How does a high nutrient load affect aquatic pest proliferation?

A high nutrient load in aquatic environments typically leads to an increase in the proliferation of aquatic pests, particularly through mechanisms such as the formation of harmful algal blooms. When nutrient levels, especially nitrogen and phosphorus, are elevated, they often stimulate the rapid growth of algae and aquatic plants.

This excessive growth can create unfavorable conditions for other aquatic life and disrupt the natural balance of the ecosystem. Algal blooms can deplete oxygen in the water as they die off and decay, leading to hypoxic conditions that are harmful or lethal to fish and other aquatic organisms. Additionally, some algal blooms produce toxins that can affect wildlife, humans, and pets, further exemplifying the negative impact of high nutrient loads on aquatic environments.

In contrast, the other options do not accurately reflect the consequences of high nutrient loads, as they suggest either neutral effects or beneficial outcomes, which do not align with the established understanding of aquatic ecology. High nutrient levels generally lead to greater problems in water bodies, emphasizing the significance of managing nutrient inputs to control pest populations effectively.