Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon

Mazzei, Lucas; Sist, Plínio; Ruschel, Ademir Roberto; Putz, Francis E.; Marco, Phidias; Pena, Wagner; Ferreira, Josué A.

doi:10.1016/j.foreco.2009.10.031

Cited by 99 publications

(93 citation statements)

References 27 publications

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“…We applied a 1% mortality rate, which is consistent with studies of intact trees in logged and unlogged forest [21]. Several studies on the dynamics of neotropical forests report post-logging tree diameter growth varying from 2.5 to 6 mm year −1 [21][22][23]25,26]. In the absence of any post-logging silvicultural treatments, growth rates usually decrease with time.…”

Section: Recovery Of Timber Stocks After Loggingmentioning

confidence: 83%

“…Tree mortality during the first 2-5 years following logging is usually higher than in unlogged primary forest and generally results from the higher mortality rate of injured trees, particularly severely injured trees [21][22][23][24]. For this reason, our simulations did not include severely injured potential crop trees, since we considered that there was a high probability that these trees would die within the current felling cycle or develop defects that would be incompatible with future commercial use.…”

Section: Recovery Of Timber Stocks After Loggingmentioning

confidence: 99%

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The Contribution of Multiple Use Forest Management to Small Farmers’ Annual Incomes in the Eastern Amazon

Sist

Sablayrolles²,

Barthelon³

et al. 2014

Forests

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Small-scale farmers in the Brazilian Amazon collectively hold tenure over more than 12 million ha of permanent forest reserves, as required by the Forest Code. The trade-off between forest conservation and other land uses entails opportunity costs for them and for the country, which have not been sufficiently studied. We assessed the potential income generated by multiple use forest management for farmers and compared it to the income potentially derived from six other agricultural land uses. Income from the forest was from (i) logging, carried out by a logging company in partnership with farmers' associations; and (ii) harvesting the seeds of Carapa guianensis (local name andiroba) for the production of oil. We then compared the income generated by multiple-use forest management with the income from different types of agrarian systems. According to our calculations in this study, the mean annual economic benefits from multiple forest use are OPEN ACCESSForests 2014, 5 1509 the same as the least productive agrarian system, but only 25% of the annual income generated by the most productive system. Although the income generated by logging may be considered low when calculated on an annual basis and compared to incomes generated by agriculture, the one-time payment after logging is significant (US$5,800 to US$33,508) and could be used to implement more intensive and productive cropping systems such as planting black pepper. The income from forest management could also be used to establish permanent fields in deforested areas for highly productive annual crops using conservation agriculture techniques. These techniques are alternatives to the traditional land use based on periodic clearing of the forest. Nevertheless, the shift in current practices towards adoption of more sustainable conservation agriculture techniques will also require the technical and legal support of the State to help small farmers apply these alternatives, which aim to integrate forest management in sustainable agricultural production systems.

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Section: Recovery Of Timber Stocks After Loggingmentioning

confidence: 83%

Section: Recovery Of Timber Stocks After Loggingmentioning

confidence: 99%

The Contribution of Multiple Use Forest Management to Small Farmers’ Annual Incomes in the Eastern Amazon

Sist

Sablayrolles²,

Barthelon³

et al. 2014

Forests

Self Cite

View full text Add to dashboard Cite

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“…MAI is Mean Annual Increment (Mg C ha −1 year −1 ). Aboveground biomass increment (i.e., MAI) was reported to be about 1.30 Mg C ha −1 year −1 in Amazon forests (Mazzei et al, 2010), and 1.63 Mg C ha −1 year −1 in the northern Borneo (Berry et al, 2010). In a tropical wet forest in Nicaragua, it was estimated to be 2.68 Mg C ha −1 year −1 (Mascaro et al, 2005).…”

Section: Carbon Stocks For Each Logging Re-entrymentioning

confidence: 99%

Sustainable Management of Tropical Forests Can Reduce Carbon Emissions and Stabilize Timber Production

Sasaki

Asner

Pan

et al. 2016

Front. Environ. Sci.

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HIGHLIGHTS• About 500 million hectares of tropical forests have been degraded due primarily to overexploitation • Preventing premature re-entry into harvested areas can retain up to 34% of carbon stocks in the forests • Adoption of reduced-impact logging and wood processing technologies (RIL+) along with financial incentives can reduce forest fires, forest degradation, maintain timber production, and retain carbon stocks • About US$1.8 Mg CO −1 2 or US$2 billion year −1 is needed for the adoption of RIL+ for the whole tropical production forests.The REDD+ scheme of the United Nations Framework Convention on Climate Change has provided opportunities to manage tropical forests for timber production and carbon emission reductions. To determine the appropriate logging techniques, we analyzed potential timber production and carbon emission reductions under two logging techniques over a 40-year period of selective logging. We found that use of reduced-impact logging (RIL) techniques alone in tropical production forests (PdF) could reduce carbon emissions equivalent to 29-50% of net emissions from tropical deforestation and land use change, while also supplying 45% of global round-wood demand. Adopting RIL plus other improvements (RIL+) in forest management (adopting forest certification and DNA timber tracking to prevent illegal logging) and wood conversion practices (adopting technology to increase recovery of sawn wood), would result in increasing long-term carbon storage in sawn-wood and reduce logging-induced fire-prone wood wastes by 14-184%. For this to happen, about US$2 billion or $1.86 per Mg CO 2 in financial Sasaki et al. Sustainable Management of Tropical Forests incentives are needed annually for parties to adopt RIL+ and to prevent premature re-entry logging. Our findings suggest that future climate policies should explicitly include RIL+ to satisfy the "sustainable management of forests" proviso in the REDD+ scheme, and also count carbon in wood products as eligible credits for trading.

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“…Generally, the harvest planning process is carried out without considering ecological criteria thus contributing to increase the high ecological impacts on the managed forests, and consequent economic losses due to reduced remaining timber stocks (Hendrison 1990;Almeida 1996;Rocha et al 2007). It is estimated that the major cause of forest degradation in the tropics is unplanned selective logging (Mazzei et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Optimal selective logging regime and log landing location models: a case study in the Amazon forest

et al. 2018

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Reduced-impact logging is a well known practice applied in most sustainable forest management plans in the Amazon. Nevertheless, there are still ways to improve the operational planning process. Therefore, the aim of this study was to create an integer linear programming (ILP) to fill in the knowledge gaps in the decision support system of reduced impact logging explorations. The minimization of harvest tree distance to wood log landing was assessed. Forest structure aspects, income and wood production were set in the model, as well as the adjacency constraints. Data are from a dense ombrophylous forest in the western Brazilian Amazon. We applied the phytosociological analysis and BDq method to define the selective logging criteria. Then, ILP models were formulated to allow the application of the constraints. Finally, 32 scenarios (unbalanced forest, UF, and balanced forest, BF) were generated and compared with real executed plans (RE). Robust results were achieved and the expected finding of each scenario was met. The feasibility to integrate ILP models in uneven-aged forest management projects was endorsed. Consequently, the UF and BF scenarios tested were efficient and concise, introducing new advances for forest management plans in the Amazon. The proposed models have a high potential to improve the selective logging activities in the Amazon forest.KEYWORDS: forest planning, reduced-impact logging, integer linear programming, sustainable forest management, Liocourt quocient Regime de corte seletivo ótimo em modelos de locação de pátios de estocagem de madeira: um estudo de caso na floresta amazônica RESUMO A exploração de impacto reduzido é uma prática bem conhecida e aplicada na maioria dos planos de manejo florestal sustentável na Amazônia. Todavia, ainda há a possibilidade de melhoria do processo de planejamento da operação. Diante da falta de métodos auxiliares à tomada de decisão, o objetivo do trabalho foi desenvolver modelos de programação linear inteira (PLI) para suprir esta demanda. Considerou-se a minimização da distância entre as árvores exploradas e os pátios de estocagem de madeira. Aspectos estruturais, econômicos e produtivos foram incorporados ao modelo, bem como restrições de adjacência. Os dados derivam de uma floresta ombrófila densa na Amazônia Ocidental. Previamente, utilizou-se uma análise fitossociológica e o método BDq como critério de remoção. Posteriormente, modelos de PLI foram formulados para exemplificar as aplicações. Finalmente, 32 cenários (para floresta desbalaceada, UF, e floresta balanceada, BF) foram gerados e comparados com o plano executado no campo (RE). Resultados robustos foram obtidos e atenderam às expectativas de cada cenário. A viabilidade da integração dos modelos de PLI em projetos de manejo de florestas ineqüiâneas foi testado. Os cenários UF e BF testados foram eficientes e concisos, confirmando seu potencial para aumentar a eficiência de planos de exploração madeireira e manejo florestal na Amazônia.

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Above-ground biomass dynamics after reduced-impact logging in the Eastern Amazon

Cited by 99 publications

References 27 publications

The Contribution of Multiple Use Forest Management to Small Farmers’ Annual Incomes in the Eastern Amazon

The Contribution of Multiple Use Forest Management to Small Farmers’ Annual Incomes in the Eastern Amazon

Sustainable Management of Tropical Forests Can Reduce Carbon Emissions and Stabilize Timber Production

Optimal selective logging regime and log landing location models: a case study in the Amazon forest

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