Lottery coexistence models extended to plants with disjoint generations
Article first published online: 24 FEB 2009
1995 IAVS - the International Association of Vegetation Science
Journal of Vegetation Science
Volume 6, Issue 2, pages 161–168, April 1995
How to Cite
Laurie, H. and Cowling, R. M. (1995), Lottery coexistence models extended to plants with disjoint generations. Journal of Vegetation Science, 6: 161–168. doi: 10.2307/3236210
- Issue published online: 24 FEB 2009
- Article first published online: 24 FEB 2009
- Received 11 January 1994; Revision received 15 July 1994; Accepted 22 July 1994.
- Population model;
Abstract. Neither conventional niche theory nor current lottery models offer a satisfactory theoretical scope for modelling coexistence of species with disjoint generations. South-African fynbos and Australian kwongan include many species which are killed by, and recruit only after, fire. We propose a density-dependent lottery model which accommodates the unusual demographics of these species. We show that coexistence requires density dependence in recruitment. The result applies to a wider class of populations than the one considered here. It is applied to non-resprouting species in fynbos and kwongan. We show that the lottery assumption of recruitment in proportion to propagules is often satisfied, while the production of such propagules is often density-dependent, and we discuss some evidence of mechanisms whereby this may occur.