Unlike the well-studied, large conifer forests of the northern Sierra Nevada, southern California conifer forests are less-studied and represent only about 8% of the landscape. But much like the forests to the north, these valuable ecosystems are at risk of type-converting to other vegetation types.
Negro, K. and N. Molinari. 2019. Status and trend in fire activity in southern California yellow pine and mixed conifer forests. Forest Ecology and Management 441:20-31. https://doi.org/10.1016/j.foreco.2019.01.020