On a warm summer day in August, you decide to go for a walk through a new housing development that was built near your home a few years ago. As you walk by the pond that's in the center of this development, you notice an unpleasant smell. Then, you see that the pond is full of green algae, and there are dead fish floating on the surface. This is a pond that used to be clean and clear, and you used to play in it as a child. What could have most likely caused this change

Respuesta :

The most likely reason for the pond containing full of green algae, and there are dead fish floating on the surface is "lawns are being over fertilized, causing excess fertilizer to wash into the pond, stimulating algae growth".

What is algae?

The term "algae" refers to a class of mainly watery, photosynthetic, and nucleus-bearing organisms that lack the real roots, stems, and leaves of plants as well as their specialized multicellular reproductive structures.

The growth of algae occurs due to -

  • Nitrate pollutants in many water bodies; these nutrients are a major limiting factor for algae development.
  • In these conditions, the nitrogen and phosphorus releases cause an overall rise in algae growth and output.

Role of fertilisers in growth of algae in water bodies-

  • Nitrates can be added additional, unintentionally, by fertilizers that leech into pure water.
  • Algal blooms may result from this rise in algal populations.
  • Aquatic plants die as a result of algal blooms that cut down on light.
  • These decomposed plants and algae serve as food for bacteria, which are multiplying rapidly.

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