Abstract
The main pioneer frontier considered by geographers is the Amazonian pioneer frontier. The occupation of the Brazilian territory has been carried out through successive economic cycles. Currently, the expansion of soybean crops in Amazonia is considered as the last economic cycle involving new migrations to still unexplored areas. Mapping this frontier is necessary in order to better understand its drivers and think about efficient land use policies to struggle its progress. In this paper, we propose an innovative methodology for mapping the agricultural frontier in the Amazonian state of Mato Grosso (Brazil) using satellite data acquired during the 2000–2006 period. We assume that the frontier evolves through successive land-use stages such as wildlands, non-croplands, extensive croplands and intensive croplands areas. The transitions between two stages can then be monitored through land-use change analysis. A particular emphasis is given on three land-use transitions named “deforestation”, “economic” and “intensification sub-frontiers”. In order to adapt this model for the use of remote sensing data, we defined (1) a relevant spatial scale corresponding to an agrarian locality, (2) relevant indices to qualify the land-use types and (3) rules applied on land-use types to define the frontier’s location. Our results highlight the dynamic of the agricultural frontier towards northern areas. We identified four main agricultural regions with different levels of agricultural intensification. We finally discuss these results with respect to governmental policies and economics for a better understanding of the frontier’s dynamic.
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Notes
Unfortunately, although the PRODES deforestation maps are annually updated and freely released to the scientific community, we did not get access to the SEMA deforestation maps produced after 2006. As a consequence, we could not update our study.
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Acknowledgments
The authors wish to thank the French Ministry for Research and Higher Education, which funded a PhD fellowship, the Agence Nationale de la Recherche (DURAMAZ-ANR-06-BLAN-0176), the CNPq-Conselho Nacional de Desenvolvimento Científico e Tecnológico-National Council of Technological and Scientific Development (CNPq CT-Agro grant N. 520268/2005-9), the Institut National de Recherche en Informatique et en Automatique (INRIA) (ENVIAIR grant CNPq/INRIA 490089/2005-4), the Inter-American Institute for Global Change Research (grant CRN II 2031), the US National Science Foundation (Grant GEO-0452325) and the International Development Research Centre (IDRC) (grant # 104358).
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Arvor, D., Dubreuil, V., Simões, M. et al. Mapping and spatial analysis of the soybean agricultural frontier in Mato Grosso, Brazil, using remote sensing data. GeoJournal 78, 833–850 (2013). https://doi.org/10.1007/s10708-012-9469-3
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DOI: https://doi.org/10.1007/s10708-012-9469-3