Final answer:
Wetland ecosystems in Michigan are the most diverse due to the abundance of plant life that supports a wide variety of animal species.
Step-by-step explanation:
The ecosystem in Michigan with the most diversity is likely the wetland ecosystem. Wetlands are considered the most biologically diverse of all ecosystems. They support a variety of plant life including mangroves, water lilies, cattails, and more. These plants provide habitats for many different amphibians, reptiles, birds, insects, and mammals.