Análise da estrutura de comunidades arbóreas de uma floresta amazônica de Terra Firme aplicada ao manejo florestal

Alves, João Carlos Zenaide Oliveira; Miranda, Izildinha Souza

doi:10.1590/s0044-59672008000400008

Cited by 26 publications

(19 citation statements)

References 25 publications

(24 reference statements)

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“…At sampling, 31 rare species were observed, which corroborates other studies in the Amazon region (Prance et al 1976, Oliveira and Amaral 2004, Alves and Miranda 2008. However, the high number of rare species (with only one plant) can also be related to the small sample area of 0.12 ha.…”

Section: Open Ombrophilous Forestsupporting

confidence: 87%

Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil

Mendonça

Fernandes

Schaefer

et al. 2017

An. Acad. Bras. Ciênc.

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Viruá National Park encompasses a vast and complex system of hydromorphic sandy soils covered largely by the white sand vegetation ("Campinarana") ecosystem. The purpose of this study was to investigate a vegetation gradient of "terra-firme"-white sand vegetation at the Viruá National Park. Nine plots representing three physiognomic units were installed for floristic and phytosociological surveys as well as to collect composite soil samples. The data were subjected to assessments of floristic diversity and similarity, phytosociological parameters and to statistical analyses, focused on principal components (PC) and canonical correspondence analysis (CCA). The vegetation of the Campinaranas types and Forest differed in biomass and species density. Ten species, endemic to Brazil, were particularly well-represented. PC and CCA indicated a clear distinction between the studied plots, based on measured soil variables, especially base sum and clay, which were the most differentiating properties between Campinarana and Forest; For the separation of the Campinarana types, the main distinguishing variable was organic matter content and cation exchange capacity. Higher similarity of Campinaranas was associated to a monodominant species and the lower similarity of Forest was related to the high occurrence of locally rare species.

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Section: Open Ombrophilous Forestsupporting

confidence: 87%

Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil

Mendonça

Fernandes

Schaefer

et al. 2017

An. Acad. Bras. Ciênc.

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“…O índice de Uniformidade de Pielou (J = 0,89), encontrado nesse estudo, corrobora outros estudos realizados na Amazônia, nesses, os valores variam de 0,75 a 0,92 (KUNZ et al, 2008;ALVES;MIRANDA, 2008;OLIVEIRA et al, 2008;OLIVEIRA et al, 2015). A alta uniformidade está relacionada à homogeneidade de abundância entre as espécies amostradas, seguindo o padrão considerado normal em florestas tropicais secundárias, em suas fases intermediárias de sucessão (FONSECA et al, 2013).…”

Section: Figura 1 -Species To Area Ratio Curve For 18 Plots Inventoriunclassified

Importância fitossociológica de um fragmento de floresta ombrófila densa no estado de Roraima, Brasil

Dionísio

Filho

Crivelli

et al. 2016

AGRO@MBIENTE ON-LINE

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Resumo: Objetivou-se com o presente trabalho caracterizar a fitossociologia de um fragmento de floresta nativa no município de Caroebe/RR, Brasil. Foram inventariadas todas as árvores com DAP ≥ 15 cm, em 18 parcelas permanentes de 15 x 20 m (300 m²). Foram identificados 175 indivíduos, distribuídos em 17 famílias botânicas, 37 gêneros e 45 espécies. Os gêneros com maior riqueza florística foram Protium, Vantanea e Couratari. Entre as famílias, Fabaceae e Lecythidaceae foram as que apresentaram maior diversidade de espécies. As espécies de maior valor de importância foram Dinizia excelsa (7,49%), Protium heptaphylum (7,41%) e Zigia racemosa (7,40%). O Índice de Diversidade de Shannon (H') foi 3,39, e a Uniformidade de Pielou (J) foi 0,89. O grupo ecológico clímax foi predominante, com 26,7% das espécies e 21,7% dos indivíduos. A diversidade da floresta é baixa, embora predominem famílias que também estão presentes na maioria das florestas amazônicas maduras. Algumas espécies que possuem madeira com alto valor comercial também estão presentes na área com alto valor de importância ecológica. A distribuição dos indivíduos em classes diamétricas sugere que a floresta, ainda que jovem e com alta dinâmica, já se encontra em equilíbrio. Portanto, a área estudada pode ser manejada para extração de produtos madeireiros ou não-madeireiros, com fins conservacionistas, obedecendo às suas características fitossociológicas discutidas no presente estudo e à Legislação Brasileira. Palavras Abstract:The aim of this study was to characterise the phytosociology of a fragment of native forest in the town of Caroebe, in the State of Roraima, Brazil. All trees with a DBH ≥ 15 cm were inventoried in 18 permanent plots of 15 x 20 m (300 m²). There were 175 individuals indentified, distributed across 17 botanical families, 37 genera and 45 species. The genera with the greatest floristic richness were Protium, Vantanea and Couratari. Among the families, Fabaceae and Lecythidaceae showed the greatest species diversity. The species with the greatest value for importance were Dinizia excelsa (7.49%), Protium heptaphylum (7.41%) and Zigia racemosa (7.40%). The Shannon Diversity Index (H ') was 3.39, and the Pielou Uniformity Index (J) was 0.89. The climax ecological group was predominant, with 26.7% of the species and 21.7% of the individuals. The diversity of the forest is low, although families predominate which are also present in most mature Amazonian forests. Some species that have timber of high commercial value are also present in the area, with a high value for ecological importance. The distribution of individuals into diameter classes suggests that the forest, despite being young and highly dynamic, is already balanced. The study area can therefore be managed for the extraction of wood or non-wood products, with a view to conservation, by following phytosociological characteristics as discussed in the present study and Brazilian legislation.

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“…Os resultados do presente estudo corroboram vários estudos fitossociológicos na Amazônia (SOUZA et al, 2006;FRANCEZ et al, 2009;HIRAI et al, 2008;PINHEIRO et al, 2007;MIRANDA, 2008;REIS et al, 2010;ALMEIDA et al, 2012), em que M. huberi se destacou com alta densidade e área basal entre as espécies comerciais. Tabela 2.…”

Section: Resultsunclassified

Efeito Da Exploração De Impacto Reduzido Em Algumas Espécies De Sapotaceae No Leste Da Amazônia

Reis¹,

Silva²,

Reis³

et al. 2013

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ResumoAvaliou-se o efeito da exploração de madeira, realizada em 1997, na estrutura e dinâmica de algumas espécies de Sapotaceae em uma Floresta Ombrófila Densa, no município de Moju, Pará (02º12'26" S e 48º48'14" W AbstractEffect of reduced impact logging in some sapotaceae species in the eastern amazon. Effect of logging, held in 1997, on structure and dynamics of some Sapotaceae species were evaluated in a dense tropical rain forest located in the municipality of Moju, Pará (02º 12' 26" S e 48º 48' 14" W). Two hundred ha out of 1,050 ha forest area were selectively logged for timber (23 m 3 ha -1 logging intensity) in 1997.Twenty-two 0.5 ha permanent sample plots (11 ha sample) were established and all trees with dbh ≥ 10 cm were identified and measured for dbh in 1995 (before logging), 1998 and 2010 (after logging). Parameters evaluated were Density (De) and Basal area (G-m 2 ha -1). Sapotaceae presented a significant reduction of 7.7% on tree density (p=0.0147), and an dominance increase of 1.4% (p=0.7851). In the same period, decreases in density and basal area were observed to Pouteria laurifolia (Gomes) Radlk. Huberi did not recover its original density. On the other hand, three new species of the family were recorded in the focused period.

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Análise da estrutura de comunidades arbóreas de uma floresta amazônica de Terra Firme aplicada ao manejo florestal

Cited by 26 publications

References 25 publications

Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil

Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil

Importância fitossociológica de um fragmento de floresta ombrófila densa no estado de Roraima, Brasil

Efeito Da Exploração De Impacto Reduzido Em Algumas Espécies De Sapotaceae No Leste Da Amazônia

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