The USFS Northern Research Station and Forest County Potawatomi Tribe co-developed a study to test the effects of ozone on twelve herbaceous plant species that hold cultural importance to the tribe. Three different trials at a W126 of 7.0 ppm-hr, one trial at a W126 of 10.0 ppm-hr, and one trial at a W126 of 15.0 ppm-hr was conducted. Net photosynthesis was measured each week throughout the trial. After each trial, all plants were harvested, separated into aboveground or belowground plant tissue, then dried and weighed for biomass. Overall, our results show that the species measured are tolerant of ozone up to concentrations that comprise a W126 of 15.0 ppm-hr.

¹ USDA Forest Service Northern Research Station, Rhinelander, WI

² Forest County Potawatomi, Crandon, WI

* Corresponding author: Dustin.Bronson@usda.gov