秦皇岛海域微微型藻华期间叶绿素a分级研究

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Abstract

Picophytoplankton algal blooms occurred in Qinhuangdao coastal water in June 2011.Three cruises were carried out during and after the bloom,and size fraction of chlorophyll a and marine environmental factors were investigated in June to August of 2011 in the area.The average values of Chlorophyll a in non-bloom period and bloom period was 10.85±5.13μg/L and 5.50±3.60μg/L, respectively.The surface distribution of size fractioned phytoplankton in the area was discussed.The correlations of the size fractionated chlorophyll a with the environmental factors were also studied.The results showed that the chlorophyll a of microplankton(>20μm), nanoplankton(2-20μm)and picoplankton(0.74-2μm)accounted on average for 2.1%,48.3% and 49.6% of the total chlorophyll a in the whole investigated sea area respectively in June.In July,the chlorophyll a of microplankton,nanoplankton and picoplankton accounted on average for 14.4%,51.6% and 24.0%,respectively.Correlation analysis of size fractionated chlorophyll a with environmental factors revealed that the correlation coefficients of nitrate with size fractionated chlorophyll a varied from negative to positive with the increase of the cell size in the investigated sea in June.Nanoplankton and picoplankton were significantly and positively related with DO(p<0.01).

Key words： Chlorophyll a size fractioning picophytoplankton Qinhuangdao

Received: 25 August 2012

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	Articles by authors
	ZHANG Yong
	ZHANG Yong-feng
	ZHANG Wan-lei
	ZHANG Jian-le
	DUAN Jin-hua
	LI Li
	LU Song-hui

Cite this article:

ZHANG Yong,ZHANG Yong-feng,ZHANG Wan-lei, et al. Size fraction of chlorophyll a during and after brown tide in Qinhuangdao coastal waters[J]. , 2012, 31(4): 357-363.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2012/V31/I4/357

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