Relações solo-vegetação na estruturação de comunidades de cerrado sensu stricto no sul de Minas Gerais, Brasil

Torres, Daniel Mendonça; Fontes, Marco Aurélio Leite; Samsonas, Henrique do Prado

doi:10.1590/2175-7860201768121

Cited by 14 publications

(7 citation statements)

References 37 publications

(33 reference statements)

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“…Families with the greatest diversity (number of species/family/ha) were Fabaceae (9), Myrtaceae (8), Asteraceae (7), Melastomataceae (7), Lauraceae (6) and Rubiaceae representing 46.7% of local richness, similar to results from other studies (Oliveira et al, 2015; Torres et al, 2017). Therefore, most of the local diversity is concentrated in a few families.…”

Section: Resultssupporting

confidence: 86%

Soil Influences on Tree Species Distribution in a Rupestrian Cerrado Area

et al. 2018

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This study aimed to analyze relations between the distribution of tree species and variations in soil texture, fertility and organic matter levels in a rupestrian cerrado area located in Diamantina-MG. Individual trees with circumference at soil level (PC) ≥ 3 cm were sampled in 10 plots of 20x50m. Samples of surface soil (0.00-0.20 m of depth) were collected from each plot and analyzed for their chemical and physical properties. Through canonical correspondence analysis, Eremanthus incanus, Kielmeyera lathrophyton, Terminalia sp and Vochysia discolor show a stronger relation to higher potassium and remaining phosphorus levels; the species Xylopia sericea, Protium spruceanum and Protium heptaphyllum show a stronger relation to higher levels of organic matter and total cation exchange capacity; the species Roupala montana, Qualea grandiflora, and Erythroxylum suberosum grew uniformly in all plots. There is relation between species distribution and chemical and physical soil variables in the area.

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Section: Resultssupporting

confidence: 86%

Soil Influences on Tree Species Distribution in a Rupestrian Cerrado Area

et al. 2018

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“…Similarly to other studies areas of Rupestrian Savannah (Silva et al 1996;Amaral et al 2006;Miranda et al 2007Miranda et al , 2010Moura et al 2007Moura et al , 2010Oliveira and Martins 2007;Pinto et al 2009;Abreu et al 2012;Santos et al 2012;Gomes et al 2016;Torres et al 2017), the families Myrtaceae, Fabaceae, Malpighiaceae and Erythroxylaceae were the richest families observed in the present study. These families were referred by Goodland and Ferri (1979) as "overrepresented" in the Cerrado.…”

Section: Discussionsupporting

confidence: 89%

Ferruginous Rupestrian Savannah: a floristic and structural analysis of these rare environments

Pereira¹,

Soares²,

Fonseca³

et al. 2019

NBC

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The flora of the Rupestrian Savannah (Cerrado Rupestre) is composed of widely distributed species and endemic species from high altitude rocky outcrops. The aim of this study was to characterise the floristic composition, structure and diversity of fragments of Rupestrian Savannah in south-eastern Brazil and to examine the similarity with other rupestrian cerrado vegetations and with cerrado sensu stricto on profound soils. For this, phytosociological parameters, evenness and diversity were calculated and compared with other studies. The survey exhibited 72 species, 45 genera, 30 families and high floristic similarity with cerrado on profound soils. There were no indicator species of the Rupestrian Savannah, but there were typical species of rocky environments. The basal area was significantly larger in the profound soil cerrado in relationship to the Rupestrian Savannah and evenness was lower in the Rupestrian Savannah of this study compared to others. These variables reflect the lower exploration capacity of the root of rocky environments. The highest similarity between the Rupestrian Savannah and cerrado on profound soils refers to the canga ferruginous nature, which represents the limit of the tableland of cerrado on the edge of the plateaus, allowing greater sharing of flora.

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“…The most abundant species were Heteropterys byrsonimifolia, Machaerium opacum, Terminalia fagifolia, Copaifera langsdorffi i and Curatella americana. These species are commonly observed in studies about forest inventories in the Brazilian savanna, for instance, in Torres et al (2017) and Massi et al (2017). A value of 8.74 cm for diameter average and 4.5 m of height was obtained by Araújo et al (2007).…”

Section: Resultsmentioning

confidence: 80%

Artificial Neural Networks for Estimating Tree Volume in the Brazilian Savanna

Lacerda

Cabacinha

Júnior

et al. 2017

CERNE

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This paper seeks to estimate tree volumes of different species from the Brazilian savanna by using artificial neural networks and by making comparisons of results with estimates obtained from traditional volumetric equations. Data was obtained from 15 squared samples of 400 m² in an area of 29.6 ha. In each plot, breast height diameter (D) (diameter at 1.30 m from soil), total height (Ht) and commercial height (Hc) of all individuals with D equals or higher than 3.0 cm were measured. Afterwards, each tree was felled for volume measurement. Huber method was used considering measurement of stem diameters with more than 3.0 cm. Obtained data was used to train artificial neural networks (ANN) and to adjust volumetric equations to estimate total and commercial volume of trees. This study has shown that ANN and regression models are efficient for obtaining estimated volumes of trees in the Brazilian savanna. This suggests that artificial neural networks, that take into consideration species as a categorical input variable and were data trained, presented better results than those that are trained without categorical input. REDES NEURAIS ARTIFICIAIS PARA ESTIMAR O VOLUME DE ÁRVORES NO CERRADORESUMO: Neste artigo buscou-se estimar os volumes de árvores de diferentes espécies do Cerrado usando redes neurais artificiais e fazer comparações dos resultados com estimativas obtidas a partir de equações volumétricas tradicionais. Os dados foram coletados em 15 parcelas de 400 m² em uma área de 29,6 ha. Em cada parcela, o diâmetro da altura do peito (D) (diâmetro a 1,30 m do solo), a altura total (Ht) e a altura comercial (Hc) de todos os indivíduos com D igual ou superior a 3,0 cm foram medidos. Depois, cada árvore foi derrubada para obtenção do volume. O método de Huber foi usado considerando a medida dos diâmetros do fuste até 3,0 cm. Os dados obtidos foram utilizados para treinar redes neurais artificiais (RNA) e ajustar equações volumétricas para estimar o volume total e comercial das árvores. Este estudo mostrou que as RNA e as equações volumétricas são eficientes para a obtenção de volumes estimados de árvores no Cerrado. As redes neurais artificiais, que consideram a espécie como uma variável categórica de entrada, apresentaram melhores resultados do que aquelas que são treinadas sem essa variável.

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Relações solo-vegetação na estruturação de comunidades de cerrado sensu stricto no sul de Minas Gerais, Brasil

Cited by 14 publications

References 37 publications

Soil Influences on Tree Species Distribution in a Rupestrian Cerrado Area

Soil Influences on Tree Species Distribution in a Rupestrian Cerrado Area

Ferruginous Rupestrian Savannah: a floristic and structural analysis of these rare environments

Artificial Neural Networks for Estimating Tree Volume in the Brazilian Savanna

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