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| 淀山湖营养物输入响应关系的分位数回归分析 | |
| 引用本文： | 李小平,程曦,陈小华.淀山湖营养物输入响应关系的分位数回归分析[J].中国环境科学,2012,32(2):324-329. |
| 作者姓名： | 李小平 程曦 陈小华 |
| 作者单位： | 1. 华东师范大学河口海岸国家重点实验室,上海,200062 2. 上海市环境科学研究院,上海,200233 3. 华东师范大学河口海岸国家重点实验室,上海200062;上海市环境科学研究院,上海200233 |
| 基金项目： | 国家"十一五"科技重大专项"水体污染控制与治理"项目 |
| 摘 要： | 采用分位数回归方法研究了淀山湖富营养化输入(总氮和总磷)及响应指标(叶绿素a)之间的关系.结果表明,淀山湖营养物TP和TN(输入指标)对不同分位叶绿素a(响应指标)的影响不同.在低分位(0.10~0.50)时,淀山湖的藻类生物量(叶绿素a)主要受TP的控制;在高分位(0.60~0.90)时,淀山湖的藻类生物量同时受TP和TN的控制;TN对藻类生长的抑制作用随分位数升高而加强.0.60分位时是TP和TN对藻类增长影响发生变化的分位.普通最小二乘法(OLS)方法得到的经验方程,不能估计淀山湖多个因素不同变化速率对湖泊营养物输入响应关系的影响. |
| 关 键 词： | 分位数回归 最小二乘法 营养物输入与响应 叶绿素a 总氮 总磷 淀山湖 |
| 收稿时间： | 2011-05-08; |
A quantile regression for relationship between nutrient input and response of Dianshan Lake |
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| LI Xiao-ping , CHENG Xi , CHEN Xiao-hua.A quantile regression for relationship between nutrient input and response of Dianshan Lake[J].China Environmental Science,2012,32(2):324-329. | |
| Authors: | LI Xiao-ping CHENG Xi CHEN Xiao-hua |
| Institution: | 1,2(1.State Key Laboratory of Estuarine and Coastal Research,East China Normal University,Shanghai 200062,China;2.Shanghai Academy of Environmental Sciences,Shanghai 200233,China) |
| Abstract: | Quantile regression was used to estimate the relationships between nutrients(TP and TN) and their response(Chl a) of Dianshan Lake.The impacts of nutrients on Chla at the conditional quantiles were different.At lower quantile(0.10~0.50),algal biomass(Chl a) was mainly controlled by TP,while at upper quantile(0.60~0.90)algal biomass might depend on both TP and TN,inhibited effects of TN on algal growth increasing with higher quantiles.The 60th percentile might be the key for shifting limiting nutrient from TP to TN on algal growth.Ordinary least squares(OLS) regression cannot estimate multiple rates of change describing the relationship between nutrient input and response of Dianshan Lake. |
| Keywords: | quantile regression ordinary least squares nutrient input and response chlorophyll a TP TN Dianshan Lake |
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