Portal de Periódicos da CAPES

Competition among Secondary-Successional Pine Communities: A Field Study of Effects and Responses

1999; Wiley; Volume: 80; Issue: 3 Linguagem: Inglês

10.2307/177023

1939-9170

Rebecca Mitchell, Bruce R. Zutter, Dean H. Gjerstad, Glenn R. Glover, C. W. Wood,

Ecology and Vegetation Dynamics Studies

EcologyVolume 80, Issue 3 p. 857-872 Article COMPETITION AMONG SECONDARY-SUCCESSIONAL PINE COMMUNITIES: A FIELD STUDY OF EFFECTS AND RESPONSES R. J. Mitchell, R. J. Mitchell Jones Ecological Research Center, Route 2, Box 2324, Newton, Georgia 31770 USASearch for more papers by this authorB. R. Zutter, B. R. Zutter School of Forestry, Auburn University, Auburn, Alabama 36849 USASearch for more papers by this authorD. H. Gjerstad, D. H. Gjerstad School of Forestry, Auburn University, Auburn, Alabama 36849 USASearch for more papers by this authorG. R. Glover, G. R. Glover School of Forestry, Auburn University, Auburn, Alabama 36849 USASearch for more papers by this authorC. W. Wood, C. W. Wood Department of Agronomy, Auburn University, Auburn, Alabama 36849 USASearch for more papers by this author R. J. Mitchell, R. J. Mitchell Jones Ecological Research Center, Route 2, Box 2324, Newton, Georgia 31770 USASearch for more papers by this authorB. R. Zutter, B. R. Zutter School of Forestry, Auburn University, Auburn, Alabama 36849 USASearch for more papers by this authorD. H. Gjerstad, D. H. Gjerstad School of Forestry, Auburn University, Auburn, Alabama 36849 USASearch for more papers by this authorG. R. Glover, G. R. Glover School of Forestry, Auburn University, Auburn, Alabama 36849 USASearch for more papers by this authorC. W. Wood, C. W. Wood Department of Agronomy, Auburn University, Auburn, Alabama 36849 USASearch for more papers by this author First published: 01 April 1999 https://doi.org/10.1890/0012-9658(1999)080[0857:CASSPC]2.0.CO;2Citations: 36Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract Three common associates on secondary-successional pine sites (Andropogon virginicus, Liquidambar styraciflua, and Pinus taeda) were established in a field study in which a wide array of plant densities and species proportions were established using an additive series design. To mimic a specific competitive scenario (i.e., a managed early-successional Pinus stand), Andropogon and Liquidambar were established a year prior to the establishment of Pinus. Competitive effect (the attenuation of resources) and competitive response (the growth of each species as a function of resource availability) were determined. Effect on soil water varied among species, depth of soil, and time. In the surface soil, soil water was largely influenced through non-uptake effects, while uptake effects were predominant in deeper portions of the solum. When competitor abundance was expressed on an aboveground biomass basis, rather than a density basis, species differences in effects on soil water were eliminated. Differences among the species in effects on soil water per unit leaf area or leaf biomass appear to be largely explained by differences in stomatal conductance. Predawn leaf-water potential was integrated over the season using a water-stress integral. Analysis of the water-stress integral suggested that Liquidambar and Andropogon both affected water available to Pinus; however, only Liquidambar affected Andropogon, and only Andropogon affected seasonal water available to Liquidambar. Light was most strongly influenced by Liquidambar density; however, as Andropogon density increased, the effects of Liquidambar were reduced. Andropogon response was correlated with light but not with water stress or leaf nitrogen. This reflects high light requirements and high water use efficiency of C4 plants. Liquidambar response was related to water stress and leaf nitrogen, perhaps reflecting the greater nitrogen requirements of hardwoods. Pinus response was significantly related to all three resources individually, i.e., water stress, light, and leaf nitrogen. Pinus response was better explained by a regression model that included light and water stress than by water stress or light alone. Pinus growth as a function of water stress and light indicated that communities dominated by Liquidambar largely reduced Pinus growth through reduction in light, while communities dominated by Andropogon reduced Pinus growth primarily by increasing water stress. In mixed communities of Liquidambar and Andropogon, pine growth was constrained more equally by light and water stress. Citing Literature Volume80, Issue3April 1999Pages 857-872 RelatedInformation