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引用本文:杨文斌,王国祥.南京玄武湖菹草种群的环境效应.湖泊科学,2007,19(5):572-576. DOI:10.18307/2007.0512
YANG Wenbin,WANG Guoxiang.Environmental effects of Potamogeton crispus population in Lake Xuanwu, Nanjing. J. Lake Sci.2007,19(5):572-576. DOI:10.18307/2007.0512
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南京玄武湖菹草种群的环境效应
杨文斌1,2, 王国祥1
1.南京师范大学地理科学学院, 江苏省环境演变与生态建设重点实验室, 南京 210046;2.安徽师范大学环境科学学院, 芜湖 241000
摘要:
为了解玄武湖菹草种群的环境效应, 对玄武湖2006年春季水质变化、菹草区内外水质差异进行了监测, 并分析了2003-2006年春季水质监测资料, 结果表明:菹草区DO高于菹草-水交界区及开阔水域;从菹草区到菹草—水交界区、开阔水域TP、TN逐渐升高, TP均值分别为0.062、0.098、0.105mg/L, TN均值分别为1.674、2.202、2.412mg/L;与2003-2005年同期均值相比, 2006年3-5月份TP分别下降了15.4%、45%、43.3%, TN分别下降58.2%、43.9%、51.3%, SD保持在65cm以上;说明菹草在改善湖泊环境和净化水质方面有重要作用。最后提出了改善、维持玄武湖健康稳定水生生态系统的措施和建议。
关键词:  玄武湖  菹草(Potamogeton crispus L.)  环境效应
DOI:10.18307/2007.0512
分类号:
基金项目:国家“十五”“211”工程重大项目“不同时空尺度环境演变和生态建设”、国家“863”“十五”重大科技专项(2003AA601100-2);江苏省重点科技专项(BM2002701)联合资助
Environmental effects of Potamogeton crispus population in Lake Xuanwu, Nanjing
YANG Wenbin1,2, WANG Guoxiang1
1.School of Geography Science, Nanjing Normal University, Nanjing 210046, P. R. China;2.College of Environmental Science, Anhui Normal University, Wuhu 241000, P. R. China
Abstract:
To investigate the environmental effects of Potamogeton crispus population in Lake Xuanwu, water quality in and out Potamogeton crispus population area were monitored from January to June of 2006, and were compared from 2003 to 2006 in Lake Xuanwu. The results showed :1) From P. crispus population area to open water area, concentration of DO gradually decreased; 2)From u P. crispus population area”, “transition area” to “open water area”, concentration of TP and TN increased gradually. Average concentration of TP in those area were 0.062, 0.098 and 0.105 mg/L respectively, and average concentration of TN in those area were 1.674, 2.202 and 2.412mg/L respectively; 3) TP concentration from March to May in 2006 decreased by 15.4%, 45% and 43.3%, compared with the same months from 2003 to 2005; these told us that Potamogeton crispus population had vital roles in improving lake environment and purifying water quality. Finally, some suggestions about improving and maintaining stable aquatic ecosystems of Lake Xuanwu were put forward in the article.
Key words:  Lake Xuanwu  Potamogeton crispus L.  environmental effect
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