Fig. 1

Map of study site, including collection locations for dock samples (site A), adjacent shoreline samples (site B), and photosynthetically active radiation (PAR) measurements near the Ash River Boat Docks on Kabetogama Lake, MN (USA) on Sept. 9–10, 2021. The two sites are less than 30 m apart. Figure was produced in ArcGIS Pro (v. 3.3.1) using satellite imagery from https://naip-usdaonline.hub.arcgis.com/39.