Answer:
Guppy color patterns would change; guppies would produce fewer but larger offspring; the nitrogen excretion rate would increase and the rate of growth of primary producers such as algae would increase.
Step-by-step explanation:
Guppies color patterns would change and they would produce fewer but larger offspring. Due to the increment, the nitrogen excretion rate would increase and the rate of growth of primary producers such as algae would increase.