Liberation: Acceptable production of tropical forest timber

Wadsworth, Frank H.; Zweede, J.

doi:10.1016/j.foreco.2006.05.072

Cited by 96 publications

(78 citation statements)

References 2 publications

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“…Liberation treat ments might include mechanical girdling and/or killing with herbicides of non-com mercial trees that overtop future crop trees, plus vine cutting to accelerate the recruit ment and growth of trees that have the capa city to grow to be large. Such treatments can accelerate average tree growth by 9-27% for all tree species, and by 50-60% for future crop trees (Peña-Claros et al 2008, Villegas et al 2009); application of such treatments to a selectively logged forest in Amazonian Brazil doubled the annual rate of aboveground biomass recovery from 0.16 to 0.33 Mg C ha -1 yr -1 (see SM for calculations) du ring at least the initial 6 years following log ging (Wadsworth & Zweede 2006). It is im portant to note, however, that in Indonesia, the benefits of RIL for the residual stand dis appeared where the logging intensity was > 8 trees ha -1 (Sist et al 2003).…”

Section: Restoring Slightly Degraded Forest (Sdf P0 To a To Pa)mentioning

confidence: 99%

“…For example, the switch from excessively de structive to reduced-impact logging re portedly ranges from having slight negative (Tay et al 2002) to large positive effects on profits from timber harvesting (Holmes et al 2002). Depending on geographical location, season, and equipment, costs for liberation treatments by girdling of unwanted trees are likewise modest; in Bolivia they were estim ated at US$ 0.21-1.04 per tree or about US$ 5.08-25.17 ha -1 (Ohlson-Kiehn et al 2006; this assumes girdling of 24.2 competing trees ha -1 on average, based on Wadsworth & Zweede 2006). The costs of restoration using assisted natural regeneration techniques are far less than enrichment planting and other conventional plantation development tech niques because the costs of propagating, rai sing, and planting seedlings are avoided (Ganz & Durst 2003, Shono et al 2007a.…”

Section: Making These Strategies Workmentioning

confidence: 99%

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Approaches to classifying and restoring degraded tropical forests for the anticipated REDD+ climate change mitigation mechanism

Sasaki¹,

Asner²,

Knorr³

et al. 2011

iForest

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Inclusion of improved forest management as a way to enhance carbon sinks in the Copenhagen Accord of the United Nations Framework Convention on Climate Change (December 2009) suggests that forest restoration will play a role in global climate change mitigation under the post-Kyoto agreement. Although discussions about restoration strategies often pertain solely to severely degraded tropical forests and invoke only the enrichment planting option, different approaches to restoration are needed to counter the full range of degrees of degradation. We propose approaches for restoration of forests that range from being slightly to severely degraded. Our methods start with ceasing the causes of degradation and letting forests regenerate on their own, progress through active management of natural regeneration in degraded areas to accelerate tree regeneration and growth, and finally include the stage of degradation at which re-planting is necessary. We argue that when the appropriate techniques are employed, forest restoration is cost-effective relative to conventional planting, provides abundant social and ecological co-benefits, and results in the sequestration of substantial amounts of carbon. For forest restoration efforts to succeed, a supportive post-Kyoto agreement is needed as well as appropriate national policies, institutional arrangements, and local participation

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Section: Restoring Slightly Degraded Forest (Sdf P0 To a To Pa)mentioning

confidence: 99%

Section: Making These Strategies Workmentioning

confidence: 99%

Approaches to classifying and restoring degraded tropical forests for the anticipated REDD+ climate change mitigation mechanism

Sasaki¹,

Asner²,

Knorr³

et al. 2011

iForest

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show abstract

“…For example, for a few dollars per hectare, the growth rates of trees that sequester large amounts of carbon and hold carbon for a long time can often be doubled by clearing vines and overtopping less enduring trees that compete with them (Wadsworth and Zweede 2006;Villegas et al 2009). Restoring more degraded stands, by assisting natural regeneration is low in cost and often results in substantial gains in terms of carbon and biodiversity (Dugan et al 2003).…”

Section: Develop Incentives To Enhance Carbon Stocks In Logged Burnementioning

confidence: 99%

Realising REDD+: national strategy and policy options

Angelsen¹,

Brockhaus²,

Kanninen³

et al. 2009

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“…Studies that were conducted in the tropical forests have revealed that silvicultural treatments performed after logging may significantly increase the growth rates (WADSWORTH; ZWEEDE, 2006;PEÑA-CLAROS et al, 2008;VILLEGAS et al, 2009). Silva (2001) affirms that the growth rate of individuals that received silvicultural treatments may double compared to the logged and not consequently treated forest areas, or even quadruplicate compared to the unlogged forest.…”

Section: Introductionmentioning

confidence: 99%

GROWTH OF Manilkara huberi AND Manilkara paraensis AFTER LOGGING AND SILVICULTURAL TREATMENTS IN THE MUNICIPALITY OF PARAGOMINAS, PARÁ, BRAZIL

Souza

Carvalho

Mendes

et al. 2014

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The effects of silvicultural treatments and logging on the growth rates of Manilkara huberi and Manilkara paraensis in a terra firme natural forest were evaluated. The study was performed in a Forest Management Unit (FMU) located in the municipality of Paragominas, PA. The experimental area covered 500 ha, where five treatments (100 ha each), with four replications per treatment (25 ha each), were established. The replications were randomly distributed in the 500 ha sample area of the FMU. The growth rate of trees was evaluated in the following treatments: T1 -Reduced Impact Logging (RIL) + classic liberation thinning and climber cutting; T2 -RIL + modified liberation thinning and climber cutting; T3 -RIL + climber cutting; T6 -only RIL; T7 -unlogged forest (control). Manilkara huberi and Manilkara paraensis showed good responses on diameter growth rate to the post-harvesting silvicultural treatments applied. However, considering the growth rate differences between the evaluated periods, one can say that the short time elapsed from the application of silvicultural treatments (four years) to the end of the study period does not allow to make accurate statements about the most appropriate treatment for the species, or about the intensity of the interventions to be applied. Keywords: Diameter increment; post-harvesting silviculture; tree girdling; climber cutting. ResumoCrescimento de Manilkara huberi e Manilkara paraensis após a colheita de madeira e tratamentos silviculturais, paragominas, Pará, Brasil. Foram avaliados os efeitos de tratamentos silviculturais e da colheita de madeira sobre o crescimento diamétrico das espécies Manilkara huberi e Manilkara paraensis em uma floresta natural de terra firme. A pesquisa foi conduzida em uma Unidade de Manejo Florestal (UMF), município de Paragominas, PA. A área experimental correspondeu a 500 ha, onde foram estabelecidos cinco tratamentos (100 ha cada) com quatro repetições (25 ha cada). As repetições foram distribuídas aleatoriamente na amostra de 500 ha na UMF. O crescimento das árvores foi avaliado nos seguintes tratamentos: T1 -exploração de impacto reduzido (EIR) + desbaste de liberação clássico e corte de cipós; T2 -EIR + desbaste de liberação modificado e corte de cipós; T3 -EIR + corte de cipós; T6 -apenas EIR; T7 -floresta não-explorada. Manilkara huberi e Manilkara paraensis mostraram respostas favoráveis, em termos de crescimento em diâmetro, às intervenções silviculturais pós-exploratórias aplicadas. Contudo, considerando as diferenças no incremento das árvores entre os períodos avaliados, pode-se dizer que o curto espaço de tempo decorrido da aplicação dos tratamentos silviculturais (quatro anos) ainda não permite fazer projeções precisas acerca do tratamento mais adequado às espécies, ou mesmo, da intensidade das intervenções a serem aplicadas. Palavras-chave: Incremento diamétrico; silvicultura pós-colheita; anelagem de árvores, corte de cipós.

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Liberation: Acceptable production of tropical forest timber

Cited by 96 publications

References 2 publications

Approaches to classifying and restoring degraded tropical forests for the anticipated REDD+ climate change mitigation mechanism

Approaches to classifying and restoring degraded tropical forests for the anticipated REDD+ climate change mitigation mechanism

Realising REDD+: national strategy and policy options

GROWTH OF Manilkara huberi AND Manilkara paraensis AFTER LOGGING AND SILVICULTURAL TREATMENTS IN THE MUNICIPALITY OF PARAGOMINAS, PARÁ, BRAZIL

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