人类活动影响下唐山湾近岸海域营养盐及其结构变化

发布时间：2018-02-27 01:02

本文关键词： 营养盐结构主成分分析水质唐山湾　出处：《应用生态学报》2016年01期 　论文类型：期刊论文

【摘要】：根据获取的唐山湾海域1995-2012年25个站位现场观测数据和资料,基于主成分分析(PCA)对人类活动影响下唐山湾海域营养盐及其结构变化进行研究.结果表明:在人类活动影响下,近20年唐山湾海域无机氮(DIN)呈现明显的增长趋势,磷酸盐(PO_4~(3-)-P)、硅酸盐(SiO_3~(2-)-Si)则呈下降趋势;平均N:P由1995年的3.0增长到2012年的26.0,而Si:N则呈下降趋势,海水营养盐结构发生了明显的变化.据此利用主成分分析识别水质变化,共提取了2个主成分,第1主成分以DIN、NO_3~--N、NH_4~+-N、PO_4~(3-)-P和NO_2~--N为代表,解释了71.5%的方差;第2主成分以叶绿素(Chl a)和SiO_3~(2-)-Si为代表,解释了21.8%的方差,说明唐山湾水质变化主要与DIN、PO_4~(3-)-P因子变化关系密切.2个主成分得分揭示了人类活动影响下唐山湾水质年际变化趋势,即由1995-2005年开发前及开发初期的N限制向2007年开发后的P限制转变.人类活动影响下唐山湾海域营养盐及其结构已经发生了明显变化,这种变化尤其是无机氮含量的增加,需要引起高度关注.
[Abstract]:Based on the field observation data and data obtained from 25 stations in Tangshan Bay from 1995 to 2012, and based on principal component analysis (PCAA), the nutrients and their structural changes in Tangshan Bay were studied under the influence of human activities. The results show that: under the influence of human activities, In the last 20 years, the inorganic nitrogen (din) in Tangshan Bay area showed an obvious increasing trend, while the phosphate PO4 and SiO3 / SiO3 / -Si) showed a decreasing trend, while the average N: P increased from 3. 0 in 1995 to 26. 0 in 2012, while the Si:N showed a downward trend, and the average N: P increased from 3. 0 in 1995 to 26. 0 in 2012, while the average N: P increased from 3. 0 to 26. 0 in 2012. The structure of nutrient salt in seawater has changed obviously. Based on the principal component analysis, two principal components have been extracted. The first principal component is represented by DINONO3- Nine NH4- NPO4P and NO_2~--N, and the variance of 71.5% is explained. The second principal component, with chlorophyll Chlla and SiO_3~(2-)-Si as the representative, explained the variance of 21.8%, which indicated that the variation of water quality in Tangshan Bay was mainly related to the variation of DINPPO4 / 3-P factor, and the two principal component scores revealed the interannual variation trend of water quality in Tangshan Bay under the influence of human activities. That is, from the N restriction before and at the beginning of the development from 1995 to 2005 to the P limitation after the development in 2007. Under the influence of human activities, the nutrients and their structure in Tangshan Bay have changed obviously, especially the increase of inorganic nitrogen content. It needs high attention.
【作者单位】：河北农业大学海洋学院;中国环境管理干部学院;
【基金】：河北省应用基础研究计划重点项目(13963302D;15963301D) 河北省创新能力提升计划项目(154576235) 海洋公益性行业科研专项(201005009)资助~~
【分类号】：X55

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