Abstract
Wildfires are an integral part of Mediterranean ecosystems; humans impact on landscapes imply changes in fuel amount and continuity, and thus in fire regime. We tested the hypothesis that fire regime changed in western Mediterranean Basin during the last century using time series techniques. We first compiled a 130-year fire history for the Valencia province (Spain, Eastern Iberian Peninsula, Western Mediterranean Basin) from contemporary statistics plus old forest administration dossiers and newspapers. We also compiled census on rural population and climatic data for the same period in order to evaluate the role of climate and human-driven fuel changes on the fire regime change. The result suggested that there was a major fire regime shift around the early 1970s in such a way that fires increased in annual frequency (doubled) and area burned (by about an order of magnitude). The main driver of this shift was the increase in fuel amount and continuity due to rural depopulation (vegetation and fuel build-up after farm abandonment) suggesting that fires were fuel-limited during the pre-1970s period. Climatic conditions were poorly related to pre-1970s fires and strongly related to post-1970s fires, suggesting that fire are currently less fuel limited and more drought-driven than before the 1970s. Thus, the fire regime shift implies also a shift in the main driver for fire activity, and this has consequences in the global change agenda.
Similar content being viewed by others
References
Andersen T, Carstensen J, Hernández-García E, Duarte CM (2009) Ecological thresholds and regime shifts: approaches to identification. Trends Ecol Evol 24(1):49–57
Baeza J, Santana VM, Pausas JG, Vallejo R (2011) Successional trends in standing dead biomass in Mediterranean Basin species Sci. J Veg Sci. doi:10.1111/j.1654-1103.2011.01262.x
Bonet A, Pausas JG (2007) Old field dynamics on the dry side of the Mediterranean Basin: patterns and processes in semiarid SE Spain. In: Cramer VA, Hobbs RJ (eds) Old fields: dynamics and restoration of abandoned farmland. Island, Washington, DC, pp 247–264
Brock W, Carpenter S (2010) Interacting regime shifts in ecosystems: implication for early warnings. Ecol Monogr 80:353–367. doi:10.1890/09-1824
Brown RL, Durbin J, Evans JM (1975) Techniques for testing the constancy of regression relationships over time (with discussion). J R Stat Soc 37:149–192
Brown TJ, Hall BL, Westerling AL (2004) The impact of twenty-first century climate change on wildland fire danger in the Western United States: an applications perspective. Clim Change 62(1):365–388
Covington WW, Moore MM (1994) Southwestern ponderosa forest structure: changes since Euro-American settlement. J For 92(1):39–47
Delcourt HR, Delcourt PA (1997) Pre-Columbian Native American use of fire on southern Appalachian landscapes. Conserv Biol 11(4):1010–1014
Esteban-Parra MJ, Pozo-Vázquez D, Rodrigo FS, Castro-Díez Y (2003) Temperature and precipitation variability and trends in northern Spain in the context of the Iberian peninsula climate. In: Bolle HJ (ed) Mediterranean climate: variability and trends. Springer, Berlin, pp 259–276
Fernández-Muñoz S (1999) Cambio y continuidad en los incendios forestales: estudio de casos en las provincias de Soria y Valencia. In: Aranque E (ed) Incendios históricos. Una aproximación multidisciplinar. Universidad Internacional de Andalucía, pp 111–148
Fulé PZ, Ribas M, Gutiérrez E, Vallejo R, Kaye MW (2008) Forest structure and fire history in an old Pinus nigra forest, eastern spain. For Ecol Manag 255(3–4):1234–1242
Guyette RP, Muzika RM, Dey DC (2002) Dynamics of an anthropogenic fire regime. Ecosystems 5(5):472–486
Keeley JE (2002) Native American impacts on fire regimes of the California coastal ranges. J Biogeogr 29:303–320
Keeley JE, Fotheringham CJ (2001) Historic fire regime in southern California shrublands. Conserv Biol 15(6):1536–1548
Keeley JE, Zedler PH (2009) Large, high intensity fire events in southern California shrublands: debunking the fine-grained age-patch model. Ecol Appl 19:69–94
Keeley JE, Fotheringham CJ, Morais M (1999) Reexamining fire suppression impacts on brushland fire regimes. Science 284(5421):1829–1832
Lebourgeois F, Granier A, Breda N (2001) Une analyse des changements climatiques régionaux en france entre 1956 et 1997. Réflexions en terme de conséquences pour les écosystems forestiers. Ann For Sci 58(7):733–754
MacNeill IB (1974) Tests for change of parameter at unknown times and distributions of some related functionals on Brownian motion. Ann Stat 2(5):950–962
Marlon JR, Bartlein PJ, Carcaillet C, Gavin DG, Harrison SP, Higuera PE, Joos F, Power MJ, Prentice IC (2008) Climate and human influences on global biomass burning over the past two millennia. Nature Geoscience 1(10):697–702
Millán MM, Estrela MJ, Sanz MJ, Mantilla E, Martín M, Pastor F, Salvador R, Vallejo R, Alonso L, Gangoiti G (2005) Climatic feedbacks and desertification: the Mediterranean model. J Clim 18(5):684–701
Moritz MA (2003) Spatiotemporal analysis of controls on shrubland fire regimes: age dependency and fire hazard. Ecology 84(2):351–361
Ovaskainen O, Hanski I (2001) Spatially structured metapopulation models: global and local assessment of metapopulation capacity. Theor Popul Biol 60:281–302
Pausas JG (2004) Changes in fire and climate in the eastern Iberian peninsula (Mediterranean Basin). Clim Change 63(3):337–350
Pausas JG, Keeley JE (2009) A burning story: the role of fire in the history of life. Bioscience 59(7):593–601. doi:10.1525/bio.2009.59.7.10
Pausas JG, Llovet J, Rodrigo A, Vallejo R (2008) Are wildfires a disaster in the Mediterranean Basin?—a review. Int J Wildland Fire 17(6):713–723
Pérez Cueva AJ (1994) Atlas climàtic de la Comunitat Valenciana (1961–1990). Generalitat Valenciana, Valencia
Peters DPC, Pielke RA, Bestelmeyer BT, Allen CD, Munson-McGee S, Havstad KM (2004) Cross-scale interactions, nonlinearities, and forecasting catastrophic events. Proc Natl Acad Sci USA 101(42):15130–15135
Piñol J, Terradas J, Lloret F (1998) Climate warming, wildfire hazard, and wildfire occurrence in coastal eastern Spain. Clim Change 38:345–357
Ploberger W, Kramer W (1992) The CUSUM test with OLS residuals. Econometrica 60(2):271–285
Seijo F (2009) Who framed the forest fire? State framing and peasant counter-framing of anthropogenic forest fires in Spain since 1940. J Environ Policy Plan 11:103–128
Turner MG, Gardner RH (1991) Quantitative methods in landscape ecology. Ecological studies. Springer
With KA, Crist TO (1995) Critical thresholds in species’ responses to landscape structure. Ecology 76(8):2446–2459
Zeileis A, Leisch F, Hornik K, Kleiber C (2002) Strucchange: an R package for testing for structural change in linear regression models. J Stat Soft 7(2):1–38
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Pausas, J.G., Fernández-Muñoz, S. Fire regime changes in the Western Mediterranean Basin: from fuel-limited to drought-driven fire regime. Climatic Change 110, 215–226 (2012). https://doi.org/10.1007/s10584-011-0060-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10584-011-0060-6