Human and biophysical drivers of fires in Semiarid Chaco mountains of Central Argentina

The Science of the Total Environment
Juan P ArgañarazLaura M Bellis

Abstract

Fires are a recurrent disturbance in Semiarid Chaco mountains of central Argentina. The interaction of multiple factors generates variable patterns of fire occurrence in space and time. Understanding the dominant fire drivers at different spatial scales is a fundamental goal to minimize the negative impacts of fires. Our aim was to identify the biophysical and human drivers of fires in the Semiarid Chaco mountains of Central Argentina and their individual effects on fire activity, in order to determine the thresholds and/or ranges of the drivers at which fire occurrence is favored or disfavored. We used fire frequency as the response variable and a set of 28 potential predictor variables, which included climatic, human, topographic, biological and hydrological factors. Data were analyzed using Boosted Regression Trees, using data from near 10,500 sampling points. Our model identified the fire drivers accurately (75.6% of deviance explained). Although humans are responsible for most ignitions, climatic variables, such as annual precipitation, annual potential evapotranspiration and temperature seasonality were the most important determiners of fire frequency, followed by human (population density and distance to waste disposals)...Continue Reading

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Citations

Apr 26, 2016·The Science of the Total Environment·Fernando Coelho EugenioLima Deleon Martins
Dec 3, 2016·Ecological Applications : a Publication of the Ecological Society of America·Emily J FuscoBethany A Bradley
Nov 5, 2020·Anais Da Academia Brasileira De Ciências·Gretel N RodrÍguez GarayErica E Scheibler
Aug 26, 2021·Anais Da Academia Brasileira De Ciências·Ronie S JuvanholAntônio Carlos Ferraz Filho

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