Picoplankton community structure at a coastal front region in the northern part of the South china sea
Picoplankton community structure at a coastal front region in the northern part of the South china sea
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DOI：
10.1093/plankt/fbi117
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发表时间：
2006-03
影响因子：
2.1
通讯作者：
L. Pan;Jing Zhang;Q. Chen;B. Deng
中科院分区：
文献类型：
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作者：
L. Pan;Jing Zhang;Q. Chen;B. Deng
利用流式细胞仪对2004年冬季南海北部中国海区超微浮游植物群落的数量进行了测定，以研究沿海前缘海域超微浮游植物的动态变化。原氯球菌在温度和盐度相对较高的水域比近岸水域更丰富。异养菌在微浮游总生物量中占主导地位，但在生物量和表层/底层生物量比方面在锋面两侧保持较稳定。浮游微藻生物量及其表层/底层生物量比的显著增加主要是由于聚球藻对近岸开放南海水域的贡献。温度对聚球藻和原氯球菌的生长有限制作用。微真核生物和异养细菌对锋面上水文条件的变化不那么敏感。近岸富营养化近岸海域微浮游动物的自养/异养生物量比近岸和少营养开放南海低。
Abundances of picoplankton groups were determined by flow cytometry in the Northern South China Sea (SCS) in winter 2004 to study the dynamics of picoplankton at a coastal front region. Prochlorococcus is more abundant in relatively high temperature and salinity waters than in nearshore area. Heterotrophic bacteria dominate in total picoplanktonic biomass but keep rather stable in biomass and surface/bottom biomass ratio on both sides of the front. Increases of picophytoplanktonic biomass and their surface/bottom biomass ratio are remarkable mainly owing to the contribution of Synechococcus on the offshore open SCS waters. Temperature is found to limit the growth of Synechococcus and Prochlorococcus. Picoeukaryotes and heterotrophic bacteria are less sensitive to the change in hydrographic conditions across the front. The autotrophic/heterotrophic biomass ratio of picoplankton is lower in eutrophic coastal waters on the nearshore side relative to the offshore and oligotrophic open SCS.