Forest Dynamics in South-Central Chile

Veblen, Thomas T.; Donoso, Z Claudio; Schlegel, F. M.; Escobar, R Bernardo

doi:10.2307/2844678

Cited by 239 publications

(259 citation statements)

References 38 publications

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“…For example, in forests in Chile, Japan, and Sichuan Province of China (e.g. Veblen et al, 1981;Runkle, 1981;Takahashi, 1994;Guo et al, 2013), dense bamboos occupy the forest understory or in canopy gaps and greatly impede tree seedlings and saplings. In addition, we found that in gaps with a small number of A. faxoniana seedlings or saplings, the effects bamboo was insignificant.…”

Section: Discussionmentioning

confidence: 99%

“…The subalpine coniferous forest is of important ecological and economic value in many countries, such as Chile (Veblen et al, 1981;Gonzalez et al, 2002), North America (Runkle, 1981), Japan (Nakashizuka, 1987;Yamamoto, 1993;Narukawa & Yamamoto, 2002), and China (Taylor & Qin, 1988b;Taylor et al, 1996;Liu & Wu, 2002;Dang et al, 2010;Guo et al, 2013). Take the one selected in Southwestern China for example, Abies faxoniana Rehd.…”

Section: Field Measurements and Data Analysesmentioning

confidence: 99%

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Effects of gap size, gap age, and bamboo Fargesia denudata on Abies faxoniana recruitment in South-western China

et al. 2015

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Aim of study: to study the effects of gap size, gap age and bamboo Fargesia denudata on natural regeneration of Abies faxoniana, both of which are the ubiquitous dominants in our research area.Area of study: subalpine coniferous forests in Wanglang Natural Reserve in Southwestern China. Material and Methods: 10 transect belts were randomly established, and a total of 97 gaps were recorded and used.Main results: (1) the number of bamboos with coverage of <17% significantly increased with increases of gap size and age, but the latter had little influence on the numbers of F. denudata with coverage of >17%. (2) F. denudata strongly inhibited A. faxoniana seedlings and saplings in small, young and old gaps, where the amount of A. faxoniana recruitment was relatively abundant, than in other types of gap. (3) The numbers of A. faxoniana seedlings in A-gaps, significantly decreased with the increases in gap size. However, in gaps where F. denudate was also present, A. faxoniana seedlings and saplings were insensitive to gap size or age. Research highlights: thick F. denudata would not be influenced by gap size or age. Because of the low occurrences of A. faxoniana seedlings and saplings, the negative effect of gap size, gap age and F. denudata on A. faxoniana recruitment was unclear

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Section: Discussionmentioning

confidence: 99%

Section: Field Measurements and Data Analysesmentioning

confidence: 99%

Effects of gap size, gap age, and bamboo Fargesia denudata on Abies faxoniana recruitment in South-western China

et al. 2015

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“…Both Nothofagus species are considered opportunist since they establish in large numbers and grow rapidly in open environments (catastrophic mode of regeneration, sensu Veblen 1992) created by large-scale natural disturbances such as landslides and volcanic ash falls, and also by fire and stand-devastating windthrow events (Veblen et al 1996). In contrast, the two main shade-tolerant trees, L. philippiana and S. conspicua, show some life history traits (e.g., shade tolerance, vegetative reproduction) that allow them to persist and take dominance in the absence of massive disturbances (continuous and gapphase regeneration mode, sensu Veblen 1992, Veblen et al 1980, 1981, Veblen 1985a. Eventually, in these forests, the replacement of Nothofagus spp.…”

Section: Introductionmentioning

confidence: 99%

“…In canopy gaps, the bamboo Chusquea culeou E. Desv., considered a key species for its important influence on tree regeneration, forms thickets with culms at least six m tall (Veblen et al 1980(Veblen et al , 1981. In these mixed forests, the lack of saplings and small-diameter individuals of Nothofagus indicates that these shade-intolerant species can not establish in undisturbed old-growth stands (Veblen et al 1980, Veblen 1985a).…”

Section: Introductionmentioning

confidence: 99%

“…Typically, Nothofagus species have limited opportunities to recruit even in large canopy gaps (i.e., > 1,000 m 2 ) due to the release of advance regeneration of the shade-tolerant trees and the vigorous proliferation of the Chusquea spp. bamboos (Veblen et al 1981(Veblen et al , 1985a(Veblen et al , 1989. Establishment of Nothofagus species in gaps occurs occasionally on elevated surfaces such as treefall mounds and large logs where competition with other species is reduced (Veblen et al 1981(Veblen et al , 1985a(Veblen et al , 1989.…”

Section: Introductionmentioning

confidence: 99%

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Tree-fall gaps and patterns of tree recruitment and growth in Andean old-growth forests in south-central Chile

2015

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An approach to quantify climate–productivity relationships: an example from a widespreadNothofagusforest

Salas‐Eljatib

2021

Ecological Applications

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Unique combinations of geographic and environmental conditions make quantifying the importance of factors that influence forest productivity difficult. I aimed to model the height growth of dominant Nothofagus alpina trees in temperate forests of Chile, as a proxy for forest productivity, by building a dynamic model that accounts for topography, habitat type, and climate conditions. Using stem analysis data of 169 dominant trees sampled throughout south-central Chile (35°50 0 and 41°30 0 S), I estimated growth model parameters using a nonlinear mixed-effects framework that takes into account the hierarchical structure of the data. Based on the proposed model, I used a system-dynamics approach to analyze growth rates as a function of topographic, habitat type, and climatic variability. I found that the interaction between aspect, slope, and elevation, as well as the effect of habitat type, play an essential role in determining tree height growth rates of N. alpina. Furthermore, the precipitation in the warmest quarter, precipitation seasonality, and annual mean temperature are critical climatic drivers of forest productivity. Given a forecasted climate condition for the region by 2100, where precipitation seasonality and mean annual temperature increase by 10% and 1°C, respectively, and precipitation in the warmest quarter decreases by 10 mm, I predict a reduction of 1.4 m in height growth of 100-yr-old dominant trees. This study shows that the sensitivity of N. alpina-dominated forests to precipitation and temperature patterns could lead to a reduction of tree height growth rates as a result of climate change, suggesting a decrease in carbon sequestration too. By implementing a system dynamics approach, I provide a new perspective on climate-productivity relationships, bettering the quantitative understanding of forest ecosystem dynamics under climate change. The results highlight that while temperature rising might favor forest growth, the decreasing in both amount and distribution within a year of precipitation can be even more critical to reduce forest productivity.

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Forest Dynamics in South-Central Chile

Cited by 239 publications

References 38 publications

Effects of gap size, gap age, and bamboo Fargesia denudata on Abies faxoniana recruitment in South-western China

Effects of gap size, gap age, and bamboo Fargesia denudata on Abies faxoniana recruitment in South-western China

Tree-fall gaps and patterns of tree recruitment and growth in Andean old-growth forests in south-central Chile

An approach to quantify climate–productivity relationships: an example from a widespreadNothofagusforest

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