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首页> 外文期刊>Oceanology >Spatial Variability of the Species Composition, Abundance, and Productivity of the Phytoplankton in the White Sea in the Late Summer Period
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Spatial Variability of the Species Composition, Abundance, and Productivity of the Phytoplankton in the White Sea in the Late Summer Period

机译：夏末白海浮游植物的种类组成，丰度和生产力的空间变异性

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摘要

The species composition, cell concentration (N), and biomass (B) of the phytoplankton, as well as the chlorophyll a (Chl a) concentration, primary production (PP), and the concentrations of the dissolved inorganic micronutrients (phosphorus, silica, nitrogen as nitrite), were estimated for Kandalaksha Bay (KB), Dvina Bay (DB), and the basin (Bas) of the White Sea in August of 2004. The micronutrient concentrations were lower compared to the average long-term values for the summer period. The Chl a concentration varies from 0.9 to 2.0 mg/m~3 for most of the studied areas, reaching up to 7.5 mg/m~3 in the Northern Dvina River estuary. The surface water layer of the DB was the most productive area, where the PP reached up to 270—375 mg C/(m~3 day). The phytoplankton biomass varied from 11 to 205 mg C/m~3 with the highest values observed in the Bas and DB. Three groups of stations were defined during the analysis of the phytoplankton's species composition similarity. The dinoflagellates Dinophysis norvegica and Ceratium fusus were particular to the phytoplankton assemblages in the KB; the diatom Ditylum brightwellii was particular to the upper and central parts of the DB. These three phytoplankton species were less abundant in the Bas.
机译：浮游植物的种类组成，细胞浓度（N）和生物量（B），以及叶绿素a（Chl a）的浓度，主要产量（PP）和溶解的无机微量营养素（磷，二氧化硅，估计2004年8月在Kandalaksha湾（KB），Dvina湾（DB）和白海盆地（Bas）进行了估算。微量营养元素的浓度低于长期平均水平夏季。在大多数研究区域中，Chl a浓度在0.9至2.0 mg / m〜3之间变化，在北德维纳河河口达到7.5 mg / m〜3。 DB的地表水层是生产力最高的区域，PP达到270-375 mg C /（m〜3天）。浮游植物的生物量在11至205 mg C / m〜3之间变化，在Bas和DB中观测到最高。在对浮游植物物种组成相似性的分析过程中，定义了三组站。鞭毛恐龙和鞭毛角藜的鞭毛是KB中浮游植物的特有物种。硅藻Ditylum Brightwellii尤其适用于DB的上部和中部。这三个浮游植物种类在巴斯区较少。

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