Determinants of profit in sustainable forest management in the Brazilian Amazon

Ângelo, Humberto; Almeida, Alexandre Nascimento de; Matricardi, Eraldo Aparecido Trondoli; Rosetti, Carlos Francisco; Gaspar, Ricardo de Oliveira; Miguel, Éder Pereira; Vasconcelos, Pedro Guilherme de Andrade

doi:10.5897/ajar2016.11764

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…Brazil encompasses approximately 60% of the Amazon forest and is third in global tropical timber production (ITTO, 2019), but does not sustainably manage its Amazon forests. Minimal SFMPs are underway across 25% of the Amazon forest area managed for timber production (Blaser, 2011;Humberto et al, 2016;INPE, 2019). Typical SFMPs include reduced-impact selective logging operations to harvest a selective number of marketable tree species possessing high wood value from primary forests (17-20 m 3 ha − 1 yr − 1 of 38-70 species; Dykstra et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Litter and soil biogeochemical parameters as indicators of sustainable logging in Central Amazonia

Bomfim

Silva

Pereira

et al. 2020

Science of The Total Environment

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One-fourth of Brazilian Amazonia is managed for timber production, but only a few logging sites follow sustainable forest management plans (SFMPs). Amazon forests without SFMPs are susceptible to deforestation because such plans integrate the use of forest products and conservation goals by allowing selective wood extraction following regulations. It remains uncertain whether reduced-impact selective logging (17-20 m 3 ha − 1 yr − 1 of 38-70 species), typical of SFMPs, changes forest regeneration, carbon (C) stocks, and nutrient cycling. Here, we tested the hypothesis that litter and soil biogeochemical parameters serve as indicators of sustainable logging as forest regeneration, C stocks, and C-to-nutrient ratios in soil and litter become similar to those in primary forests as time elapses after logging. We used a chronosequence spanning nine years since logging to relate litter and soil (0-10, 10-30, 30-50 cm) C stocks and 12 and 15 biogeochemical parameters, respectively, canopy cover and tree seedling density (10-150 cm tall) in sustainably managed upland evergreen Amazon forests. In one unlogged and four logged stands sampled three, five, seven, and nine years after logging, we compared 15 permanent plots (three replicated 0.5 ha plots per time-since-logging category). Five biogeochemical parameters explained >80% of the variation in soil and litter among logged and unlogged stands. Litter parameters were more sensitive to logging than soil parameters, where litter C stocks and C-to-nutrient ratios increased systematically after logging. Canopy cover decreased over time and was~14% lower nine years after logging. Total seedling density did not change consistently over time but was~54% higher seven years after logging. Our data suggest that the SFMP guidelines have served the purpose of maintaining soil quality and forest regeneration. Litter and soil parameters can be useful indicators of sustainable forest management in upland evergreen forests in Central Amazonia.

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Section: Introductionmentioning

confidence: 99%

Litter and soil biogeochemical parameters as indicators of sustainable logging in Central Amazonia

Bomfim

Silva

Pereira

et al. 2020

Science of The Total Environment

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Avaliação do processo de secagem ao ar livre da madeira de jatobá na Amazônia

Moretti

Santos

Mascarenhas

et al. 2020

RSD

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Objetivou-se avaliar o processo de secagem da madeira de jatobá (Hymenaea courbaril L.) ao ar livre. Para determinar a umidade inicial da madeira confeccionaram-se amostras das extremidades de tábuas. Para o acompanhamento da umidade da madeira utilizou-se quatro amostras controle, distribuídas de forma sistemática na pilha de madeira construída com dimensões de 150 cm x 25 cm x 85 cm (comprimento x altura x largura). O acompanhamento foi realizado entre outubro e novembro, este período foi definido com base no tempo médio entre a estocagem da madeira e sua comercialização nas serrarias da região. Na madeira verde, observou-se umidade inicial média de 50,02% e ao final do período de avaliação (46 dias) as peças estavam com 13,75% de umidade. Em relação as taxas de secagem, os maiores valores foram encontrados para a madeira com umidade acima de 30%, resultado esperado devido a fácil movimentação da água livre presente no lume. Foram observados os seguintes defeitos: encurvamento; torcimento; arqueamento em ordem de maior intensidade de defeitos por peça. Apresentaram ainda, rachaduras de topo e superfície, sendo 93,33% de topo, e as de superfície foram avaliadas apenas em quantidade de rachaduras por peça, nas quais 33,33% não foram observadas este defeito. Os resultados obtidos no estudo são ferramentas que contribuem para o planejamento da secagem ao ar livre na madeira de jatobá.

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Determinants of profit in sustainable forest management in the Brazilian Amazon

Cited by 2 publications

References 12 publications

Litter and soil biogeochemical parameters as indicators of sustainable logging in Central Amazonia

Litter and soil biogeochemical parameters as indicators of sustainable logging in Central Amazonia

Avaliação do processo de secagem ao ar livre da madeira de jatobá na Amazônia

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