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| Registros recuperados : 61 | |
| Registros recuperados : 61 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
27/11/2018 |
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Data da última atualização: |
29/11/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
MIRANAD, R. de Q.; GALVÍNCIO, J. D.; MORAIS, Y. C. B.; MOURA, M. S. B. de; JONES, C. A.; SRINIVASAN, R. |
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Afiliação: |
RODRIGO DE QUEIROGA MIRANDA; JOSICLÊDA DOMICIANO GALVÍNCIO; YGOR CRISTIANO BRITO MORAIS; MAGNA SOELMA BESERRA DE MOURA, CPATSA; CHARLES ALLAN JONES; RAGHAVAN SRINIVASAN. |
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Título: |
Dry forest deforestation dynamics in Brazil's Pontal basin. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Revista Caatinga, v. 31, n. 2, p. 385-395, abr./jun. 2018. |
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ISSN: |
1983-2125 |
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DOI: |
10.1590/1983-21252018v31n215rc |
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Idioma: |
Inglês |
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Conteúdo: |
Reliable information on vegetation cover and its dynamics over time is essential for managing life, resources, and supporting policies. Although many related initiatives have been undertaken in Brazil since the 1980s, knowledge about its dry forests is still limited. In this study, we address the drivers of deforestation and their threat to the Brazilian dry forest called Caatinga. We evaluated the land cover dynamics and landscape metrics in the watershed of the Pontal River, as it has become one of the most socially and environmentally important areas in Brazil. The overall process consists of a systematic sampling grid of hydrological samples, where Landsat images (1975 to 2013) combined with the FRAGSTATS package were used to evaluate landscape metrics indices for the Caatinga. Data showed that the relative area (RA) decreased from 90.25% to 60.98% over the 38-year period, while fragmentation (PD) presented an increasing bias. In addition, the spatial distribution of both indices became more heterogeneous and clustered in the north. We suggest that appropriateness of land for farming was the leading cause of deforestation; rainfall is 112% more intense in the north of the watershed than in the south. Therefore, the northern fauna and flora have been significantly altered and reduced. The relationship between deforestation and time shows an increasing threat. Further studies evaluating these causes are needed to improve our understanding of the vegetation dynamics in this region. MenosReliable information on vegetation cover and its dynamics over time is essential for managing life, resources, and supporting policies. Although many related initiatives have been undertaken in Brazil since the 1980s, knowledge about its dry forests is still limited. In this study, we address the drivers of deforestation and their threat to the Brazilian dry forest called Caatinga. We evaluated the land cover dynamics and landscape metrics in the watershed of the Pontal River, as it has become one of the most socially and environmentally important areas in Brazil. The overall process consists of a systematic sampling grid of hydrological samples, where Landsat images (1975 to 2013) combined with the FRAGSTATS package were used to evaluate landscape metrics indices for the Caatinga. Data showed that the relative area (RA) decreased from 90.25% to 60.98% over the 38-year period, while fragmentation (PD) presented an increasing bias. In addition, the spatial distribution of both indices became more heterogeneous and clustered in the north. We suggest that appropriateness of land for farming was the leading cause of deforestation; rainfall is 112% more intense in the north of the watershed than in the south. Therefore, the northern fauna and flora have been significantly altered and reduced. The relationship between deforestation and time shows an increasing threat. Further studies evaluating these causes are needed to improve our understanding of the vegetation dynamics in this... Mostrar Tudo |
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Palavras-Chave: |
Bacia do rio Pontal; Fragmentação; Semiárido. |
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Thesagro: |
Caatinga; Cobertura Vegetal; Desmatamento; Floresta; Sensoriamento Remoto; Vegetação. |
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Thesaurus NAL: |
Landscapes; Remote sensing. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/187115/1/Magna-1.pdf
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Marc: |
LEADER 02445naa a2200337 a 4500
001 2100155
005 2018-11-29
008 2018 bl uuuu u00u1 u #d
022 $a1983-2125
024 7 $a10.1590/1983-21252018v31n215rc$2DOI
100 1 $aMIRANAD, R. de Q.
245 $aDry forest deforestation dynamics in Brazil's Pontal basin.$h[electronic resource]
260 $c2018
520 $aReliable information on vegetation cover and its dynamics over time is essential for managing life, resources, and supporting policies. Although many related initiatives have been undertaken in Brazil since the 1980s, knowledge about its dry forests is still limited. In this study, we address the drivers of deforestation and their threat to the Brazilian dry forest called Caatinga. We evaluated the land cover dynamics and landscape metrics in the watershed of the Pontal River, as it has become one of the most socially and environmentally important areas in Brazil. The overall process consists of a systematic sampling grid of hydrological samples, where Landsat images (1975 to 2013) combined with the FRAGSTATS package were used to evaluate landscape metrics indices for the Caatinga. Data showed that the relative area (RA) decreased from 90.25% to 60.98% over the 38-year period, while fragmentation (PD) presented an increasing bias. In addition, the spatial distribution of both indices became more heterogeneous and clustered in the north. We suggest that appropriateness of land for farming was the leading cause of deforestation; rainfall is 112% more intense in the north of the watershed than in the south. Therefore, the northern fauna and flora have been significantly altered and reduced. The relationship between deforestation and time shows an increasing threat. Further studies evaluating these causes are needed to improve our understanding of the vegetation dynamics in this region.
650 $aLandscapes
650 $aRemote sensing
650 $aCaatinga
650 $aCobertura Vegetal
650 $aDesmatamento
650 $aFloresta
650 $aSensoriamento Remoto
650 $aVegetação
653 $aBacia do rio Pontal
653 $aFragmentação
653 $aSemiárido
700 1 $aGALVÍNCIO, J. D.
700 1 $aMORAIS, Y. C. B.
700 1 $aMOURA, M. S. B. de
700 1 $aJONES, C. A.
700 1 $aSRINIVASAN, R.
773 $tRevista Caatinga$gv. 31, n. 2, p. 385-395, abr./jun. 2018.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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