There are many answer you have to be specific
Answer:
Producer: Deer, Ant's, Carrots, Chickens
Consumer: Dog, Bear,
Decomposer: Mushrooms, Acorns, Flowers, Grass,
Explanation:
The deer population would drastically be reduced with the slower rate of reproduction and predators that would kill more deer than can reproduce. The environment would likely also have a reduced population of predators for deer, since the food source is reduced.
It’s nitrogen! Hope this helps