The occurrence and causes of episodic recruitment of Astrebla spp.
The occurrence and causes of episodic recruitment of Astrebla spp. Conference Paper
16th Australian Rangeland Society Biennial Conference
- Author(s): Orr, D.M., Silcock. R.
- Published: 2010
- Publisher: Australian Rangeland Society
Abstract: This paper examines the seasonal climate patterns resulting in three large and apparently rare episodic recruitments of Astrebla spp. in Queensland. Each of these recruitments occurred following a 3-year rainfall sequence of: above average rainfall in the first summer, below average rainfall throughout the second year followed by above average rainfall in the third summer. Each of these recruitment events was associated with the occurrence of the El Nino Southern Oscillation weather phenomenon. It is concluded that modelling the frequency of recruitment could identify those regions needing more precise grazing management.