| Variation of reactivity of particulate and sedimentary organic matter along the Zhujiang River Estuary |
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| 作者姓名： | Chen Jianfang Jin Haiyan Yin Kedong Li Yan |
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| 作者单位： | Chen Jianfang 1，2，Jin Haiyan 1，2，Yin Kedong3，Li Yan 1，2 1. Key Laboratory of Submarine Geosciences of State Oceanic Administration，Hangzhou 310012，China. 2. Laboratory of Regional Oceanography，Second Institute of Oceanography，State Oceanic Aedministration，Hangzhou，310012，China 3. Department of Biology，Hong Kong University of Science and Technology，Hong Kong |
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| 基金项目： | ThisresearchwassupportedbytheJackyClubofHongKong (preppProject) ,NKBRSFProjectundercontractNo .G2 0 0 0 785 0 0andNationalNaturalScienceFoundationofChinaundercontractNo 4 0 10 6 0 0 4 |
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| 摘 要： | To investigate organic matter source and reactivity in the Zhujiang River (Pearl River)Estuary and its adjacent areas, particulate organic carbon (POC), particulate hydrolysable amino acids (PHAA), and Chl a during two cruises in July 1999 and July 2000 were measured. The highest POC and PHAA concentration was observed in the waters with maximum Chl a. The spectra distribution,relative content (dry weight in milligram per gram), PHAA-C% POC and other indicators such as the ratios of amino acids vs. amino sugars (AA/AS) and glucosamine vs. galactosamine (Glum/Gal) suggested that particulate amino acids in the water column and sediments in the Zhujiang River Estuary were mainly derived from biogenic processes rather than transported from terrestrial erosion. In inner estuary where high turbidity was often observable, organic matter was mainly contributed by re-suspension of bottom sediments with revealed zooplankton, microbial reworked characteristics, which suggest that these organic matters were relatively “old“. In the estuarine brackish region, organic matter in water column is mainly contributed by relatively fresh, easily degradable phytoplankton derived organic matter.During physical - biological processes within the eastuary, organic matter derived from phytoplankton was subjected to alteration by zooplankton grazing and bacterial reworking.
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| 关 键 词： | Organic matter reactivity amino acids the Zhujiang River Estuary |
| 收稿时间： | 4/6/2003 12:00:00 AM |
| 修稿时间： | 2003/10/12 0:00:00 |
Variation of reactivity of particulate and sedimentary organic matter along the Zhujiang River Estuary |
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| Chen Jianfang,Jin Haiyan,Yin Kedong,Li Yan.Variation of reactivity of particulate and sedimentary organic matter along the Zhujiang River Estuary[J].Acta Oceanologica Sinica,2003,22(4):557-568. |
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| Authors: | Chen Jianfang Jin Haiyan Yin Kedong and Li Yan |
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| Institution: | 1.Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China;Laboratory of Regional Oceanography, Second Institute of Oceanography, State Oceanic Aedministration, Hangzhou, 310012, China2.Department of Biology, Hong Kong University of Science and Technology, Hong Kong |
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| Abstract: | To investigate organic matter source and reactivity in the Zhujiang River (Pearl River)Estuary and its adjacent areas, particulate organic carbon (POC), particulate hydrolysable amino acids (PHAA), and Chl a during two cruises in July 1999 and July 2000 were measured. The highest POC and PHAA concentration was observed in the waters with maximum Chl a.The spectra distribution, relative content (dry weight in milligram per gram), PHAA-C%POC and other indicators such as the ratios of amino acids vs. amino sugars (AA/AS)and glucosamine vs. galactosamine (Glum/Gal)suggested that particulate amino acids in the water column and sediments in the Zhujiang River Estuary were mainly derived from biogenic processes rather than transported from terrestrial erosion. In inner estuary where high turbidity was often observable, organic matter was mainly contributed by re-suspension of bottom sediments with revealed zooplankton, microbial reworked characteristics,which suggest that these organic matters were relatively "old". In the estuarine brackish region, organic matter in water column is mainly contributed by relatively fresh, easily degradable phytoplankton derived organic matter. During physical-biological processes within the eastuary, organic matter derived from phytoplankton was subjected to alteration by zooplankton grazing and bacterial reworking. |
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| Keywords: | Organic matter reactivity amino acids the Zhujiang River Estuary |
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