Effects of repeated burning on Mediterranean communities of the northeastern Iberian Peninsula

Uppsala

2006

S. 755-764

3 Abb., 4 Tab., zahlr. Lit. Ang.

Artikel aus einer ZeitschriftUnselbständiges Werk

200143778

No statistically significant differences were found in species richness or diversity. Slopes of species-area correlations were higher in once burnt areas. In twice burnt areas, dominance by one or two species was higher. P. halepensis showed lower relative abundance and nanophanerophytes showed higher relative abundance. No differences were found for resprouter, seeder or resprouter-seeder species. Floristic composition similarity between paired areas tended to be higher in less productive sites. Fire recurrence had contrasting effects on species richness at different spatial scales. Repeated burning reduced the relative abundance of the dominant tree species, which resulted in a higher relative abundance of shrubs. It also promoted the dominance of herbs, particularly Brachypodium retusum. However, it did not change the relative abundance of regenerative groups. Paired areas were more similar as they were more Mediterranean in terms of climatic conditions.