Wildfire patterns and landscape changes in Mediterranean oak woodlands

作者: J.P. Guiomar , N. , Godinho , S. , Fernandes

DOI: 10.1016/J.SCITOTENV.2015.07.087

关键词: Context (language use)VegetationMediterranean climateOak woodlandsPoison controlEcologyLand coverShrublandQuercus sppGeography

摘要: Fire is infrequent in the oak woodlands of southern Portugal (montado) but large and severe fires affected these agro-forestry systems 2003-2005. We hypothesised transition from forest to shrubland as a fire-driven process investigated links between fire incidence montado change other land cover types, particularly those related with presence pioneer communities (generically designed this context "transitions early-successional communities"). present landscape-scale framework for assessing probability communities, considering three sets explanatory variables: patterns 1990 prior changes (occurred 1960 1990), patterns, spatial factors. These factors captured 78.2% observed variability transitions vegetation. The contributions were high, respectively 60.6% 43.4%, influence former being lower (34.4%). highest amount explained variation occurrence was pure effect (19.9%). Low connectedness landscape can increase vulnerability changes, namely vegetation, mostly by characteristics Among all metrics used characterize extent, effective mesh size provided best modelling results. Transitions are more likely high values total burned area. This cross-boundary metric an indicator distribution identified and, therefore, we conclude that increases its shrubland. Language: en

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