San Francisco Chronicle: Up to two-thirds of California’s native plants could lose most of their current habitat if temperatures increase sharply over the next century, according to a new study. Researchers from the University of California, Berkeley, Duke University and other institutions released maps Tuesday showing how global warming could affect 2,300 plant species, including live oak, blue oak, scrub oak, California bay laurel and whiteleaf manzanita. The study found that up to 66 percent of …