Analysis of eutrophication characteristics in Dongshan Bay based on PCA

JIANG Shuang-cheng; LIN Pei-mei; CAI Yu-ting; ZHENG Sheng-hua; CAI Jian-di; XU Cui-ya; YANG Miao-feng; XI Ying-yu; ZHONG Shuo-liang

doi:10.3969/j.issn.1001-909X.2015.01.012

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Journal of Marine Sciences ›› 2015, Vol. 33 ›› Issue (1) : 81-88. DOI: 10.3969/j.issn.1001-909X.2015.01.012

Analysis of eutrophication characteristics in Dongshan Bay based on PCA

JIANG Shuang-cheng¹, LIN Pei-mei², CAI Yu-ting¹, ZHENG Sheng-hua¹, CAI Jian-di¹, XU Cui-ya¹, YANG Miao-feng¹, XI Ying-yu¹, ZHONG Shuo-liang¹

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Abstract

According to the investigation results of Dongshan Bay and its adjacent sea area in May and August 2011, DIN、DSi、SRP、TN、TP、COD、DOC、TOC、Chl-a and total abundance of phytoplankton associated with eutrophication were analyzed with principal component analysis(PCA).Three principal components (PCs) were extracted with principal component analysis: phytoplankton、TP and COD for PC1, N nutrients and silicon nutrients for PC2 and P nutrients for PC3. Distribution of PC1、PC2、PC3 and CPC in spring and summer show the high eutrophication risk regions, where were Zhangjiang Estuary and Bachimen adjacent areas. The correlation analysis with salinity showed that eutrophication pressure was mainly from Zhangjiang in Dongshan Bay, and enhanced in summer. COD and phytoplankton are dominating factors in assessing the variation of eutrophication in Dongshan Bay and its adjacent area.

Key words

eutrophication / principal component analysis / regression analysis / Dongshan Bay

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JIANG Shuang-cheng, LIN Pei-mei, CAI Yu-ting, ZHENG Sheng-hua, CAI Jian-di, XU Cui-ya, YANG Miao-feng, XI Ying-yu, ZHONG Shuo-liang. Analysis of eutrophication characteristics in Dongshan Bay based on PCA[J]. Journal of Marine Sciences. 2015, 33(1): 81-88 https://doi.org/10.3969/j.issn.1001-909X.2015.01.012

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