Efeitos de Gradientes Ambientais na Fitossociologia de Assembleias de Palmeiras no Sudeste de Roraima, Brasil

Gomes, J.P.; Condé, Tiago Monteiro; Santos, R.L.; Dionisio, L.F.S.; Duarte, O.R.; Miranda, D.L.C.; Silva, F.

doi:10.14583/2318-7670.v04n05a08

Cited by 5 publications

(6 citation statements)

References 22 publications

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“…T. M. Condé et al (2022) The values seen in LOt 1 (H'= 1.92) and LOt 2 (H'= 2.20) were also lower than the values obtained in Ds, shown above, indicating possible differences of phytophysiognomy, and the influence of environmental gradients on the occurrence of the various spatial patterns of the species of Amazonian arboreal flora (GOMES et al, 2016;MIRON et al, 2021). However, it is important to emphasise that the diversity index can undergo significant changes depending on both the sampling intensity and inclusion criteria for the trees, based on different objectives, such as, for example, quantifying the natural regeneration of the forest, mortality, growth, entry, carbon stock, timber potential, etc.…”

Section: Resultsmentioning

confidence: 76%

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Phytosociology and the timber potential of transitional ecosystems from forested campinarana to dense forest in the south of Roraima, Brazil

Condé¹,

Borges²,

Costa³

et al. 2022

AGRO@MBIENTE ON-LINE

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Transitional forest ecosystems in the south of the state of Roraima show great heterogeneity of tree species and represent different volumes of timber stock in projects of vegetation suppression requiring Deforestation Licences (DL). The aim of this study was to evaluate the phytosociology and standing timber volume in ecosystems of Submontane Dense Ombrophilous Forest (Ds) and transitional Campinarana/Ombrophilous Forest (LOt1 and LOt2) in the district of Rorainópolis, Roraima. The DL were issued and authorised from 2011 to 2016 by the State Foundation for the Environment and Water Resources of Roraima (FEMARH) and the Brazilian Institute of the Environment and Renewable Natural Resources (IBAMA). A total of 9,391 timber-yielding trees were analysed, with a DBH ≥ 45 cm in 646.5 hectares; these belonged to 21 botanical families, 73 species and 8 taxa identified at the genus level. Diversity and evenness were greater in Ds (H’ = 3.34; J = 0.82) compared to LOt (H’ = 1.92 to 2.20; J = 0.55). The floristic similarity was greater between Ds and LOt2, of different forest typologies, showing that transitional environments can be complex in terms of floristic composition and diversity. However, the larger volumes of timber stock in LOt1 and LOt2 compared to Ds may be related not only to natural processes, but also to the influence of deforestation and illegal selective logging in the surrounding area. There is a strong need for studies on transitional forest ecosystems in the Amazon, due to the complexity of the ecological relationships, the influence of environmental gradients, and anthropogenic factors.

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Section: Resultsmentioning

confidence: 76%

“…The horizontal structure was analysed as recommended by Müller-Dombois and Ellemberg (1974), Condé and Tonini (2013) and Gomes et al (2016). The diversity of the timber species was obtained by applying the Shannon index (H') using the natural logarithm as base, and the Pielou uniformity or evenness index (j).…”

Section: Fitossociologiamentioning

confidence: 99%

Phytosociology and the timber potential of transitional ecosystems from forested campinarana to dense forest in the south of Roraima, Brazil

Condé¹,

Borges²,

Costa³

et al. 2022

AGRO@MBIENTE ON-LINE

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“…As espécies E. precatoria e E. olearecae demonstraram importância no contexto fitossociológico, sendo influenciadas por gradientes ambientais, principalmente pela proximidade de corpos hídricos. A água pode ser considerada um fator determinante no sucesso da gestão de plantios do gênero Euterpe (COSTA et al, 2009;GOMES et al, 2016).…”

Section: Discussionunclassified

“…The species E. precatoria and E. olearecae showed the importance in the phytosociological context, which is influenced by environmental gradients, mainly by the proximity of water bodies. Water can be considered a determining factor in the success of Euterpe plantation management (COSTA et al, 2009;GOMES et al, 2016).…”

Section: Plantationsmentioning

confidence: 99%

Açaí fruit production and carbon stock in managed plantations in Southeast of Roraima

Condé

Sousa

2020

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The quantification of the carbon stock present in fruits and residues from the manufacture of açaí pulp provides an estimate of the contribution of these key-species to the Amazonian ecosystem to maintain the Earth’s climatic balance. Thus, this work aimed to evaluate the production and carbon stock, based on factor 0.5, developed by the Intergovernmental Panel on Climate Change (IPCC), present in açaí (Euterpe oleraceae M.) “BRS-Pará”, in managed plantations in São João da Baliza, Roraima. Allometric models were adjusted to estimate the carbon stock present in the fruits, bunches, and total (bunch and fruits) of açaí in terms of height and root collar diameter, a variable easily measured in the field. The production of açaí fruits and the forest carbon stock were higher in the managed planting with restriction thinning of only one remaining stem (single) about managed planting with thinning and clump conduction (average of three stipes). Therefore, both plantations provided a large production of açaí pulp with good economic yield and increased forest carbon stock per hectare.

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“…Trata-se de uma família com forte interação com áreas alagáveis. A distância de rios é uma preditora ambiental importante na definição da composição de assembleias de palmeiras em áreas alagáveis (Gomes et al, 2016). Algumas destas espécies estão especialmente adaptadas ao ambiente de áreas alagadas como o indicado por Peña-Claros & Zuidema (1999) para Euterpe precatoria.…”

Section: Discussionunclassified

O componente arbóreo de 1,0 ha de floresta de várzea no Sudoeste da Amazônia, Rondônia, Brasil

Paixão¹,

Silveira

2020

RBCA

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Efeitos de Gradientes Ambientais na Fitossociologia de Assembleias de Palmeiras no Sudeste de Roraima, Brasil

Cited by 5 publications

References 22 publications

Phytosociology and the timber potential of transitional ecosystems from forested campinarana to dense forest in the south of Roraima, Brazil

Phytosociology and the timber potential of transitional ecosystems from forested campinarana to dense forest in the south of Roraima, Brazil

Açaí fruit production and carbon stock in managed plantations in Southeast of Roraima

O componente arbóreo de 1,0 ha de floresta de várzea no Sudoeste da Amazônia, Rondônia, Brasil

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