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首页> 外文期刊>Marine ecology progress series >Tropical phytoplankton community development in mesocosms inoculated with different life stages
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Tropical phytoplankton community development in mesocosms inoculated with different life stages

机译：不同生命阶段接种的中生代热带浮游植物群落发育

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Many diatom species have the ability to form benthic resting stages, but the importance of these stages as a supply for planktonic blooms is uncertain. A mesocosm study was carried out in December 2005 to January 2006 in Mangalore, India. Mesocosms were inoculated with various combinations of benthic and/or planktonic cells, sampled from the coastal SE Arabian Sea, and the development of the planktonic community was followed. Diatoms dominated the phytoplankton community in all mesocosms, irrespective of inoculum. The most significant differences among inoculum types were altered species composition, and the timings of the maximum cell abundances, which lagged behind in the sediment mesocosms. Populations of Thalassiosira were initiated by both plankton and benthic propagules. Taxa known from temperate coastal areas to seed bloom by benthic propagules, such as Chaetoceros and Skeletonema, were predominantly seeded by planktonic cells in this experiment; this implies differential seeding strategy within the same species at different latitudes. The species assemblage encountered in the plankton and sediment was similar, which indicates that the benthic resting stages seed an autochthonous phytoplankton flora in the area. High species diversity in all inoculated mesocosms was maintained throughout the experimental period, although the actual number of species was fewer at the end. The hydrographic conditions and timing of formation, survival, and germination of diatom resting stages in SE Arabian Sea are discussed.
机译：许多硅藻物种具有形成底栖休止期的能力，但是这些阶段作为浮游水华供应的重要性尚不确定。 2005年12月至2006年1月在印度芒格洛进行了中观研究。从沿海东南阿拉伯海采样的底栖细胞和/或浮游生物的各种组合接种了中膜，并跟踪了浮游生物的发展。硅藻在所有介观的浮游植物群落中占主导地位，而与接种物无关。接种物类型之间最显着的差异是物种组成的改变以及最大细胞丰度的发生时间，后者在沉积物中型体中滞后。 Thalassiosira的种群是由浮游生物和底栖繁殖体引发的。在这个实验中，从温带沿海地区已知的底栖动物到底栖繁殖体（如Chaetoceros和Skeletonema）的种子繁殖中，主要是通过浮游细胞播种的。这意味着不同纬度的同一物种内的差异播种策略。在浮游生物和沉积物中遇到的物种组合是相似的，这表明底栖静止阶段在该地区播种了一种本地浮游植物。在整个实验过程中，所有接种过的中膜物种都保持了较高的物种多样性，尽管最终实际物种数量较少。讨论了阿拉伯阿拉伯海域硅藻静止阶段的水文条件，形成，生存和萌发的时间。

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