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| DOI: | 10.1111/j.1469-8137.2010.03338.x |
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| Web URL(s): | http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2010.03338.x/full
Last checked: 09/22/2010
Access conditions: Item is within a limited access website
http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2010.03338.x/pdf
Last checked: 09/01/2010
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Kulmatiski, Andrew;
Beard, Karen H.;
Verweij, Richard J. T.;
February, Edmund C. |
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| Author Affiliation: | Kulmatiski: Department of Biological Sciences, University of Alaska, Anchorage, AK, USA; Beard: Department of Wildland Resources, Ecology Center, Utah State University, Logan, UT, USA; Verweij and February: Department of Botany, University of Cape Town, Private Bag X3, Rondebosch, South Africa |
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| Title: | A depth-controlled tracer technique measures vertical, horizontal and temporal patterns of water use by trees and grasses in a subtropical savanna |
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| Section: | Research
Other records with the "Research" Section
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| Source: | New Phytologist. Vol. 188, No. 1, October 2010, p. 199-209. |
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| Publishing Information: | Oxford, England: Blackwell Publishing, for the New Phytologist Trust |
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| # of Pages: | 11 |
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| Related Web URL: | http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2010.03338.x/abstract
Last checked: 09/22/2010
Notes: Abstract only |
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| Keywords: | TIC Keywords: Heavy water; Precipitation; Root analysis; Root depth; Root weight; Soil sampling; Soil water; Soil water potential; Tracer techniques; Water absorption; Water availability; Woody plant-grass competition
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| Abstract/Contents: | "As described in the two-layer hypothesis, woody plants are often assumed to use deep soils to avoid competition with grasses. Yet the direct measurements of root activity needed to test this hypothesis are rare. Here, we injected deuterated water into four soil depths, at four times of year, to measure the vertical and horizontal location of water uptake by trees and grasses in a mesic savanna in Kruger National Park, South Africa. Trees absorbed 24, 59, 14 and 4% of tracer from the 5, 20, 50, and 120 cm depths, respectively, while grasses absorbed 61, 29, 9 and 0.3% of tracer from the same depths. Only 44% of root mass was in the top 20 cm. Trees absorbed tracer under and beyond their crowns, while 98% of tracer absorbed by grasses came from directly under the stem. Trees and grasses partitioned soil resources (20 vs 5 cm), but this partitioning did not reflect, as suggested by the two-layer hypothesis, the ability of trees to access deep soil water that was unavailable to grasses. Because root mass was a poor indicator of root activity, our results highlight the importance of precise root activity measurements." |
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| Language: | English |
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| References: | 60 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kulmatiski, A., K. H. Beard, R. J. T. Verweij, and E. C. February. 2010. A depth-controlled tracer technique measures vertical, horizontal and temporal patterns of water use by trees and grasses in a subtropical savanna. New Phytol. 188(1):p. 199-209. |
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| DOI: 10.1111/j.1469-8137.2010.03338.x |
| Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2010.03338.x/full
Last checked: 09/22/2010
Access conditions: Item is within a limited access website
http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2010.03338.x/pdf
Last checked: 09/01/2010
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2219226 |
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