Dinâmica do uso e ocupação do solo em uma bacia hidrográfica do semiárido brasileiro

Coelho, Victor; Montenegro, Suzana Maria Gico Lima; Almeida, Cristiano das Neves; Lima, Eduardo Rodrigues Viana de; Neto, Alfredo Ribeiro; Moura, Glawbber S. S. de

doi:10.1590/s1415-43662014000100009

Cited by 56 publications

(51 citation statements)

References 28 publications

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“…These authors also reported that these phytophysiognomies have very similar characteristics and, on that basis, could not be separated by NDVI values (NDVI = 0.45 to 0.56). Nonetheless, for the other LUs in EEP, NDVI values are within the range determined by LIESENBERG et al (2007) and BITENCOURT et al (1997) (Table 4). Overall, the accuracy of classes followed the same pattern as the separability of them, in other words, classes with bad separability had lower Kappa index.…”

Section: Resultssupporting

confidence: 83%

“…Currently, geo-technological systems and products are indispensable tools for spatial and temporal detection, evaluation and monitoring of problems related to the environment (GÓMEZ et al, 2016;ANDREW et al, 2014;BODART et al, 2013;BODART et al, 2011). This is due to distinct data integration and overlapping at varied scales by geographic information systems (GISs), facilitating decision-making and shifts, if necessary, on land use and occupation policies (BEUCHLE et al, 2015;ten CATEN et al, 2015;MÜLLER et al, 2015;COELHO et al, 2014;GIRI et al, 2013;POTAPOV et al, 2011;DURIGAN & RATTER, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Evolution of Cerrado Vegetal Cover on a River Island Based on Orbital Imaging Data

et al. 2016

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This study aimed to assess vegetal cover evolution on a river island within the Ecological Station of (EEP), by remote sensing. For this purpose, Normalized Difference Vegetation Indexes were generated for Landsat 1 (1973( ) and Landsat 5 (1984( , 1990( , 2000 images. Five landscape units were identified in the field: bare soil, Rough savanna, Typical savanna, Forested savanna and Evergreen dry woods. Only Forested savanna and Evergreen dry woods showed poor spectral splitting, being thus considered as a forestry complex. Changes throughout time have occurred in all units, with decreasing in bare soil areas (-2.56 ha year -1 ), Rough savanna (-0.66 ha year -1 ) and Typical savanna (-0.94 ha year -1 ) and with an increase in the Forested savanna (5.97 ha year -1 ). Thus, the method used in this study was effective for sorting and assessing plant cover of the landscape units studied over time.

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Section: Resultssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Evolution of Cerrado Vegetal Cover on a River Island Based on Orbital Imaging Data

et al. 2016

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“…Land use and land cover data are essential for understanding landscape configuration and for revealing the organizational strategies and patterns of agricultural production [47,48]. TerraClass data [33] with a spatial resolution of 30 m allows for both regional level and municipal level analysis of land use and land cover dynamics.…”

Section: Terraclassmentioning

confidence: 99%

Typologies and Spatialization of Agricultural Production Systems in Rondônia, Brazil: Linking Land Use, Socioeconomics and Territorial Configuration

Almeida

Mourão

Dessay

et al. 2016

Land

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Abstract:The current Amazon landscape consists of heterogeneous mosaics formed by interactions between the original forest and productive activities. Recognizing and quantifying the characteristics of these landscapes is essential for understanding agricultural production chains, assessing the impact of policies, and in planning future actions. Our main objective was to construct the regionalization of agricultural production for Rondônia State (Brazilian Amazon) at the municipal level. We adopted a decision tree approach, using land use maps derived from remote sensing data (PRODES and TerraClass) combined with socioeconomic data. The decision trees allowed us to allocate municipalities to one of five agricultural production systems: (i) coexistence of livestock production and intensive agriculture; (ii) semi-intensive beef and milk production; (iii) semi-intensive beef production; (iv) intensive beef and milk production, and; (v) intensive beef production. These production systems are, respectively, linked to mechanized agriculture (i), traditional cattle farming with low management, with (ii) or without (iii) a significant presence of dairy farming, and to more intensive livestock farming with (iv) or without (v) a significant presence of dairy farming. The municipalities and associated production systems were then characterized using a wide variety of quantitative metrics grouped into four dimensions: (i) agricultural production; (ii) economics; (iii) territorial configuration, and; (iv) social characteristics. We found that production systems linked to mechanized agriculture predominate in the south of the state, while intensive farming is mainly found in the center of the state. Semi-intensive livestock farming is mainly located close to the southwest frontier and in the north of the state, where human occupation of the territory is not fully consolidated. This distributional pattern reflects the origins of the agricultural production system of Rondônia. Moreover, the characterization of the production systems provides insights into the pattern of occupation of the Amazon and the socioeconomic consequences of continuing agricultural expansion.

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“…In Brazil, semiarid regions are used mainly for the rainfed production of drought-tolerant forages and perennial crops; however, yields are relatively low (COELHO et al, 2014). Thus, the stabilization of farming systems and the maintenance of sustainable yields in these regions are of high importance.…”

Section: Introductionmentioning

confidence: 99%

Leguminous Cover Crops for Banana Plantations in Semi-Arid Regions

2017

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-High temperatures and low rainfall characterize the Brazilian semiarid regions. This regional climate demands the adoption of practices that increase the efficiency and sustainability of local farming. This study aimed to assess the ability of two perennial herbaceous leguminous species, calopo and tropical kudzu, to provide permanent soil cover in banana plantations in Jequitinhonha Valley, northeast Minas Gerais state, Brazil. To this end, we evaluated the differences of calopo and tropical kudzu in soil cover capacity and the amount of senescent phytomass deposited on the soil surface, nutrient content in senescent phytomass, as well as their effects on temperature and soil moisture, compared with bare soil in two experimental sites. The results showed that, compared with tropical kudzu, calopo had a higher soil cover capacity and was more effective at increasing organic material and nutrients in the soil owing to the relatively higher amount of senescent phytomass deposited on the soil surface. However, both calopo and tropical kudzu reduced soil temperature and increase soil moisture compared with bare soil. Overall, we concluded that these species can deposit high levels of senescence in the soil, providing several benefits to the cultivation system of banana plants in the semiarid regions. Keywords

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Dinâmica do uso e ocupação do solo em uma bacia hidrográfica do semiárido brasileiro

Cited by 56 publications

References 28 publications

Evolution of Cerrado Vegetal Cover on a River Island Based on Orbital Imaging Data

Evolution of Cerrado Vegetal Cover on a River Island Based on Orbital Imaging Data

Typologies and Spatialization of Agricultural Production Systems in Rondônia, Brazil: Linking Land Use, Socioeconomics and Territorial Configuration

Leguminous Cover Crops for Banana Plantations in Semi-Arid Regions

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