What are the effects of fertilizer input into lakes? select all that apply. select all that apply. fertilizers discolor lake water, preventing algal photosynthesis. fertilizers are toxic to freshwater algae. fertilizers lead to algal blooms that eventually deplete lake oxygen?

The correct answer is: ' fertilizers lead to algal blooms that eventually deplete lake oxygen ''. Fertilizers contain nutrients for plant growth, typically nitrogen and phosphorus. Much of the fertilizer applied to farmlands washes off into rivers during rainfall. Water in rivers and lakes can then become rich in nutrients, which is called eutrophication. Algal growth in lakes is typically limited by nutrients, usually phosphorus. This means, any additional input of nutrients into a lake will cause exponential algal growth. An algal bloom will occur with the input of nutrients. This effectively changes the trophic state of the lake. The algal bloom will eventually deplete the nutrients, and the population of algae will experience a mass die-off. Rotting algae will result in anoxic conditions, as decomposition uses up oxygen. This can lead to the death of other aquatic organisms.