A 4-year (2015–2018) weekly to bi-weekly time series of phytoplankton biomass and composition derived from high-performance liquid chromatography (HPLC) phytoplankton pigments and Chemtax analysis is presented and used to investigate phytoplankton community dynamics at a station in the northern Strait of Georgia (NSoG). Through the time series, blooms were largely dominated by diatoms, which formed the bulk of annual biomass. Spring diatom bloom timing and magnitude varied widely and appears to have been driven by complex interactions of solar radiation, wind, stratification, and grazing. In turn, post-spring diatom blooms were mostly associated with nutrient renewal to the surface layer as suggested by redundancy analysis (RDA), which showed inverse relationships between diatoms and temperature and stratification. A single non-diatom bloom in July 2016, dominated by the silicoflagellate, Dictyocha sp., was the time series maximum biomass and occurred under warm, stratified conditions and a freshening of the surface layer: The Chemtax dictyochophyte group was positively linked to temperature and stratification through RDA. Outside of bloom conditions, diverse communities emerged with prasinophytes and cryptophytes showing persistent contributions and their highest biomass during summer. Uniquely, these groups often persisted through nutrient renewal and drawdown events typically associated with diatom blooms and suggestive of high grazing pressure and nutrient regeneration. The prevalence of these groups through diverse conditions likely precluded statistical links with environmental drivers. This time series is the first of its kind for the NSoG, creates a baseline for future analyses, and highlights the contributions by small species, particularly prasinophytes, to regional phytoplankton communities.

介绍了一个从高效液相色谱（HPLC）浮游植物色素和Chemtax分析得出的浮游生物生物量和组成的4年（2015-2018）每周至每两周的时间序列，并用于调查该站某处的浮游植物群落动态。佐治亚州北部海峡（NSoG）。在整个时间序列中，水华在很大程度上由硅藻主导，这构成了年度生物量的大部分。春季硅藻绽放的时机和幅度变化很大，并且似乎受太阳辐射，风，分层和掠食的复杂相互作用的驱动。反过来，正如冗余分析（RDA）所建议的那样，春季后的硅藻绽放主要与表层养分的更新有关，这表明硅藻与温度和分层之间存在反比关系。Dictyochasp。，是时间序列上最大的生物量，发生在温暖，分层的条件下以及表面层的新鲜度：Chemtax dictyochophyte组通过RDA与温度和分层呈正相关。在开花条件之外，出现了多种多样的群落，其中有藻类植物和隐生植物，在夏季表现出持续的贡献和最高的生物量。独特地，这些群体通常通过与硅藻绽放相关的养分更新和下降事件而持续存在，并暗示着高放牧压力和养分再生。这些人群由于情况不同而普遍存在，可能排除了与环境驱动因素之间的统计联系。该时间序列是NSoG的同类产品中的第一个，为将来的分析奠定了基础，并突出了小物种的贡献，