In situ evaluation of the initiation of the North Atlantic phytoplankton bloom
In situ evaluation of the initiation of the North Atlantic phytoplankton bloom
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DOI：
10.1029/2010gl044174
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发表时间：
2010-09-21
影响因子：
5.2
通讯作者：
Behrenfeld, M.
中科院分区：
文献类型：
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作者：
Boss, E.;Behrenfeld, M.
两年的连续物理和光学测量，从剖析浮子在西亚北极北大西洋被用来分析季节性浮游植物动态。观察到的年周期挑战传统的观点，即春季浮游植物在上层水柱中的积累需要一个临界分层阈值（称为“格兰效应”或“斯维尔德鲁普假说”）。相反，我们发现，生物量的积累开始在仲冬时，光照水平最低，近地表混合最深。这些意见是一致的，最近提出的稀释再耦合假说，该假说指出，在北大西洋的深冬混合是必不可少的水华形成，因为它使浮游植物的生长放牧损失，从而使净生物量的积累，尽管低光条件。引用：Boss，E.，和M. Behrenfeld（2010年），《北大西洋浮游植物水华开始的原位评估》，地球物理学。保留信函：37，L18603，doi：10.1029/2010GL044174。
Two years of continuous physical and optical measurements from a profiling float in the western subarctic North Atlantic are used to analyze seasonal phytoplankton dynamics. The observed annual cycle challenges the traditional view that initiation of spring accumulations of phytoplankton in the upper water column requires a critical stratification threshold (known as the 'Gran effect' or the 'Sverdrup Hypothesis'). Instead, we find that biomass accumulation begins in mid-winter when light levels are minimal and near-surface mixing is deepest. These observations are consistent with the recently proposed dilution-recoupling hypothesis which states that deep winter mixing in the North Atlantic is essential for bloom formation as it decouples phytoplankton growth from grazing losses, thereby allowing net biomass accumulation despite low-light conditions. Citation: Boss, E., and M. Behrenfeld (2010), In situ evaluation of the initiation of the North Atlantic phytoplankton bloom, Geophys. Res. Lett., 37, L18603, doi:10.1029/2010GL044174.