Fire tolerance of perennial grass tussocks in a savanna woodland
Article first published online: 22 FEB 2010
© 2010 The Authors. Journal compilation © 2010 Ecological Society of Australia
Volume 35, Issue 8, pages 858–861, December 2010
How to Cite
SCOTT, K. A., SETTERFIELD, S. A., DOUGLAS, M. M. and ANDERSEN, A. N. (2010), Fire tolerance of perennial grass tussocks in a savanna woodland. Austral Ecology, 35: 858–861. doi: 10.1111/j.1442-9993.2009.02091.x
- Issue published online: 22 FEB 2010
- Article first published online: 22 FEB 2010
- Accepted for publication October 2009.
- fire regime;
- perennial grass;
- tropical savanna
Grass populations in tropical savannas are highly resilient in relation to different fire regimes, but the mechanisms conferring such resilience have been poorly studied. Here we examine one such mechanism, high adult survival during fire, for three perennial grass species in an Australian savanna: Eriachne triseta Nees ex Steud, Eriachne avenacea R.Br and Chrysopogon latifolius S.T.Blake. The study examined survivorship after 3 years, at plots subject to experimental fire regimes (experiencing 0, 1, 2 or 3 fires over the study period) at the Territory Wildlife Park near Darwin in the Northern Territory, Australia. Mean survivorship was 79.9%, 64.3% and 62.0% for E. avenacea, E. triseta and C. latifolius respectively. For the two species of Eriachne, mean survivorship was highest (E. avenacea, 94.6%; E. triseta, 77.1%) in unburnt plots, whereas survivorship of C. latifolius was highest (71.7%) under highest fire frequency. However, variation in survivorship among fire regime treatments was not statistically significant for any of the study species. This negligible difference in survivorship among regimes points to fire tolerance (sprouting ability) as an important mechanism contributing to the resilience and persistence of perennial grasses in these savannas.