Abstract:FLORÍSTICA E ESTRUTURA DE FLORESTAS TROPICAIS SAZONALMENTE SECASRESUMO: Neste estudo, objetivou-se caracterizar florística e estruturalmente a comunidade arbórea em uma área de encosta, Caatinga arbórea e em área ecotónal com cerrado no Parque Nacional Cavernas do Peruaçu, Norte de Minas Gerais, buscando testar as seguintes hipóteses: 1-Existem diferenciações florísticas entre os ambientes; 2-Todos os ambientes apresentam as mesmas características quanto à estrutura. , e a equabilidade de Pielou foi de 0,80, 0… Show more
“…However, it should be emphasized that comparisons should be made with care and caution, since there are methodological differences between the works. For example, inclusion level based on height (Santana & Souto, 2006;Rodal et al, 2008), in circumference at 0.30 m from the soil (Bessa & Medeiros, 2011;Pereira et al, 2012;Calixto & Drumond, 2014) and at 1.3 m from the soil (Ferraz et al, 2013;Ferraz et al, 2014;Brand et al, 2015;Menino et al, 2015;Souza et al, 2015;Pimentel et al, 2016;present work).…”
The aim of this study was to analyze the dynamics of the community and shrub-woody individuals in a dry forest in the Brazilian semiarid region after 29 years of vegetation suppression. Individuals with a circumference at 1.30 m above the ground (CBH) ≥ 6 cm were counted and their heights and CBH were measured in 40 permanent plots on three monitoring occasions (2011, 2013 and 2015). In the period between 2011 and 2015 the area presented a below average precipitation for the last 30 years. Phytosociological parameters and diversity were estimated. The density of individuals decreased from 2011 to 2015 (p < 0.01) and the basal area was similar. During the monitoring period, Poincianella bracteosa stood out in density, frequency and dominance. Phytosociological changes were more evident for an interval of four years. After 29 years of vegetation suppression, the community diversity is within the values for preserved semiarid (caatinga) vegetation. A long period of drought was the main disturbance factor affecting vegetation dynamics.
“…However, it should be emphasized that comparisons should be made with care and caution, since there are methodological differences between the works. For example, inclusion level based on height (Santana & Souto, 2006;Rodal et al, 2008), in circumference at 0.30 m from the soil (Bessa & Medeiros, 2011;Pereira et al, 2012;Calixto & Drumond, 2014) and at 1.3 m from the soil (Ferraz et al, 2013;Ferraz et al, 2014;Brand et al, 2015;Menino et al, 2015;Souza et al, 2015;Pimentel et al, 2016;present work).…”
The aim of this study was to analyze the dynamics of the community and shrub-woody individuals in a dry forest in the Brazilian semiarid region after 29 years of vegetation suppression. Individuals with a circumference at 1.30 m above the ground (CBH) ≥ 6 cm were counted and their heights and CBH were measured in 40 permanent plots on three monitoring occasions (2011, 2013 and 2015). In the period between 2011 and 2015 the area presented a below average precipitation for the last 30 years. Phytosociological parameters and diversity were estimated. The density of individuals decreased from 2011 to 2015 (p < 0.01) and the basal area was similar. During the monitoring period, Poincianella bracteosa stood out in density, frequency and dominance. Phytosociological changes were more evident for an interval of four years. After 29 years of vegetation suppression, the community diversity is within the values for preserved semiarid (caatinga) vegetation. A long period of drought was the main disturbance factor affecting vegetation dynamics.
“…, Menino et al. ). However, floristic knowledge of these karst areas is still incomplete, as reflected by the continuing discovery of new species (e.g.…”
We report the first record of Oziroë argentinensis (Asparagaceae) for Brazil, previously known from Paraguay, Bolivia, and Argentina. The plant was collected in the state of Mato Grosso do Sul, growing between limestone rocks, and is the first record of any species of Oziroë on this substrate.
“…Caatinga biome is a Brazilian formation forest with xerophytic plants, some different ecoregions (ANTUNES et al, 2014;APGAUA et al, 2014;ANDRADE et al, 2015;MENINO et al, 2015;SILVA et al, 2018), with high evapotranspiration, and concentrated rainfall in a short period.…”
Section: Introductionmentioning
confidence: 99%
“…In addition, in Caatinga biome area, is common the disordered anthropogenic actions and climate changes, causing processes such as the loss of biodiversity and desertification (ANTUNES et al, 2014;APGAUA et al, 2014;ANDRADE et al, 2015;MENINO et al, 2015;DRUMOND et al, 2016;SILVA et al, 2018). Walter et al (2019) describes that Caatinga biome area it covers about 53.1% of the territory of the Northeast region of the country, which represents about 882,081 km 2 and more than 20 million people living in this vast location (FERREIRA & CUNHA, 2013).…”
Section: Introductionmentioning
confidence: 99%
“…Currently, there are some efforts to promote a sustainable production of forest essences from Caatinga biome, for example, studies in seedling formation (ANTUNES et al, 2014;ANDRADE et al, 2015;MENINO et al, 2015), bioecology (APGAUA et al, 2014), morphology (LOUREIRO et al, 2013), satellite analyses (SILVA et al, 2018), and thermal image (DIAS JÚNIOR, et al, 2019). However, for some species in Caatinga species have dormancy and this fact can be disturbing the forest production and this fact is poorly studied (Medeiros et al, 2005) or are recommendation the acid treatments to improve the germination to broken the seed resistance in Euphorbiaceae family (LOUREIRO et al, 2013).…”
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