Early Development of Nothofagus (Nothofagaceae) Species From the Subantarctic Forest Under Experimental Conditions of Light, Substrate and Ecological Interaction

Dezzotti, Alejandro; Ponce, Oscar

doi:10.1590/01047760201824012507

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…This casual observation indicates that any changes in the light quality condition impact on the bloom of B. darwinii . The effect of C. culeou on the dynamics of forests has been extensively studied (Caccia et al, 2009; Dezzotti & Ponce, 2018; Marchesini et al, 2009; Veblen, 1982); these authors found that this species can influence either positively or negatively the regeneration of other species. Therefore, under shade conditions B. darwinii plants assign the carbon fixed to vegetative growth and, when light quantity and quality reaches to at least an edge plant level, favourable conditions for the development of reproductive organs would be generated since the increment in photosynthesis would lead to reproduction allocation.…”

Section: Resultsmentioning

confidence: 99%

Flowering phenology and reproductive success of native shrub Berberis darwinii Hook. along different light environments

Svriz,

Lediuk,

Agüero

et al. 2023

Austral Ecology

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Studies evaluating flowering phenology and reproductive success are necessary when we want to direct a domestication project in a species with a potential productive value. We studied flowering phenology and reproductive success of Berberis darwinii growing under different light conditions in its native distribution area in the Andean Patagonian forests of Argentina. We test the hypothesis that plants grown under conditions of high‐light availability exhibit advanced phenology and higher reproductive success than those grown under conditions of lower light availability. Phenology and reproductive success were determined in three contrasting light conditions at two forest sites, which were, canopy, gap and forest edge. Plants did not bloom under the forest canopy. Flowering and fruiting period lengths were similar in both sites and light conditions of gap and forest edge during spring and summer. Although gap plants had more racemes per shoot, racemes of edge plants had more flowers, fruits and a higher proportion of flowers producing ripe fruit. We show that B. darwinii reproduction studied in the Andean Patagonian forests is conditioned by the canopy openness. Regarding reproductive success, edge plants invest less resources in flower production than gap plants to have similar fruit production.

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Section: Resultsmentioning

confidence: 99%

Flowering phenology and reproductive success of native shrub Berberis darwinii Hook. along different light environments

Svriz,

Lediuk,

Agüero

et al. 2023

Austral Ecology

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“…Since 1988, a forest management monitoring program has been carried out in Lanín National Park, in which the composition, abundance, size and growth of recruited trees and seedlings are evaluated every 5 years, as well as the abundance of stump sprouts of N. obliqua and N. alpina (González Peñalba et al 2016). In addition, the abundance and dynamics of tree regeneration is a key indicator of forest management (Raison et al 2001), and for that reason it has been intensively assessed in the management area (Dezzotti et al 2003(Dezzotti et al , 2004Sola et al 2015;Dezzotti & Ponce 2018;Sola et al 2020). The mean regeneration density recorded included 4,963 seedlings ha -1 (height <2 m) and 5,735 saplings ha -1 (≥2 m) The response of Nothofagus stands to the shelterwood system is very positive considering the quantity and quality of the natural recruitment, whose values exceed the pre-established prescriptions.…”

Section: Silvicultural Experiencesmentioning

confidence: 99%

Silviculture of South American temperate native forests

Donoso

Promis

Loguercio

et al. 2022

NZJFS

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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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Higher establishment of nonnative trees with increased harvest intensity in strip cuttings

Dimarco,

Nacif,

Garibaldi

et al. 2024

New Forests

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Early Development of Nothofagus (Nothofagaceae) Species From the Subantarctic Forest Under Experimental Conditions of Light, Substrate and Ecological Interaction

Cited by 4 publications

References 27 publications

Flowering phenology and reproductive success of native shrub Berberis darwinii Hook. along different light environments

Flowering phenology and reproductive success of native shrub Berberis darwinii Hook. along different light environments

Silviculture of South American temperate native forests

Higher establishment of nonnative trees with increased harvest intensity in strip cuttings

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