Study results from arid regions in Southern California show how fire trends differ based on unique sets of circumstances. This brief discuses how combinations of direct drivers (like powerline and roadside ignitions), indirect drivers (like invasive grasses, air pollution, and landscape fragmentation terrestrial intactness) and unknown factors cause diversity in fire trends.
Syphard, A.D., J.E. Keeley, and J.T. Abatzoglou. 2017. Trends and drivers of fire activity vary across California aridland ecosystems. Journal of Arid Environments 144:110-122. http://doi.org/10.1016/j.jaridenv.2017.03.017