Does diversity beget diversity? A case study of crops and weeds
Article first published online: 24 FEB 2009
1997 IAVS - the International Association of Vegetation Science
Journal of Vegetation Science
Volume 8, Issue 2, pages 235–240, April 1997
How to Cite
Palmer, M. W. and Maurer, T. A. (1997), Does diversity beget diversity? A case study of crops and weeds. Journal of Vegetation Science, 8: 235–240. doi: 10.2307/3237352
- Issue published online: 24 FEB 2009
- Article first published online: 24 FEB 2009
- Received 15 April 1996; Revision received 25 July 1996; Accepted 26 July 1996.
- Habitat heterogeneity;
- Niche limitation;
- Species richness
- Kartesz (1994)
Abstract. The ecological literature is ambiguous as to whether the initial diversity of a plant community facilitates or deters the diversity of colonizing species. We experimentally planted annual crop species in monoculture and polyculture, and examined the resulting weed communities. The species composition of weeds was similar among treatments, but the species richness of weeds was significantly higher in the polycultures than in the monocultures. This supports the ‘diversity begets diversity’ hypothesis. Environmental microheterogeneity, diversity promoters, and ecological equivalency do not seem able to explain the observed patterns.