有害藻华形成机制理论研究获进展

Harmful algal blooms are an important environmental problem facing aquatic ecosystems, and nutrient levels are considered to be the core factor driving algal blooms. Research in recent years has found that serious algal bloom events may not occur in high-nutrient lakes, indicating that their formation is affected by complex environmental regulation and ecological feedback mechanisms.

Recently, the Northeastern Institute of Geography and Agricultural Ecology of the Chinese Academy of Sciences took Chagan Lake, a typical high-nutrient lake ecosystem, as the research object. It comprehensively used technical means such as metagenomic sequencing, SourceTracker, and interpretable machine learning models to analyze the impact of environmental disturbance and interspecific competition on changes in algal community structure and the formation process of harmful algal blooms.

Studies have found that moderate environmental disturbance can increase the diversity of algal communities and enhance interspecific competition, thereby limiting the ecological niche of dominant algae and inhibiting the formation of harmful algal blooms. The study further revealed the ecological process by which environmental disturbance drives the reorganization of algal communities. With the input of agricultural sources, seasonal changes and the introduction of external algae species, the dominance of cyanobacteria in Chagan Lake has been weakened, low-abundance algae have gradually taken over, and the algal life history strategy has changed from rapid growth to environmental adaptation.

该研究提出了“扰动—竞争—反馈”调控藻华形成的新机制框架，拓展了传统藻华生态理论，为富营养化湖泊精准管控与有害藻华预测预警提供了重要科学支撑。

Relevant research results were published inACSEST&Watersuperior. The research work is supported by the National Natural Science Foundation of China.

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