State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Laboratory of aquatic ecological conservation and restoration, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Laboratory of aquatic ecological conservation and restoration, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Environ Pollut. 2019 Nov;254(Pt B):113056. doi: 10.1016/j.envpol.2019.113056. Epub 2019 Aug 16.
River algal blooms have become a newly emerging global environmental issue in recent decades. Compared with water eutrophication in lakes and reservoirs, algal blooms in large river systems can cause more severe consequences to watershed ecosystems at the watershed scale. However, reveal the causes of river algal blooms remains challenging in the interdisciplinary of hydrological-ecological-environmental research, due to its complex interaction mechanisms impacted by multiple factors. In addition, there were still considerable uncertainties on the characteristics, impacts, driving factors, as well as the applicable water system models for river algal blooms. In this paper, we reviewed existing literature to elaborate the definition and negative effects of river algal blooms. We analyzed sensitive factors including nutrient, hydrological and climatic elements. We also discussed the application of ecohydrological models under complicated hydrological conditions. Finally, we explored the essence of the river algal bloom by the interaction effects of physical and biogeochemical process impacted by of climate change and human activities. The model-data integration accounting for multi-factor effects was expected to provide scientific guidance for the prevent and control of algal blooms in large river systems.
近几十年来，河流藻类水华已成为一个新出现的全球性环境问题。与湖泊和水库的水体富营养化相比，大型河流水体中的藻类水华可能会在流域尺度上对流域生态系统造成更严重的后果。然而，由于受多种因素影响的复杂相互作用机制，在水文学-生态学-环境研究的交叉学科中，揭示河流藻类水华的成因仍然具有挑战性。此外，对于河流藻类水华的特征、影响、驱动因素以及适用的水系模型仍然存在相当大的不确定性。本文通过综述现有的文献，阐述了河流藻类水华的定义和负面影响。分析了包括营养物、水文和气候要素在内的敏感因素。还讨论了在复杂水文条件下生态水文学模型的应用。最后，我们通过气候变化和人类活动影响的物理和生物地球化学过程的相互作用效应来探讨河流藻类水华的本质。考虑多因素影响的模型-数据综合预计将为大型河流水体藻类水华的防治提供科学指导。
