Abstract Using the field data collected in the Black Sea in September 2005–May 2013, the authors studied the spatial variability of the ratio of organic carbon to chlorophyll a (C:Chl a) in the sea surface layer (0–1 m). The C:Chl a ratio is an important parameter that reflects the phytoplankton adaptation to abiotic factors. Its maximum variations occurred in September–October 2005 and October 2010 when the highest spatial variability of average light intensity and nitrogen concentration was observed in the upper mixed layer. As a result, the maps of phytoplankton biomass differed from chlorophyll maps. In August 2011, no effect of light or nitrogen on the spatial variability of the C:Chl a ratio was found. Changes in the contribution of dinoflagellates to the total phytoplankton biomass affected the C:Chl a ratio variability, which was two times lower compared to September–October 2005 and October 2010. Also, the spatial distribution of phytoplankton biomass differed from the distribution of chlorophyll a concentration only in some areas of the sea. In May 2013, environmental factors slightly varied across the study area and the spatial variability of the C:Chl a ratio was insignificant. Therefore, the map of phytoplankton biomass indicated similarities with the chlorophyll map.

中文翻译：

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浮游植物适应对其生物量和黑海表层叶绿素a浓度分布的影响

摘要 利用 2005 年 9 月至 2013 年 5 月在黑海收集的现场数据，作者研究了海表层 (0-1 m) 有机碳与叶绿素 a (C:Chl a) 比率的空间变异性。C:Chl a 比率是反映浮游植物对非生物因素适应性的重要参数。其最大变化发生在 2005 年 9 月至 10 月和 2010 年 10 月，当时在上混合层中观察到平均光强度和氮浓度的最高空间变异性。因此，浮游植物生物量图与叶绿素图不同。2011 年 8 月，未发现光或氮对 C:Chl a 比率的空间变异性的影响。甲藻对总浮游植物生物量贡献的变化影响了 C:Chl a 比率的变异性，与 2005 年 9 月至 10 月和 2010 年 10 月相比，低两倍。此外，浮游植物生物量的空间分布与叶绿素 a 浓度分布仅在某些海域不同。2013 年 5 月，整个研究区域的环境因素略有不同，C:Chl a 比率的空间变异性不显着。因此，浮游植物生物量图表明与叶绿素图有相似之处。