Unraveling the relative importance of factors driving post-fire regeneration trajectories in non-serotinous Pinus nigra forests
MetadataShow full item record
In the Mediterranean, non-serotinous pinewoods are suffering an increasing occurrence of high-severity crown fires that usually drive vegetation shifts to fire-adapted communities and a decrease in pine-dominated area. Here we used a case-study approach on a large area dominated by Pinus nigra Arn.
ssp. salzmannii burned in 1998 to gain further understanding of the relative importance of different factors related to local topography (elevation, aspect, slope, curvature), pre-fire vegetation (land-use history, canopy cover) and fire behavior (burn severity, presence of unburned patches) as drivers of post-fire regeneration dynamics. The results find that pine shows locally resilient responses driven mainly by factors related to fire effects (presence of unburned patches) and the characteristics of the pre-fire vegetation (i.e. stable forest areas). When fire-induced changes from pine dominance to other types of vegetation occurred, landscape 15 years post-fire was dominated by woody vegetation, with some rare grassland communities emerging under very specific conditions (mountain ridges, hilltops and rocky sites). Conversion from forest to shrubland occurred mainly in the most xeric sites (south-facing areas, in some cases with steep slopes) and areas dominated by young pine stands prior to the fire. We found manageable factors such as the pre-fire structure and composition of the vegetation strongly determine the occurrence of post-fire regeneration trajectories dominated by tree species regeneration. This knowledge can be used to define preventive management strategies oriented to direct regeneration dynamics in anticipation of fire occurrence. At landscape level, managing forest fuels to favor the occurrence of unburned patches and modify their spatial distribution along the burned landscape will favor a more resilient pine response. At stand level, adjusting silvicultural interventions to favor the natural establishment of late-successional tree species will favor post-fire oak regeneration.
Is part ofForest Ecology and Management, 2016, vol. 361, p. 13-22
European research projects
Showing items related by title, author, creator and subject.
Combining aerial LiDAR and multispectral imagery to assess postfire regeneration types in a Mediterranean forest Martín Alcón, Santiago; Coll Mir, Lluís; De Cáceres, Miquel; Guitart i Xarpell, Lídia; Cabré, Mariló; Just, Ariadna; González-Olabarria, José Ramón (NRC Research Press (Canadian Science Publishing), 2015-02-26)Wildfires play a major role in driving vegetation changes and can cause important environmental and economic losses in Mediterranean forests, especially where the dominant species lacks efficient postfire regeneration ...
A broad-scale analysis of the main factors determining the current structure and understory composition of Catalonian sub-alpine (Pinus uncinata Ram.) forests Martín Alcón, Santiago; Coll Mir, Lluís; Aunós Gómez, Álvaro (Oxford University Press, 2011-12-13)A broad-scale analysis of the structure and understory composition of Pyrenean mountain pine (Pinus uncinata Ram.) stands was performed using data from the Spanish National Forest Inventory. Twelve structure-based forest ...
Crown bulk density and fuel moisture dynamics in Pinus pinaster stands are neither modified by thinning nor captured by the Forest Fire Weather Index Soler Martin, Marc; Bonet Lledos, José Antonio; Martínez de Aragón, Juan; Voltas Velasco, Jordi; Coll Mir, Lluís; Resco de Dios, Víctor (Springer Nature, 2017-06-28)Key message. No temporal change was recorded during summer in fuel availability in Pinus pinaster stands, contrary to predictions from the Forest Fire Weather Index. Also, thinning had no mid-term effect on fuel moisture ...