Articles | Volume 23, issue 3
https://doi.org/10.5194/hess-23-1553-2019
https://doi.org/10.5194/hess-23-1553-2019
Research article
 | 
18 Mar 2019
Research article |  | 18 Mar 2019

Water-use dynamics of an alien-invaded riparian forest within the summer rainfall zone of South Africa

Bruce C. Scott-Shaw and Colin S. Everson

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Revised manuscript accepted for HESS
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Cited articles

Acocks, J. P. H.: Veld types of South Africa. 3nd edition, Mem. Botanical Survey of South Africa, 57, 1–146, 1988. 
Allen, S. J. and Grime, V. L.: Measurements of transpiration from savannah shrubs using sap flow gauges, Agr. Forest Meteorol., 75, 23–41, 1994. 
Askey-Dorin, M., Petit, N., Robins, L., and McDonald, D.: The role of vegetation in riparian management, in: Riparian Land Management Technical Guidelines, Vol. 1. Principles of Sound Management, edited by: Lovett, S. and Price, P., LWRRDC Canberra, 97–120, 1999. 
Burgess, S. O., Adams, M. A., Turner, N. C., Beverly, C. R., Ong, C. K., Khan, A. A. H., and Bleby, T. M.: An improved heat pulse method to measure low and reverse rates of sap flow in woody plants, Tree Physiol., 21, 589–598, 2001. 
Clulow, A. D., Everson, C. S., Price, J. S., Jewitt, G. P. W., and Scott-Shaw, B. C.: Water-use dynamics of a peat swamp forest and a dune forest in Maputaland, South Africa, Hydrol. Earth Syst. Sci., 17, 2053–2067, https://doi.org/10.5194/hess-17-2053-2013, 2013. 
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The research undertaken for this study has allowed for an accurate direct comparison of indigenous and introduced tree water use. The measurements of trees growing in the understorey indicate significant water use in the subcanopy layer. The results showed that individual tree water use is largely inter-species specific. The introduced species remain active during the dry winter periods, resulting in their cumulative water use being significantly greater than that of the indigenous species.