Savannas
Mostrando 1-12 de 105 artigos, teses e dissertações.
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1. Effect of fire under the soils on the organization of communities of three remnants of Amazonian savannas
ABSTRACT Areas of cerrado (Brazilian savanna) in the Amazon have been poorly studied from the perspective of fire impacts on environmental sustainability, especially with regard to disturbances to soil and vegetation structure. This study aimed to analyze the influence of edaphic variables and fire together on the composition and structure of tree and shrub
Acta Bot. Bras.. Publicado em: 2020-09
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2. Fire cues and germination of invasive and native grasses in the Cerrado
ABSTRACT Fire-related cues may enhance seed recruitment in flammable ecosystems and differences in fire-germination responses of invasive vs. native species can drive the invasion process. We evaluated the effects of heat shock and smoke water solution treatment on seed germination of invasive (Melinis minutiflora, Urochloa decumbens, U. brizantha) and nativ
Acta Bot. Bras.. Publicado em: 2020-03
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3. Spatial distribution of wood volume in Brazilian savannas
Abstract: Here we model and describe the wood volume of Cerrado Sensu Stricto, a highly heterogeneous vegetation type in the Savanna biome, in the state of Minas Gerais, Brazil, integrating forest inventory data with spatial-environmental variables, multivariate regression, and regression kriging. Our study contributes to a better understanding of the factor
An. Acad. Bras. Ciênc.. Publicado em: 21/10/2019
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4. Flora and Vegetation in Different Physiognomies of a Mussununga in Southeastern Brazil
ABSTRACT Mussununga is an understudied ecosystem within the Atlantic Forest domain, in sandy spodosol lowlands from Bahia to Espírito Santo. Its physiognomy varies from grassland to forest, with a transitional savannic area. We evaluated the life-form spectra differences between the grassland and savanna Mussunungas and its relationship with the depth of a
Floresta Ambient.. Publicado em: 12/09/2019
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5. Anthropogenic Disturbances Affect the Relationship Between Spectral Indices and the Biometric Variables of Brazilian Savannas
ABSTRACT According to previous studies involving biometric variables modeling using remote sensing (RS), data did not consider the effects of anthropogenic disturbance as relevant factor. The main objective of this study was to model aboveground biomass (AGB) and total wood volume (TWV) of Brazilian Savanna biome using vegetation indices (VI) from LANDSAT 5
Floresta Ambient.. Publicado em: 05/09/2019
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6. The study of biotic interactions in the Brazilian Cerrado as a path to the conservation of biodiversity
Abstract: As a focus for conservation efforts, biodiversity has received increased attention in the last fifty years. Searching for patterns in biodiversity, researchers have suggested studies including: ecological communities, cladistics classifications, hierarchical compositions of different levels of organization, and groups of taxonomically related speci
An. Acad. Bras. Ciênc.. Publicado em: 26/08/2019
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7. Does Crop-Livestock-Forest Systems Contribute to Soil Quality in Brazilian Savannas?
ABSTRACT In this paper we discuss the impact on conversion degraded pasture areas into an integrated crop, livestock and forest system (ICLFS). We collected 30 soil samples at 0-0.1 m depth in five agroforestry systems, degraded pasture and native areas along Brazilian Cerrado biome. We analyzed the influence of chemical variables on microbial biomass carbon
Floresta Ambient.. Publicado em: 01/07/2019
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8. Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos
Abstract The Colombian Orinoquia region is characterized by a high diversity of mammals, which is associated with complex ecosystems that include large extensions of Neotropical savannas (known locally as “Llanos Orientales”). Despite accelerated anthropogenic transformations in savanna ecosystems, the knowledge to design effective conservation strategie
Pap. Avulsos Zool.. Publicado em: 20/05/2019
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9. Evaluation of methods for estimating atmospheric emissivity in Mato-Grossense Cerrado
Resumo Este trabalho analisou o desempenho dos métodos de Brunt (1932), Swinbank (1963), Idso and Jackson (1969), Brutsaert (1975), Idso (1981) e Bignami et al. (1995) para estimativa da emissividade atmosférica para dados obtidos na região do Cerrado Campo Sujo, na baixada cuiabana. As estimativas foram comparadas com dados calculados pela equação do b
Rev. Ambient. Água. Publicado em: 09/05/2019
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10. A economia invisível do babaçu e sua importância para meios de vida em comunidades agroextrativistas
Resumo A amêndoa de babaçu (Attalea speciosa Mart. ex Spreng) é um dos principais produtos da extração vegetal no Brasil. As florestas secundárias formadas por babaçuais localizam-se na transição entre Amazônia, Cerrado e Nordeste semiárido, área onde reside um dos mais expressivos contingentes do campesinato no país. Apesar da disponibilidade d
Bol. Mus. Para. Emílio Goeldi. Ciênc. hum.. Publicado em: 29/04/2019
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11. Chromosome numbers and the systematics of tribe Vochysieae (Vochysiaceae)
ABSTRACT With five neotropical genera and ca. 220 species, Vochysieae is the largest tribe of Vochysiaceae, comprising more than 90 % of its species. Preliminary phylogenetic analyses with matK sequence data indicated that Vochysieae may be paraphyletic, separated into the clades QRC (Qualea, Ruizterania and Callisthene) and VS (Vochysia, Salvertia). Whether
Acta Bot. Bras.. Publicado em: 2018-06
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12. Hydropedology of a High Tableland with Cerrado, Brazilian Central Plateau: the Frutal Catchment Case Study
ABSTRACT: Currently, the Brazilian savanna (Cerrado) represents the main agricultural area of the country, comprising a great variety of landscapes and soils, geological formations and vegetation patterns, as well as the major watershed. We studied the hydropedology and morphometry of a representative catchment (Frutal river), on a high tableland (Chapada) i
Rev. Bras. Ciênc. Solo. Publicado em: 01/02/2018