Question

1. excess nutrients from fertilizers or sewage can enter a pond and result in an increase in the population of algae.

when the algae die, bacteria use oxygen to break down the algae. this can cause the dissolved oxygen concentration in the pond to decrease.
what might happen as a result of low dissolved oxygen concentrations in a pond?
the pond will have an overabundance of fish.
fish and other organisms could die.
the pond will become crystal clear.
sediment will clog up the pond.
clear all

Explanation:

Fish and most aquatic organisms rely on dissolved oxygen in water to respire. Low dissolved oxygen levels mean there is not enough oxygen to support these organisms, leading to their death. The other options are incorrect: low oxygen would not cause more fish, clear water, or sediment clogging directly from this process.

Answer:

Fish and other organisms could die.