Projeção da Estrutura Diamétrica de Grupos Ecológicos em uma Floresta Ombrófila Mista

Machado, Sebastião; Cysneiros, Vinicius Costa; Nascimento, Rodrigo Geroni Mendes; Martins, Ana Paula Marques; Schmidt, Luciane Naimeke

doi:10.1590/2179-8087.001216

Cited by 20 publications

(24 citation statements)

References 26 publications

(54 reference statements)

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“…Machado et al (2017), for example, when studying this same type of forest and dividing it into ecological groups, found a similar behavior, with a higher concentration of individuals in the lower classes and a progressive reduction of the frequency in the subsequent classes. Schaaf et al (2006), upon analyzing a group of Mixed Ombrophilous Forest species, stated that the "inverted J" distribution was a result of intrinsic characteristics of each species and ecological characteristics such as limit size, longevity, growth and competition among individuals.…”

Section: Discussionmentioning

confidence: 64%

“…For example, the studies by Figueiredo Filho et al (2010), Longhi et al (2017) and Machado et al (2017), who worked with permanent plots in a Mixed Ombrophilous Forest in southern Brazil, Cysneiros et al (2017), who studied a remnant of Dense Ombrophilous Forest in Rio do Janeiro, and studies by Santos et al (2016), who worked with terra firme moist rainforest in the Amazon.…”

Section: Discussionmentioning

confidence: 99%

“…Such models are known as probability density function; Weibull 3P and Gama are among the most used (NASCIMENTO et al 2012;BINOTI et al, 2014;EBLING et al, 2014;TÉO et al, 2015;SCHIKOWSKI et al, 2016;. The evaluation of the performance of such diametric distribution functions is performed mainly by the Komolgorov-Smirnov adhesion test (ORELLANA et al, 2014;MACHADO et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Behavior of the Diametric Distribution of Ecological Groups in a Mixed Ombrophilous Forest Fragment

Oliveira

Schmitz

Camaño

et al. 2018

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The Mixed Ombrophilous Forest is one of the most threatened ecosystems in Brazil. It is thus necessary to understand its dynamics of growth over time so that sustainable use and conservation management strategies be proposed. The objective of this study is to evaluate the behavior of the diametric distribution of two pioneer and non-pioneer ecological groups in a fragment of Mixed Ombrophilous Forest considering four years of evaluations: from 2002 to 2017. Exponential, Gamma, Weber and Weibull 3P density probability functions were adjusted. The diametric behavior of the forest and the ecological groups analyzed remained negative exponentially, being a characteristic of natural forests. The distributions that best adjusted were Weibull 3P for the forest as a whole and for the group of pioneers, and Weber for non-pioneers. We concluded that ecological groups have the same pattern of diametric distribution as the forest as a whole. However, different forest management strategies are necessary considering the intrinsic characteristics of each group. Keywords: Araucaria Forest, probability density functions, diameter classes. Resumo Comportamento da distribuição diamétrica de grupos ecológicos em um fragmento de Floresta OmbrófilaMista. A Floresta Ombrófila Mista é um dos ecossistemas mais ameaçados do Brasil. Assim, é necessário entendimento da sua dinâmica de crescimento ao longo do tempo para que estratégias de manejo de uso sustentável e conservação sejam propostas. O objetivo deste trabalho foi avaliar o comportamento da distribuição diamétrica de dois grupos ecológicos, pioneiras e não pioneiras, em um fragmento de Floresta Ombrófila Mista, considerando-se quatro anos de avaliações no período de 2002 a 2017. Foram ajustadas as funções de densidade de probabilidade Exponencial, Gama, Weber e Weibull 3P. O comportamento diamétrico da floresta e dos grupos ecológicos analisados manteve-se exponencial negativo, sendo uma característica própria de florestas naturais. As distribuições que melhor se ajustaram foram a Weibull 3P, para a floresta como um todo bem como para o grupo das pioneiras, e a Weber, para as não pioneiras. Conclui-se que os grupos ecológicos apresentam o mesmo padrão de distribuição diamétrica da floresta como um todo. Contudo, são necessárias diferentes estratégias de manejo florestal, considerando-se as características intrínsecas de cada grupo. Palavras-chave: Floresta com Araucária, funções de densidade de probabilidade, classes de diâmetro.

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Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Behavior of the Diametric Distribution of Ecological Groups in a Mixed Ombrophilous Forest Fragment

Oliveira

Schmitz

Camaño

et al. 2018

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“…Foi realizada a análise gráfica das distribuições diamétricas com a comparação dos dados reais e estimados pelos dois métodos para os anos 2007 e 2010 para os três grupos ecológicos (Figuras de 1 a 3 It is possible to verify some standards regarding the behavior of ecological groups. For tolerant and intermediate species, the J-inverted standard is evident for both methods and with the real and estimated data (Figures 1 and 2), characterizing the forest populations perpetuity according to the successional advance (MACHADO et al, 2017), due to the composition of young individuals in its population. For the group of intermediaries, the lack of discontinuity occurs due to the sum of individuals of all species in this group, by diametric class.…”

Section: E Reais (2007 E 2010) Para Os Grupos Ecológicos De Espécies mentioning

confidence: 71%

“…Pode-se verificar alguns padrões quanto ao comportamento dos grupos ecológicos. Para as espécies tolerantes e intermediárias, o padrão J-invertido é evidente para os dois métodos e com os dados reais e estimados (Figura 1 e 2), caracterizando a perpetuidade das populações florestais conforme o avanço sucessional (MACHADO et al, 2017), por possuir indivíduos jovens em sua população. Para o grupo das intermediárias, a falta da descontinuidade ocorre pela soma dos indivíduos de todas as espécies nesse grupo, por classe diamétrica.…”

Section: E Reais (2007 E 2010) Para Os Grupos Ecológicos De Espécies unclassified

Prognosis of the diametric distribution of tree species with the transition matrix and movement ratio methods

Quadros

Gomes

2020

AGRO@MBIENTE ON-LINE

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Research is needed to subsidize foresters to manage the forest for better use of wood. To help in the research, analyzing the diameter distribution, the species can be grouped according to their characteristics concerning the diameter growth and projected their future growth, determining if they reached the expected diameter before the cutting cycle stipulated by law. The aim of the present research was to diametric distribution predict by a size class distribution method, by ecological groups. The study was carried out in Moju, PA. Nine clearings were selected, around which 4 sample plots of 10 x 50 m were installed, starting at the border of the clearing into the forest in the north, south, east and west directions. All individuals with DBH (diameter at breast height) ≥ 5 cm were measured. The species were grouped into tolerant, intermediate and intolerant regarding the demand for solar radiation. The methods tested were Transition Matrix and Moving Ratio, using data from 1998 and 2001 and making projections for 3 year periods (2007 and 2010). The efficiency of the projections was tested using the Kolgomorov-Smirnov adhesion test. The projections performed by the methods did not present a significant difference between the actual and projected values. Based on the results it is recommended to use the Transition Matrix for the prognosis of the diametrical distribution of individuals belonging to the group of tolerant and intermediate species and it is indicated to use both methods for intolerant species.

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Effects of urban ecosystem under the diversity and structure of two forest ecotones in Maranhão state

Santos,

Oda-Souza,

de Almeida

et al. 2023

Urban Ecosyst

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Forest ecotones are oristically rich but anthropogenic disturbances can differentiate their vegetation structure. This study evaluated the understory diversity of urban and nonurban forests in Maranhão. It tested the hypotheses that the understory of the nonurban forest has greater diversity and richness and that the spatial distribution of these variables in the understory of the urban forest has weak spatial dependence. The study was conducted in the municipalities of São Luís (urban area) and São José de Ribamar (nonurban area). Thirty plots (25m²) were demarcated and the woody individuals up to 2 m tall were measured. All phytosociological parameters were calculated. The differences in richness, density, and diversity were analyzed between the areas with the Mann-Whitney test, non-metric multidimensional scaling, and Hutcheson t-test. To visualize the variation in richness and diversity of the vegetation, ordinary kriging was used. There was a difference in the oristic composition and density of each species in the two areas; the richness and diversity were signi cantly greater in the nonurban area. The species with the highest IVs were Faramea nitida, Myrcia amazonica, and Ephedranthus pisocarpus in the nonurban forest and Protium heptaphyllum, Randia armata, and Moquilea tomentosa in the urban forest. Both understories had high diversity compared to other Amazonian regions. However, weak spatial dependence was found in the urban area, suggesting high anthropogenic interference in the environment. It is noteworthy that the areas represent a parcel of original ecotone vegetation in Maranhão and effective actions are needed to restore and conserve its diversity.

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Projeção da Estrutura Diamétrica de Grupos Ecológicos em uma Floresta Ombrófila Mista

Cited by 20 publications

References 26 publications

Behavior of the Diametric Distribution of Ecological Groups in a Mixed Ombrophilous Forest Fragment

Behavior of the Diametric Distribution of Ecological Groups in a Mixed Ombrophilous Forest Fragment

Prognosis of the diametric distribution of tree species with the transition matrix and movement ratio methods

Effects of urban ecosystem under the diversity and structure of two forest ecotones in Maranhão state

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