Aquatic Ecosystems and Phytoplankton Dynamics

When excess nutrients—primarily phosphorus from agricultural runoff, wastewater, and urban drainage—enter lakes, reservoirs, and coastal waters, they trigger eutrophication: a process that fuels explosive growth of cyanobacteria and other algae at the expense of broader aquatic life. These harmful algal blooms can release potent toxins that threaten drinking water supplies, kill fish, and pose serious risks to human and animal health, making their prediction and management a pressing environmental and public health concern. Researchers are working to understand how rising temperatures and altered precipitation patterns under climate change interact with nutrient loading to intensify bloom frequency and duration, and whether reducing phosphorus inputs alone is sufficient to reverse eutrophication in already-degraded systems. Central open questions include how cyanobacterial communities shift in response to combined climatic and chemical stressors, and how to design nutrient control strategies that remain effective as environmental baselines continue to change.

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Keywords

EutrophicationHarmful Algal BloomsCyanobacteriaNutrient ControlClimate ChangeFreshwater Ecosystems