Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.jaridenv.2010.05.006
Title (Primary) Resource partitioning and interactions enable coexistence in a grass-shrub steppe
Author Cipriotti, P.A.; Aguiar, M.R.
Journal Journal of Arid Environments
Year 2010
Department OESA
Volume 74
Issue 10
Page From 1111
Page To 1120
Language englisch
Keywords Biotic interactions; Competition; Facilitation; Neighbourhood analyses; Niche separation; Patagonian steppes; Removal experiments; Spatial pattern analyses; Walter hypothesis
Abstract We revisited a growth-form removal experiment after 12 years with the aim to compare the long-term population responses of three shrub species. Specifically, we were interested to know if the resource partitioning and plant interactions act as complementary mechanisms of the shrub-grass coexistence. In 1983 different plots from grass-shrub Patagonian steppes were submitted to three treatments: control, grass-, and shrub-removal during three consecutive years. In 1997 we studied nine plots from the original experiment and recorded all shrubs to compare shrub density, population size structure, vitality, spatial patterns and neighbourhood interferences of three native and co-dominant shrub species: Mulinum spinosum, Senecio filaginoides, and Adesmia volckmanni. After 12 years of recovery, shrubs as a growth-form group, fully re-established in plots where they were removed and attained 75% higher density in grass-removal plots than in control plots. However, long-term population responses of Mulinum, Senecio, and Adesmia to removals were distinctive. On the other hand, negative and positive interferences among shrub species and between shrubs and grasses generated a complex network. Morphological and functional differences in shrub and grass species and their interactions at population level and long-term could be a key to achieve a better comprehension of shrub-grass coexistence from semi-arid ecosystems.
Persistent UFZ Identifier
Cipriotti, P.A., Aguiar, M.R. (2010):
Resource partitioning and interactions enable coexistence in a grass-shrub steppe
J. Arid. Environ. 74 (10), 1111 - 1120