2013年和2011年夏季南黄海和东海表层悬浮颗粒物中生物标志物的对比分析  

Contrastive Analysis of Biomarkers in Suspended Particles in the Southern Yellow Sea and East China Sea Between the Summer of 2013 and 2011

作　　者：陈曦[1] 毕蓉[1] 张海龙[1] 赵美训[1] 

机构地区：[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

出　　处：《中国海洋大学学报（自然科学版）》2017年第8期103-111,共9页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(415210647)资助~~

摘　　要：分析了2013年夏季南黄海和东海39个站位的表层颗粒物样品,获得菜子甾醇、甲藻甾醇和长链烯酮含量及其分布趋势。通过对比2013和2011年夏季南黄海和东海结果,发现三种生物标志物的含量及其分布趋势大体一致。菜子甾醇、生物标志物总量(∑PB)和叶绿素a的高值区与长链烯酮的低值区出现在长江口外海域,说明研究海域生产力高值区在长江口外附近海域;且进一步的分析表明,营养盐是调控生产力分布的主要因素。在相同站位,2013年三种类脂生物标志物含量总和是2011年的2.3倍,这主要是因为2013年较大的长江冲淡水水量带来了较多的营养盐。另外,2013年东亚夏季风较强,加强了长江冲淡水向外海扩散,所以2013年生产力高值区比2011年略靠近东北方向的外海。2013年菜子甾醇、甲藻甾醇和长链烯酮与∑PB比值的高值区分别出现在长江口外海域、长江口外东南海域和南黄海中部海域,表明硅藻和甲藻在生产力较高的长江口附近海域生长占优势,而定鞭藻在生产力较低的南黄海中部生长占优势。通过对2013年和2011年夏季南黄海和东海生物标志物的对比分析,证明了生物标志物不仅可以准确指示浮游植物生产力和群落结构,而且可以有效地指示浮游植物生产力和群落结构年际间的变化。Three lipid biomarkers, brassicasterol, dinosterol and C37 alkenones, were analyzed in sur- face suspended particles in the southern Yellow Sea （SYS） and East China Sea （ECS） in the summer of 2,013 and 2011. The distribution patterns of lipid biomarkers were broadly similar between the two years. High-value areas of brassicasterol, the sum of biomarkers （∑PB） and chlorophyll-a, and low- value areas of C37 alkenones occurred in the adjacent areas of the Changjiang River Estuary （CRE）. Our results indicate that productivity in the study area was mainly regulated by nutrients. At the same sta- tions, ∑PB in 2013 was up to 2.3 times higher than that in 2011, with the higher productivity induced by the high nutrients of the larger runoff of the Changjiang Diluted Water （CDW） in 2013. In addition, the stronger East Asian summer monsoon in 2013 strengthened the diffusion of CDW and thus higher productivity. High-value areas of brassicasterol/∑PB, dinosterol/∑PB and C37 alkenones/∑PB oc- curred in the adjacent areas of the CRE, the southeastern of CRE and the central SYS in 2013, respec- tively. The distribution patterns were broadly similar with those in 2011. The results indicate the domi- nance of diatoms and dinoflagellates in the adjacent areas of the CRE with higher productivity, but coc- colithophores in the central SYS with lower productivity. This study provides strong evidence not only for the accuracy of lipid biomarkers as proxies for phytoplankton productivity and community structure but also for their potential to be used to distinguish inter-annual variations of phytoplankton in the SYS and ECS.

关 键 词：生物标志物 南黄海和东海 浮游植物 生产力 群落结构 

分 类 号：P734[天文地球—海洋化学]