Proportion of Anthromes showing negative and positive relationship.

<p>Pie-charts showing the relative proportion of the total area showing (A) positive and (B) negative significant relationships between burned area and population density, classified according to the six major anthrome types defined by Ellis and Ramankutty (2008).</p

Output parameters and local R².

<p>The upper panel (A) shows results from the GWR analysis, showing the nature of the relationship between population density and burned area for those regions where the relationship is significant at the 95% level (red shows a positive relationship, blue shows a negative relationship). The slope coefficient classes are defined separately for each continent; (B) Mapped patterns in the sign and magnitude of the statistically significant intercept values from the GWR analysis of population density and burned area. Dark grey shows positive intercept values, where the area burned is large even at negligible population density (i.e. where the landscape is naturally fire-prone), while light grey shows negative intercept values where climatic or vegetation factors do not favour fire; (C) Showing the significant patterns for both intercept and slopes according to the sign of the relationship, thus the four combinations show both out being positive (red), positive slopes and negative intercept (green), negative slopes and positive intercept (yellow) and both being negative (blue) ;(D) Mapped patterns of the local R² for the regions where the relationship between population density and burned area is statistically significant.</p

The relationship between burned area and population density at different levels of burned area (50 and 90%) for the 4 case studies.

<p>(A) Case 1 in North America. (B) Case 2 in South America. (C) Case 3 in Africa. (D) Case 4 in Asia.</p

Input data sets.

<p>Average mean annual burned area (showed in cell area fraction instead of km² in order to help the interpretation), based on data from the Global Fire Emissions Database version 3 (GFED3: Giglio et al., 2010) for the period 1997-2009; (B) Population density (persons per square kilometre: p/km²) from the Gridded Population of the World version 3 (Ciesin, 2005); and (C) The anthropogenic biomes (anthromes) of the world, mapped as the six major anthrome types (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0081188#pone-0081188-t001" target="_blank">Table 1</a>) defined by Ellis and Ramankutty (2008).</p