scholarly journals VARIAÇÕES NA COMPOSIÇÃO FLORÍSTICA EM FLORESTA ESTACIONAL SEMIDECIDUAL EM CURVELO-MG

Nativa ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 109
Author(s):  
Leovandes Soares da Silva ◽  
Thais Ribeiro Costa ◽  
Arthur Duarte Vieira ◽  
Stênio Abdanur Porfírio Franco ◽  
Evandro Luiz Mendonça Machado
Keyword(s):  
Diversity Index ◽  
Floristic Composition ◽  
Floristic Diversity ◽  
Semideciduous Forest ◽  
Minimum Diameter ◽  
Breast Height ◽  
Number Of Individuals ◽  
Composition Changes ◽  
Seasonal Semideciduous Forest ◽  
Over Time

O objetivo desse estudo foi avaliar as mudanças na composição florística em um fragmento de Floresta Estacional Semidecidual. No primeiro inventário realizado em 2011 foram alocadas 25 parcelas de 10 ×40 m. Foram mensurados todos os indivíduos vivos com diâmetro a altura do peito ≥ 5cm. O segundo inventário foi realizado em 2015, utilizando-se os mesmos critérios do inventário anterior, assim, foram incorporados os novos indivíduos (recrutas) que atingiram o diâmetro mínimo de inclusão. O correram mudanças na composição florística, a mortalidade dos indivíduos foi superior ao recrutamento, houve perda de cinco espécies e incremento de duas espécies. O número de espécies e a densidade dos indivíduos variaram com o tempo. As espécies que desapareceram eram representadas por poucos indivíduos. A perda de espécies refletiu no índice de diversidade de Shannon (H’) e equabilidade de Pielou, (H’passou de 4,05 para 3,99 e equabilidade de Pielou J’ de 0,83 para 0,82), no primeiro e segundo inventário respectivamente, mesmo assim, os valores apontam para uma diversidade florística elevada. As mudanças na composição florística não foram significativas, a perda de espécies teve relação com as menos representativas em número de indivíduos, entre os inventários a floresta se manteve estável.Palavras-chave: mortalidade, recrutamento, sucessão ecológica. VARIATIONS IN THE FLORISTIC COMPOSITION IN SEASONAL SEMIDECIDAL FORESTS IN CURVELO-MG ABSTRACT: The objective of this study was to evaluate the changes in floristic composition in a fragment of Seasonal Semideciduous Forest. In the first inventory carried out in 2011, 25 plots of 10 × 40m were allocated. All living individuals with a breast height diameter ≥5 cmwere measured. The second inventory was carried out in 2015, using the same criteria of the previous inventory, thus, were incorporated the new individuals (recruits) that reached the minimum diameter of inclusion. The floristic composition changes, the mortality of the individuals was superior to the recruitment, there were loss of five species and increase of two species. The number of species and the density of individuals varied over time. The species that disappeared were represented by few individuals. The loss of species reflected in the diversity index of Shannon (H ') and Pielou equability, (H' went from 4.05 to 3.99 and Pielou J 'equability from 0.83 to 0.82), in the first and second inventory respectively, even so, the values point to a high floristic diversity. The changes in floristic composition were not significant, the loss of species was related to the less representative in number of individuals, among the inventories the forest remained stable.Keywords: mortality, recruitment, ecological succession.

scholarly journals STRUCTURE AND FLORISTIC COMPOSITION IN A DENSE OMBROPHILOUS FOREST AREA UNDER FOREST MANAGEMENT

FLORESTA ◽  
2019 ◽  
Vol 49 (4) ◽  
pp. 793
Author(s):  
Yasmim Andrade Ramos ◽  
Bruno Aurélio Campos Aguiar ◽  
Marcos Vinicius Cardoso Silva ◽  
Renata Elaine Siqueira Matos ◽  
Maria Cristina Bueno Coelho ◽  
...  
Keyword(s):  
Forest Management ◽  
Diversity Index ◽  
Floristic Composition ◽  
Timber Production ◽  
Floristic Diversity ◽  
Forest Fragment ◽  
Floristic Similarity ◽  
Breast Height ◽  
Ombrophilous Forest ◽  
Dense Ombrophilous Forest

This study shows the phytosociology and floristics of a Dense Ombrophilous Forest fragment under forest management in Portel city, Pará State. Six conglomerates were sampled, divided into secondary and tertiary plots totaling 120 sample units of 0.4 hectares each, in which all trees with diameter at breast height (130 cm above ground; DBH) above 10 cm were measured. These individuals were botanically identified, and evenness and floristic similarity were calculated. There were 3,586 individuals distributed in 42 families, 121 genera, and 174 species. Families Fabaceae, Lecythidaceae, and Sapotaceae were the ones that obtained the highest IVI and the highest representativity of individuals. Species Eschweilera coriacea (DC.) S.A.Mori, Vouacapoua americana Aubl., and Tetragastris altissima (Aubl.) Swart were the ones with the highest IVI. Among the ten highest results, we highlight Syzygiopsis oppositifolia Ducke and Manilkara dardanoi Ducke, with great potential for timber production. The Shannon diversity index averaged 3.83 between the plots, and the Pielou evenness averaged 0.84, showing that the area presents high floristic diversity and great potential for forest management activities.

scholarly journals Diversity and Floristic Composition in the Analogous Vegetation of Indiviso, Baquerizo Moreno, Tungurahua

2021 ◽  
Author(s):  
J. Caranqui ◽  
M. Ortíz
Keyword(s):  
Relative Density ◽  
Research Study ◽  
Floristic Composition ◽  
Montane Forest ◽  
Transition Zones ◽  
Diameter At Breast Height ◽  
Breast Height ◽  
Importance Index ◽  
Palabras Clave ◽  
Number Of Individuals

This research study contributes to the knowledge of the diversity and similarity of vegetation more than 5 cm diameter at breast height (DBH); the study was carried out in the montane forest located in Tungurahua, Pillaro, Baquerizo Moreno, Indiviso (01°18’S, 78°30’W), at an altitude of 30,400 m. A transect of 1000 m² was made, divided into 5 plots of 50×4 m. The species were identified by the ESPOCH Herbarium, and the values calculated were relative density (DR) and relative dominance (DMR) to obtain the Importance Index (IV). 18 families, 29 genera, and 33 species were found, corresponding to 249 individuals, in which the largest number of individuals were accounted for by Escallonia myrtilloides (8.03%), Macleania rupestris (7.63%), Vaccinium floribundum (6.02%), Gynoxis buxifolia and Miconia bracteolata with 5.62%, Bacharis teindalensis and Blechnum loxensis with 4.82%, and Maytenus vertillata, Hypericum laricifolium, Tibouchina lepidota, Brachyotum ledifolium, Sympoccos with 4.02%; the remaining species had lower values. The reason for finding both species of shrub paramo and high montane forest is not so clear, since physiognomically the area under study was a high montane forest. Furthermore, no studies have been conducted in other transition zones, but for this reason, a high number of species of two types of vegetation is found. Keywords: analogue flowering, shrub paramo, high montane forest, indiviso. Resumen El presente trabajo contribuye al conocimiento de la diversidad y similitud de la vegetación mayor de 5 cm de diámetro a la altura del pecho (DAP); el estudio se realizó en el bosque montano localizados en provincia de Tungurahua, cantón Pillaro, parroquia Baquerizo Moreno, sector Indiviso, en las ccordenadas 01°18’S; 78°30’W, altitud 30.400 m.s.n.m. Se realizó un transecto de 1000 m², divididos en 5 subtransectos de 50×4 m. Las especies se identificaron el Herbario ESPOCH, los datos calculados fueron Densidad relativa (DR), dominancia relativa (DMR) para obtener Indice de Importancia (IV). se encontraron 18 familias, 29 géneros, 33 especies que corresponden a 249 individuos, en las cuales el mayor número de individuos cuenta Escallonia myrtilloides (8,03%), Macleania rupestris (7,63%), Vaccinium floribundum (6,02%), Gynoxis buxifolia y Miconia bracteolata con 5,62%, Bacharis teindalensis y Blechnum loxensis con 4,82%, Maytenus vertillata, Hypericum laricifolium, Tibouchina lepidota, Brachyotum ledifolium, Sympoccos quítense con 4,02%; el resto con valores inferiores. La explicación de tanto especies de páramo arbustivo y bosque montano alto no están tan claros, ya que fisionomicamente fue un bosque montano alto esta zona en estudio. Además no se han encontrado estudios en otras zonas de transición, pero por ello se encuentra un número alto de especies de dos tipos de vegetación. Palabras clave: vegetación análoga, páramo arbustivo, bosque montano, indiviso.

scholarly journals Floristic and structure of the arboreal community of an Ombrophilous Dense Forest at 800 m above sea level, in Ubatuba/SP, Brazil

2018 ◽  
Vol 18 (4) ◽  
Author(s):  
Ana Cláudia Oliveira de Souza ◽  
Luís Benacci ◽  
Carlos Alfredo Joly
Keyword(s):  
Sea Level ◽  
Diversity Index ◽  
Floristic Composition ◽  
Strong Similarity ◽  
Breast Height ◽  
Palm Trees ◽  
Tree Community ◽  
Dense Forest ◽  
Metadata Generation

Abstract: Undoubtedly, the publication of floristic lists and phytosociological studies are important tools for metadata generation, quantification and characterization of the megadiversity of Brazilian forests. In this sense, this work had the objective of describing the composition and the structure of the tree community of one hectare of Dense Atlantic Rainforest, at an altitude of 800 m. All individuals, including trees, palm trees, arborescent ferns and dead and standing stems, with a diameter at breast height (DBH) of ≥ 4.8 cm were sampled. After the identification of the botanical material, we proceeded to calculate the usual phytosociological parameters, besides the Shannon diversity index (H') and Pielou equability index (J). A total of 1.791 individuals were sampled, of which 1.729 were alive, belonging to 185 species, 100 genera and 46 families. The results obtained showed a strong similarity of structure and floristic composition with plots of both Montana and Sub Montana Ombrophilous Dense Forest studied in the same region. This reinforces the hypothesis that the transition between the phytophysiognomies of the Atlantic Ombrophylous Dense Forest is gradual, and that the boundaries between them cannot be clearly established.

scholarly journals Floristic composition of the Seasonal Semideciduous Forest in Southern Brazil: Reserva Biológica das Perobas, State of Paraná

2018 ◽  
Vol 40 (1) ◽  
pp. 35753
Author(s):  
Greta Aline Dettke ◽  
Laianne Mayara Pezenti Crespão ◽  
Luciana Veríssimo Siquerolo ◽  
Edemilson Luiz Siqueira ◽  
Marcelo Galeazzi Caxambú
Keyword(s):  
Floristic Composition ◽  
Southern Brazil ◽  
Semideciduous Forest ◽  
Seasonal Semideciduous Forest

scholarly journals NATURAL REGENERATION STRATUM AS AN INDICATOR OF RESTORATION IN AREA OF ENVIRONMENTAL COMPENSATION FOR MINING LIMESTONE, MUNICIPALITY OF BARROSO, MG, BRAZIL

2016 ◽  
Vol 40 (2) ◽  
pp. 189-196 ◽  
Author(s):  
Wanuza Helena Campos ◽  
Sebastião Venâncio Martins
Keyword(s):  
Significant Influence ◽  
Natural Regeneration ◽  
Riparian Vegetation ◽  
Diversity Index ◽  
Floristic Composition ◽  
Psidium Guajava ◽  
Floristic Diversity ◽  
Restoration Process ◽  
Number Of Species ◽  
Management Actions

ABSTRACT This study was conducted in a forest under restoration process, which belongs to the company Holcim Brasil S/A, in the municipality of Barroso, state of Minas Gerais (21º00'to 22º00'S and 43º00' to 44º00'W), where 40 plots (2 x 2 m) were set, spaced at 10 m, forming eight strata parallel to the watercourse present in the area. Floristic composition and natural regeneration stratum were characterized, and the formed strata allowed evaluating whether the riparian vegetation and watercourse influence on the local regeneration. It was found 162 individuals of 13 families, 18 genera and 22 species, and 10,125 individuals/ha were estimated. Successional classes from pioneer and early secondary and zoochory dispersion syndrome prevailed among species and individuals. The watercourse and riparian vegetation did not exercise significant influence (p> 0.05) on the number of species and regenerating individuals among the different strata of the forest. The diversity index of Shannon-Wiener (H') and equability of Pielou (J') were 2.691 and 0.870, respectively. The species Psidium guajava and Myrtaceae families presented the highest VI (value of importance). Natural regeneration analysis showed the low floristic diversity in the area, suggesting that corrective management actions should be adopted.

scholarly journals SEED BANK IN TWO SITES OF SEMIDECIDUOUS SEASONAL FOREST IN VIÇOSA, MINAS GERAIS

2016 ◽  
Vol 40 (3) ◽  
pp. 415-425 ◽  
Author(s):  
Antonio Jorge Tourinho Braga ◽  
Eduardo Euclydes de Lima e Borges ◽  
Sebastião Venâncio Martins
Keyword(s):  
Seed Bank ◽  
Floristic Composition ◽  
Soil Samples ◽  
Semideciduous Forest ◽  
Bank Levy ◽  
Successional Stages ◽  
Semideciduous Seasonal Forest ◽  
The Individual ◽  
Seasonal Semideciduous Forest ◽  
Distinct Period

ABSTRACT Aimed of this study was examine, describe and confronted the floristic composition and the density the seed bank in two successional stages of Seasonal Semideciduous Forest, in Viçosa, MG. Forty soil samples total in two distinct period (drought station finish and rainy station finis) and arranged for germinate in wooden boxes (0,5 x 0,5 x 0,1 m) in shading of 60%. The individual germination in each valuation epoch was compared utilizing the t test for independent samples; the test indicated one individual plants germination major in seed bank levy intermediary between epoch drought station finis and rainy station. Hundred nine taxons were sampled in the seed bank the forest altogether, 101 species were identified as belonging to 73 genera distributed among 40 families, 56 species commonness in two successional stages of forest and 49 species commonness of two levy period. Asteraceae was the families with the largest number of species as initial forest much as advanced forest, in both period of valuation. The herbaceous individuals predomination in all forests and valuation epoch, whit not representation the fragility of the seed bank.

scholarly journals REGENERAÇÃO NATURAL DE FLORESTA ESTACIONAL SEMIDECIDUAL EM DIFERENTES ESTÁGIOS SUCESSIONAIS (ZONA DA MATA, MG, BRASIL)

FLORESTA ◽  
2013 ◽  
Vol 44 (1) ◽  
pp. 111 ◽  
Author(s):  
Sustanis Horn Kunz ◽  
Sebastião Venâncio Martins
Keyword(s):  
Natural Regeneration ◽  
Species Abundance ◽  
Detrended Correspondence Analysis ◽  
Floristic Composition ◽  
Importance Value ◽  
Successional Stage ◽  
Semideciduous Forest ◽  
Regeneration Stage ◽  
Successional Stages ◽  
Seasonal Semideciduous Forest

O objetivo deste estudo foi avaliar a estrutura e a composição florística da regeneração natural de trechos de Floresta Estacional Semidecidual em diferentes estágios sucessionais. Para a estrutura fitossociológica, foram demarcadas sistematicamente 10 parcelas de 5 x 10 m em trecho de floresta em estágio médio de regeneração (FEM), floresta em estágio avançado de regeneração (FEA) e pastagem abandonada (PAS), sendo amostrados os indivíduos com altura ≥ 50 cme diâmetro à altura do solo ≤ 5 cm. Foi realizada análise de correspondência retificada e análise de espécies indicadoras de cada trecho. Na estrutura da regeneração natural da FEM e da pastagem, houve destaque de apenas uma espécie (Psychotria sessilis e Vernonia polyanthes, respectivamente) quanto ao Valor de Importância (VI), devido principalmente à alta densidade. Já na FEA não foi observada forte dominância por uma espécie. As três áreas apresentaram-se distintas quanto à abundância e composição de espécies, sugerindo que a matriz florestal é composta por um mosaico sucessional. Além disso, cada trecho ainda mantém espécies indicadoras características, de acordo com o estágio sucessional em que se encontram, razão pela qual ações de manejo e enriquecimento poderiam ser adotadas para acelerar o processo de sucessão.Palavras-chave: Composição florística; conservação; estrutura; sucessão secundária. AbstractNatural regeneration of seasonal semideciduous forest in different successional stages (Zona da Mata, MG, Brazil). The objective of this study was to evaluate the floristic structure and composition of the natural regeneration of stretches from Seasonal Semideciduous Forest in different successional stages. Ten plots, 5 x 10 meters in size, were systematically delimited for phytosociological structure in patches of forest which were in intermediate regeneration stage (FEM), advanced regeneration stage (FEA) and abandoned pasture (PAS).We sampled the individuals with ≥ 50 cm in height and diameter at ground height ≤ 5 cm. We performed Detrended Correspondence Analysis and analysis of indicative species of each forest section. In the natural regeneration structure of FEM and pasture it was featured only one species (Psychotria sessilis and Vernonia polyanthes, respectively) in the Importance Value (IV), mainly due to high density. In relation to the FEA there was no strong dominance by one species. The three sections showed distinct species abundance and composition, which suggests that the forest matrix comprises a successional mosaic. Furthermore, each stretch still maintains indicative characteristic species, according to the successional stage they are in. Because of this, management and enrichment actions could be performed to accelerate the succession process.Keywords: Floristic composition; conservation; structure; secondary succession.

scholarly journals An Ecological Comparison of Floristic Composition in Seasonal Semideciduous Forest in Southeast Brazil: Implications for Conservation

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Sérgio de Faria Lopes ◽  
Ivan Schiavini ◽  
Ana Paula Oliveira ◽  
Vagner Santiago Vale
Keyword(s):  
Indicator Species ◽  
Detrended Correspondence Analysis ◽  
Floristic Composition ◽  
Southeastern Brazil ◽  
Successional Stage ◽  
Semideciduous Forest ◽  
Hymenaea Courbaril ◽  
Forest Sites ◽  
Copaifera Langsdorffii ◽  
Seasonal Semideciduous Forest

We examined floristic patterns of ten seasonal semideciduous forest sites in southeastern Brazil and conducted a central sampling of one hectare for each site, where we took samples and identified all individual living trees with DBH (diameter at breast height, 1.30 m) ≥4.8 cm. Arboreal flora totaled 242 species, 163 genera, and 58 families. Fabaceae (38 species) and Myrtaceae (20 species) were families with the largest number of species. OnlyCopaifera langsdorffiiandHymenaea courbariloccurred at all sites. Multivariate analysis (detrended correspondence analysis and cluster analysis) using two-way indicator species analysis (TWINSPAN) indicated the formation of a group containing seven fragments in whichSiparuna guianensiswas the indicator species. This analysis revealed that similarities between studied fragments were due mainly to the successional stage of the community.

scholarly journals FLORISTIC DIVERSITY OF SECONDARY FOREST IN THE EASTERN AMAZON, STATE OF AMAPÁ

FLORESTA ◽  
2016 ◽  
Vol 46 (3) ◽  
pp. 343
Author(s):  
José Renan da Silva Guimarães ◽  
Marcelo De Jesus Veiga Carim ◽  
Luciedi De Cássia Leôncio Tostes ◽  
Salustiano Vilar da Costa Neto
Keyword(s):  
Secondary Forest ◽  
Diversity Index ◽  
Agricultural Practices ◽  
Floristic Composition ◽  
Natural Disturbances ◽  
Secondary Forests ◽  
Floristic Diversity ◽  
Composition And Structure ◽  
Significant Difference ◽  
Phytosociological Study

The increasing importance of secondary forests all over the world alerts us to the urgent need to understand the biophysical and social underlying factors that affect its regeneration after the abandonment of agricultural practices and natural disturbances. In the state of Amapá, studies related to the structure of secondary forests are still scarce. Therefore, this article aims to characterize the floristic composition and structure in two stretches of secondary forest in the eastern Amazon, state of Amapá. For the floristic and phytosociological study of tree species, 10 plots of 10 x 100 m (1.0 ha) were established: five plots in the community of São Francisco do Iratapuru and five plots in the community of Santo Antônio waterfall, totaling half a hectare (0,5 ha) in each area. In all plots, subjects with diameter at breast height (DBH) ≥ 5 cm were considered. In total, 1,183 subjects were sampled in the two stretches of forest. In stretch 01, 565 subjects belonging to 74 species, 55 genera and 33 families were recorded. In stretch 02, 618 subjects belonging to 26 species, 23 genera and 15 families were recorded. The Shannon diversity index (H'), estimated for stretch 1, was 3.52; and for stretch 2 (2.23). The two studied stretches, despite being registered at the same age, showed significant difference in the species richness, which is the major factor for diversity differences, resulting in low similarity between the studied forests.

scholarly journals Fitossociologia em fragmento de floresta estacional semidecidual em reserva legal no sudoeste do estado de Goiás

2021 ◽  
Vol 10 (2) ◽  
pp. e20710212383
Author(s):  
Ana Paula de Souza ◽  
Frederico Augusto Guimarães Guilherme ◽  
Pollyana de Godoy Borges ◽  
Daniele Aparecida Moreira Batista ◽  
Jéssica de Aguiar Pereira Soares ◽  
...  
Keyword(s):  
Conservation Status ◽  
Basal Area ◽  
Distribution Patterns ◽  
Diversity Indices ◽  
Ecological Groups ◽  
Importance Value ◽  
Human Disturbances ◽  
Semideciduous Forest ◽  
Breast Height ◽  
Seasonal Semideciduous Forest

In Goiás, seasonal forests structure studies are scarce, especially in fragments located in legal reserves, subject to human disturbances. Therefore, the study aimed to perform the phytosociology of a fragment of a rural property, in a seasonal semideciduous forest. We evaluated structure, richness, diversity, dispersion mechanisms, ecological groups, and species distribution patterns found in the study and floristic links between Cerrado, Amazon and Atlantic Forest. In a one-hectare sample plot, all live trees with a diameter at breast height ≥ 10 cm were measured. The values of density and basal area were 561 ind.ha-1 and 26.2 m².ha-1, respectively. We recorded 37 species with diversity indices (H’) of 2.36 and evenness (J’) of 0.65. Toulicia reticulata, Chaetocarpus echinocarpus, Bocageopsis mattogrossensis and Nectandra cuspidata were species with the highest importance value, corresponding to 69% and 65% of all density and basal area, respectively. Fabaceae obtained the highest floristic richness, with six species, although it was little represented in terms of abundance. Our results suggest that the fragment is a mature forest in good conservation status. This is reinforced by the high size of trees, in addition to the predominance of zoochoric (83.8%) and secondary (92.1%) individuals in the survey.

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