西赤道太平洋暖池区光合色素分布及其对浮游植物群落的指示作用  

Distribution of photosynthetic pigments and its indication to phytoplankton community in warm pool of the western equatorial Pacific

作　　者：庄燕培[1] 金海燕[1] 陈建芳[1] 王奎[1] 徐燕青[1] 王斌[1] 

机构地区：[1]国家海洋局第二海洋研究所国家海洋局海洋生态系统与生物地球化学重点实验室,浙江杭州310012

出　　处：《海洋学报》2012年第2期143-152,共10页

基　　金：国际海底区域研究开发"十一五"项目(DYXM-115-01-3-3);国家自然科学基金(41076135);国家海洋局第二海洋研究所基本科研业务费专项资助(JG200820)

摘　　要：利用光合色素的生物标志性可以在"纲"水平上表征浮游植物群落结构。依托大洋科学考察第20航次和21航次,通过对西赤道太平洋不同区域5个站位的HPLC藻类色素分析及CHEMTAX程序因子分析,获取了暖池区光合色素及浮游植物群落的垂直分布信息。结果显示在寡营养的暖池区,玉米黄素(Zeaxanthin)及乙二烯叶绿素a(DV Chl a)与叶绿素a浓度呈显著的正相关,浮游植物群落结构以蓝细菌、原绿球藻及定鞭金藻为优势藻纲,按对生物量的贡献率原绿球藻大于蓝细菌大于定鞭金藻的。蓝细菌和原绿球藻分布在真光层不同深度,而在营养盐丰富的次表层优势浮游藻类为定鞭金藻。Photosynthetic pigments are routinely used as biomarkers for various phytoplankton taxa in＂class＂level.Vertical distributions of photosynthetic pigments from 5 stations in the warm pool were studied during China＇s DY20 and DY21 cruises in the western equatorial Pacific.Phytoplankton community structure was discussed using pigment signals and the matrix factorization program CHEMTAX.In the nutrients-depleted warm pool,the concentrations of zeaxanthin（Zea） and divinyl chlorophyll a（DV Chl a） were correlated with chlorophyll a concentration,and phytoplankton community was characterized by high contribution of cyanobacteria,prochlorophytes and haptophytes.Besides,cyanobacteria and prochlorophytes occupied different depths of the euphotic zone,and haptophytes was the dominant algae in nutrient enrichment subsurface water.

关 键 词：西赤道太平洋 暖池区 光合色素 浮游植物群落 CHEMTAX 

分 类 号：P721[天文地球—海洋科学] P735