Picoplankton community structure along the northern Iberian continental margin in late winter-early spring
Picoplankton community structure along the northern Iberian continental margin in late winter-early spring
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DOI：
10.1093/plankt/fbh098
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发表时间：
2004-09-01
影响因子：
2.1
通讯作者：
Varela, M
中科院分区：
文献类型：
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作者：
Calvo-Díaz, A;Morán, XAG;Varela, M
2002年冬末和早春，对伊比利亚半岛陆架北部和西北部垂直于海岸的24条横断面的自养和异养超微型浮游生物的表面分布进行了评估。通过流式细胞术（FC）分析了群落结构，发现群落结构受水文学的强烈影响。调查期间发现了典型的晚冬条件，其特点是西部存在极地葡萄牙沿海逆流（PCCC），而东部分层不断增加。蓝藻（主要是聚球藻）在低叶绿素 a (Chl a) 浓度下占主导地位，而超微核生物的总丰度和相对丰度通常随着浮游植物总生物量的增加而增加。大多数 FC 定义的超微型浮游生物群的细胞大小差异也沿纵向和沿海-近海梯度观察到。原绿球藻的存在（
The surface distribution of autotrophic and heterotrophic picoplankton was assessed in 24 transects perpendicular to the coast along the N and NW Iberian peninsula shelf in late winter and early spring 2002. Community structure was analyzed by flow cytometry (FC) and found to be strongly influenced by hydrography. Typical late winter conditions were found during the survey, characterized by the presence of the poleward Portugal coastal counter current (PCCC) in the west and an increasing stratification eastwards. Cyanobacteria (mostly Synechococcus) dominated at low chlorophyll a (Chl a) concentration whereas both the total and relative abundance of picoeukaryotes generally increased with total phytoplankton biomass. Differences in the cell size of most FC-defined picoplanktonic groups were also observed along the longitudinal and coastal-offshore gradients. The presence of Prochlorococcus (