草型湖泊叶绿素a浓度时空分布特征及其与氮磷浓度关系
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草型湖泊叶绿素a 浓度时空分布特征
及其与氮磷浓度关系
*
冯伟莹
1,2
张生
1
王圣瑞
2
焦立新
2
王利明
1
崔凤丽
1
付绪金
1
杨芳
1
(1.内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018;2.环境基准与风险评估国家重点实验室/
中国环境科学研究院湖泊生态环境创新基地/国家环境保护湖泊污染控制重点实验室,北京100012)
摘要:采用2006—2010年5—10月份乌梁素海监测数据,对叶绿素a 浓度的时空分布特征及其与总氮、总磷浓度相关关系进行了分析。结果表明:乌梁素海叶绿素a 浓度具有明显的时空分布差异性:在时间上,呈现出明显的季节性变化,5、6、9、10月份叶绿素a 浓度较高,7、8月份叶绿素a 浓度偏低,秋季≈春季>夏季,最高值出现在2007年9月,均
值为9.01mg /m 3,
最低值出现在2010年7月,均值为1.80mg /m 3;在空间上,南北部叶绿素a 浓度以7.78mg /m 3为界,
呈现北部区>南部区的趋势。通过叶绿素a 与总氮、总磷浓度相关性分析得出,2006年5月叶绿素a 与总氮、总磷(r =0.7450、0.7596)、2008年5月叶绿素a 与总磷(r =0.5421)、2010年5月叶绿素a 与总氮(r =0.5089)存在较好的相关性。
关键词:线性回归方程;相关性;时空差异
DOI :10.7617/j.issn.1000-8942.2013.04.032
SPACE-TIME DISTRIBUTION OF CHLOROPHYLL-a AND ITS RELATIONSHIP
WITH TN AND TP CONCENTRATIONS IN PLANT TYPE LAKE
Feng Weiying 1,
2
Zhang Sheng 1Wang Shengrui 2Jiao Lixin 2Wang Liming 1Cui Fengli 1Fu Xujin 1Yang Fang 1
(1.College of Water Conservancy and Civil Engineering ,Inner Mongolia Agricultural University ,Hohhot 010018,China ;2.State Key
Laboratory of Environmental Criteria and Risk Assessment ,Research Center of Lake Eco-Environment ,Chinese Research
Academy of Environmental Sciences ,State Environmental Protection Key Laboratory for Lake Pollution Control ,
Beijing 100012,China )
Abstract :Based on the monitoring data from May to October in 2006—2010,the spatial-temporal distribution of chlorophyll-a concentrations and its relationship with and TN and TP concentrations were analyzed.The results showed that chlorophyll-a concentrations significantly change with both time and space ,being timely higher in May ,June ,September and October ,lower in July and August ,concentrations in spring and autumn were higher than those in summer ,the maximum value occurred in september ,2007with an average of 9.01mg /m 3,and the minimum value in July ,2010with an average of 1.80mg /m 3;and spatially they were decreasing from the north to the south ,with the border of 7.78mg /m 3.The correlation between chlorophyll-a with TN ,TP demonstrated evidently in May of 2006(r =0.7450,0.7596),the correlation between chlorophyll-a with TP demonstrated evidently in May of 2008(r =0.5421),the correlation between chlorophyll-a with TN demonstrated evidently in May of 2010(r =0.5089).
Keywords :linear regression equation ;correlation ;spatial-temporal change
*国家自然科学基金项目(51269016,51269017,U1202235,41103070);内蒙古自治区重大科技项目(20091408)。
0引言
湖泊富营养化是由于过量的营养物输入湖泊,导
致藻类等浮游植物大量繁殖,水质变坏,进而引起湖泊生态系统的一系列变化[1]
。叶绿素a 最能表现水体富
营养化状态进程,也是浮游植物现存量的重要指标之
一
[2]
。近两年,虞英杰[3]
等提出了一种基于微粒群