A produção científica dos participantes do l-UM divide-se em livros, capítulos de livros, artigos em períodicos, artigos em eventos e publicações on line (web). 

Croquis de uso e cobertura da terra

(procedimentos)

D'ANTONA, Álvaro de O.; CAK, Anthony D. ; VANWEY, Leah . Collecting Sketch Maps to understand property land use and land cover in large surveys. Field Methods, v. 20, p. 66-84, 2008.

http://dx.doi.org/10.1177/1525822X07309354

 

This article describes a method to collect data on the spatial organization of land use within a rural property as part of a large-scale project examining the linkages between household demographic change and land use and land cover change in the Brazilian Amazon. Previous studies used several different spatial approaches, including maps and satellite images, to improve the information collected in standard survey questionnaires. However, few used sketch maps to obtain information from the point of view of the survey respondent about the spatial organization of land use and infrastructure. We developed a method of creating sketch maps with respondents to describe their properties. These maps then provided a spatially referenced database of the social and land use organization of the properties from the perspective of the respondent. Systematic rules allowed sketches to be used in subsequent spatial analyses in combination with satellite images and Global Positioning System reference points.

Palavras-chave: sketch maps; land use Brazilian; Amazon; GIS

 

Pobreza e desigualdade entre produtores rurais

(perspectiva multidimensional)

GUEDES, Gilvan R. ; Brondízio, Eduardo S. ; Barbieri, Alisson F. ; Anne, Resende ; Penna-Firme, Rodrigo ; D'ANTONA, ÁLVARO O. . Poverty and Inequality in the Rural Brazilian Amazon: A Multidimensional Approach. Human Ecology (New York, N.Y.), v. 40, p. 41-57, 2012.

http://dx.doi.org/10.1007/s10745-011-9444-5

 

This paper analyses poverty and inequality dynamics among smallholders along the Transamazon Highway. We measure changes in poverty and inequality for original settlers and new owners, contrasting income-based with multidimensional indices of well-being. Our results show an overall reduction in both poverty and inequality among smallholders, although poverty decline was more pronounced among new owners, while inequality reduction was larger among original settlers. This trend suggests that families have an initial improvement in livelihood and well-being which tends to reach a limit later—a sign of structural limitations common to rural areas and maybe a replication of boom and bust trends in local economies among Amazonian municipalities. In addition, our multidimensional estimates of well-being reveal that some economically viable land use strategies of smallholders (e.g., pasture) may have important ecological implications for the regional landscape. These findings highlight the public policy challenges for fostering sustainable development among rural populations.

Palavras-chave: Poverty Inequality; Brazilian Amazon Rural livelihoods; Multidimensional approach

Uso da terra e migração

(out-migration; remittances)

VANWEY, Leah K. ; GUEDES, Gilvan R. ; D'ANTONA, ÁLVARO O. Out-migration and land-use change in agricultural frontiers: insights from Altamira settlement project. Population and Environment, v. 34, p. 44-68, 2012.

http://dx.doi.org/10.1007/s11111-011-0161-1

 

One of Daniel Hogan’s lasting impacts on international demography community comes through his advocacy for studying bidirectional relationships between environment and demography, particularly migration. We build on his holistic approach to mobility and examine dynamic changes in land use and migration among small farm families in Altamira, Pará, Brazil. We find that prior area in either pasture or perennials promotes out-migration of adult children, but that out-migration is not directly associated with land-use change. In contrast to early formulations of household life cycle models that argued that aging parents would decrease productive land use as children left the farm, we find no effect of out-migration of adult children on land-use change. Instead, remittances facilitate increases in area in perennials, a slower to pay off investment that requires scarce capital, but in pasture. While remittances are rare, they appear to permit sound investments in the rural milieu and thus to slow rural exodus and the potential consolidation of land into large holdings. We would do well to promote the conditions that allow them to be sent and to be used productively to keep families on the land to avoid the specter of extensive deforestation for pasture followed by land consolidation.

Palavras-chave: Migration; Remittances; Brazilian Amazon; Credit constraint; Agricultural investment; Land use; LUCC

 

Métodos de desagregação de dados

(uma avaliação)

BUENO, Maria do Carmo Dias ; D'ANTONA, Álvaro de O. Avaliação de métodos de desagregação para geração de grades de população. Revista Espinhaço, v. 3, p. 127-137, 2014. 

http://oaji.net/articles/2015/2253-1440178949.pdf

O objetivo deste trabalho é avaliar métodos de desagregação de dados para gerar grades de população, utilizando como referência uma grade gerada através da agregação de microdados censitários, o que permite obter resultados mais precisos acerca do desempenho desses métodos. Para realizar a avaliação foram selecionadas três metodologias. A primeira utiliza uma matriz contendo os erros e acertos na identificação de áreas povoadas e não povoadas, permitindo avaliar a acurácia da distribuição espacial da população. A segunda utiliza uma regressão linear cujos coeficientes permitem avaliar a qualidade da adequação aos dados de referência. Finalmente, utilizamos uma fórmula para calcular a diferença entre os valores de população, indicando se há uma subestimação ou superestimação. Os resultados sugerem que a escolha da metodologia mais adequada depende dos objetivos a que se destina a grade de população, bem como da disponibilidade e qualidade dos dados auxiliares, além das características da área de estudo.

Palavras-chave: distribuição da população; grades de população; agregação; desagregação.

 

Mapa Interativo do Mosaico de Áreas Protegidas do baixo rio Negro (MBRN)