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Scaling ozone responses of forest trees to the ecosystem level in a changing climateAuthor(s): D.F. Karnosky; K.S. Pregitzer; D.R. Zak; M.E. Kubiske; G.R. Hendrey; D. Weinstein; M. Nosal; K.E. Percy
Source: Plant, Cell and Environment. 28: 965-981.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
PDF: Download Publication (1.6 MB)
DescriptionMany uncertainties remain regarding how climate change will alter the structure and function of forest ecosystems. At the Aspen FACE experiment in northern Wisconsin, we are attempting to understand how an aspen/birch/maple forest ecosystem responds to long-term exposure to elevated carbon dioxide (CO2) and ozone (O3), alone and in combination, from establishment onward. We examine how O3 affects the flow of carbon through the ecosystem from the leaf level through to the roots and into the soil microorganisms in present and future atmospheric CO2 conditions. We provide evidence of adverse effects of O3, with or without co-occurring elevated CO2, that cascade through the entire ecosystem impacting complex trophic interactions and food webs on all three species in the study: trembling aspen (Populus tremuloides Michx.), paper birch (Betula papyrifera Marsh), and sugar maple (Acer saccharum Marsh).
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CitationKarnosky, D.F.; Pregitzer, K.S.; Zak, D.R.; Kubiske, M.E.; Hendrey, G.R.; Weinstein, D.; Nosal, M.; Percy, K.E. 2005. Scaling ozone responses of forest trees to the ecosystem level in a changing climate. Plant, Cell and Environment. 28: 965-981.
KeywordsPopulus tremuloides, carbon accumulation and allocation, carbon dioxide, C and N cycling, climate change, ecosystem scaling, modelling, pest interactions, trembling aspen, tropospheric ozone
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