Using chemometrics to evaluate anthropogenic effects in Daya Bay, China

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Using chemometrics to evaluate anthropogenic effects in Daya Bay, China
	Wu, ML ; Wang, YS
刊名	ESTUARINE COASTAL AND SHELF SCIENCE
	2007
卷号	72 期号:4 页码:732-742
关键词	Daya Bay principal component analysis water quality spatial and temporal patterns
ISSN号	0272-7714
通讯作者	linlinmei_wu@163.com
中文摘要	In this work, we have monitored 12 stations to study the effects caused by natural, marine and anthropogenic activities on water quality in Daya Bay, China. Results show that the N:P ratios are 71.54, 41.29, 81.50 and 98.27 in winter, spring, summer and autumn, respectively. Compared with the data of the past 20 years, the atomic N:P ratios have increased, indicating increased potential for P limitation; the atomic Si:N ratios have decreased; the nutrient structure has substantially changed over a period of 20 years. These findings show that the nutrient structure may be related to anthropogenic influence. The data matrix has been built according to the results, which were analyzed by principal component analysis (PCA). This analysis extracted the first four principal components (PC), explaining 73.58% of the total variance of the raw data. PC1 (25.53% of the variance) is associated with temperature, salinity and nitrate. PC2 (21.64% of the variance) is characterized by dissolved oxygen and silicate. PC3 (15.91% of the variance) participates mainly by nitrite (NO2-N) and ammonia (NH4-N). PC4 explaining 10.50% of the variance is mainly contributed by parameters of organic pollution (dissolved oxygen, 5-day biochemical oxygen demand and chemical oxygen demand). PCA has found the important factors that can describe the natural, marine and anthropogenic influences. Temperature and salinity are important indicators of natural and marine characters in this bay. The northeast monsoons from October to April and southwest monsoons from May to September have important effects on the waters in Daya Bay. It has been demonstrated that anthropogenic activities have significant influence on nitrogen form character. In spatial pattern, a marine aquaculture area and a non-aquaculture area are widely identified by the scores of stations. In seasonal pattern, dry and wet season characters have been demonstrated. (c) 2006 Elsevier Ltd. All rights reserved.
学科主题	Marine & Freshwater Biology; Oceanography
收录类别	SCI
原文出处	ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/5891]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Wu, ML,Wang, YS. Using chemometrics to evaluate anthropogenic effects in Daya Bay, China[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2007,72(4):732-742.
APA	Wu, ML,&Wang, YS.(2007).Using chemometrics to evaluate anthropogenic effects in Daya Bay, China.ESTUARINE COASTAL AND SHELF SCIENCE,72(4),732-742.
MLA	Wu, ML,et al."Using chemometrics to evaluate anthropogenic effects in Daya Bay, China".ESTUARINE COASTAL AND SHELF SCIENCE 72.4(2007):732-742.