Question

In aquatic ecosystems with high concentrations of dissolved nutrients, increases in the decomposer population ultimately decrease the amount of dissolved oxygen in the water. This change most likely results in

A. increases in photosynthetic bacteria in aquatic ecosystems.
B. increases in the biodiversity of aquatic ecosystems.
C. decreases in the carrying capacity for primary consumers in aquatic ecosystems.
D. decreases in competition between organisms in aquatic ecosystems.

Answer 1

In aquatic ecosystems with high concentrations of dissolved nutrients, an increase in the decomposer population leads to a decrease in dissolved oxygen levels, resulting in the death of many ecosystem fauna.

Step-by-step explanation:

The increase in the decomposer population in aquatic ecosystems with high concentrations of dissolved nutrients ultimately decreases the amount of dissolved oxygen in the water. This is because decomposers break down dead organic matter, which leads to the release of nutrients. As a result, excessive growth of microorganisms occurs, depleting the dissolved oxygen and ultimately causing the death of many ecosystem fauna.