秦皇岛海域微微型藻华期间叶绿素a分级研究

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摘要

2011年6月秦皇岛北戴河海域暴发微微型浮游植物赤潮,对北戴河海域进行了3次海域调查,探讨和分析了秦皇岛海域赤潮暴发期间的6月和非赤潮期间的7、8月表层浮游植物的粒级结构分布特征,并对环境因子进行了相关影响分析.赤潮期间整个调查海域范围内叶绿素a(Chl.a)平均含量为10.85±5.13μg/L,非赤潮期间7月、8月Chl.a的平均含量为5.50±3.60μg/L.赤潮期间和非赤潮期间各粒级浮游植物Chl.a含量对Chl.a总量的贡献率有所差异,赤潮期间6月小型(Microphytoplankton,>20μm)、微型(Nanophytoplankton,2～20μm)和微微型(Picophytoplankton,0.74～2μm)浮游植物对总Chl.a的贡献率分别为2.1%、48.3%和49.6%.非赤潮期间7月小型、微型、微微型对总Chl.a的贡献率分别为14.4%、51.6%、24.0%.通过浮游植物粒径分级Chl.a和环境因子的相关性分析,发现在赤潮期间调查海域浮游植物Chl.a与硝酸盐的相关性系数随着浮游植物粒径的增大而从负逐渐变正.发现在非赤潮区微型和微微型浮游植物与OD显著正相关(p<0.01).

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	张勇
	张永丰
	张万磊
	张建乐
	段金华
	李丽
	吕颂辉

关键词 ：叶绿素a, 粒径分级, 微微型浮游植物, 秦皇岛

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

收稿日期: 2012-08-25

Q176

基金资助:国家海洋局海域使用金项目资助;国家科技部973项目(2010CB428702)资助

引用本文:

张勇1, 张永丰3,4, 张万磊3,4, 张建乐3,4, 段金华2, 李丽1, 吕颂辉1*. 秦皇岛海域微微型藻华期间叶绿素a分级研究[J]. , 2012, 31(4): 357-363.
ZHANG Yong1, ZHANG Yong-feng 3,4, ZHANG Wan-lei3,4, ZHANG Jian-le3,4, DUAN Jin-hua2, LI Li1, LU Song-hui1. Size fraction of chlorophyll a during and after brown tide in Qinhuangdao coastal waters. , 2012, 31(4): 357-363.

链接本文:

http://www.ecolsci.com/CN/Y2012/V31/I4/357

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