The distribution of sites in the Upper Mississippi River System (column 1: River Reach name, field station city and state) that were classified into a topological/ecosystem state within years 1993–2019.

Table 2 shows the percentage (%) of sites classified within a reach to compare the distribution of states within each reach. Sites sometimes can exist in more than one node, and therefore the percentage of sites within a state may sum to greater than 100% (i.e., rows sum greater than or equal to 100%).