What is one of the primary concerns when allowing livestock near a pond?

The primary concern of allowing livestock near a pond is the potential for nutrient runoff. Livestock can contribute to nutrient pollution as their waste contains high levels of nitrogen and phosphorus. When it rains, this runoff can wash these nutrients into the pond, leading to an excess of nutrients in the water. This excess can trigger various ecological issues, including eutrophication. Eutrophication can result in algal blooms, which threaten aquatic life by depleting oxygen levels and blocking sunlight needed for submerged plants. Therefore, managing livestock access is crucial to protect water quality and overall pond health.