Kan et al. Suppl. Fig. S1 A B Yellowstone Lake Inflated Plain Otter Vent Southeast Arm West Thumb Deep Vent 5 km Yellowstone Lake Supplementary Figure S1. Maps illustrating the relative locations of the research and sampling sites described in this study. (A) Yellowstone National Park (downloaded from http://www.nps.gov/archive/yell/interactivemap/index.htm) and (B) Yellowstone Lake. Large red dots provide approximate lake locations for the four sampling sites: West Thumb Deep Vent; Otter Vent; Inflated Plain Photic zone; Southeast Arm Photic zone. Dashed line represents the approximate boundary of the Yellowstone caldera.