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DOI: | 10.1111/grs.12034 |
Web URL(s): | https://onlinelibrary.wiley.com/doi/full/10.1111/grs.12034 Last checked: 07/13/2018 Access conditions: Item is within a limited-access website https://onlinelibrary.wiley.com/doi/pdf/10.1111/grs.12034 Last checked: 07/13/2018 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Report |
Author(s): | Tedder, Michelle;
Kirkman, Kevin;
Morris, Craig;
Fynn, Richard |
Author Affiliation: | Tedder, Kirkman, and Fynn: Grassland Science, School of Life Sciences, University of KwaZulu-Natal; Morris: Agricultural Research Council, Pietermaritzburg, South Africa; Fynn: Okvango Research Institute, University of Botswana, Maun, Botswana |
Title: | Tree-grass competition along a catenal gradient in a mesic grassland, South Africa |
Source: | Grassland Science. Vol. 60, No. 1, March 2014, p. 1-8. |
Publishing Information: | Oxford, England: Blackwell Pub. |
# of Pages: | 8 |
Related Web URL: | https://onlinelibrary.wiley.com/doi/abs/10.1111/grs.12034 Last checked: 07/13/2018 Notes: Abstract only |
Keywords: | TIC Keywords: Choice of species; Grasslands; Growth and development; Growth factors; Root depth; Tree root competition
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Geographic Terms: | South Africa |
Abstract/Contents: | "The interaction, both above and belowground, between tree saplings and the surrounding grass sward is dependent on solar radiation, temperature, rainfall, soil depth, tree species and sward composition. These factors, as well as level of sward defoliation, influence whether the system will remain as savanna or move towards a woodland or grassland state. The effects of above- and belowground competition between grasses and two Acacia species and the effects of soil depth on these interactions were examined by planting A. karroo and A. nilotica seedlings into a natural sward on three different soil depths. Three aboveground treatments: full shading, reduced shading by tying back the neighboring grasses and reduced shading by clipping, and two belowground treatments: full and no belowground competition, were used. Plant size increased with increasing soil depth, while belowground competitive intensity was unaffected. Removing belowground competition increased sapling biomass by half (P < 0.05) on all soil depths. By contrast, reduced shading had little effect at all soil depths, whereas sward clipping increased sapling biomass (47%) on shallow soils only (P = 0.027), indicating that encroachment on shallow soils may result from factors that decrease root vigor of the surrounding grasses rather than light competition. Irrespective of soil depth, root competition appeared to be the major factor influencing sapling growth rates, thus grazing management practices that reduce grass root productivity are expected to result in woody encroachment." |
Language: | English |
References: | 41 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Tedder, M., K. Kirkman, C. Morris, and R. Fynn. 2014. Tree-grass competition along a catenal gradient in a mesic grassland, South Africa. Grassland Science. 60(1):p. 1-8. |
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| DOI: 10.1111/grs.12034 |
| Web URL(s): https://onlinelibrary.wiley.com/doi/full/10.1111/grs.12034 Last checked: 07/13/2018 Access conditions: Item is within a limited-access website https://onlinelibrary.wiley.com/doi/pdf/10.1111/grs.12034 Last checked: 07/13/2018 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: b4979016 |
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