Figure 3 : Temporal distribution of metabolism estimates at each site.

From: The metabolic regimes of 356 rivers in the United States

Figure 3

Each site forms a row, and horizontal line segments represent periods of continuous daily metabolism estimates. Colors give density of estimates, ranging from 17 to 365 daily estimates per year. For the purpose of this figure, sites were considered “seasonal” if the number of metabolism estimates in January was fewer than 1/24 the total number of estimates at a site (112 of 356 sites meet this criterion).