The life cycle of cyanobacteria Dolichospermum flos-aquae causing the blooming of waters of the boreal zone is studied. The mass propagation of the D. flos-aquae in the plankton stage occurs due to their ability to realize high biotic potential, defined by the combination of features developed during evolution, which the other partners of the plankton community lack. These include: adaptation to a certain growth temperature; low demand for nutrients; nitrogen fixation and intracellular accumulation of phosphates; and the ability of trichomes to migrate, allowing them to occupy the optimal parts of the euphotic zone for photosynthesis. It is established that the trichomes of D. flos-aquae consist of heterocysts and vegetative cells of different maturity, generosity, and activity during the planktonic stage, and their ratio changes throughout the life cycle of microorganisms. It is believed that the primary and secondary metabolites released by D. flos-aquae into the medium take part in the regulation of their own population growth, including cell destruction at the final stage of blooming, akinetes formation, and the simultaneous suppression in propagation of community partners. With the dominance of one species, the released toxic metabolites increase in years with an anticyclone type of weather, resulting in the reduction of species diversity and the simplification of the biotic community structure.

中文翻译：

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北方地区水域中有毒蓝藻水藻（Anabaena flos-aquae）的生长

研究了导致北方水域水华的蓝藻浮萍的生命周期。浮游藻在浮游生物阶段的大量繁殖是由于它们具有实现高生物潜能的能力，这种能力是由进化过程中形成的特征的组合所定义的，而浮游生物的其他伙伴却缺乏这种能力。这些包括：适应一定的生长温度；营养需求低；固氮和磷酸盐在细胞内的积累；和毛状体迁移的能力，使它们能够占据光合作用区的最佳部分以进行光合作用。建立了D. flos-aquae的毛状体由浮游生物阶段中不同成熟度，慷慨性和活动性的异性囊肿和营养细胞组成，它们的比例在微生物的整个生命周期中都在变化。据信，由水藻（D. flos-aquae）释放到培养基中的初级和次级代谢产物参与了其自身种群生长的调节，包括在开花的最后阶段破坏细胞，形成突以及同时抑制藻类的繁殖。社区伙伴。在一个物种的主导下，随着反气旋类型的天气，释放的有毒代谢产物会在数年内增加，从而导致物种多样性的降低和生物群落结构的简化。