Manejo de florestas secundárias da Mata Atlântica para produção de madeira: possível e desejável

Fantini, Alfredo Celso; Siminski, Alexandre

doi:10.21713/2358-2332.2016.v13.1013

Cited by 9 publications

(16 citation statements)

References 20 publications

(22 reference statements)

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“…Home to two-thirds of Brazil's population [2] and exceptionally rich in biodiversity, it is the most threatened biome in Brazil [3]. The forest land area decreased to only 12% of its original extent [4], mainly as a result of intensive exploitation and conversion to other land-uses such as agriculture, plantation forests, and expanding urbanization [5]. Furthermore, most of the remaining Atlantic Forest is fragmented into small (less than 50 ha) and isolated forest patches, mainly covered with second growth forests [4,5] and owned by private landowners [1].…”

Section: Introductionmentioning

confidence: 99%

“…In Santa Catarina State, southern Brazil, secondary forests represent 95% of the remaining forest cover [6]. Virtually all of these forests regenerated naturally after the abandonment of land previously used for crop or pasture cultivation [5,7].…”

Section: Introductionmentioning

confidence: 99%

“…Conservation and management of the remaining forest ecosystem are currently largely conflicting goals in the biome [8]. Irrespective of size of forest patches, commercial logging is banned by forest regulations issued in 1993 and 2006, aiming at protecting the remnant forests from deforestation and degradation [5]. The effectiveness of such policy is, however, questionable.…”

Section: Introductionmentioning

confidence: 99%

“…The effectiveness of such policy is, however, questionable. Various researchers argued that sustainable management of secondary forests providing income opportunities would be more effective in increasing the willingness of land owners to conserve and possibly even expand the forest, favoring local development through income generation [3,5,[8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…However, although the Atlantic secondary forests may reach high productivity due to several fast growing species [8,11], only few studies have evaluated the utilization potential of these forests for timber production. Fantini and Siminski [5] estimated the amount of commercially mature trees at up to 300 trees per ha (diameter at breast height above 15 cm), corresponding to a harvestable timber volume of 30 million m 3 , within the approximately 6000 km 2 of secondary forests of the evergreen rainforests (ERF) of the Santa Catarina State alone. These authors also mention that secondary forests of the region can reach a volume of 50 m 3 ha −1 for mature trees of fast growing merchantable species by 30 to 35 years of age.…”

Section: Introductionmentioning

confidence: 99%

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Impact Assessment of Timber Harvesting Operations for Enhancing Sustainable Management in a Secondary Atlantic Forest

et al. 2019

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Conservation and management of forest ecosystems are currently largely conflicting goals in the Brazilian Atlantic Forest biome. At present, all parts of the Atlantic Forest are protected and commercial logging is highly restricted. However, sustainable forest management systems can offer significant income opportunities for landholders, and thereby actively support the process of ecosystem rehabilitation and protection of the Atlantic Forest. This research is intended to contribute to enhancing the development of environmentally sound forest management alternatives in the Atlantic Forest biome. Through a case study, the harvesting impact of a conventional harvesting method (CM) was evaluated and compared with an alternative and improved harvesting method (AM), performed by a well-trained professional chainsaw operator experienced in reduced impact logging techniques, and included the use of a snatch block and a skidding cone. Following a full pre-harvest inventory, 110 different tree species were identified. The harvesting impact on the residual stand was classified and evaluated through a successive post-harvest inventory. Damage maps were developed based on interpolation of tree damage intensities with the triangular irregular networks (TIN) methodology. Our results showed noticeable high rates of tree hang-ups, observed for both harvesting methods. Furthermore, the harvesting damaged trees mainly in the lower diameter at breast height (DBH) classes. In comparison to winching, the felling process caused most of the damage to remnant trees for both methods, at 87% (CM) and 88% (AM). The number of damaged trees (above 11.9 cm DBH) per harvested tree, for CM, ranged from 0.8 trees to 2.5 trees and, for AM, ranged from 0.6 trees to 2.2 trees. Improvements of the AM method (operator skills, skidding cone and snatch block) over CM allowed for a reduction of the damaged basal area, a reduction of the “high damaged area” per plot, and a reduction of the winching disturbed ground area. Nonetheless, a suitable harvesting system should consider further improvements in the felling technique, and additionally integrate the local knowledge of CM regarding forest and tree species with the technical improvements of AM.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact Assessment of Timber Harvesting Operations for Enhancing Sustainable Management in a Secondary Atlantic Forest

et al. 2019

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Multi-year, post-harvesting impact assessment in a neotropical secondary Atlantic Forest

et al. 2022

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Subject to overexploitation in the past centuries, the Atlantic Forest is subject to very rigorous protection rules. However, the law is a controversial issue since landowners are not compensated for the limited choice of land use possibilities. We believe that, alternatively to a general timber harvest ban, sustainable forest management of the Atlantic Forest has the potential to generate income for the landowners while sustaining important ecological functions of the forest. Such choice would require better understanding of the potential effects of timber harvesting on the forest ecosystem and on species composition and succession over time. In this context, we assessed the harvesting impact of a conventional harvesting method (CM) and compared it to an alternative harvesting method (AM) in three different stands (stands A, B and C) of a secondary forest fragment in southern Brazil. Results from three comprehensive forest inventories over a period of two years were used to assess the timber harvesting impact. Measurements of species composition (i.e., number of species, life form, ecological group), forest structure (i.e., density, basal area, DBH, volume) and saplings density formed the basis of the impact assessment. The inventories were carried out before, immediately after and two years after harvesting. Intensities of damage on remnant trees immediately after harvesting and two years after harvesting were also measured. Before harvesting, a total of 114 tree species (trees, tree fern and palm tree) belonging to 49 families were identified in the study site’s three research stands. Palm trees and secondary species, such as Euterpe edulis, represented the majority of recruited individuals (DBH ≥ 5 cm) two years after harvesting. However, new saplings (DBH ≤ 5 cm) after two years were mainly pioneer woody tree species, such as Cecropia glaziovii and Schizolobium parahyba. On average, AM reduced damage to saplings by 5%. Most of the damages caused by CM were moderate to severe, while AM caused light to moderate damages. Binary logistic regression indicated dependency of the mortality rates on the independent variables “stand, stem and leaning damages.” On the other hand, the recovery rates of damaged trees were dependent on crown, stem and leaning damages. Therefore, two years after harvesting a higher mortality rate of low-dimensional trees was observed in stands with high density of smaller trees and high density of improvement felling. Although crown damages were not related to mortality rates, high intensity of crown damages reduced recovery rates over time.

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Timber stock recovery in a chronosequence of secondary forests in Southern Brazil: Adding value to restored landscapes

Zambiazi

Fantini

Piotto

et al. 2021

Forest Ecology and Management

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Manejo de florestas secundárias da Mata Atlântica para produção de madeira: possível e desejável

Cited by 9 publications

References 20 publications

Impact Assessment of Timber Harvesting Operations for Enhancing Sustainable Management in a Secondary Atlantic Forest

Impact Assessment of Timber Harvesting Operations for Enhancing Sustainable Management in a Secondary Atlantic Forest

Multi-year, post-harvesting impact assessment in a neotropical secondary Atlantic Forest

Timber stock recovery in a chronosequence of secondary forests in Southern Brazil: Adding value to restored landscapes

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