The desert tortoise population is in steep decline — in some areas, the population has decreased by 90%. Each year, the Mojave Desert Land Trust heads out to areas of critical tortoise habitat looking for signs of hope for this threatened species. — By Jessica Graybill, Mojave Desert Land Trust Social Media Manager Tortoise surveys are an exercise in concentration and in being present. Lined up at 10-meter intervals called transects, each member of the team keeps their eyes on the ground as they walk straight lines through 500 x 500 square meter…