Estrutura fitossociológica, estoques de volume, biomassa, carbono e dióxido de carbono em Floresta Estacional Semidecidual

Souza, Agostinho Lopes de; Boina, Aline; Soares, Carlos Pedro Boëchat; Vital, Benedito Rocha; Gaspar, Ricardo de Oliveira; Lana, Jacinto Moreira de

doi:10.1590/s0100-67622012000100018

Cited by 16 publications

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“…Tree recruitment for this species was 255 stems ha -1 while mortality was 82 stems ha -1 . This predominance of non-pioneer species in the forest fragment mainly occurred due to the successional advance (Souza et al, 2012). Therefore, it is presumed that there is a reduction of luminosity due to the tree canopy, which suppressed shade intolerant species and benefited recruitment of ombrophil species (Chazdon, 2012).…”

Section: Discussionmentioning

confidence: 99%

Prognosis of the Diameter Distribution and Carbon Stock in a Secondary Atlantic Forest by Markov Chain

et al. 2018

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Growth and yield modeling at the diameter distribution level is an important tool to understand forest dynamics and to predict whether a forest will act as a CO2 emissions source or sink. Therefore, the objective of the present study was to determine the diameter distribution and carbon stock of a forest fragment using the Markov chain to evaluate the impact of growth dynamics on forest carbon capture. Twenty plots of 10x50m were inventoried, between 2010 and 2015, counting the stems with dbh > 5 cm. Diameter distribution was projected for 2015 and 2020, considering the whole fragment and the ecological groups (pioneer and non-pioneer tree species). The volume was determined using allometric equation while biomass and carbon was determined by multiplying the volume by the basic wood density and the carbon content, respectively. The diameter distribution estimated for the fragment and ecological groups did not differ statistically from the values observed using the Kolmogorov-Smirnov test (p-value < 0.05). The number of stems ha-1 estimated in the fragment was from 1,692 in 2015 to 1,841 in 2020. For the pioneer and non-pioneer species, the number of stems ha-1 was from 476 and 1,203 in 2015 to 472 and 1,362 in 2020, respectively. The carbon stock increased 5.69 MgC ha-1, with the greater contribution coming from the non-pioneer species. Therefore, it was concluded that the diameter distribution would remain “J-inverted” and the forest fragment would continue to act as a carbon sink over the coming years.

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Section: Discussionmentioning

confidence: 99%

Prognosis of the Diameter Distribution and Carbon Stock in a Secondary Atlantic Forest by Markov Chain

et al. 2018

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“…In an advanced succession area, the authors found an IPA C of 1.19 t ha -1 year -1 over a period of five years. Souza et al (2012b) obtained an IPA C of 0.77 t ha -1 year -1 (five-year period) in a seasonal semideciduous forest in advanced middle-stage succession in eastern Minas Gerais.…”

Section: Speciesmentioning

confidence: 98%

“…It presents great floristic diversity and has been a constant target of deforestation, with only around 4% of its original forest cover remaining (Brasil, 2007). Despite its ecological importance, few studies have attempted to quantify the carbon stock in this physiognomy (Scolforo et al, 2008a;Ribeiro et al, 2009;Souza et al, 2012b;Amaro et al, 2013;Torres et al, 2013;Carvalho et al, 2014;Gaspar et al, 2014;Figueiredo et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Biomass and Carbon in a Seasonal Semideciduous Forest in Minas Gerais

et al. 2018

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The objective of the present study was to quantify the biomass and carbon stock in a Seasonal Semideciduous Forest remnant in southern Minas Gerais. Forest inventory data taken between 2010 and 2013 in permanent plots, was used to estimate biomass with an allometric equation. Basic wood density (Db) and carbon content were determined in the laboratory and the carbon stock was obtained by multiplying biomass by carbon content. The species with the lowest and highest Db were Nectandra lanceolata (0.38 g cm-3) and Machaerium villosum (0.77 g cm-3). The species that showed the lowest and highest carbon content values were Casearia decandra (41.85%) and Nectandra oppositifolia (46.57%). The biomass stock for the area was 126.92 ± 0.09 t ha-1 , which corresponded to 55.91 ± 0.05 t ha-1 of carbon stock and a periodic annual increment of 3.07 t ha-1 year-1 .

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“…Nesse contexto, as florestas exercem um papel importante no ciclo de carbono, onde a estocagem e sequestro do mesmo estão relacionados com as espécies, manejo dos plantios e a sucessão em florestas nativas (WATZLAWICK et al, 2011;SOUZA et al, 2012).…”

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AJUSTE SIMULTÂNEO NA PREDIÇÃO DE BIOMASSA AÉREA EM Araucaria angustifolia (Bertol.) Kuntze

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RESUMOAtualmente a estimativa da biomassa é feita de forma independente para cada compartimento da árvore, entretanto estudos mostram a importância do ajuste simultâneo para garantir a melhor predição da biomassa por compartimento e total. O estudo teve como objetivo desenvolver modelos alométricos por compartimento e utilizar o ajuste simultâneo de equações para a predição da biomassa da copa, fuste e aérea de Araucaria angustifolia. Foram mensurados diâmetro (dap), altura (ht), densidade básica da madeira (ρ) e, pelo método destrutivo, a biomassa verde da copa e fuste. Amostras foram tomadas para a determinação da biomassa seca. Foi realizada correlação de Pearson (5%) entre as variáveis e testados 10 modelos para a estimativa da biomassa seca dos compartimentos. Os critérios de seleção dos modelos compreenderam R²aj, Syx%, AIC, testes de BreuschPagan, Shapiro-Wilk e Durbin-Watson. Após a escolha do melhor modelo foi aplicada a Distância Cook para retirada dos valores outliers. O modelo logaritimizado de dupla entrada (dap e ht) apresentou melhor desempenho para a biomassa da copa e o modelo de tripla entrada (dap, ht e ρ) para a biomassa do fuste e aérea. A retirada dos valores outliers melhorou as estatísticas de ajuste dos modelos. A aplicação do ajuste simultâneo representou melhora na estimativa da biomassa por garantir a aditividade dos componentes na predição da biomassa total. O uso do dap é importante na estimativa da biomassa do fuste, contudo, deve-se buscar outras variáveis que melhor se relacionem com a biomassa da copa, também podendo melhorar as estimativas com o uso do ajuste simultâneo. PALAVRAS-CHAVE: Alometria, Equações simultâneas, Modelagem florestal. ABSTRACTNowadays the biomass estimation is done independently for each compartment of the tree, however studies show the importance of the simultaneous adjustment to ensure a better prediction of biomass per compartment and total. The objective of the study was to develop allometric models per compartment and use the simultaneous adjustment of equations for the prediction of tree top, stem and above ground biomass of Araucaria angustifolia. It was measured diameter (dbh), height (ht), wood basic density (ρ) and, by the destructive method, the green biomass of canopy and stem. Samples were taken for determination of dry biomass. Pearson correlation analysis (5%) was performed between the variables and 10 models were tested for estimation of the dry biomass of compartments. The selection criteria of the models included R²aj, Syx%, AIC, Breusch-Pagan, Shapiro-Wilk and Durbin-Watson tests. After choosing the best model, the Cook Distance was applied to remove the outliers values. The logarithmic double input model (dbh and ht) presented the best performance for canopy biomass and the logarithmic triple entry model (dbh, ht and ρ) for the stem and above-ground biomass. The removal of the outliers values improved the adjustment statistics of the models. The application of the simultaneous adjustment represented an improvement in the biomass estimat...

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Estrutura fitossociológica, estoques de volume, biomassa, carbono e dióxido de carbono em Floresta Estacional Semidecidual

Abstract: PHYTOSOCIOLOGICAL STRUCTURE, VOLUME STOCKS, BIOMASS, CARBON AND CARBON DIOXIDE IN SEASONAL SEMIDECIDUOS FOREST

Cited by 16 publications

References 14 publications

Prognosis of the Diameter Distribution and Carbon Stock in a Secondary Atlantic Forest by Markov Chain

Prognosis of the Diameter Distribution and Carbon Stock in a Secondary Atlantic Forest by Markov Chain

Biomass and Carbon in a Seasonal Semideciduous Forest in Minas Gerais

AJUSTE SIMULTÂNEO NA PREDIÇÃO DE BIOMASSA AÉREA EM Araucaria angustifolia (Bertol.) Kuntze

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