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引用本文:张雷,古小治,王兆德,申秋实,范成新,钟继承,尹洪斌.水丝蚓(Tubificid worms)扰动对磷在湖泊沉积物-水界面迁移的影响.湖泊科学,2010,22(5):666-674. DOI:10.18307/2010.0507
ZHANG Lei,GU Xiaozhi,WANG Zhaode,SHEN Qiushi,FAN Chengxin,ZHONG Jicheng,YIN Hongbin.The influence of Tubificid worms bioturbation on the exchange of phosphorus across sediment-water interface in lakes. J. Lake Sci.2010,22(5):666-674. DOI:10.18307/2010.0507
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水丝蚓(Tubificid worms)扰动对磷在湖泊沉积物-水界面迁移的影响
张雷1,2, 古小治1,2, 王兆德1,2, 申秋实1,2, 范成新1, 钟继承1, 尹洪斌1
1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.中国科学院研究生院, 北京 100049
摘要:
为探讨水丝蚓(Tubificid worms)扰动对磷在湖泊沉积物-水界面间迁移的影响, 选取太湖梅梁湾与大浦口两富营养化湖区为研究对象, 通过室内培养实验, 利用Rhizon间隙水采样器等技术, 研究了水丝蚓扰动对太湖沉积物-水界面理化性质及溶解活性磷(SRP)在界面通量的影响.结果表明水丝蚓扰动能够增大表层沉积物含水率、氧化还原电位, 减小间隙水中Fe2+浓度.水丝蚓没有显著改变梅梁湾间隙水中SRP浓度, 同时促进了梅梁湾沉积物中SRP向上覆水的释放;但水丝蚓显著减小了大浦口间隙水中SRP浓度, 并抑制了大浦口沉积物中SRP向上覆水的释放.水丝蚓扰动对磷在沉积物-水界面间迁移的不同影响可能是由沉积物中Fe2+含量差异较大造成的.
关键词:  生物扰动  磷迁移  二价铁  太湖  水丝蚓  梅梁湾  大浦口
DOI:10.18307/2010.0507
分类号:
基金项目:国家自然科学基金项目(40730528、50979102);江苏省社会发展项目(BE2009603);江苏省自然科学基金项目(BK2009332)联合资助
The influence of Tubificid worms bioturbation on the exchange of phosphorus across sediment-water interface in lakes
ZHANG Lei1,2, GU Xiaozhi1,2, WANG Zhaode1,2, SHEN Qiushi1,2, FAN Chengxin1, ZHONG Jicheng1, YIN Hongbin1
1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Abstract:
To examine the effects of bioturbation of Tubificid worms on phosphorus exchange across sediment-water interface in lakes, the laboratory incubation experiments were carried out with sediments and lake water from Meiliang Bay and the estuary of Dapu River in Lake Taihu. Rhizon samplers were used to acquire pore water. Tubificid worms increased sediment water content and redox potential in surface sediment, and decreased Fe2+ in pore water. For sediment from Meiliang Bay, the Tubificid worms did not altered significantly SRP in pore water, while accelerated SRP release from sediment to overlying water. But for sediment from the estuary of Dapu River, Tubificid worms decreased SRP in pore water and inhibited SRP release from sediment to overlying water. It suggested that ferrous iron may play an important role in explaining different results.
Key words:  Bioturbation  phosphorus exchange  ferrous iron  Lake Taihu  Tubificid worms  Meiliang Bay  Dapu River
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