Dendroecology Applied to Silvicultural Management in the Southern Patagonian Forests: A Case Study from an Experimental Forest in Tierra del Fuego, Argentina

Mundo, Ignacio A.; Palazzini, Dino A.; Barotto, Antonio José; Martinez-Pastur, Guillermo; Barrera, Marcelo Daniel

doi:10.1007/978-3-030-36930-9_14

Cited by 3 publications

(6 citation statements)

References 26 publications

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“…Additionally, the evaluation of the effects by statistical analysis and interpretation of graphs seems to be more sensitive when BAI is applied. The present findings are consistent with those of Mundo et al (2020), who conducted a study at the same site but applied only HT and its subtreatments. In the present work, the study was expanded with the incorporation of a new intervention and the remaining treatments, comparing systematic and non-systematic interventions.…”

Section: Discussionsupporting

confidence: 92%

“…In the present work, the study was expanded with the incorporation of a new intervention and the remaining treatments, comparing systematic and non-systematic interventions. The mean intercorrelation values obtained are similar to those presented by Mundo et al (2020), highlighting the increase of these values as the interventions elapse. These values indicate that thinning produces a homogeneous growth effect among the remaining trees in the stand, a condition that can be modified when competition for resources increases.…”

Section: Discussionsupporting

confidence: 80%

“…In 1984, IFONA carried out different commercial thinning systems on harvested strips. The regeneration presented forests of approximately 2 meters of height, 2.5 cm DBH, and a tree density of 80,000 -100,000 ind ha -1 (Mundo et al 2020). These start-up trials were applied at one per strip without replications (selective or systematic cuttings): (i) heavy thinning from below (HT), (ii) light thinning from below (LT), (iii) extraction of competitors through selection thinning (S), (iv) 2 meter strips parallel to the mother strips (longitudinal strips, LS), (v) 2 meters strips perpendicular to the mother strips (transverse strips, TS), and (vi) checkerboards (with parallel and perpendicular strips every 2 meters, D) (figure 1).…”

Section: Methodsmentioning

confidence: 99%

“…However, several theoretical proposals (e.g. Schmidt and Urzúa 1982, Uriarte and Groose 1991) and a few long-term studies were carried out to improve and manage lenga secondary forests (Martínez Pastur et al 2001, 2013, Contreras 2004, Mundo et al 2020. Several advantages and trade-offs were identified for thinning practices.…”

Section: Introductionmentioning

confidence: 99%

“…Oerst. (guindo, coihue de Magallanes), and Mundo et al (2020) researched the effects of two thinning levels in secondary lenga forests.…”

Section: Introductionmentioning

confidence: 99%

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Radial growth response to long-term thinning strategies in Nothofagus pumilio forests of Tierra del Fuego

et al. 2023

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New silvicultural proposals based on long-term trials are needed to develop forest management strategies. Radial growth response was the preferred proxy for managers to define thinning levels and best years for intervention. We analyzed long-term thinning strategies in secondary Nothofagus pumilio forests (55 years old) in Tierra del Fuego (Argentina) to determine and quantify the effect on radial growth. Samplings were conducted in a trial area established in 1965 where three interventions (17, 33 and 44 years after harvesting) with different thinning strategies were applied. We employed dendrochronological techniques to measure and co-date ring widths, comparing 19 different thinning strategies (n = 100 slices x 2 reading sections). Average ring width (RW), basal area increment (BAI), and periodic annual increment every five years (PAI 5 ) were calculated and compared through univariate comparisons. Radial growth responses were directly related to thinning intensity; however, a differential response was found according to thinning strategy (e.g. selective and systematic cuttings) and always significantly higher than the control (3 vs. 1 mm year -1 ). The maximum growth occurred between 2 and 4 years after thinning (YAT), and progressively decreased until reaching pre-cutting levels (5 to 8 YAT). The analyses of the thinning strategies showed that initial systematic thinning followed by at least light thinning when growth rates recover their pre-intervention values is the most convenient combination of intermediate treatments for Nothofagus pumilio forests. These results can contribute to better silvicultural decision-making in secondary forests and provide information to analyze the feasibility of their implementation.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Oerst. (guindo, coihue de Magallanes), and Mundo et al (2020) researched the effects of two thinning levels in secondary lenga forests.…”

Section: Introductionmentioning

confidence: 99%

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Radial growth response to long-term thinning strategies in Nothofagus pumilio forests of Tierra del Fuego

et al. 2023

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Summer temperature changes in Tierra del Fuego since AD 1765: atmospheric drivers and tree-ring reconstruction from the southernmost forests of the world

et al. 2022

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Silviculture of South American temperate native forests

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et al. 2022

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Background: South America has the largest area of temperate forests in the Southern Hemisphere, which grow in diverse site conditions. The aim of this paper is to review the practices of silviculture applied and recommended for these temperate forests, and to discuss prospects to develop new silvicultural proposals to improve sustainability, adaptation and in-situ conservation of forest ecosystems. Methods: We reviewed the silviculture knowledge in four major forest types: 1) The Nothofagus-dominated forests of south-central Chile; 2) the Angiosperm-dominated evergreen forests; 3) the Nothofagus and Austrocedrus chilensis (D.Don) Pic. Serm. & Bizzarri forests in the Argentinean Northern Patagonia; and 4) the Cool temperate Nothofagus forests and Magellanic rainforests. Results: In Chile, both Nothofagus-dominated and Angiosperm-dominated evergreen forests are diverse in tree species, and mixed-species silviculture with commercially valuable species of variable shade tolerance is most promising. Some secondary forests can reach growth rates as high as 20 m3ha-1yr-1. After thinnings, stands with 35–60% of residual densities have shown the best responses in growth. Even-aged silvicultural methods have shown a rapid reorganization and development of new cohorts, although, where Chusquea species are conspicuous, regeneration establishment requires controlling competing vegetation. Preliminary results also show interesting prospects for single-tree selection cuts in uneven-aged forests. East of the Andes, in Argentina, mixed Nothofagus forests and pure and mixed Nothofagus and A. chilensis forests occur. The shelterwood method has been the most practised and successful in the mixed Nothofagus forests, with abundant regeneration, and good growth rates. For A. chilensis forests, an adaptive management approach is proposed, conditioned by the cypress disease attack (e.g., Phytophthora austrocedri). Conversion of pure A. chilensis to mixed A. chilensis–N. dombeyi forests could increase growth considerably. Finally, in the cool temperate Nothofagus forests and Magellanic rainforests, shared by Chile and Argentina, the regular shelterwood cuts have been the most common silvicultural method, with massive regeneration a decade after the regeneration felling. Since the two major Nothofagus species in these forests regenerate well in gaps, uneven-aged silviculture seems also promising. Conclusions: There is abundant knowledge about the silviculture of these forest types. However, there are opportunities for several silvicultural systems to better contribute to sustainable forest management, reverse forest degradation, and cope with climate change challenges, primarily through developing mixed and single-species productive and carbon-rich forests, with greater adaptive capacity.

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Dendroecology Applied to Silvicultural Management in the Southern Patagonian Forests: A Case Study from an Experimental Forest in Tierra del Fuego, Argentina

Cited by 3 publications

References 26 publications

Radial growth response to long-term thinning strategies in Nothofagus pumilio forests of Tierra del Fuego

Radial growth response to long-term thinning strategies in Nothofagus pumilio forests of Tierra del Fuego

Summer temperature changes in Tierra del Fuego since AD 1765: atmospheric drivers and tree-ring reconstruction from the southernmost forests of the world

Silviculture of South American temperate native forests

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