Skip to Main Content
Effects of elevated atmospheric CO2 and/or O3 on intra- and interspecific competitive ability of aspenAuthor(s): M. E. Kubiske; V. S. Quinn; P. E. Marquardt; D. F. Karnosky
Source: Plant Biology 9:342-355
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
PDF: View PDF (1.06 MB)
DescriptionThree model communities of trembling aspen (monoculture, and mixed with either paper birch or sugar maple) were grown for seven years in elevated atmospheric CO2 and O3 using Free Air CO2 Enrichment (FACE) technology. We utilized trends in species' importance, calculated as an index of volume growth and survival, as indications of shifting community composition. For the pure aspen communities, different clones emerged as having the highest change in relative importance values depending on the pollutant exposure. In the control and elevated CO2 treatments, clone 42E was rapidly becoming the most successful clone while under elevated O3, clone 8 L emerged as the dominant clone. In fact, growth of clone 8 L was greater in the elevated O3 treatment compared to controls. For the mixed aspen-birch community, importance of aspen and birch changed by -16% and +62%, respectively, in the controls. In the treatments, however, importance of aspen and birch changed by -27% and +87%, respectively, in elevated O3, and by -10% and +45%, respectively, in elevated CO2. Thus, the presence of elevated O3 hastened conversion of stands to paper birch, whereas the presence of elevated CO2 delayed it. Relative importance of aspen and maple changed by -2% and +3%, respectively, after seven years in the control treatments. But in elevated O3, relative importance of aspen and maple changed by -2% and +5%, respectively, and in elevated CO2 by +9 and -20%, respectively. Thus, elevated O3 slightly increases the rate of conversion of aspen stands to sugar maple, but maple is placed at a competitive disadvantage to aspen under elevated CO2.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationKubiske, M. E.; Quinn, V. S.; Marquardt, P. E.; Karnosky, D. F. 2007. Effects of elevated atmospheric CO2 and/or O3 on intra- and interspecific competitive ability of aspen. Plant Biology 9:342-355
KeywordsSugar maple (Acer saccharum), paper birch (Betula papyrifero), trembling aspen (Populus tremuloides), global change, growth
- Stem wood properties of Populus tremuloides, Betula papyrifera and Acer saccharum saplings after three years of treatments to elevated carbon dioxide and ozone
- Macronutrient deficiency symptoms in seedlings of four northern hardwoods.
- Scaling ozone responses of forest trees to the ecosystem level in a changing climate
XML: View XML