So what does all of this mean? Moss can take up extra nitrogen from pollution, but because there is less moss where the pollution occurs, they aren't going to solve the problem. We need to help preserve the fragile moss crusts in order for them to help deal with the nitrogen pollution!
The results of this experiment are published in the article: Ball, B. and Alvarez Guevara, J. The nutrient plasticity of moss-dominated crust in the urbanized Sonoran Desert. Plant and Soil.