Unit of Comparative Plant Ecology (NERC), Department of Animal and Plant Science, University of Sheffield, Sheffield S10 2TN, Great Britain;
Morphological analysis of herbaceous communities under different grazing regimes
Article first published online: 24 FEB 2009
1992 IAVS - the International Association of Vegetation Science
Journal of Vegetation Science
Volume 3, Issue 5, pages 689–696, October 1992
How to Cite
Díaz, S., Acosta, A. and Cabido, M. (1992), Morphological analysis of herbaceous communities under different grazing regimes. Journal of Vegetation Science, 3: 689–696. doi: 10.2307/3235837
- Issue published online: 24 FEB 2009
- Article first published online: 24 FEB 2009
- Received 2 January 1992; Revision received 2 June 1992; Accepted 9 July 1992.
- Morphological mode of response;
- Multivariate method;
- Photosynthetic structure
- Cabrera (1963;
- 1970) and Correa (1984)
Abstract. A methodology for the morphological analysis of herbaceous communities is presented, together with an example of its application in montane grasslands in the province of Córdoba (Argentina) subject to grazing and burning.
The method, based on multivariate ordination and classification techniques, enabled the detection of morphological changes at three levels in response to disturbance: (a) characterization of the spatial structure of the vegetation; (b) identification of morphological plant groups; and (c) quantification of morphological shifts among different individuals of a single species.
The architecture of the vegetation changed toward a progressive miniaturization of photosynthetic structures and concentration of biomass close to the ground, as disturbance intensity increased. Six morphological plant groups (modes of response) showing different behaviour in relation to competition for light and pressure from large herbivores were identified. Some species, highly preferred by ungulate grazers, showed high morphological variability among morphs growing in different grazing situations, whereas some others were morphologically uniform.