Describe the process of Eutrophication?

Eutrophication occurs when heavy rains cause fertalizers from farmland to flow into rivers or lakes. These fertalizers lead to a reduction to the limiting factors of algal growth by providing phosphate and nitrate to the water. Due to this, the algae blooms and overpopulates the water body, leading to algal death. This algal death attracts decomposing bacteria which absorbs oxygen from the water during respiration, lowing the concentration of oxygen in the water body. This causes many organisms in the water to die, and leads to unhabitable water bodies.