Table 1.

Overview of caves in Great Basin National Park (GRBA) sampled for this study. Biofilm samples in GRBA were collected from naturally lit marble, limestone, and dolomite surfaces within (near the entrances) eight “wild” caves—caves with infrequent human visitation and without artificial lighting—distributed across three drainages, in addition to artificially lit lampenflora communities in Lehman Caves (show cave).

Cave Name/Sample Date	Watershed	Length	Depth	Elevation (Meters above Sea Level)	Water Near Sampling Sites	Notes
Catamount (“CATA”)—wild (Pole Canyon Limestone)/15 November 2019	Baker	~10 m.	~9 m.	~2179 m.a.s.l.	no	Short, enlarged fracture cave
Ice (“ICE”)—wild (Pole Canyon Limestone)/31 May 2019	Baker	206 m.	12 m.	2159 m.a.s.l.	yes	Occasionally has ice near entrance (temperatures about 10 °F lower than other caves)
Upper Pictograph (“UPPICT”)—wild (Pole Canyon Limestone)/15 November 2019	Baker	56 m.	6 m.	2179 m.a.s.l.	no	Pictographs and bats (five species); dust from adjacent gravel road
Lower Pictograph (“LOPICT”)—wild (Pole Canyon Limestone)/15 November 2019	Baker	49 m.	5 m.	2163 m.a.s.l.	no	Pictographs; dust from adjacent gravel road
Lehman (“LEHM”)—show (Pole Canyon Limestone)/31 May & 15 November 2019	Lehman	~3353 m.	~30 m.	2109 m.a.s.l.	yes	Longest cave in Nevada
Root (“ROOT”)—wild (Pole Canyon Limestone)/15 November 2019	Lehman	56 m.	9 m.	2105 m.a.s.l.	no	Steep, narrow entrance
Fox Skull (“FOX”)—wild (Notch Peak Limestone)/15 November 2019	Snake	31 m.	3 m.	1998 m.a.s.l.	no	Attracts a lot of wildlife
Snake Creek (“SNAKE”)—wild (Notch Peak Limestone)	Snake	513 m.	17 m.	1997 m.a.s.l.	no	Varied passages and speleothems
Squirrel Springs (“SQUI”)—wild (Fish Haven and Laketown dolomites)	Snake	16 m.	7 m.	2200 m.a.s.l.	yes	Sumps during wet years