黄渤海海水中叶绿素a的分布特征及其环境影响因素

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Abstract

The distribution characteristics of chlorophyll-a (Chl-a) and the related environmental factors (T, S, pH, DIN, SiO₃^2--Si, PO₄^3--P) were examined for seawater samples obtained from the Yellow Sea (YS) and the Bohai Sea (BS) in the summer of 2013, the autumn of 2013 and the spring of 2014. The results showed that Chl-a concentration ranged 0.918~9.28μg/L in the summer of 2013 with an average of 3.527μg/L, 1.837~5.966μg/L in the autumn of 2013 with an average of 3.524μg/L and 1.477~6.435μg/L in the spring of 2014 with an average of 3.467μg/L; Chl-a spatial distribution showed a decreasing trend from inshore area to offshore area; The GA-SVM model was used to investigate the Chl-a response relationship with the above environmental factors and the results confirmed the good performance (R²>0.9, MSE<0.01). The influence of parameters on the distribution of Chl-a had a significant seasonal variation. The two most significant variables to the distribution of Chl-a were PO₄^3--P and T in summer, SiO₃^2--Si and S in autumn, S and PO₄^3--P in spring and S and PO₄^3--P in all three seasons which demonstrated that the terrestrial input were most tightly related to the distribution of Chl-a in the BS and the YS.

Key words： Bohai Sea and Yellow Sea chlorophyll a correlation analysis support vector machine

Received: 18 April 2017

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X55

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	Articles by authors
	ZHOU Yan-lei
	ZHANG Chuan-song
	SHI Xiao-yong
	SU Rong-guo

Cite this article:

ZHOU Yan-lei,ZHANG Chuan-song,SHI Xiao-yong等. Distribution characteristics of chlorophyll a and its influencing environmental factors in Bohai Sea and Yellow Sea[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(11): 4259-4265.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I11/4259

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