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Socioeconomics and fire regime in the Mediterranean

August 26th, 2017 Leave a comment Go to comments

In recent decades, fires in Mediterranean Europe have become larger and more frequent. This trend has been driven mainly by socioeconomic changes that have generated rural depopulation and changes in traditional land use. This has increased the amount and continuity of vegetation (fuel), and thus an increase in the fire size and area burnt [1-3]. In a recent paper [4] we compared fire statistics of the Western Rif (Morocco) with those form Valencia (eastern Spain) to show that current fire regimes in Mediterranean Africa resemble past fire regimes in the Mediterranean Europe when rural activities dominated the landscape. The temporal fire regime shift observed in different countries of the Mediterranean Europe (from small, fuel-limited fires to drought-driven fires) can be identified when moving from the southern to the northern rim of the Basin. That is, most spatial and temporal variability in fire regimes of the Mediterranean Basin is driven by shifts in the amounts of fuel and continuity imposed by changes in socioeconomic drivers (e.g., rural depopulation). In fact, we can use rural population density as an early warning for abrupt fire regime shift. Consequently we can predict future fire regimes in North Africa, based on the trends observed in southern Europe, and we can better understand past fire regimes in Europe based on the current situation in North Africa [4].


Figure 1. Western Rif (northern Morocco) and Valencia (eastern Spain).


Figure 2. Fire-size distribution in Valencia, for the period 1880-1970 (white boxes) and for the period 1975-2014 (grey boxes), and in the western Rif (red symbols, 2008-2015). For details see [4]

References

[1] Pausas, J.G. 2004. Changes in fire and climate in the eastern Iberian Peninsula (Mediterranean basin). Climatic Change 63: 337-350. [pdf | doi]

[2] Pausas J.G. & Fernández-Muñoz S. 2012. Fire regime changes in the Western Mediterranean Basin: from fuel-limited to drought-driven fire regime. Climatic Change 110: 215-226. [doi | springer | pdf]

[3] Pausas J.G. & Paula S. 2012. Fuel shapes the fire-climate relationship: evidence from Mediterranean ecosystems. Global Ecol. & Biogeogr. 21: 1074-1082. [doi | pdf | supp]  

[4] Chergui B., Fahd S., Santos X., Pausas J.G. 2017. Socioeconomic factors drive fire-regime variability in the Mediterranean Basin. Ecosystems [doi | pdf]

 

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