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引用本文:杨威,邓道贵,张赛,谢平,过龙根,王圣瑞.洱海叶绿素a浓度的季节动态和空间分布.湖泊科学,2012,24(6):858-864. DOI:10.18307/2012.0608
YANG Wei,DENG Daogui,ZHANG Sai,XIE Ping,GUO Longgen,WANG Shengrui.Seasonal dynamic and spatial distribution of chlorophyll-a concentration in Lake Erhai. J. Lake Sci.2012,24(6):858-864. DOI:10.18307/2012.0608
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洱海叶绿素a浓度的季节动态和空间分布
杨威1, 邓道贵1, 张赛1, 谢平2, 过龙根2, 王圣瑞3
1.淮北师范大学生命科学学院, 资源植物生物学安徽省重点实验室, 淮北 235000;2.中国科学院水生生物研究所, 武汉 430072;3.中国环境科学研究院, 北京 100012
摘要:
2010年5月至2011年4月,对洱海叶绿素a的季节动态、空间分布及其与环境因子的关系进行研究.结果表明,水体中叶绿素a浓度存在明显的季节变化,其变化范围为4.11~24.30μg/L,年平均值为10.4±6.5μg/L,最小值出现在2011年3月,最大值出现在2010年9月.叶绿素a浓度在夏、秋季较高,冬、春季较低.在空间变化上,叶绿素a浓度在南部湖区最大,其次是北部湖区,中部湖区最低.Pearson相关系数和主成分分析表明,洱海叶绿素a浓度在不同湖区中与水温和透明度均呈极显著相关.总氮在北部和南部湖区与叶绿素a浓度均存在一定的相关性,而总磷与叶绿素a浓度在南部湖区存在一定的相关性.根据修正的卡尔森营养状态指数,洱海综合TSI值为50.6,水质处于中营养状态.
关键词:  洱海  叶绿素a  总氮  总磷  季节动态  空间分布
DOI:10.18307/2012.0608
分类号:
基金项目:国家水体污染控制与治理科技重大专项项目(2008ZC07105-005)资助
Seasonal dynamic and spatial distribution of chlorophyll-a concentration in Lake Erhai
YANG Wei1, DENG Daogui1, ZHANG Sai1, XIE Ping2, GUO Longgen2, WANG Shengrui3
1.School of Life Science, Huaibei Normal University, Anhui Key Laboratory of Resource and Plant Biology, Huaibei 235000, P. R. China;2.Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China;3.Chinese Research Academy of Environmental Sciences, Beijing 100012, P. R. China
Abstract:
Seasonal dynamics and spatial distributions of chlorophyll-a concentration and its relationship to environmental factors in Lake Erhai from May 2010 to April 2011 were investigated. Results showed that the seasonal dynamics of chlorophyll-a concentration in Lake Erhai were obvious, ranging from 4.11 to 24.30 μg/L and with the annual mean value 10.4 ± 6.5 μg/L. The minimum and maximum of chlorophyll-a concentration appeared in March and September, respectively. The chlorophyll-a concentrations were much higher in summer and autumn while relatively lower in winter and spring. Spatially, chlorophyll-a concentrations were the highest in the southern zones of the lake, followed by the northern and the middle zones. Pearson correlations and principal component analysis suggested that the chlorophyll-a concentration has negative correlation with transparency in different zones of Lake Erhai, while has positive correlation with water temperature. The chlorophyll-a concentration was correlated significantly with total nitrogen in the northern and southern zones of Lake Erhai, while correlated with total phosphorus in southern zones. Based on the modified Carlson trophic state index, the comprehensive TSI was 50.6 in Lake Erhai, indicating a mesotrophic state.
Key words:  Lake Erhai  chlorophyll-a  total nitrogen  total phosphorus  seasonal dynamic  spatial distribution
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