Estrutura de Eschweilera amazonica R. Knuth (matamata-ci) em floresta de terra firme na Amazônia oriental

Silva, Antonia Sandra Oliveira da; Carvalho, J. O. P. de; Dionísio, Luiz Fernandes Silva; Ruschel, Ademir Roberto; Silva, Javier; Schwartz, Gustavo; Castro, Tatiana da Cunha

doi:10.18671/scifor.v51.52

Cited by 5 publications

(6 citation statements)

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“…Sapotaceae (Ds: 802; LOt 1 : 684; LOt 2 : 2,329) and Fabaceae (Ds: 575; LOt 1 : 281; LOt 2 : 985) were considered the most representative botanical families, i.e. hyperdominant, corroborating several Amazonian studies (CONDÉ; TONINI, 2013;ter STEEGE et al, 2013;SILVA et al, 2015RAMOS et al, 2019).…”

Section: Resultssupporting

confidence: 71%

“…Foram quantificadas 9.391 árvores exploradas comercialmente com DAP > 45 cm, distribuídas em 21 famílias botânicas, 73 espécies, sendo que 8 táxons foram identificados apenas em nível de gênero nos 646,5 ha representados por Ds, LOt 1 e LOt 2 (Material Suplementar). Sapotaceae (Ds: 802; LOt 1 : 684; LOt 2 : 2.329) e Fabaceae (Ds: 575; LOt 1 : 281; LOt 2 : 985) foram consideradas as famílias botânicas com maior representatividade, ou seja, hiperdominantes, corroborando com diversos estudos amazônicos (CONDÉ; TONINI, 2013;ter STEEGE et al, 2013;SILVA et al, 2015RAMOS et al, 2019).…”

Section: Resultsunclassified

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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: Resultssupporting

confidence: 71%

Section: Resultsunclassified

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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“…Por outro lado, a disposição diamétrica, apresentada na Figura 5, mostra que a comunidade obedeceu a distribuição exponencial negativa ou J-invertido, comum em populações nativas. Um dos fatores que podem ter contribuído para esta formação é o fato de ser um plantio jovem, apresentando a maior frequência de indivíduos na menor classe diamétrica, indicando que a população pode estar em fase inicial de estabelecimento (SILVA et al, 2023). De acordo com Silva et al (2020), a maior concentração de indivíduos na primeira classe diamétrica pode caracterizar também uma comunidade estoque, padrão de florestas tropicais estáveis com idades e composições variadas; esperase que esta condição seja observada, uma vez que a comunidade atinja idade reprodutiva.…”

Section: Resultsunclassified

Incremento Periódico Anual De Espécies Nativas Do Cerrado Consorciadas Com Eucalipto

Silva Junior,

Dias,

Barreira

2023

AGRARIAN

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RESUMOO Código Florestal vigente, Lei Nº 12.651 de 25 de maio de 2012, permite a implantação de espécies exóticas em reserva legal e estas podem ser manejadas pelo período de 20 anos. Dessa forma, os proprietários podem usufruir deste direito por meio de diferentes arranjos de plantios consorciados entre espécies nativas e espécies exóticas. Neste contexto, o objetivo deste trabalho foi avaliar o desenvolvimento, via incremento em altura, diâmetro e volume das espécies nativas Baru, Chichá, Copaíba, Ipê-roxo, Jatobá-da-mata, Jenipapo, Pequi, Peroba-rosa e Tamboril em plantio misto com Eucalipto, bem como analisar se a presença destes impacta positivamente ou não o estabelecimento e crescimento das espécies nativas. O plantio foi realizado em 2012 com espaçamento de 3 m x 3 m, no qual foram plantados 18 indivíduos em cada linha, totalizando 108 indivíduos entre as espécies nativas e 126 indivíduos de Eucalipto. Foram analisados os dados de inventários periódicos realizados entre 2015 a 2019 por meio do incremento periódico anual (IPA) em diâmetro, em altura e em volume. Os resultados obtidos mostram que as espécies nativas em geral se desenvolveram bem no arranjo proposto, mas verificou-se a necessidade de intervenções silviculturais, tais como podas, desrama ou desbaste devido a estagnação nas últimas medições. PALAVRAS-CHAVE: Arranjo de plantio. Inventário periódico, reserva legal.

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“…The present study was developed in the Nova Canaã Settlement Project, located within the denominated conservation unit of sustainable use in the State Forest of Amapá, located in the city of Porto Grande, Amapá (Figure 1). The forest cover of the studied area is typical Dense OmbrophilousForest of SolidLand, with a great diversity of woody and herbaceous species (SILVA et al, 2015). The climate of the region is Amtype, hot and humid, according to the Köppen classification, with average annual precipitation of 2300 mm (SOUZA; CUNHA, 2010).…”

Section: Methodsmentioning

confidence: 99%

“…In order to evaluate forest growth by subsidizing forest exploitation planning throughout the cutting cycle, the permanent sample units of continuous inventory in the Amazon region are implemented following the guidelines of the Amazon Forest Dynamics Monitoring Network (REDEFLOR), as can be observed in the works of Augustynczik et al (2013), Silva et al (2016), Silva et al (2015), Silva et al (2014), andSousa et al (2012). Therefore, due to a lack of theoretical basis for determining the dimension of permanent sample units for growth and production studies, standard size of 1 ha (100mx100m) or a sample unit of 2500 m 2 (50mx50m) is recommended, according to Silva et al (2005).…”

Section: Introductionmentioning

confidence: 99%

Size of sampling units aproppriate for management level forest inventory in Eastern Amazon, Brazil

Sousa,

Silva,

Ferreira

et al. 2023

Rev. Agro. Amb.

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This study aimed to indicate the ideal sample size for continuous forest inventories in the tropical forest in Amapá. Data were obtained from a monitoring inventory started in 2010 and completed in 2016, in five permanent sampling units of 100m x 100m with an inclusion level of DBH ≥ 10cm. Randomly allocated sample subunits with five different dimensions ranging from 400 m2 to 1600 m2 were simulated within these units. The measurement times of each sampling unit, from the first to the last three, were timed. Dimensions were analyzed for their accuracy and relative efficiency. Given the above and depending on the purpose of the inventory, the standard sampling unit of 1 ha (100 m x 100 m) is recommended for the inventory variables. The 20 m x 20 m (400 m2) square sampling unit was the most suitable for monitoring growth variables (annual increment in diameter, basal area, and volume), indicating that these sampling units for continuous inventories can become an essential alternative for use in monitoring inventory in the region.

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Estrutura de Eschweilera amazonica R. Knuth (matamata-ci) em floresta de terra firme na Amazônia oriental

Cited by 5 publications

References 0 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

Incremento Periódico Anual De Espécies Nativas Do Cerrado Consorciadas Com Eucalipto

Size of sampling units aproppriate for management level forest inventory in Eastern Amazon, Brazil

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