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  1. 紀要論文
  2. 琉球大学農学部学術報告
  3. 49号
  1. 部局別インデックス
  2. 農学部

西表島相良川のマングローブ群落における表層堆積泥の化学性および鉱物性

http://hdl.handle.net/20.500.12000/3629
http://hdl.handle.net/20.500.12000/3629
0bb5e83f-076d-4ed6-8520-bb0dcbddff39
名前 / ファイル ライセンス アクション
KJ00000162643.pdf KJ00000162643.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2008-02-14
タイトル
タイトル 西表島相良川のマングローブ群落における表層堆積泥の化学性および鉱物性
言語 ja
作成者 渡嘉敷, 義浩

× 渡嘉敷, 義浩

ja 渡嘉敷, 義浩

金城, 和俊

× 金城, 和俊

ja 金城, 和俊

佐藤, 一紘

× 佐藤, 一紘

ja 佐藤, 一紘

Tokashiki, Yoshihiro

× Tokashiki, Yoshihiro

en Tokashiki, Yoshihiro

Kinjyo, Kazutoshi

× Kinjyo, Kazutoshi

en Kinjyo, Kazutoshi

Sato, Kazuhiro

× Sato, Kazuhiro

en Sato, Kazuhiro

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
主題
言語 ja
主題Scheme Other
主題 マングローブ
言語 ja
主題Scheme Other
主題 表層堆積泥
言語 ja
主題Scheme Other
主題 理化学性
言語 ja
主題Scheme Other
主題 1次鉱物
言語 ja
主題Scheme Other
主題 粘土鉱物
内容記述
内容記述タイプ Other
内容記述 マングローブ群落は沿岸部の陸地化にも大きな役割を果たすと考えられる。ここでは,西表島相良川のマングローブ群落を選定し,干潮時におけるマングローブ群落の縁および群落内部の表層堆積泥の化学性および鉱物性に関連する知見を得る目的で行った。表層堆積泥は最表層(0~0.5cm程度)と表層(0~10cm)のいずれも海側,陸地側および両中間地点におけるマングローブ群落の縁および内部付近から採取した。表層堆積泥のpH は約3~6で陸地側ほど低く,ECは海側で若干高く,中間地点で約10~13mS/cmでいずれも海水の影響が示唆された。有機態炭素含量は約1~5%で全炭素含量(約2~6%)の8割程度を占める中間地点で高かった。化学性はいずれも最表層堆積泥で高い傾向を示した。中間地点では粘土やシルトが多く,その傾向は最表層で高い特徴も示した。シルト画分の一次鉱物はいずれの地点も石英が主体を示した。二次鉱物はいずれの地点でもカオリナイトが主体でイライト,バーミキュライトが随伴した。以上のことから,地形要因や潮の干満による影響も加わり,海側に近い中間地点の最表層ほど粘土画分と有機物が堆積して陸地化が進行しやすく,正・負荷電に富む粘土のバーミキュライトや腐植の機能による寄与が示唆された。
内容記述タイプ Other
内容記述 It is known that mangrove swamp and forest play an important role in land formation of coastal area. The purposes of this investigation were to study on the chemical and mineralogical properties of materials sedimented on the mudflat area in mangrove swamp around Aira river at Iriomote island. Sediment samples were collected from inside and the edge of three different sites of land, middle and sea sides at 0-0.5cm and 0-10 cm depth levels in mangrove swamp. The results showed that the pH values of surface sediment changed from 3-6 and which were lower in the land side compared to other sides in mangrove swamp. The values of the EC were about 10-13mS/cm in middle side, however, those were higher in the sea side of mangrove swamp due to salt transmission form sea water. Total carbon content in mangrove swamp was about 2-6% and 1-5% of organic carbon occupied in 80% of the total carbon content and it was higher in the middle side. The values of chemical properties were higher in the most surface sedement in mangrove swamp. Both clay and silt content were higher in the most surface sediment in the middle side of mangrove swamp. The primary mineral of the silt fraction was mainly quartz in the surface sediment on either side. The secondary mineral of clay fraction was mainly kaolinite and accompanied by both illite and vermiculite even in either side of the surface sediment. From the above results, both materials of clay fraction and organic matter were highly accumulated in the most surface sediment in the middle side of which was affected by movement of tides and physiographic factor. It was suggested that the land formation highly progress in the middle side, contributing by the function of negatively charge humus and negatively and positively charge vermiculite.
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学農学部
言語
言語 jpn
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/3629
識別子タイプ HDL
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0370-4246
収録物識別子タイプ NCID
収録物識別子 AN00250548
収録物名
言語 ja
収録物名 琉球大学農学部学術報告
書誌情報
号 49, p. 175-181
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