Perennial (shrubs, perennial grasses) and Annual Plant Data from Transects at the Desert Tortoise Research Natural Area, 1989, 1993, 1997, 2002, and 2012

Data on annual and perennial plants were collected during four survey years (1989, 1993, 1997, and 2012) at a 7.77 sq. km the Desert Tortoise Research Natural Area in the western Mojave Desert as part of a long-term research project on populations and habitat of the threatened desert tortoise (Gopherus agassizii) spanning 34 years. The data collection and analysis involved comparisons of vegetation inside and outside the fenced Desert Tortoise Research Natural Area.