Due to an increase in air pollutants, heavy metal contaminates, and other adverse ecological conditions that plants near a road endure, it was hypothesized that plant species situated near a road would have a detectable decrease in photosynthetic performance when compared to plants away from the road. This investigation evaluated the in vivo photosynthetic status of two Malasma Laurina pairs with differing microhabitats, adjacent to the Pacific Coast Highway and 100 meters away from a Pacific Coast Highway. Maximum quantum yield and stomatal conductance measurements were recorded for each group. On average, the maximum quantum yield was greater on plants near the road.
Bermea, Jessica; Clayton, Haley; and Klobas, Jack, "The Effect of Proximity to a Highway on the Health of Malosma laurina Leaves" (2011). Pepperdine University, All Undergraduate Student Research. Paper 25.