McGillicuddy D J, Townsend D W, Keafer B A, Thomas M A, Anderson D M
Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
School of Marine Sciences, University of Maine, Orono, ME 04469, USA.
Deep Sea Res 2 Top Stud Oceanogr. 2014 May 1;103:163-173. doi: 10.1016/j.dsr2.2012.11.002.
A series of oceanographic surveys on Georges Bank document variability of populations of the toxic dinoflagellate on time scales ranging from synoptic to seasonal to interannual. Blooms of on Georges Bank can reach concentrations on the order of 10 cells l, and are generally bank-wide in extent. Georges Bank populations of appear to be quasi-independent of those in the adjacent coastal Gulf of Maine, insofar as they occupy a hydrographic niche that is colder and saltier than their coastal counterparts. In contrast to coastal populations that rely on abundant resting cysts for bloom initiation, very few cysts are present in the sediments on Georges Bank. Bloom dynamics must therefore be largely controlled by the balance between growth and mortality processes, which are at present largely unknown for this population. Based on correlations between cell abundance and nutrient distributions, ammonium appears to be an important source of nitrogen for blooms on Georges Bank.
对乔治浅滩进行的一系列海洋学调查记录了有毒甲藻种群在从天气尺度到季节尺度再到年际尺度上的变化。乔治浅滩上的甲藻水华浓度可达每升10个细胞左右，且范围通常覆盖整个浅滩。乔治浅滩的甲藻种群似乎与缅因湾相邻沿海地区的种群基本独立，因为它们所处的水文生态位比沿海地区的更冷、盐度更高。与依靠大量休眠孢囊引发水华的沿海种群不同，乔治浅滩的沉积物中很少有孢囊。因此，水华动态必须在很大程度上受生长和死亡过程之间平衡的控制，而目前对于这个种群来说，这些过程在很大程度上是未知的。基于细胞丰度与营养物分布之间的相关性，铵似乎是乔治浅滩甲藻水华的重要氮源。
