<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santana, Victor M</style></author><author><style face="normal" font="default" size="100%">Jaime Baeza, M</style></author><author><style face="normal" font="default" size="100%">Marrs, Rob H</style></author><author><style face="normal" font="default" size="100%">Ramón Vallejo, V</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Old-field secondary succession in SE Spain: can fire divert it?</style></title><secondary-title><style face="normal" font="default" size="100%">Plant Ecology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">alternative stable state</style></keyword><keyword><style  face="normal" font="default" size="100%">Arrested succession</style></keyword><keyword><style  face="normal" font="default" size="100%">CCA</style></keyword><keyword><style  face="normal" font="default" size="100%">Fire recurrence</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean vegetation</style></keyword><keyword><style  face="normal" font="default" size="100%">Successional pathway</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><volume><style face="normal" font="default" size="100%">211</style></volume><pages><style face="normal" font="default" size="100%">337-349</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In the Mediterranean Basin, most cultivated areas were abandoned in the last century and are now in various stages of old-ﬁeld succession. The aim of this work was to analyse the successional trajectories of these ecosystems, and to assess possible deviations in these pathways due to ﬁre occurrence at high or low recurrence levels. Old-ﬁelds abandoned either about 50 or about 100 years ago were selected in SE Spain. Within the 50-year-old abandoned ﬁelds, plots were established which had been burned by 1, 2 and 3 ﬁres in the last 25 years. Cover values of vascular species were sampled and then analysed by means of multivariate analysis. Euclidean distances between resulting communities were used as an indicator of the possible deviation from the unburned successional pathway. Our results pointed to the possibility that different successional pathways may exist depending on ﬁre occurrence and recurrence. In the absence of ﬁre, the vegetation is dominated by pioneer species, mainly Pinus. With the passage of time this vegetation will become dominated by later successional tree species (Quercus). However, when early-successional communities are affected by ﬁre, the succession can be diverted. A single ﬁre is enough to change Pinusforests into alternative stable states dominated by Rosmarinus ofﬁcinalis shrub communities, where the colonisation of species in later successional stages is arrested. This deviation increases in high ﬁre recurrence regimes where the vegetation changes to dwarf shrubs and herbs.</style></abstract></record></records></xml>