Two populations of mountain lions in Southern California face a significant threat of extinction if actions aren’t taken to protect their environment and safeguard animal transit routes through increasingly developed areas, a new study warns.While the species isn’t currently in danger of statewide extinction, the big cats in the Santa Ana and Santa Monica Mountains (a total of about 42 animals) have as much as a 21 percent chance of vanishing in the next 50 years.Earlier this month, the Ventura County Board of Supervisors passed a groundbreaking new law protecting “wildlife corridors” and other land use restrictions to safeguard movement of the animals through the region. The wildlife passages are now part of the zoning law in the area next to Los Angeles County.“We urgently need state-led action to build wildlife crossings and improve habitat connectivity,” J.P. Rose, attorney for the Center for Biological Diversity