Canopy Architecture After Selective Logging in a Secondary Atlantic Rainforest in Brazil

Silva, Daniel Augusto da; Vibrans, Alexander Christian

doi:10.1590/2179-8087.037418

Cited by 6 publications

(8 citation statements)

References 28 publications

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“…To avoid the effect of sunlight anisotropy and scattering fluxes on the digital image, captures were taken on cloudy days or early in the morning on sunny days (Gonsamo;Pellikka, 2009). The capture of the photographs followed the methodology adapted from Macfarlane et al (2014) and described by Silva and Vibrans (2019).…”

Section: Experimental Designmentioning

confidence: 99%

“…Its wood has a basic density of 664.5 kg.m-3 (Oliveira et al, 2019) and reaches prices of up to R$ 1,200.00 (around US$ 300,00) per m³ sawnwood in the local market (personal research). As an early secondary species, licurana is abundant in initial stages of succession, in the entire evergreen rainforest in Santa Catarina, sometimes dominating these forests (Siminski et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Canopy recovery four years after logging: a management study in a southern brazilian secondary forest

Likoski

Vibrans

Silva

et al. 2021

CERNE

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Background: Understanding forest dynamics after logging is essential to define forest management cycles and intensities. In secondary forest, especially in the Atlantic Forest Domain, these studies are still scarce. Monitoring of the canopy structure after tree harvesting can be performed by hemispherical photographs, where canopy opening is commonly analyzed. This study evaluated changes in canopy opening four years after tree harvesting in a secondary Atlantic Rainforest in southern Brazil. We used hemispherical photographs to determine the Canopy Openness (CO), Leaf Area Index (LAI), and Diffuse Fraction of Photosynthetically Active Absorbed Radiation (FAPAR dif ) in eleven permanent plots. Results:We found that harvesting resulted in a momentary increase in canopy opening and light availability in the understory. Four years after harvesting, CO, LAI and FAPAR dif recovered or even exceeded the original values of the forest. We observed a significant correlation between CO and number of trees harvested with DBH > 30 cm. Weak correlations were found between these canopy related variables and the logging intensity. Conclusion:In conclusion, we recognized that changes of CO, LAI and FAPAR dif after timber harvesting presented short duration. This indicates that the applied logging intensities, 21.8 to 51.1% of the total basal area, did not exceed the resilience of the forest canopy and it's recovering four years later. However, additional studies should be carried out to observe vegetation dynamics, such as species composition, vertical structure, productivity and community stability, in order to improve management schemes of secondary stands in the Atlantic Forest.

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Section: Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Canopy recovery four years after logging: a management study in a southern brazilian secondary forest

Likoski

Vibrans

Silva

et al. 2021

CERNE

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“…The present study is part of a comprehensive research currently under development in the Atlantic Forest biome. Previous studies in the same research area have already investigated the economic potential of secondary Atlantic Forests (Fantini et al 2019;Fantini and Siminski 2017;Trevisan et al 2016;Zambiazi et al 2021), volumetric models and aboveground biomass (Oliveira et al 2018;Uller et al 2021Uller et al , 2019; regeneration of woody species (Piazza et al 2017); as well as productivity and costs of timber harvesting operations (Britto et al 2017), harvesting impacts caused by forest management (Britto et al 2019;Bulfe et al 2009;Ruy et al 2014;Silva et al 2018) and impacts on canopy architecture after logging (Silva & Vibrans 2019).…”

Section: Introductionmentioning

confidence: 99%

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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“…However, this Biome has a widespread devastation scenario in which most remaining forests are small isolated fragments and under intense anthropic pressure (Callaghan et al, 2019;Liebsch et al, 2016). Considering the anthropic pressures, selective logging has a major impact on these forests (Brocardo et al, 2018;Cunha et al, 2021;Eisenlohr et al, 2015;Lammertink et al, 2020;Rutishauser et al, 2016;Silva & Vibrans, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Studies have used the population structure as a way to understand effects of natural (Batista & Platt, 2003;Coomes & Allen, 2007) and anthropic disturbances on species (Liebsch et al, 2021;Sapkota et al, 2009;Silva & Vibrans, 2019;Souza, Research, Society and Development, v. 10, n. 11, e487101119897, 2021 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v10i11.19897 3 2007; Tsingalia, 2010). A higher proportion of juveniles than adult trees has been found in exploited forests (Souza, 2007) and the spatial pattern may change between exploited and unexploited forests (Sapkota et al, 2009) considering that gap recruitment has been shown to be important for individual tree placement (Plotkin et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Population structure of understory, canopy/emergent tree species in Brazilian Atlantic Forest remnants with different Conservation status

Bovolenta¹,

Rodrigues

Bianchini

et al. 2021

RSD

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The size and spatial structures of populations are a synthesis of demographic attributes and indicators of competitive ability, colonization, and survival. In this study, the objective was to analyze the height and spatial pattern of an understory and canopy/emergent tree populations group in two protected fragments of seasonal semideciduous forest, one with a history of selective logging and another without selective logging evidences. Six species with high importance values (IV) from different guilds were selected and height and spatial pattern analysis was realized in both areas. Then, comparison of results was realized in an area with history of selective logging and another without selective logging evidences. Differences in height and spatial pattern were found between the two areas, including species not directly exploited. In Logged Forest the size structure for all species presented a higher coefficient of skewness, showing a greater proportion of young trees. Random distribution was observed for the majority of species in both areas. Some emergent/canopy species had a deficit of individuals in the largest size classes and the majority of understory species showed more individuals in Logged Forest. Selective Logging changed the pattern of populations. Selecting species based on IV together with spatial patterns data contribute to demonstrating the impacts of exploitation. The Logged Forest is surrounded by an agricultural matrix, limiting arrival and dispersion of propagules of shade-tolerant species. Efforts to connect surroundings fragments to Logged Forest will be necessary.

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Canopy Architecture After Selective Logging in a Secondary Atlantic Rainforest in Brazil

Cited by 6 publications

References 28 publications

Canopy recovery four years after logging: a management study in a southern brazilian secondary forest

Canopy recovery four years after logging: a management study in a southern brazilian secondary forest

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

Population structure of understory, canopy/emergent tree species in Brazilian Atlantic Forest remnants with different Conservation status

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