Sedgwick Reserve

06 Aug, 03 AM - 06 Aug, 07 AM

This project involves examining the effects of two pollutants in the Los Angeles air basin that are suspected to be largely responsible for the disappearance of more than half of the lichen species in the area, ozone and nitric acid. The project will involve transplanting the pollution sensitive lichen Ramalina mensiezii from the Sedgwick Reserve the Los Angeles area for experimental treatments. In the fall of 2006 we will conduct fumigation experiments in chambers at UC Riverside. These investigations involve exposing the lichen thalli to ozone and nitric acid in a 2 X 2 factoral experiment. The lichens will be monitored for photosynthetic capacity and chlorophyll content at set intervals during treatment to determine the effects of each treatment. In the summer of 2007 we will conduct a transplant experiment of Ramalina mensiezii from the reserve into ambient air at the San Dimas Research Station to examine the effects of the summer ozone season combined with high levels of nitrogen deposition. On site transplants will be necessary at the Sedgwick Reserve to control for transplant effects. If there is an abundant population of Psuedocyphallaria anthraspis, we would like to include this lichen in our study. The following years of the study will involve using lichens that are found in the Sierra Nevada and barring unforseen events, we will not need access to the Sedgwick Reserve.

Visit #10654 @Sedgwick Reserve

Approved

Under Project # 7082 | Research

Effects of ozone and nitric acid on lichens in the Los Angeles air basin

graduate_student - Arizona State University

Reservation Members(s)

Jennifer Riddell Aug 6, 2006 (1 days)

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Day Use Only 1 Aug 6 (4 hours)