Below-ground competition between trees and grasses may overwhelm the facilitative effects of hydraulic lift

Ecology Letters

Volumn 7, Issue 8, 2004, Pages 623-631

  Ludwig, F ^a,c   Dawson, T E ^b   Prins, H H T ^a   Berendse, F ^a   De Kroon, H ^a,c  

^a WAGENINGEN UNIVERSITY   (Netherlands)

^b UNIVERSITY OF CALIFORNIA   (United States)

^c RADBOUD UNIVERSITY NIJMEGEN   (Netherlands)

Author keywords

Acacia tortilis; Facilitation; Soil water; Stable isotopes; Tree grass interactions

Indexed keywords

COMPETITION (ECOLOGY); GRASS; HYDRAULIC CONDUCTIVITY; INTRASPECIFIC COMPETITION; STABLE ISOTOPE; TREE;

AFRICA; EAST AFRICA; SUB-SAHARAN AFRICA;

ACACIA; ACACIA TORTILIS; POACEAE;

EID: 3843099179     PISSN: 1461023X     EISSN: None     Source Type: Journal    
DOI: 10.1111/j.1461-0248.2004.00615.x     Document Type: Article

References (48)

1. Anderson, G.D. & Herlocker, D.J. (1973). Soil factors affecting the distribution of the vegetation types and their utilization by wild animals in Ngorongoro crater, Tanzania. J. Ecol., 61, 627-651.
2. Belsky, A.J. (1994). Influences of trees on savanna productivity: test of shade, nutrients, and tree-grass competition. Ecology, 75, 922-932.
3. Belsky, A.J., Amundson, R.G., Duxbury, J.M., Riha, S.J., Ali, A.R. & Mwonga, S.M. (1989). The effects of trees on their physical, chemical, and biological environments in a semi-arid savanna in Kenya. J. Appl. Ecol., 26, 1005-1024.
4. Bertness, M.D. & Callaway, R.M. (1994). Positive interactions in communities. Trends Ecol. Evol., 9, 191-193.
5. Black, R.A., Richards, J.H. & Manwaring, J.H. (1994). Nutrient uptake from enriched soil microsites by three great basin perennials. Ecology, 75, 110-122.
6. Bruno, J.F., Stachowicz, J.J., & Bertness, M.D. (2003). Inclusion of facilitation into ecological theory. Trends Ecol. Evol., 18, 119-125.
7. Caldwell, M.M., Dawson, T.E. & Richards, J.H. (1998). Hydraulic lift: consequences of water efflux for the roots of plants. Oecologia, 113, 151-161.
8. Callaway, R.M. & Pennings, S.C. (2000). Facilitation may buffer competitive effects: Indirect and diffuse interactions among salt marsh plants. Am. Nat., 156, 416-424.
9. Callaway, R.M. & Walker, L.R. (1997). Competition and facilitation: a synthetic approach to interactions in plant communities. Ecology, 78, 1958-1965.
10. Carrow, N.C. (1996). Drought resistance aspects of turfgrasses in the southeast: root-shoot responses. Crop Sci., 36, 687-694.
11. Dawson, T.E. (1993). Hydraulic lift and water use by plants: implications for water balance, performance and plant-plant interactions. Oecologia, 95, 565-574.
12. Dawson, T.E. & Ehleringer, J.R. (1993). Isotopic enrichment of water in the "woody" tissue of plants: implications for plant water source, water uptake, and other studies which use the stable isotopic composition of cellulose. Geochim. Cosmochim. Acta, 57, 3487-3492.
13. Dawson, T.E., Mambelli, S., Plamboeck, A.J., Templer, P.H. & Tu, K.P. (2002). Stable isotopes in plant ecology. Ann. Rev. Ecol. Sys., 33, 507-559.
14. Ehleringer, J.R. & Dawson, T.E. (1992). Water uptake by plants: perspectives from stable isotope composition. Plant Cell Env., 15, 1073-1082.
15. Ehleringer, J.R., Roden, J. & Dawson, T.E. (2000). Assessing ecosystem-level water relations through stable isotope analyses. In: Methods in Ecosystem Science (eds Sala, O.E., Jackson, R.B., Mooney, H.A. & Howarth, R.W.). Springer Verlag, New York, pp. 181-198.
16. Franzluebbers, A.J., Stuedemann, J.A. & Wilkinson, S.R. (2002). Bermudagrass management in the southern piedmont USA II. soil phosphorus. Soil Sci. Soc. Am. J., 66, 291-298.
17. Hesla, B.I., Tieszen, H.L. & Boutton, T.W. (1985). Seasonal water relations of savanna shrubs and grasses in Kenya, East Africa. J. Arid Environ., 8, 15-31.
18. Higgins, S.I., Bond, W.J. & Trollope, S.W. (2000). Fire, resprouting and variability: A recipe for grass-tree coexistence in savanna. J. Ecol., 88, 213-229.
19. Hitchcock, A.S. & Chase, A. (1971). Manual of the Grasses of the United States. Dover Press, New York, (revised and reprinted from the 1950 USDA publication).
20. Holzapfel, C. & Mahall, B.E. (1999). Bidirectional facilitation and interference between shrubs and annuals in the Mojave Desert. Ecology, 80, 1747-1761.
21. Horton, J.L. & Hart, S.C. (1998). Hydraulic Lift: a potentially important ecosystem process. Trends Ecol. Evol., 13, 232-235.
22. Jackson, R.B., Sperry, J.S. & Dawson, T.E. (2000). Root water uptake and transport: using physiological processes in global predictions. Trends Plant Sci., 5, 482-488.
23. Joffre, R. & Rambal, S. (1988). Soil water improvement by trees in the rangelands of southern Spain. Acta Oecol., 9, 405-422.
24. Knoop, W.T. & Walker, B.H. (1985). Interactions of woody and herbaceous vegetation in a Southern African savanna. J. Ecol., 73, 235-253.
25. Koerselman, W. & Meuleman, A.F.M. (1996). The vegetation N:P ratio a new tool to detect the nature of nutrient limitation. J. Appl. Ecol., 33, 1441-1450.
26. Le Roux, X., Bariac, T. & Mariotti, A. (1995). Spatial partitioning of the soil water resource between grass and shrub components in a West African humid savanna. Oecologia, 104, 147-155.
27. Ludwig, F. (2001). Tree-grass interactions on an East African savanna: the effects of competition, facilitation and hydraulic lift. In: Tropical Resource Management Papers, Vol. 39. Wageningen University, The Netherlands.
28. Ludwig, F., De Kroon, H., Prins, H.H.T. & Berendse, F. (2001). The effect of nutrients and shade on tree-grass interactions on an East African savanna. J. Veg. Sci., 12, 579-588.
29. Ludwig, F., Dawson, T.E., De Kroon, H., Berendse, F & Prins, H.H.T. (2003). Hydraulic lift in Acacia tortilis trees on an East African savanna. Oecologia, 134, 293-300.
30. Ludwig, F., De Kroon, H., Berendse, F. & Prins, H.H.T. (2004). The influence of savanna trees on nutrient, water and light availability and the understorey vegetation. Plant Ecol., 170, 93-105.
31. McClaren, M.P. & Bartolome, J.W. (1989). Effect of Quercus douglasii (Fagaceae) on herbaceous understory along a rainfall gradient. Madroño, 36, 141-153.
32. Meinzer, F.C., Clearwater, M.J. & Goldstein, G. (2001). Water transport in trees: current perspectives, new insights and some controversies. Env. Exp. Bot., 45, 239-262.
33. Mordelet, P., Menaut, J.C. & Mariotti, A. (1997). Tree and grass rooting patterns in an African humid savanna. J. Veg. Sci., 8, 65-70.
34. Novozamski, I., Houba, V.J.G., Van Eck, R. & Van Vark, W. (1983). A novel digestion technique for multi-element plant analysis. Comm. Soil Sci. Plant Anal., 14, 239-249.
35. Olff, H., Ritchie, J.T. & Prins, H.H.T. (2002). Global environmental controls of diversity in large herbivores. Nature, 415, 901-904.
36. Prins, H.H.T. (1996). Ecology and Behaviour of the African Buffalo. Chapman and Hall, London.
37. Prins, H.H.T. & Van der Jeugd, H.P. (1993). Herbivore population crashes and woodland structure in East Africa. J. Ecol., 81, 305-314.
38. Querejeta, J.I., Egerton-Warburton, L.M. & Allen, M.F. (2003). Direct nocturnal water transfer from oaks to their micorrhizal symbionts during severe soil drying. Oecologia, 134, 55-64.
39. Richards, J.H. & Caldwell, M.M. (1987). Hydraulic lift: substantial nocturnal water transport between soil layers by Artemesia tridentata roots. Oecologia, 73, 486-489.
40. Sala, O.E., Golluscio, R.A., Lauenroth, W.K. & Soriano, A. (1989). Resource partitioning between shrubs and grasses in the Patagonian steppe. Oecologia, 81, 501-505.
41. Scholes, R.J. & Archer, S.R. (1997). Tree-grass interactions in savannas. Ann. Rev. Ecol. Sys., 28, 517-544.
42. Seghieri, J. (1995). The rooting patterns of woody and herbaceous plants in a savanna; are they complementary or in competition? Afr. J. Ecol., 33, 358-365.
43. 2 for Keeling plot applications. Rap. Comm. Mass Spec., 15, 952-956.
44. Voeten, M.M. & Prins, H.H.T. (1999). Resource partitioning between sympatric wild and domestic herbivores in the Tarangire region of Tanzania. Oecologia, 120, 287-294.
45. Walter, H. (1971). Ecology of Tropical and Subtropical Vegetation. Oliver and Boyd, Edinburgh.
46. Weltzin, J.F. & Coughenour, M.B. (1990). Savanna tree influence on understorey vegetation and soil nutrients in northwestern Kenya. J. Veg. Sci., 1, 325-334.
47. Yoder, C.K. & Nowak, R.S. (1999). Hydraulic lift among native plant species in the Mojave Desert. Plant Soil, 215, 93-102.
48. Yoder, C.K. & Nowak, R.S. (2000). Phosphorus acquisition by Bromus mdritensis ssp. rubens from soil interspaces shared with Mojave Desert Shrubs. Fuct. Ecol., 14, 685-692.