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Changes in population and land use over time in the Ecuadorian Amazon Acta Amazonica
Bilsborrow,Richard E.; Barbieri,Alisson F.; Pan,William.
This paper draws upon a detailed longitudinal survey of households living on agricultural plots in the northern three provinces of the Ecuadorian Amazon, the principal region of colonization by migrants in Ecuador since the 1970s. Following the discovery of petroleum in 1967 near what has subsequently come to be the provincial capital and largest Amazonian city of Lago Agrio, oil companies built roads to lay pipelines to extract and pump oil across the Andes for export. As a result, for the past 30 years over half of both Ecuador's export earnings and government revenues have come from petroleum extracted from this region. But the roads also facilitated massive spontaneous in-migration of families from origin areas in the Ecuadorian Sierra, characterized...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecuadorian Amazon; Agricultural colonization; Population change; Land use change; Migration.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672004000400015
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Evaluation of geostatistical techniques to estimate the spatial distribution of aboveground biomass in the Amazon rainforest using high-resolution remote sensing data Acta Amazonica
BENÍTEZ,Fátima L.; ANDERSON,Liana O.; FORMAGGIO,Antônio R..
ABSTRACT The spatial distribution of forest biomass in the Amazon is heterogeneous with a temporal and spatial variation, especially in relation to the different vegetation types of this biome. Biomass estimated in this region varies significantly depending on the applied approach and the data set used for modeling it. In this context, this study aimed to evaluate three different geostatistical techniques to estimate the spatial distribution of aboveground biomass (AGB). The selected techniques were: 1) ordinary least-squares regression (OLS), 2) geographically weighted regression (GWR) and, 3) geographically weighted regression - kriging (GWR-K). These techniques were applied to the same field dataset, using the same environmental variables derived from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Geographically Weighted Regression; Geographically Weighted Regression-Kriging; RedEdge; Carbon emissions; Ecuadorian Amazon.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000200151
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