生じさせる主要な力が潮流と船舶の後流による小さな波である瀬戸内海燧灘の北岸の広島県向島町江の浦地先と,対照に,吹走距離の長い大きな波である燧灘の南岸の香川県豊浜町箕の浦地先を選定した。両定点の測点において,一辺50cmの方形枠を用い,砂漣の長さと高さ,海草·藻類の被度,アナジャコ類の巣穴の開口部密度を計測し,採泥し,粒径と強熱減量を測定した。北岸でアマモ群落の分布範囲が季節的に最小となり,南岸で季節風による波で砂漣が明瞭化する冬期(1995年12月20日~21日)に調査した。江の浦地先の砂泥域の環境を以下の3つに類型化した。1. 砂泥搅乱が大きい潮間帯的な環境:浅くなるか布刈瀬戸側で,砂漣が見られ,粒径が大きいものに集中し,泥分率と強熱減量の値が小さい環境2. 砂泥搅乱が中間的で潮下帯上部的な環境:アマモを含め海草·藻類の豊かな植生が認められ,粒径が幅広く分布し,比較的,泥分率と強熱減量の値が高く,砂連がみられない環境3. 砂泥搅乱が小さい潮下帯的な環境:深くなるか地形的な凹部で,粒径の小さいものに集中し,泥分率の値が高い環境箕の浦地先では,アナジャコ類の巣穴の開口部密度が,江の浦地先よりも数倍も高かった。しかも,水深が深く潮下帯であるにも拘わらず、砂漣が見られ,粒径が狭い範囲に集中し,泥分率が低かったことから,波による砂泥搅乱が大きく、江の浦地先の潮間帯的な環境との共通点がみられた。さらに,粒径が中央粒径値1~2Φと小さく,アナジャコ類の果穴が見られる点からは,江の浦地先の潮下帯上部的な環境との共通点もみられた。 | |||||
| 言語 | ja | |||||
| bibliographic_information |
ja : 南西海区水産研究所研究報告 en : Bulletin of Nansei National Fisheries Research Instituite 巻 30, p. 163-171, ページ数 9, 発行日 1998-03 |
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| 出版者 | ||||||
| 出版者 | 南西海区水産研究所 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | Nansei National Fisheries Research Instituite | |||||
| 言語 | en | |||||
| item_10002_source_id_9 | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0388-841X | |||||
| item_10002_source_id_11 | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00181988 | |||||
| 情報源 | ||||||
| 識別子タイプ | Local | |||||
| 関連識別子 | nnf_k_30_163 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010552368 | |||||
| 言語 | ja | |||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||
