Indicators of the Statuses of Amphibian Populations and Their Potential for Exposure to Atrazine in Four Midwestern U.S. Conservation Areas
Figure 5
Triazine concentrations measured in water samples from amphibian breeding sites across study areas via an enzyme-linked immunosorbent assay.
NS = the Neal Smith National Wildlife Refuge; UMR = the Upper Mississippi River National Wildlife and Fish Refuge; SCNSR = the St. Croix National Scenic Riverway; VNP = Voyageurs National Park. Values do not include samples from the main channel of the Mississippi River in the UMR. Horizontal lines within boxes indicate median values. The middle 50% of the data are contained within each box. Vertical lines attached to tops and bottoms of boxes extend to the highest and lowest values. Reference line at 0.05 ppb = the detection limit of the assay.