How was value determined:

1. The range of values for regional wetlands recreation was transferred from three peer-reviewed studies of wetlands recreational values in Louisiana, Canada along Lake Erie, and Saginaw Bay, Michigan (Farber and Costanza 1987; Kreutswizer 1981; Whitehead et al 2006).
2. The data from these studies were combined and adjusted to the West Michigan policy region.

Value estimate limitations:

1. Values represent overall inland wetland recreation activities (e.g.; sport fishing/hunting, wildlife viewing, hiking). We did not include other related recreational activities, such as beach-going, swimming, boating, and camping.
2. We assumed that there was no user fee to access inland wetlands.
3. Some wetlands may represent a high value for wildlife viewing, especially those that provide a unique habitat for local species.