Water hyacinth decline across Lake Victoria—Was it caused by climatic perturbation or biological control? A reply
- 作者：Adrian E. Williams ; Robert E. Hecky ; Hamish C. Duthie
- 关键词：Eichhornia crassipes ; El Niñ ; o ; Lake Victoria ; Water hyacinth ; Weevils
- 刊名：Aquatic Botany
- 出版年：2007
- 期刊代码：17_03043770
- 类别：abs
- 出版时间：July 2007
- 卷：87
- 期：1
- 页码：94-96
- 文件大小：131 K
摘要
Several authors have identified that a combination of interacting factors involving the El Niño of 1997/1998 and biocontrol by weevils resulted in the rapid reduction of water hyacinth across Lake Victoria [Albright, T.P., Moorhouse, T.G., McNabb, J., 2004. The rise and fall of water hyacinth in Lake Victoria and the Kagera River Basin 1989–2001. J. Aquat. Plant Manage. 42, 73–84; Williams, A.E., Duthie, H.C., Hecky, R.E., 2005. Water hyacinth in Lake Victoria: why did it vanish so quickly and will it return? Aquat. Bot. 81, 300–314; Wilson, J.R.U., Ajuonu, O., Center, T.D., Hill, M.P., Julien, M.H., Katagira, F.F., Neuenschwander, P., Njoka, S.W., Ogwang, J., Reeder, R.H., Van, T., 2007. The decline of water hyacinth on Lake Victoria was due to biological control by Neochetina spp. Aquat. Bot. 87, 90–93]. It would appear to us that any disagreement between these papers centres on the order and magnitude of the contributory factors. In this reply we reiterate that whilst weevils almost certainly played their part, the synchronous lake wide reduction of water hyacinth during the second quarter of 1998 was the result of the 1997/1998 El Niño.