生物标志物重建全新世以来黄海浮游植物群落结构时空变化  

Biomarker records of temporal and spatial pattern of phytoplankton community structure in the Yellow Sea during the Holocene

作　　者：吴珺洁 袁子能[1] 向荣[2] 张海龙[1] 肖晓彤[1] 赵美训[1] Wu Junjie Yuan Zineng Xiang Rong Zhang Hailong Xiao Xiaotong Zhao Meixun(Ministry of Education~Key Laboratory of Marine Chemistry Theory and Technology , Ocean University of China, Qingdao 266100, China Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China)

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 [2]中国科学院南海海洋研究所边缘海地质重点实验室,广东广州510301

出　　处：《海洋学报》2017年第10期101-110,共10页

基　　金：国家自然科学基金创新研究群体(41521064);国家自然科学基金青年基金(41506214)

摘　　要：现有研究对全新世以来浮游植物群落结构在黄海的时空变化还缺乏深入认识,针对这一问题,本研究分析了C02和N05岩心中的生物标志物,并结合已发表岩心生物标志物数据,重建黄海全新世以来浮游植物群落结构的时空变化。在早全新世,长链烯酮相对比例(A/∑PB)和菜子甾醇相对比例(B/∑PB)低,甲藻甾醇相对比例(D/∑PB)高。较高的陆源有机质指标(TMBR′)值说明黄海浮游植物群落结构主要受陆源营养盐输入控制。在中全新世,A/∑PB升高,B/∑PB和D/∑PB减小,是由于高温高盐的黄海暖流入侵有利于颗石藻生长。在空间分布上,以ZY3、ZY2、ZY1和YE-2 4个站位组成的35.5°N断面区域烯酮相对比例大幅升高,西部站位C02与东部N05烯酮比例小幅上升,这是由于黄海暖流主轴流经35.5°N断面,该区域主要受黄海暖流控制,而其他区域仍受陆源营养盐输入控制。从早全新世到中全新世,B/∑PB(D/∑PB)高值相继出现在N05(C02)和C02(N05)区域,这是由于2个站位的控制因素不同,可能与黄海暖流主轴摆动和陆源物质的搬运有关。在晚全新世,A/∑PB继续升高,B/∑PB和D/∑PB减小。晚全新世东亚冬季季风增强使黄海环流体系加强,黄海暖流对颗石藻的影响进一步扩大。甲藻甾醇与菜子甾醇的相对比例(D/B)升高,可能是由于东亚冬季季风增强,使含有更多氮元素的大气物质沉降到黄海,有利于甲藻对硅藻的竞争。For lack of temporal and spatial pattern of phytoplankton community structure in the Yellow Sea during the Holocene,biomarker records in core C02 and N05 were used to reconstruct the phytoplankton community structures,combined with published biomarker records.In the early Holocene,the relative ratios of alkenones（A/∑PB）and brassicasterol（B/∑PB）were low,while the relative ratio of dinosterol（D/∑PB）was high.High value of TMBR′index indicates that the phytoplankton community structure was controlled by terrestrial nutrients during this period.In the mid Holocene,A/∑PB increased,while B/∑PB and D/∑PB decreased.This is attributed to the Yellow Sea Warm Current intrusion with high temperature and high salinity.A/∑PB increased significantly at core sites ZY3,ZY2,ZY1 and YE-2（35.5°N zone）,while slightly at core sites C02 and N05.The Yellow Sea Warm Current flowed through the 35.5°N zone,controlling the phytoplankton community structure in the zone.However,the phytoplankton community structure in site C02 and N05 was still controlled by terrestrial nutrients.From the early Holocene to the mid Holocene,maximum of B/∑PB（D/∑PB）switched between sites C02 and N05 due to different controlling factors for these two locations,likely related to variations of the Yellow Sea Warm Current axis and the transportation of terrestrial matter.In the late Holocene,A/∑PB continued to increase,while B/∑PB and D/∑PB decreased.This might result from the strengthened circulation system induced by strengthened East Asian Winter Monsoon.Ratio between dinosterol and brassicasterol（D/B）increased in the late Holocene,due to the strengthened East Asian Winter Monsoon,which brought more nitrogen from atmosphere to ocean thus triggering dinoflagellates growth.

关 键 词：生物标志物 群落结构 黄海 全新世 时空格局 

分 类 号：Q948.8[生物学—植物学]