Effects of solar radiation on regeneration patterns in a Nothofagus dombeyi (Mirb.) Oerst. old-growth forest in Chile’s central-southern Andes
| Autor: | Pamela Encina, Burkhard Müller-Using, Peter Annighöfer, Manuel Sánchez-Olate, Katia Sáez-Carrillo, Rolando Rodríguez, Darcy Ríos Leal |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Nothofagus dombeyi Plant Science Natural regeneration Horticulture Radiation Atmospheric sciences 010603 evolutionary biology 01 natural sciences Advanced regeneration Basal area 03 medical and health sciences Global solar radiation 030304 developmental biology solar radiation transmissivity Nothofagus disturbance 0303 health sciences geography geography.geographical_feature_category Ecology biology 15. Life on land biology.organism_classification Old-growth forest Radial growth Environmental science |
| Zdroj: | Gayana. Botánica v.76 n.1 2019 SciELO Chile CONICYT Chile instacron:CONICYT |
| Popis: | Nothofagus species behave like early successional species that recolonize open sites after of regular and large-scale disturbances. This study analyzed the effects of light regimes on patterns of advanced regeneration dynamics, growth in diameter and height of Nothofagus dombeyi (Mirb.) Oerst. (Density of 240 trees ha-1, basal area of 56.7 m2 ha-1). Systematic sampling every 50 m in three stands (7.5 ha) was used. At each point and with the same center, two concentric circular plots were established, 9.0 m and 1.8 m radius. For estimate solar radiation transmissivity in plots, a solariscope hemispheric photographic camera was used. Diameters at breast height and basal areas (BA), heights (H) were measured and then counted and measured N. dombeyi seedlings and saplings. 13 saplings of advanced regeneration were harvested from all gaps to obtain age (E), total height (TH), absolute radial growth (ARG), and absolute height growth (AHG). As results, solar radiation varied between 3 and 40%. ARG varied between 1.20 and 2.22 mm yr-1 and AHG between 0.15 and 0.43 m yr-1. We found correlation for ARG and AHG with direct and global solar radiation transmissivity, but not with diffuse solar radiation transmissivity. The plant age and transmittance of direct and global solar radiation explains the increases in diameter and height. However, in our study stated that in the Andean region of south-central Chile, N. dombeyi stands is affected by small-scale disturbances. Therefore, transmissivity radiation solar inside the forest, explaining natural regeneration patterns and growth of N. dombeyi. |
| Databáze: | OpenAIRE |
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