Patrones de regeneración en renovales de Drimys winteri en el centro-norte de la Isla de Chiloé: cambios de acuerdo al tamaño y la densidad relativa

Soto, Daniel P.; Donoso, Pablo J.

doi:10.4067/s0717-92002006000300003

Cited by 4 publications

(1 citation statement)

References 24 publications

(24 reference statements)

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“…Shrubby vegetation also affects nutrient cycling [4] and provides breeding and feeding grounds for large mammals [5]. In addition to these ecological functions, the understory layer determines the future species composition and structure of forests [6,7], which is of economic and ecological importance [8]. This is simply because juvenile trees-the so-called regeneration-are also part of the understory layer.…”

Section: Introductionmentioning

confidence: 99%

Quantifying Understory Complexity in Unmanaged Forests Using TLS and Identifying Some of Its Major Drivers

et al. 2021

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The structural complexity of the understory layer of forests or shrub layer vegetation in open shrublands affects many ecosystem functions and services provided by these ecosystems. We investigated how the basal area of the overstory layer, annual and seasonal precipitation, annual mean temperature, as well as light availability affect the structural complexity of the understory layer along a gradient from closed forests to open shrubland with only scattered trees. Using terrestrial laser scanning data and the understory complexity index (UCI), we measured the structural complexity of sites across a wide range of precipitation and temperature, also covering a gradient in light availability and basal area. We found significant relationships between the UCI and tree basal area as well as canopy openness. Structural equation models (SEMs) confirmed significant direct effects of seasonal precipitation on the UCI without mediation through basal area or canopy openness. However, annual precipitation and temperature effects on the UCI are mediated through canopy openness and basal area, respectively. Understory complexity is, despite clear dependencies on the available light and overall stand density, significantly and directly driven by climatic parameters, particularly the amount of precipitation during the driest month.

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Section: Introductionmentioning

confidence: 99%

Quantifying Understory Complexity in Unmanaged Forests Using TLS and Identifying Some of Its Major Drivers

et al. 2021

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Does site quality affect the additive basal area phenomenon? Results from Chilean old-growth temperate rainforests

Donoso

Soto

2016

Can. J. For. Res.

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12Complex old-growth forests with large emergent trees may support more basal area-BA than 13 those without these trees. The so-called additive basal area phenomenon occurs when the 14 presence of these emergent trees does not affect the basal area (BA) of the canopy trees, i.e. BA 15 of emergent and canopy trees add up. We studied two old-growth forests in south-central Chile 16 with similar species composition and structure but contrasting soil quality. We sampled 57 1,000 17 m 2 plots in a relatively high-quality site (Quillaipe) and 65 in a relatively low-quality site 18 (Yaldad), and evaluated total stand BA, BA of emergent trees, BA of canopy trees, and the 19 influence of the BA of emergent trees on total and canopy BA. Quillaipe accumulated on average 20 50% higher BA than Yaldad. The additive BA effect only occurred on the high quality site 21 Quillaipe. A more detailed analysis showed that canopy associates were differentially affected in 22 terms of BA depression with increasing BA of emergent trees in each site. The relative 23 competitive ability of canopy species, as affected by their ecological traits and geographical 24 distribution, presumably explain if BA of individual species or functional groups are depressed 25 by the BA of emergents. Above-and below ground resource partitioning may be decisive 26 mechanisms affecting the occurrence of additive BA accumulation in forest stands.

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Assessing woody vegetation recovery in the Rayas River following the eruption of the Chaitén Volcano in 2008

Ulloa

Mazzorana

Iroumé

et al. 2022

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We studied the recovery of the woody vegetation in a segment of the Rayas River, that drains the Chaitén Volcano, in southern Chile. Data collection in the river corridor was performed to assess the regeneration rates of the colonizing vegetation within the river corridor, to investigate the site-specific regeneration modes (i.e., with respect to the different morphological units), to determine the species composition and to observe potential similarities with the regeneration process on hillslopes (i.e., outside the river corridor). We first performed a sampling of the shrub and tree vegetation regenerating in the Forest adjacent to the study segment. Further samplings were executed on Islands, High bars, the Floodplain, and in association to Wood jams. Results show that nine years after the volcano's last eruption, pre-eruption remnant Islands and the Floodplain exhibited an abundant regeneration, with the highest density of recruits and species richness. In addition, a clear difference was observed between the river corridor and the Forest, both in the characteristics of the plants that were regenerating as well as in the species composition. Finally, the vegetation that has re-established after the eruption have not yet acquired the capacity to play a stabilizing role in the fluvial corridor. New insights are provided on reforestation patterns at sites impacted by Large Infrequent Disturbances.

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Patrones de regeneración en renovales de Drimys winteri en el centro-norte de la Isla de Chiloé: cambios de acuerdo al tamaño y la densidad relativa

Cited by 4 publications

References 24 publications

Quantifying Understory Complexity in Unmanaged Forests Using TLS and Identifying Some of Its Major Drivers

Quantifying Understory Complexity in Unmanaged Forests Using TLS and Identifying Some of Its Major Drivers

Does site quality affect the additive basal area phenomenon? Results from Chilean old-growth temperate rainforests

Assessing woody vegetation recovery in the Rayas River following the eruption of the Chaitén Volcano in 2008

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