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首页> 外文期刊>Estuarine Coastal and Shelf Science >Influence of surface salinity gradient on dinoflagellate cyst community structure, abundance and morphology in the Baltic Sea, Kattegat and Skagerrak
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Influence of surface salinity gradient on dinoflagellate cyst community structure, abundance and morphology in the Baltic Sea, Kattegat and Skagerrak

机译：表面盐度梯度对波罗的海，卡特加特海峡和斯卡格拉克邦的鞭毛藻囊结构，丰度和形态的影响

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摘要

Changes in dinoflagellate cyst forming species composition, abundance and morphology along the surface salinity gradient in the Baltic Sea, Kattegat and Skagerrak were investigated and compared with detailed surface salinity data. A strong positive correlation was found between species diversity and surface salinity (R-2 = 0.94; n = 7) in the Baltic Sea-Kattegat-Skagerrak system. The most pronounced decrease in dinoflagellate cyst diversity occurred between Kattegat and the Arkona basin, where the surface salinity also steeply declined. Overall, the total cyst abundance decreased along the salinity gradient. However, in the Gotland and particularly in the Northern Central basin cyst concentrations were elevated compared to the surrounding basins and the cyst community was dominated by heterotrophic cyst-producing dinoflagellate species. Possible factors behind this observation are discussed, with increased nutrient supply as the most likely primary cause. In addition, surface salinity was also confirmed to influence process length development of Operculodinium centrocarpum (R-2 = 0.86; n = 145), which was the most abundant species in this study. (C) 2015 Elsevier Ltd. All rights reserved.
机译：研究了波罗的海，Kattegat和Skagerrak沿表面盐度梯度的鞭毛藻囊形成物种的组成，丰度和形态的变化，并将其与详细的表面盐度数据进行了比较。在波罗的海-格特加特-斯卡格勒克系统中，物种多样性与表面盐度之间存在强烈的正相关关系（R-2 = 0.94； n = 7）。鞭毛藻囊肿多样性的最明显下降发生在卡特加特河和阿科纳盆地之间，那里的表面盐度也急剧下降。总体而言，总囊肿丰度沿盐度梯度下降。但是，在哥得兰岛，特别是北部中部盆地，与周围盆地相比，囊肿浓度升高，且囊肿群落以产生异养囊肿的鞭毛藻种为主。讨论了该观察结果背后的可能因素，其中营养物供应增加是最可能的主要原因。此外，还证实了表面盐度会影响本次研究中最丰富的物种Operculodinium centrocarpum（R-2 = 0.86; n = 145）的生长过程。 （C）2015 Elsevier Ltd.保留所有权利。

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