2009年冬季南海北部生物标志物对表层浮游植物生物量/群落结构的指示作用

doi:10.11978/j.issn.1009-5470.2012.04.013

热带海洋学报 ›› 2012, Vol. 31 ›› Issue (4): 96-103.doi: 10.11978/j.issn.1009-5470.2012.04.013cstr: 32234.14.j.issn.1009-5470.2012.04.013

2009年冬季南海北部生物标志物对表层浮游植物生物量/群落结构的指示作用

李玉红¹,², 赵美训¹,², 张海龙¹,², 邢磊¹,², 杨红梅¹,², 戴民汉³, 王磊³

1. 中国海洋大学海洋化学理论与工程技术教育部重点实验室, 山东青岛 266100;
2．中国海洋大学海洋有机地球化学研究所, 山东青岛 266100;
3．厦门大学近海海洋环境科学国家重点实验室, 福建厦门 361005

收稿日期:2010-11-11 修回日期:2011-02-20 出版日期:2012-10-22 发布日期:2012-10-24
通讯作者: 通信作者: 赵美训(1959—), 男, 山东省莱阳市人, 教授, 主要从事海洋有机地球化学研究。E-mail: maxzhao@ouc.edu.cn
作者简介:李玉红(1987—), 男, 山西省高平市人, 硕士研究生, 从事海洋有机地球化学研究。E-mail:gohong@yeah.net
基金资助:
国家重点基础研究发展计划项目(2007CB815934、2009CB421201); 国家自然科学基金项目(40776029)

Phytoplankton biomarkers in surface seawater from the northern South China Sea in summer 2009 and their potential as indicators of biomass/community structure

LI Yu-hong¹,², ZHAO Mei-xun¹,², ZHANG Hai-long¹,², XING Lei¹,², YANG Hong-mei¹,², DAI Min-han³, WANG Lei³

1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;
2. Institute of Marine Organic Geochemistry, Ocean University of China, Qingdao 266100, China;
3. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China

Received:2010-11-11 Revised:2011-02-20 Online:2012-10-22 Published:2012-10-24

摘要/Abstract

摘要：

生物标志物已被广泛应用于重建浮游植物生产力和群落结构变化。该方法假设之一是生标的含量可以反映表层海水的浮游植物生物量, 但这个假设还缺乏现场观测的充分验证。对2009年冬季南海北部表层海水颗粒物中主要生标做了分析, 利用其含量及比值研究浮游植物的生物量及群落结构的分布。生标含量表明硅藻、甲藻、颗石藻的高值区位于珠江口南部及广东沿岸, 在陆坡区也有高值。生标比值显示硅藻在3个类群中的相对比例最高。其中, 甲藻/硅藻比值高值区位于陆坡区, 这与大洋水(黑潮)的入侵, 带来大量暖水性甲藻有很大关系; 颗石藻/硅藻比值总体趋势与生物量的分布相反, 在近岸少数站位有高值, 向外海逐渐增加, 主要是因为颗石藻更适于寡营养盐的环境。生标结果所指示的生物量及群落结构的空间分布与前人的调查结果类似, 为利用生标重建此区域的浮游植物生产力和群落结构变化提供了依据。

关键词: 南海北部, 浮游植物, 生物标志物, 生物量, 群落结构

Abstract:

Biomarkers have been widely used to reconstruct phytoplankton productivity based on the assumption that biomarker contents could reflect phytoplankton productivity in the surface seawater. However, this hypothesis has not been validated with modern survey. In this study, the contents and ratios of three phytoplankton biomarkers in the surface seawater of the northern South China Sea in winter 2009 were analyzed, to indicate spatial distributions of phytoplankton biomass and community structure. The results show high values for diatoms, dinoflagellates and coccolithophorids near the Pearl River Estuary and Guangdong coastal areas. The community structure indicates diatoms are the dominant phytoplankton species in winter. High values of dinoflagellate/diatom ratio occur near the slope area owing to intrusion of the Kuroshio, which favors the growth of dinoflagellates. The coccolithophorid/diatom ratio displays an increasing trend from the Pearl River Estuary to offshore region due to the advantage of coccolithophorids in oligotrophic environment, which is opposite to the productivity pattern of all biomarkers. These results are consistent with previous studies using phytoplankton cell and pigments, which provides support for the use of biomarker to reconstruct phytoplankton productivity and community structure in the SCS.

Key words: northern South China Sea, phytoplankton, biomarker, biomass, community structure

中图分类号:

Q178.53

李玉, 赵美训, 张海龙, 邢磊, 杨红梅, 戴民汉, 王磊. 2009年冬季南海北部生物标志物对表层浮游植物生物量/群落结构的指示作用[J]. 热带海洋学报, 2012, 31(4): 96-103.

LI Yu-hong, ZHAO Mei-xun, ZHANG Hai-long, XING Lei, YANG Hong-mei, DAI Min-han, WANG Lei. Phytoplankton biomarkers in surface seawater from the northern South China Sea in summer 2009 and their potential as indicators of biomass/community structure[J]. Journal of Tropical Oceanography, 2012, 31(4): 96-103.

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2009年冬季南海北部生物标志物对表层浮游植物生物量/群落结构的指示作用

Phytoplankton biomarkers in surface seawater from the northern South China Sea in summer 2009 and their potential as indicators of biomass/community structure

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