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Monday, April 9 • 5:30pm - 7:00pm
POSTER: Effect of Landscape Transitions on Fire Frequency in the Center Zone of Chile

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AUTHORS: Mariam G. Valladares-Castellanos*, Guofan Shao, Douglass F. Jacobs – Department of Forestry and Natural Resources, Purdue University

ABSTRACT: Changes in fire regimes can be triggered by a series of factors that vary over time. Most of the changes in fire regimes are linked to landscape structural changes that are directly or indirectly related to human activities. Chile’s landscape has undergone a series of accelerated transitions throughout history. From agricultural expansion to tree plantation establishment, Chile has strongly changed its production dynamic. The changes of fire activity within the country could be related to the internal landscape dynamics. The goal of this study was to analyze the landscape transition patterns in the Center zone of Chile and the effect of those transitions on the fire frequency between 2014-2017. Landsat 8 OLI TIRS Level 1 imagery was used to derive a change detection contingency table and intensity analysis. Overall, 27.2% of the area changed between 2014-2017. The Maule region showed the most significant rate of transition between agriculture and forest/plantation area (P9.08%). Intensive transitions where forest/plantation area increased were related to decreases in agriculture areas (Uniform transition >3.95%). Increases in agricultural areas were related to a reduction in bare soil areas (Uniform transition >1.85%). Conversion from bare soil to forest/plantation area, categorized as a passive transition, significantly affected the fire frequency change. Transitions between agriculture to forest, bare soil to urban/burned and forest to urban/burned (p

Monday April 9, 2018 5:30pm - 7:00pm CDT
Monroe Room

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