国立研究開発法人 国際農林水産業研究センター | JIRCAS

Spring Tide Hypoxia with Relation to Chemical Properties of the Sediments in the Matang Mangrove Estuary, Malaysia

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

The dissolved oxygen concentrations (DO) were measured during four expeditions between 2007 and 2008 in the Sangga Besar River Estuary in the Matang Mangrove Forest Reserve (MMFR), Peninsular Malaysia. Hypoxic conditions (DO < 3 mg/L) were observed during periods of well mixed spring tides almost throughout the estuary, while in the partially stratified neap tides, hypoxia in the estuary was restricted to the upper river and subsurface layers in the branch and creek area, where high Acid Volatile Sulfide and low oxidation-reduction potential values were observed in the surface sediments due to the accumulation and decomposition of mangrove derivedorganic matter. Basedonthe δ13C, the contribution of mangrove derived organic matter in the surface sediments of the creek area was estimated to be 77-87%. While in the coastal area, the contribution of phytoplankton was 58-68%. These results indicate that the formation of hypoxic waters in the estuary is mainly due to the tidal mixing of hypoxic waters from the creeks and branches with the estuarine waters during spring tides and probably oxygen consumption by resuspended sediments.

刊行年月2010-07-01
作成者OKAMURA KazumaroTANAKA KatsuhisaSIOW RyonMAN AliasKODAMA MasashiICHIKAWA Tadafumi
著者キーワード

dissolved oxygen

stable isotope

tidal mixing

公開者Japan International Research Center for Agricultural Sciences
データ作成日2010-07-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
44
3
開始ページ325
終了ページ333
DOI10.6090/jarq.44.325
権利Japan International Research Center for Agricultural Sciences
言語eng