Landscape structural features control fire size in a Mediterranean forested area of central Spain
Olga Viedma A , D. G. Angeler A and José M. Moreno A BA Department of Environmental Sciences, Universidad de Castilla-La Mancha, Avenida Carlos III, s/n, E-45071 Toledo, Spain.
B Corresponding author. Email: josem.moreno@uclm.es
International Journal of Wildland Fire 18(5) 575-583 https://doi.org/10.1071/WF08030
Submitted: 19 February 2008 Accepted: 12 September 2008 Published: 10 August 2009
Abstract
Landscape structure may affect fire propagation and fire size. Propagation may be favoured in landscapes that are homogeneous and hindered at places of greater heterogeneity, and where discontinuities occur. We tested whether there is continuity in landscape structure across the edges of 110 fires in the Sierra de Gredos (central Spain). We used Landsat Multispectral Scanner images to map and assess the land-cover composition and other features of fires. Landscape diversity along the pixel row of the fire edge and of the two adjacent ones (burned and unburned) was compared for all fires. Additionally, changes in landscape properties and fuel hazard perpendicular to the fire edge evaluated the degree of discontinuity from inside the burn towards the outside across the edge. Fire size was related to landscape properties and weather conditions using generalized linear regression models. Diversity increased from inside the burn towards the edge and outside the burn. Discontinuity in land-cover types and fuel hazard increased from the inside towards the outside. Modelling confirmed that fire size was in part related to landscape characteristics of the burned area and of the edges of the fire perimeter. We conclude that landscape structure was important in determining fire size in this area.
Additional keywords: fuel discontinuity, fuel diversity, GLM, global change, land-use/land-cover change, topographic complexity.
Acknowledgements
Funding was provided by the European Commission (contract EV96–0320, project LUCIFER, and contract EVG1-CT-2001–00043, project SPREAD to J. M. Moreno).
Agee JK, Bahro B, Finney MA, Omi PN, Sapsis DB, Skinner CN, van Wagtendonk JW , Weatherspoon CP (2000) The use of shaded fuel-breaks in landscape fire management. Forest Ecology and Management 127, 55–66.
| Crossref | GoogleScholarGoogle Scholar |
Duncan BW , Schmalzer PA (2004) Anthropogenic influences on potential fire spread in a pyrogenic ecosystem of Florida, USA. Landscape Ecology 19, 153–165.
| Crossref | GoogleScholarGoogle Scholar |
Guyette RP, Muzika RM , Dey DC (2002) Dynamics of an anthropogenic fire regime. Ecosystems 5, 472–486.
Moritz MA, Keeley JE, Johnson EA , Schaffner AA (2004) Testing a basic assumption of shrubland fire management: how important is fuel age? Frontiers in Ecology and the Environment 2, 67–72.
Romme WH , Knight DH (1981) Fire frequency and subalpine forest succession along a topographic gradient in Wyoming. Ecology 62, 319–326.
| Crossref | GoogleScholarGoogle Scholar |
Seydack AHW, Bekker SJ , Marshall AH (2007) Shrubland fire regime scenarios in the Swartberg Mountain Range, South Africa: implications for fire management. International Journal of Wildland Fire 16, 81–95.
| Crossref | GoogleScholarGoogle Scholar |
Stephens SL (1998) Evaluation of the effects of silvicultural and fuels treatments on potential fire behaviour in Sierra Nevada mixed-conifer forests. Forest Ecology and Management 105, 21–35.
| Crossref | GoogleScholarGoogle Scholar |
Vázquez A , Moreno JM (1993) Sensitivity of fire occurrence to meteorological variables in Mediterranean and Atlantic areas of Spain. Landscape and Urban Planning 24, 129–142.
| Crossref | GoogleScholarGoogle Scholar |
Vázquez A , Moreno JM (2001) Spatial distribution of forest fires in Sierra de Gredos (central Spain). Forest Ecology and Management 147, 55–65.
| Crossref | GoogleScholarGoogle Scholar |
Viedma O, Moreno JM , Rieiro I (2006) Interactions between land use/land cover change, forest fires and landscape structure in Sierra de Gredos (central Spain). Environmental Conservation 33, 212–222.
| Crossref | GoogleScholarGoogle Scholar |
