Estrutura e distribuição espacial de Trichilia elegans A. Juss. (Meliaceae) em uma floresta sem idecídua no Pantanal da Nhecolândia, Mato Grosso do Sul, Brasil

Lehn, Carlos Rodrigo; Salis, S. M. de; Mattos, P. P. de; Junior, Geraldo Alves Damasceno

doi:10.5216/rbn.v5i2.9810

Cited by 5 publications

(6 citation statements)

References 29 publications

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“…O padrão agregado dos indivíduos regenerantes e aleatório das árvores adultas sustenta, portanto, a hipótese de que a canela-sassafrás apresenta altas taxas de mortalidade dependente de densidade. Lehn et al (2008), analisando as populações de jovens e adultos de Trichilia elegans A. Juss., espécie típica de sub-bosque, também constataram que os indivíduos jovens se encontram mais agrupados e que o grau de agregação tende a diminuir durante o desenvolvimento ontogenético.…”

Section: Padrões Espaciais Para Classes De Tamanhounclassified

PADRÕES ESPACIAIS NA REGENERAÇÃO DE Ocotea odorifera NA FLORESTA NACIONAL DE IRATI, PR

Dalmaso¹,

Inoue²,

Filho³

et al. 2013

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ResumoEste trabalho teve o objetivo de analisar e descrever os padrões espaciais e as características qualiquantitativas da regeneração da espécie arbórea Ocotea odorifera (Vell.) Rohwer (canela-sassafrás) num fragmento de Floresta Ombrófila Mista localizado na Floresta Nacional de Irati, região centrosul do estado do Paraná. Para tanto, foram selecionados três hectares de amostra para coleta de informações sobre altura, diâmetro e localização de todos os indivíduos de canela-sassafrás com altura total ≥30 cm. Análises univariadas por meio da função K de Ripley foram realizadas, para descrever os padrões espaciais dos indivíduos em fases distintas de regeneração e das árvores adultas dessa espécie com diferentes tamanhos. A espécie apresentou em geral um padrão espacial agregado para a regeneração natural em todas as escalas analisadas, sugerindo ser um padrão característico da espécie nas fases iniciais. A mudança do padrão agregado para aleatório foi comprovada com a análise espacial para as diferentes classes de tamanho dos indivíduos de canela-sassafrás. Algumas inferências foram feitas em relação aos processos subjacentes, que podem estar associados com os resultados. É possível afirmar que a espécie apresenta potencialidades para o manejo e a conservação com excelente capacidade de regeneração natural. Palavras-chave: Floresta com Araucária; autoecologia; estatística espacial; canela-sassafrás. Abstract Spatial pattenrs for Ocotea odorifera regeneration in National Forest, Irati, Pr.The present research aimed to analyze and describe spatial patterns and quali-quantitative features of natural regeneration of tree species of Ocotea odorifera (Vell.) Rohwer (canela-sassafrás) in a fragment of Mixed Ombrophyllous Forest (Araucarian Forest) located at the National Forest of Irati, Paraná State, Southern Brazil. Three plots of one hectar each were sampled and height, diameter and location informations were collected for all plants of canela-sassafrás with total height ≥ 30 cm. Univariate analyzes using K-function of Ripley were done in order to describe spatial patterns of plants at different regeneration phases as well as of canela-sassafrás adults. Generally, this species presented an aggregated spatial pattern at all considered scales of regeneration, suggesting to be a typical pattern at initial phases of this species. The change from aggregated to random spatial pattern was tested analyzing different size classes of canela-sassafrás. Some inferences were made considering subjacent processes that could be associated to obtained results. It is possible to say that the studied species presents potencialities for its management and conservation with excellent natural regeneration capacity.

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Section: Padrões Espaciais Para Classes De Tamanhounclassified

PADRÕES ESPACIAIS NA REGENERAÇÃO DE Ocotea odorifera NA FLORESTA NACIONAL DE IRATI, PR

Dalmaso¹,

Inoue²,

Filho³

et al. 2013

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“…This behavior is in agreement with the statements of Santos et al (2016), who argued that the diameter structure of a forest characterized by small trees of the smallest diameter classes indicates balanced distribution trends, given the regeneration capacity of plant species. Furthermore, a high number of individuals in small diameter classes suggests that the species has great regenerative potential and capacity to maintain current density levels (Lehn et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

Diameter Distribution of Vouacapoua americana Aublet in the Brazilian Amazon

Pereira¹,

Ruschel²,

Costa³

et al. 2023

JAS

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Vouacapoua americana Aublet was classified as endangered in 2013 and its extraction banned in 2014. Forest management allows conservation and sustainable production, but, for this, knowledge of diameter distribution is fundamental. This study aimed to characterize and analyze diameter distribution patterns of the species at different sites in the Brazilian Amazon. Data on trees with diameter ≥ 10 cm were acquired from continuous forest in permanent sample plots and preharvest forest inventories (PHFIs) of nine forest management areas. Absolute density, diameter distribution, and De Liocourt quotient (q) were calculated. Diameter distributions were fitted by a linearized Meyer type I distribution function, and the similarity between distributions was analyzed by the nonparametric Kruskal-Wallis test (H-test). The species showed high density (6.31 to 25.55 trees/ha). Mensrured diameters ranged from 10.00 to 127.32 cm. A decreasing behavior was observed in all diameter distributions, with few discontinuous distributions and mostly truncated distributions. The De Liocourt quotient (q) did not show constancy or proximity, with values ranging from 0.4 to 23.48. Diameter distributions did not differ by the Kruskal-Wallis test (H = 15.45, p = 0.3479). Diameter distributions fitted by the Meyer model resulted in an inverted “J”-like curve. The diameter structure showed a high density of individuals, a decreasing distribution from smaller to larger diameter classes, a characteristic inverted “J” pattern, and unbalanced diameter distributions.

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“…The Cabraleacanjerana, observed in a deciduous Seasonal Forest, shows an aggregated type of dispersion (ZIMMERMANN et al, 2014).In fact, NASCIMENTO et al, (2001) and SILVESTRE et al, (2012) in their examination of the whole community in a Mixed Ombrophilous Forest, identified a prominent aggregated distribution. In the Pantanal, the trees revealed a grouped spatial distribution in a semi deciduous forest (LEHN et al, 2008). In a small portion of the cerrado, limited in the southwest of Goiás, an aggregated spatial distribution pattern was noted (BERNASOL & LIMA-RIBEIRO, 2010).…”

Section: Introductionmentioning

confidence: 95%

Pattern and spatial associations of commercial trees in the Amazon

et al. 2021

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This study was conducted to establish the pattern and the spatial associations of the Amazon commercial tree groups. In a region extending across 2,000 ha in the Tapajós National Forest (FNT), Pará, a forest census was conducted. The census included commercial trees of perimeter at breast height (PBH), equal to or greater than 158 cm and the Cartesian coordinates of their bearings. Using Ripley’s K function, the spatial pattern was discerned, with 5 m radius being assumed, and maximum distances varying up to 1,500 m. Then, with 99.8% probability for both, 500 Monte Carlo simulations were performed for the univariate K function, and 500 toroidal simulations were done for the bivariate function.The commercial tree groups, which revealed an aggregated spatial pattern in a minimum of approximately 50% of the analysis distance were namely, Astronium lecointei, Bagassa guianensis, Couratari guianensis, Manilkara huberi, Mezilaurus itauba, and Vochysia maxima. In Brazil, the commercial tree groups, based on the commercialization criteria for tropical trees show random and aggregated spatial patterns with associations of spatial independence.

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Estrutura e distribuição espacial de Trichilia elegans A. Juss. (Meliaceae) em uma floresta sem idecídua no Pantanal da Nhecolândia, Mato Grosso do Sul, Brasil

Cited by 5 publications

References 29 publications

PADRÕES ESPACIAIS NA REGENERAÇÃO DE Ocotea odorifera NA FLORESTA NACIONAL DE IRATI, PR

PADRÕES ESPACIAIS NA REGENERAÇÃO DE Ocotea odorifera NA FLORESTA NACIONAL DE IRATI, PR

Diameter Distribution of Vouacapoua americana Aublet in the Brazilian Amazon

Pattern and spatial associations of commercial trees in the Amazon

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