Variations in abundance and size distribution of carbohydrates in the lower Mississippi River, Pearl River and Bay of St Louis
作者： Xuri Wang , Yihua Cai , Laodong Guo
DOI: 10.1016/J.ECSS.2013.04.008
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摘要: Abstract Riverine export of dissolved and particulate organic matter to the sea is one major components in marine carbon cycles, affecting biogeochemical processes estuarine coastal regions. However, detailed composition material relative partitioning among dissolved, colloidal, phases are poorly quantified. The abundance carbohydrate species their were examined waters from lower Mississippi River (MR), Pearl (PR), Bay St. Louis (BSL). Particulate carbohydrates (PCHO) represented a small fraction (POC) pool, with 4.7 ± 3.1%, 4.5 ± 2.4% 1.8 ± 0.83% MR, PR, BSL, respectively. Dissolved (DCHO) component bulk (DOC) comprising 23%, 35%, 18% Differences DCHO/DOC ratio between BSL related distinct characteristics drainage basins, anthropogenic impacts, hydrological conditions, reflecting differences sources different aquatic environments. Within total (TCHO) high-molecular-weight (HMW-CHO, 1 kDa–0.45 μm) dominant species, representing 52–71% TCHO followed by low-molecular-weight (LMW-CHO,
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