Effects of grazing on soil seed bank dynamics: An approach with functional groups
Article first published online: 24 FEB 2009
2003 IAVS - the International Association of Vegetation Science
Journal of Vegetation Science
Volume 14, Issue 3, pages 375–386, June 2003
How to Cite
Sternberg, M., Gutman, M., Perevolotsky, A. and Kigel, J. (2003), Effects of grazing on soil seed bank dynamics: An approach with functional groups. Journal of Vegetation Science, 14: 375–386. doi: 10.1111/j.1654-1103.2003.tb02163.x
- Issue published online: 24 FEB 2009
- Article first published online: 24 FEB 2009
- Received 18 February 2002; Revision received 18 July 2002; Accepted 25 September 2002.
- Regeneration strategy
- Feinbrun-Dothan & Danin (1991)
Abstract. The relationship between intensity and timing of cattle grazing on changes in the size and composition of the soil seed bank were investigated in a 3-yr study in a Mediterranean grassland in northeastern Israel. Treatments included manipulations of stocking rates and of grazing regimes, in a factorial design.
The retrieved soil seed bank community was rich in species, with 133 species accounting for 80% of the 166 species recorded at the site. Within the seed bank, 89% of the species were annuals. Seed bank dynamics was analysed in terms of plant functional groups and germination strategies. In terms of total seed bank density and including all functional groups, 42% of the seeds present in the soil did not germinate under watering conditions. The dormancy level differed greatly among functional groups. The seed bank of annual legumes, crucifers, annual thistles and annual forbs had a large fraction of non-germinated seeds and characterized areas grazed early in the growing season under high and very high grazing intensity. These functional groups were considered to have a higher potential for persistent seed banks production. In contrast, short and tall annual grasses and tall perennial grasses, that were dominant in ungrazed or moderately grazed paddocks, generally had seed banks with a very small fraction of non-germinated seeds. Seed bank densities varied widely between grazing treatments and years. Under continuous grazing, heavy grazing pressure reduced seed bank densities of grasses and crucifers in comparison to moderate grazing. The greatest reduction on the seed bank densities resulted from heavy grazing concentrated during the seed-set stages.