Today, forest remnants are isolated along mountain ridges, karst hills, and steeper valleys where agriculture is not prevalent. Significant remaining tracts of the evergreen forests include Qinglongxia Scenic Area, the Cang Mountains, Mount Jizu, the Western Hills Forest Reserve, and the Ailao Mountain Nature Reserve. In other places in the ecoregion, the evergreen forests have been replaced by strands of dominating Yunnan Pine. It is unclear to what extent Yunnan Pine coexisted in the Yunnan Plateau subtropical evergreen forests prior to agricultural development in the region.