| 太湖沉积物孔隙水无机氮空间变化特征 |
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| 引用本文： | 王锋文,钟萍,刘正文.太湖沉积物孔隙水无机氮空间变化特征[J].生态科学,2011,30(3):340-345. |
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| 作者姓名： | 王锋文 钟萍 刘正文 |
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| 作者单位： | 1. 暨南大学水生生物研究中心, 广州 510632; 2. 中国科学院南京地理与湖泊研究, 南京 210008 |
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| 基金项目： | 国家973项目-湖泊蓝藻水华生态灾害形成机理及防治的基础研究 |
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| 摘 要： | 采集太湖不同生态类型湖区(草型湖区胥口湾;风浪大、水华较少的湖心区和水华较严重的梅梁湾)沉积物柱状样,研究沉积物理化性质以及孔隙水无机氮浓度垂直变化特征。结果显示,各点含水率、有机质、总氮均随深度增加而降低,而梅梁湾含量最高,湖心区最低。沉积物溶解氧随深度增加而降低,胥口湾最高,梅梁湾最低。孔隙水NH4+-N随深度增加而增大,NO3--N、NO2--N均随随深度增加而减小。比较表层0-5cm沉积物孔隙水和上覆水无机氮浓度,发现各湖区NO3--N和NO2--N释放风险小,胥口湾(草型湖区)和梅梁湾(藻型湖区)NH4+-N释放风险较大,湖心区较小。
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| 关 键 词： | 溶解氧 孔隙水无机氮 湖区类型 太湖 |
| 收稿时间： | 2011-06-25 |
Spatial variation of porewater inorganic nitrogen in Lake Taihu,China |
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| WANG Feng-Wen,ZHONG Ping,LIU Zheng-Wen.Spatial variation of porewater inorganic nitrogen in Lake Taihu,China[J].Ecologic Science,2011,30(3):340-345. |
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| Authors: | WANG Feng-Wen ZHONG Ping LIU Zheng-Wen |
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| Institution: | WANG Feng-Wen~1,ZHONG Ping~(1,2),LIU Zheng-Wen~(1,2*) 1.Institute of Hydrobiology,Jinan University,Guangzhou 510632,China 2.Institute of Geography and Limnology,CAS,Nanjing 210008,China |
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| Abstract: | Sediment cores were collected in different areas with different ecological states in Lake Taihu to observe vertical variation in physicochemical characteristics of sediments and porewater inorganic nitrogen.The three areas were Xukou Bay dominated by macrophytes,Central Lake with strong wave and less algal bloom,Meiliang Bay with severe algal bloom.The results showed that water content,organic matter,and TN decreased with increasing sediment depth in the three sampling sites,with the highest values observed... |
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| Keywords: | Dissolved oxygen porewater inorganic nitrogen Ecological type of lake Lake Taihu |
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