MIAMI- Bulldozers downing trees on a property targeted for a Walmart-anchored shopping center were ordered to stop work after a federal judge issued an emergency injunction sought by environmentalists fighting to save the vanishing forest. The judge issued the injunction Friday, hours after the Center for Biological Diversity and three other groups sued to overturn a decision earlier this week that cleared the way for the mall, 900 apartments and a parking lot. The land near Zoo Miami had long been targeted for conservation and is part of what was once one of the largest tracks of pine rockland, a globally imperiled forest, outside Everglades National Park. In her ruling, Judge Ursula Ungaro said the plaintiffs showed a likelihood of winning their case and that ongoing work could cause irreparable harm.