Análise comparativa de dois remanescentes arbustivo-arbóreo de Caatinga

Marinho, Itaragil Venâncio; Lúcio, Assíria Maria Ferreira Nóbrega; Holanda, Alan Caué de; Freitas, Cirilo Berson Alves

doi:10.4336/2019.pfb.39e201701518

Cited by 4 publications

(2 citation statements)

References 10 publications

(12 reference statements)

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“…Some studies carried out in the Caatinga and Cerrado have listed at least one of the three most representative families of this study (Fabaceae. Euphorbiaceae, and Combretaceae) as those with the greatest number of species and abundance present in the area (MARINHO et al, 2019;SILVA et al, 2019;OLIVEIRA et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Dynamics of Woody Species in Dry Tropical Forest (Caatinga), Brazil

Barreto

Ferreira

Silva

et al. 2020

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Studying selected floristic changes in dry forests is fundamental to foster conservation and sustainability strategies. Objective: to analyze the occurrence of woody species in a tropical forest with a history of use. In 2008, 40 permanent plots were installed and wood with a circumference of 1.30 m at a breast height (CAP) ≥ 6 cm were measured. In 2012, newly established individuals (those that did not meet the size requirements in 2008 but did in 2012) and mortality of the remaining individuals were analyzed by computer. Where applicable, the density, frequency, and absolute dominance, importance value, newly established individuals, mortality, and gross growth for each species, along with the Shannon index were estimated. The floristic composition and diversity remain unchanged. After four years, there were few differences between species, while in most cases the growth in the basal area was positive and sometimes the number of newly established individuals exceeded the mortality. After 24 years of logging, the analyzed forest area did not reach its initial basal area stock when compared to other areas of the Caatinga that do not have a history of disturbance.

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Section: Discussionmentioning

confidence: 99%

Dynamics of Woody Species in Dry Tropical Forest (Caatinga), Brazil

Barreto

Ferreira

Silva

et al. 2020

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“…Os Luvissolos Crômicos são solos pouco profundos (rasos), pouco desenvolvidos e ricos em minerais primários (Francisco et al, 2019;Marinho et al, 2019), e foram enquadrados, assim como os Argissolos, em moderadamente estável/vulnerável. Na bacia hidrográfica, estão inseridos na região do baixo Rio Piancó (ao norte) nas proximidades do exutório, onde se encontram as áreas mais planas do relevo.…”

Section: = (G + R + P + O + C) /unclassified

Análise da Susceptibilidade à Erosão Hídrica em uma Bacia Hidrográfica do Semiárido Brasileiro

Silva

Leite

Cavalcanti

et al. 2021

Rev. Bras. Geog. Fis.

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A degradação dos solos constitui um dos principais problemas da atualidade, sendo decorrente, na maioria das vezes das ações irresponsáveis do ser antrópico sobre os recursos naturais, nesse cenário, o geoprocessamento se apresenta como uma importante ferramenta de investigação, servindo de base para identificação dos níveis de degradação ambiental, bem como na classificação de terras e na elaboração de mapas cartográficos que auxiliem no planejamento público, e em novas pesquisas acadêmicas. Neste estudo, teve-se por objetivo avaliar a susceptibilidade à erosão hídrica na Bacia Hidrográfica do Rio Piancó, por meio de geotecnologias. Em síntese, a sequência dos procedimentos metodológicos utilizados nesta pesquisa foram: levantamento bibliográfico, criação de um banco de dados georreferenciados, atribuição de pesos as classes de susceptibilidade à erosão do solo, elaboração de mapas temáticos e geração de um mapa final de vulnerabilidade à erosão hídrica. A partir dos resultados, foi possível identificar áreas de incompatibilidade legal e averiguar que 66% da área de estudo apresentou grau de vulnerabilidade medianamente estável/vulnerável e que outros 19% da área enquadraram-se de moderadamente vulnerável a vulnerável, indicando assim, a necessidade da adoção de medidas mitigadoras a fim de reduzir a vulnerabilidade dos solos nesses locais. Por fim, pôde-se concluir, que o uso de geotecnologias associado a modelos empíricos é eficaz na classificação de vulnerabilidade à erosão hídrica. Analysis of Susceptibility to Water Erosion in a Hydrographic Basin on the Brazilian SemiaridA B S T R A C T Soil degradation is one of the main problems nowadays, being the result, in most cases, of the irresponsible actions of anthropic being on natural resources, in this context, geoprocessing presents itself as an important research tool, serving as a basis for identifying levels of environmental degradation, as well as in the classification of lands and in the elaboration of cartographic maps that assist in public planning and in new academic research. In this study, the objective was to evaluate the susceptibility to water erosion in the Piancó River Hydrographic Basin, through geotechnologies. The sequence of the methodological procedures used in this research were: creation of a georeferenced database, assigning weights to classes of susceptibility to soil erosion, thematic maps elaboration and generation of a final map of vulnerability to water erosion. From the results, it was possible to identify areas of legal incompatibility and ascertain that 66% of the study area had a moderately stable / vulnerable degree of vulnerability and that another 19% of the area classified themselves as moderately vulnerable to vulnerable, thus indicating the need the adoption of mitigation measures in order to reduce the vulnerability of soils in these places. Finally, it was concluded that the use of geotechnologies associated with empirical models is effective in classifying soil vulnerability to water erosion.Keywords: Environmental vulnerability. Geoprocessing. GIS. Environmental planning.

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