Evidence of Growth Reduction in Ozone-Injured Jeffrey Pine(Pinus Jeffreyi Grev.and Balf.) in Sequoia and Kings Canyon National Parks

An Evaluation of the Effects of Ozone Injury on Radial Growth of Ponderosa Pine(Pinus ponderosa)in the Southern Sierra Nevada

“…Ponderosa pine stands sampled in this study were located in the same geographic area as Jeffrey pine in our previous study, 11 -12 so ozone exposure should be similar for both species. The contrast in growth effects in symptomatic ponderosa pine and Jeffrey pine is of considerable interest, because these species are normally considered equally sensitive to ozone.…”

“…- 11 We suspected that ponderosa pine may have suffered a similar growth reduction in recent years because it has levels of symptomatic ozone injury similar to that of Jeffrey pine at nearby locations. We investigated radial growth in the lower stems of ponderosa pine to determine possible changes in growth patterns of trees with symptoms of ozone injury.…”

The response of clones of Populus tremuloides differing in sensitivity to ozone in the field

“…The relationship of foliar injury and growth has been debated : some studies show that symptomatic individuals tend to grow more slowly than asymptomatic ones (McLaughlin et al, 1982 ;Peterson et al, 1987 ;Muir & McCune, 1988), but growth reduction can occur without visible foliar symptoms (Reich & Amundson, 1984, 1985Reich et al, 1986). Conversely, foliar injury may occur without ever affecting growth (McClenahan, 1979 ;Patton, 1981).…”

A Passive Sampler for Atmospheric Ozone

“…nation of forests and crops exposure to ambient ozone, which has been implicated in widespread damage to both forested areas 8 and agricultural crops. 9 Another outdoor application of the ozone passive sampler described in this article would involve measuring ambient ozone as a costeffective supplement to continuous analyzers in regional air quality modeling studies 10 in order to increase the spatial resolution of the monitoring network.…”