Data/hora: 14/06/2024 01:04:32

Biblioteca(s): | Embrapa Territorial.
Data corrente: | 10/03/2010
Data da última atualização: | 31/07/2015
Autoria: | BATISTELLA, M.; VALLADARES, G. S.
Afiliação: | MATEUS BATISTELLA, CNPM; GUSTAVO SOUZA VALLADARES, UFC.
Título: | Farming expansion and land degradation in Western Bahia, Brazil.
Ano de publicação: | 2009
Fonte/Imprenta: | Biotaneotropica, São Paulo, v. 9, n. 3, p. 61-76, 2009.
DOI: | http://dx.doi.org/10.1590/S1676-06032009000300005
Idioma: | Português
Conteúdo: | Land degradation by soil erosion has called attention in tropical developing countries, particularly when natural vegetation is converted to farmland. Thus, the occupation of Brazilian savannas in Western Bahia is a matter of growing environmental concern. There are approximately 10 million hectares affected by this relatively recent land-use dynamics, but little is known about the temporal and spatial distribution of the process. To better understand such transformations, this paper addresses three related topics: land use/land cover (LULC) in 1985 and 2000; LULC dynamics between 1985 and 2000; and risk of land degradation by soil erosion as a function of farming expansion. The study area is located in Northeastern Brazil, between the coordinates 11° S and 46° 30’ W and 14° S and 43° 30’ W. All classes of natural vegetation cover decreased their areas during the period of study. Savanna (cerrado) lost 21.0% of its original area. Modern farming and irrigated areas increased 154.4 and 526.0%, respectively. Farming expansion reached 1,675,233 ha. Moderate risk of land degradation by soil erosion increased from 28.0 to 36.8% of the landscape mosaic between 1985 and 2000. The spatial and temporal dynamics observed reproduces development and land degradation examples of other savanna lands in Brazil. The integrity of native vegetation cover and the dissemination of soil and water conservation practices should be considered. This research contributes with an understanding of landscape transformations as a baseline for strategic environmental and land-use planning within the region.
Palavras-Chave: | Bahia; Uso e cobertura da terra.
Thesagro: | Cerrado; Erosão do Solo.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/108414/1/2677.pdf
Registro original: | Embrapa Territorial (CNPM)
Exemplares: | CNPM - (2677-1) - UPC - AP - DD - 09/065 - AP - 2009.065 - DIS