| consequences of elevated carbon dioxide and ozone for foliar chemical composition and dynamics in trembling aspen (populus tremuloides) and paper birch (betula papyrifera). | atmospheric chemical composition affects foliar chemical composition, which in turn influences the dynamics of both herbivory and decomposition in ecosystems. we assessed the independent and interactive effects of co2 and o3 fumigation on foliar chemistry of quaking aspen (populus tremuloides) and paper birch (betula papyrifera) at a free-air co2 enrichment (face) facility in northern wisconsin. leaf samples were collected at five time periods during a single growing season, and analyzed for nit ... | 2001 | 11789920 |