微囊藻聚集与迁移机制的研究进展
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摘要
微囊藻为蓝藻水华最常见的优势种群,其暴发频度和生物量占比最大。微囊藻的聚集有助于其垂直迁移上升至水面,在湖流的辐合或辐散作用下,其团聚体因迁移碰撞还将二次聚集,继而暴发蓝藻水华。研究表明微囊藻的聚集机制与胞外酶活性、产碱性磷酸酶附生菌、细胞表面粘附和凝集素交联细胞等有关,尤其是与胞外聚合物密切相关。而它的迁移机制与细胞镇重物糖类的合成和消耗、水体湍流度,特别是与气囊的合成和破裂紧密相关。文章综述了近年来微囊藻聚集与迁移机制,讨论了微囊藻聚集和迁移的影响因素及危害,展望了微囊藻聚集与迁移研究的未来方向,以期为科学地管理和控制蓝藻水华暴发提供理论依据。
Microcystis spp.is the predominant species commonly seen in the case of cyanobacterial bloom outbreak,with high biomass percentage.It has been found that aggregation of Microcystis enhances the vertical migration up to the water surface,and the lake current action of convergence and/or divergence could promote the secondary aggregation of Microcystis due to the migration and collision,which boosts the cyanobacterial blooms;and the aggregation mechanism of Microcystis is closely related to the activity of extracellular enzyme,the action of alkaline phosphatase-producing bacterium,cell surface adhesion and cross-linked cells by Lectin,and especially the extracellular polymeric substances(EPS).And its migration mechanism is connected with the synthesis and consumption of carbohydrates,water turbulence,and the variation of gas vesicle.This paper reviewed the aggregation and migration mechanisms of Microcystis,briefly discussing the relevant influential factors and the ensuing ecological disaster,and finally,projecting the future research orientation of aggregation and migration of Microcystis.
Microcystis spp.is the predominant species commonly seen in the case of cyanobacterial bloom outbreak,with high biomass percentage.It has been found that aggregation of Microcystis enhances the vertical migration up to the water surface,and the lake current action of convergence and/or divergence could promote the secondary aggregation of Microcystis due to the migration and collision,which boosts the cyanobacterial blooms;and the aggregation mechanism of Microcystis is closely related to the activity of extracellular enzyme,the action of alkaline phosphatase-producing bacterium,cell surface adhesion and cross-linked cells by Lectin,and especially the extracellular polymeric substances(EPS).And its migration mechanism is connected with the synthesis and consumption of carbohydrates,water turbulence,and the variation of gas vesicle.This paper reviewed the aggregation and migration mechanisms of Microcystis,briefly discussing the relevant influential factors and the ensuing ecological disaster,and finally,projecting the future research orientation of aggregation and migration of Microcystis.
引文
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