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Dynamics of phytoplankton diversity structure and primary productivity in the English Channel

机译：英吉利海峡浮游植物多样性结构和初级生产力的动态

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摘要

The dynamics of the phytoplankton assemblage, the physical, chemical and biological parameters, and primary productivity and production were monitored in the central English Channel along a transect between Ouistreham and Portsmouth from January to December 2010. The spatial patterns of the phytoplankton assemblage were controlled by the hydrological characteristics of the water masses, and the annual structure of the phytoplankton assemblage was characteristic of the central English Channel and was controlled by seasonality. The spring bloom was dominated by a single species, Chaetoceros socialis, and associated with low microphytoplankton evenness and Shannon-Wiener indices, whereas the evenness index was high from late spring to winter and associated with the proliferation of pico- and nanophytoplankton cells. We identified 2 species responsible for harmful algal blooms, Phaeocystis globosa, which dominated the community in the northern part of the Seine Bay in May, and Lepidodinium chlorophorum, which dominated the community near the French coast in September. We examined the relationship between microphytoplankton diversity and maximum primary production and productivity. We found a negative parabolic relationship between the diversity indices (evenness and Shannon-Wiener) and maximum primary production, and a positive parabolic relationship between the number of taxa (richness) and maximum primary production. However, we found no relationship between maximum productivity and the evenness or richness indices. High levels of productivity were measured during the increasing abundance of pico and nanophytoplankton cells, highlighting the importance of taking the dominant functional group into account, rather than the degree of diversity, when explaining the level of productivity.
机译：在2010年1月至12月间，沿着Ouistreham和Portsmouth之间的样带，在英吉利海峡中部监测了浮游植物组合的动力学，物理，化学和生物学参数以及初级生产力和生产。通过控制浮游植物组合的空间格局水团的水文特征和浮游植物组合的年结构是英吉利海峡中央的特征，并受季节控制。春季开花主要由单一物种Chaetoceros socialis主导，并且与微浮游植物的均匀度和Shannon-Wiener指数相关，而从春末到冬季，均匀度指数较高，并且与皮下和浮游植物的增殖有关。我们确定了2种造成有害藻类繁殖的物种，Phaeocystis globosa于5月在塞纳河湾北部占主导地位，而Lepidodinium chlorophorum于9月在法国海岸附近占主导地位。我们研究了微浮游植物多样性与最大初级生产和生产力之间的关系。我们发现多样性指数（均匀度和Shannon-Wiener）与最大初级产量之间呈负抛物线关系，而分类单元数量（丰富度）与最大初级产量之间呈正抛物线关系。但是，我们发现最大生产率与均匀度或丰富度指数之间没有关系。在微微和浮游植物细胞不断增加的过程中，高水平的生产力得到了衡量，这突出了在解释生产力水平时，考虑到主导功能基团而不是多样性的重要性。

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  • 来源
    《Marine ecology progress series》 |2014年第28期|49-64|共16页
  • 作者

    Camille Napoleon; Liliane Fiant; Virginie Raimbault; Philippe Riou; Pascal Claquin;

  • 作者单位

    Universite de Caen Basse-Normandie, UMR BOREA, 14032 Caen, France,UMR BOREA, CNRS-7208, IRD-207, MNHN, UPMC, UCBN, 14032 Caen, France,IFREMER, Laboratoire Environnement Ressources de Normandie, Avenue du General de Gaulle, 14520 Port-en-Bessin, France;

    IFREMER, Laboratoire Environnement Ressources de Normandie, Avenue du General de Gaulle, 14520 Port-en-Bessin, France;

    Universite de Caen Basse-Normandie, UMR BOREA, 14032 Caen, France,UMR BOREA, CNRS-7208, IRD-207, MNHN, UPMC, UCBN, 14032 Caen, France;

    IFREMER, Laboratoire Environnement Ressources de Normandie, Avenue du General de Gaulle, 14520 Port-en-Bessin, France;

    Universite de Caen Basse-Normandie, UMR BOREA, 14032 Caen, France,UMR BOREA, CNRS-7208, IRD-207, MNHN, UPMC, UCBN, 14032 Caen, France;

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  • 正文语种 eng
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  • 关键词

    Phytoplankton diversity; Primary production; Productivity; English Channel;

    机译：浮游植物多样性;初级生产;生产率;英文频道;

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