Julie Coetzee

PhD University of the Witwatersrand (2003)

Senior Research Officer

'phone +27 [0]46 603 8702
Fax +27 [0]46 622-8959
e-mail julie.coetzee@ru.ac.za

Research interests

Biological control
Invasion biology
Insect physiology
Species distribution modelling
Biostatistics

Professional memberships

Entomological Society of Southern Africa

Current achievements

NRF Y rating

Personal interests

Birding

Post-graduate supervision

Current students

Grant Martin (MSc – Rhodes University) – The potential for the introduction, establishment and spread of submerged invasive aquatic plants in South Africa.

Colin Fordham (MSc – Rhodes Univeresity) – Investigating alternative stable states in aquatic systems - Myriophyllum spicatum and Eichhornia crassipes invasions on the Vaal River, South Africa.

Bronwen May (MSc – Rhodes University) - To compensate or defend: investigations into insect-induced aquatic plant defences.

Past students

Taryn Morris (MSc - Wits University, 2008) - The impacts of invasive alien plant clearing on riparian vegetation recovery along the Sabie River in the Kruger National Park.

Kyle Harris (MSc - University of Pretoria, 2009) - Assessing and monitoring local scale impacts of Opuntia stricta on arthropod assemblages in the Kruger National Park, South Africa.

Luke Schutz (MSc - Wits University, 2007) - Insect communities associated with three submerged aquatic macrophytes, with emphasis on the phytophagous species.

Some recent publications

Hill, M.P., Coetzee, J.A., Julien, M.H. and Center, T. 2010.  Waterhyacinth.  In: Encyclopedia of Biological Invasions. (Eds). D. Simberloff and M.  Rejmanek. In Press

Coetzee, J.A. and Hill, M.P. 2009.  Management of Invasive Aquatic Plants.  In: Clout, M.N. & Williams, P.A.  (eds)  Invasive Species Management. A Handbook of Techniques (Techniques in Ecology and Conservation). Oxford University Press, London, pp. 141-152.

Coetzee, J.A., Hill, M.P., Julien, M.H., Center, T.D. and Cordo, H.A. 2009. 11. Eichhornia crassipes.  In: Muniappan, R., Reddy, G.V.P., Raman, A. and Gandhi, V.P. (eds) Biological control of tropical weeds using arthropods. Cambridge University Press, Cambridge, UK. Pp. 181-208.

Coetzee, J.A., Bownes, A. & Martin, G.D. 2011. Biological control of submerged aquatic macrophytes. African Entomology in press.

Coetzee, J.A., Hill, M.P., Byrne, M.J. and Bownes, A.B. 2011. A review of the biological control programmes on Eichhornia crassipes (C. Mart.) Solms (Pontederiacaeae), Salvinia molesta D.S. Mitch. (Salviniaceae), Pistia stratiotes L. (Araceae), Myriophyllum aquaticum (Vell.) Verdc. (Haloragaceae) and Azolla filiculoides Lam. (Azollaceae) in South Africa since 1999. African Entomology in press.

Martin, G.D. & Coetzee, J.A. 2011. Fresh water aquatic plant invasion risks posed by the aquarium trade, aquarists and the internet trade in South Africa Water SA: 37: 371 - 380.

Paterson, I.D., Coetzee, J.A., Hill, M.P. & Downie, D.A. 2011. A pre-release assessment of the relationship between the invasive alien plant, Pereskia aculeata Miller (Cactaceae), and native plant biodiversity in South Africa. Biological Control 57: 59-65.

Albano Pérez, E., Coetzee J.A., Ruiz Téllez T. & Hill M.P. 2011. Water hyacinth (Eichhornia crassipes) seed bank dynamics in South Africa: the regeneration potential of the infestation. South African Journal of Botany 77: 795-800Baars, J-R., Coetzee, J.A., Martin, G.D., Hill, M.P. & Caffrey, J.M. 2010. Natural enemies from South Africa for biological control of Lagarosiphon major (Ridl.) Moss ex Wager (Hydrocharitaceae) in Europe. Hydrobiologia 656:149–158.

Diop, O., Coetzee, J.A. and Hill, M.P. (2010). Impact of different densities of Neohydronomus affinis Hustache (Coleoptera: Cuculionidae) on Pistia stratiotes Linnaeus (Araceae) under laboratory conditions. African Journal of Aquatic Science 35(3): 267–271.

Van Driesche, R.G., R.I. Carruthers, T. Center, M.S. Hoddle, J. Hough-Goldstein, L. Morin, L. Smith, D.L. Wagner, B. Blossey, V. Brancatini, R. Casagrande, C.E. Causton, J.A. Coetzee, J. Cuda J. Ding, S.V. Fowler, J.H. Frank, R. Fuester, J. Goolsby, M. Grodowitz, T.A. Heard, M.P. Hill, J.H. Hoffmann, J. Huber, M. Julien, M.T.K. Kairo, M. Kenis, P. Mason J. Medal, R. Messing, R. Miller, A. Moore, P. Neuenschwander, R. Newman, H. Norambuena, W.A. Palmer, R. Pemberton, A. Perez Panduro, P.D. Pratt, M. Rayamajhi, S. Salom, D. Sands, S. Schooler, A. Sheppard, R. Shaw, M. Schwarzländer, P.W. Tipping and R.D. van Klinken (2010). Classical Biological Control for the Protection of Natural Ecosystems. Biological Control Supplement 1: 2-33.