Final answer:
Algae blooms can occur in spring and summer due to warm temperatures, increased sunlight, and nutrient-rich waters. Springtime blooms are often caused by runoff from melting snow, while summer blooms can be caused by high temperatures and excessive nutrient levels.
Step-by-step explanation:
Algae blooms can occur in two primary seasons: spring and summer. During these seasons, the combination of warm temperatures, increased sunlight, and nutrient-rich waters can lead to the rapid growth and proliferation of algae. Springtime blooms often occur as a result of increased runoff from melting snow, which carries nutrients into bodies of water. Summer blooms can be caused by factors such as high temperatures, calm weather conditions, and excessive nutrient levels.