How do excess agricultural run off lead to decreases in in stone fly and dragonfly's?

Excess agricultural runoff often contains fertilizers and pesticides that can contaminate water bodies, leading to nutrient pollution and habitat degradation. This nutrient overload can cause algal blooms, which reduce oxygen levels in the water, making it difficult for stoneflies and dragonflies, both of which require clean, oxygen-rich environments, to survive. Additionally, pesticides can directly harm these aquatic insects, leading to declines in their populations and disrupting the broader ecosystem. Overall, the combination of habitat degradation and toxic exposure significantly impacts their survival rates.