Fire, rain and the selection of seeder and resprouter life-histories in fire-recruiting, woody plants

New Phytol. 2005 Oct;168(1):155-65. doi: 10.1111/j.1469-8137.2005.01486.x.

Abstract

Several Cape species of the genus Erica are known to present seeder and resprouter phenotypes, and this variation seems to have a genetic basis. Therefore, this genus provides ideal model systems for using to elucidate the evolution of nonsprouting or seeder and resprouter life-histories in woody, fire-recruiting plants. A simple simulation model was developed to identify, under life-history optimality, the ecological conditions (viz. rainfall conditions and fire frequency) that conferred a selective advantage to the seeder phenotype over the resprouter in a given Cape Erica species. The model illustrated that the seeder life-history was able to invade and replace a resprouter population only under a mild mediterranean climate, with short, moderate summer droughts. This simulation approach will contribute to a better understanding of the biogeographical pattern of seeder and resprouter lineages of one of the paradigmatic fynbos woody taxa throughout the Cape floristic region.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biological Evolution
  • Computer Simulation
  • Ecosystem
  • Ericaceae / growth & development
  • Ericaceae / physiology
  • Fires*
  • Models, Biological
  • Plant Development*
  • Rain*
  • South Africa
  • Time Factors