Microclimatic Conditions Restrict the Radial Growth of Nothofagus antarctica Regeneration Based on the Type of Forest Environment in Tierra del Fuego

Regeneration is crucial for forest continuity in natural and managed stands. Analyzing intra-annual dynamics can improve the understanding between growth and climate, identifying regeneration survival thresholds. The objective of this study was to determine the microclimate constraints (rainfall, ai...

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Autores principales: Martínez Pastur, Guillermo José, Rodríguez-Souilla, Julián, Lencinas, María Vanessa, Cellini, Juan Manuel, Chaves, Jimena E., Aravena-Acuña, Marie Claire, Roig, Fidel A., Peri, Pablo L.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2023
Materias:
Ciencias Agrarias
silvopastoral systems
regeneration growth
daily stem dynamics
dendrometers
microclimate
soil water content
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/160831
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-160831
record_format dspace
spelling I19-R120-10915-1608312023-11-28T20:04:02Z http://sedici.unlp.edu.ar/handle/10915/160831 Microclimatic Conditions Restrict the Radial Growth of Nothofagus antarctica Regeneration Based on the Type of Forest Environment in Tierra del Fuego Martínez Pastur, Guillermo José Rodríguez-Souilla, Julián Lencinas, María Vanessa Cellini, Juan Manuel Chaves, Jimena E. Aravena-Acuña, Marie Claire Roig, Fidel A. Peri, Pablo L. 2023 2023-11-28T19:09:42Z en Ciencias Agrarias silvopastoral systems regeneration growth daily stem dynamics dendrometers microclimate soil water content Regeneration is crucial for forest continuity in natural and managed stands. Analyzing intra-annual dynamics can improve the understanding between growth and climate, identifying regeneration survival thresholds. The objective of this study was to determine the microclimate constraints (rainfall, air, and soil temperatures) of Nothofagus antarctica regeneration growth in closed, open, and edge forests in Southern Patagonia. We measured stand characteristics (forest structure, understory plants, soil properties, animal use), microclimate, and the daily growth of regeneration using dendrometers (n = 6) during two growing seasons. We found significant differences in the studied variables (e.g., overstory, light, soil, understory plants, animal use) in the following order: closed primary forests > open forests > edge forests with openlands. These changes defined the microclimate across the overstory gradient (e.g., soil moisture), influencing the daily growth of regeneration across the growing season (lag, exponential, stationary). Rainfall (the F factor varied from 6.93 to 21.03) influenced more than temperature (the F factor varied from 0.03 to 0.34). Daily growth in closed forests indicated shrinkage (−0.0082 mm day−1 without rain and −0.0008 mm day−1 with 0.0–0.2 mm day−1 rainfall), while for more than 0.2 mm day−1 of rainfall, growth always increased. Open forests presented shrinkage during days without rain (−0.0051 mm day−1), showing positive growth according to rainfall. Edge forests always presented positive daily growth. The resilience of regeneration under these changed conditions was directly related to the overstory. The main outputs indicated that regeneration was vulnerable during non-rainy days at the middle or closed overstory (>40% crown cover), suggesting the need for long-term monitoring to develop better silvicultural proposals. Laboratorio de Investigaciones en Madera Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
silvopastoral systems
regeneration growth
daily stem dynamics
dendrometers
microclimate
soil water content
spellingShingle Ciencias Agrarias
silvopastoral systems
regeneration growth
daily stem dynamics
dendrometers
microclimate
soil water content
Martínez Pastur, Guillermo José
Rodríguez-Souilla, Julián
Lencinas, María Vanessa
Cellini, Juan Manuel
Chaves, Jimena E.
Aravena-Acuña, Marie Claire
Roig, Fidel A.
Peri, Pablo L.
Microclimatic Conditions Restrict the Radial Growth of Nothofagus antarctica Regeneration Based on the Type of Forest Environment in Tierra del Fuego
topic_facet Ciencias Agrarias
silvopastoral systems
regeneration growth
daily stem dynamics
dendrometers
microclimate
soil water content
description Regeneration is crucial for forest continuity in natural and managed stands. Analyzing intra-annual dynamics can improve the understanding between growth and climate, identifying regeneration survival thresholds. The objective of this study was to determine the microclimate constraints (rainfall, air, and soil temperatures) of Nothofagus antarctica regeneration growth in closed, open, and edge forests in Southern Patagonia. We measured stand characteristics (forest structure, understory plants, soil properties, animal use), microclimate, and the daily growth of regeneration using dendrometers (n = 6) during two growing seasons. We found significant differences in the studied variables (e.g., overstory, light, soil, understory plants, animal use) in the following order: closed primary forests > open forests > edge forests with openlands. These changes defined the microclimate across the overstory gradient (e.g., soil moisture), influencing the daily growth of regeneration across the growing season (lag, exponential, stationary). Rainfall (the F factor varied from 6.93 to 21.03) influenced more than temperature (the F factor varied from 0.03 to 0.34). Daily growth in closed forests indicated shrinkage (−0.0082 mm day−1 without rain and −0.0008 mm day−1 with 0.0–0.2 mm day−1 rainfall), while for more than 0.2 mm day−1 of rainfall, growth always increased. Open forests presented shrinkage during days without rain (−0.0051 mm day−1), showing positive growth according to rainfall. Edge forests always presented positive daily growth. The resilience of regeneration under these changed conditions was directly related to the overstory. The main outputs indicated that regeneration was vulnerable during non-rainy days at the middle or closed overstory (>40% crown cover), suggesting the need for long-term monitoring to develop better silvicultural proposals.
format Articulo
Articulo
author Martínez Pastur, Guillermo José
Rodríguez-Souilla, Julián
Lencinas, María Vanessa
Cellini, Juan Manuel
Chaves, Jimena E.
Aravena-Acuña, Marie Claire
Roig, Fidel A.
Peri, Pablo L.
author_facet Martínez Pastur, Guillermo José
Rodríguez-Souilla, Julián
Lencinas, María Vanessa
Cellini, Juan Manuel
Chaves, Jimena E.
Aravena-Acuña, Marie Claire
Roig, Fidel A.
Peri, Pablo L.
author_sort Martínez Pastur, Guillermo José
title Microclimatic Conditions Restrict the Radial Growth of Nothofagus antarctica Regeneration Based on the Type of Forest Environment in Tierra del Fuego
title_short Microclimatic Conditions Restrict the Radial Growth of Nothofagus antarctica Regeneration Based on the Type of Forest Environment in Tierra del Fuego
title_full Microclimatic Conditions Restrict the Radial Growth of Nothofagus antarctica Regeneration Based on the Type of Forest Environment in Tierra del Fuego
title_fullStr Microclimatic Conditions Restrict the Radial Growth of Nothofagus antarctica Regeneration Based on the Type of Forest Environment in Tierra del Fuego
title_full_unstemmed Microclimatic Conditions Restrict the Radial Growth of Nothofagus antarctica Regeneration Based on the Type of Forest Environment in Tierra del Fuego
title_sort microclimatic conditions restrict the radial growth of nothofagus antarctica regeneration based on the type of forest environment in tierra del fuego
publishDate 2023
url http://sedici.unlp.edu.ar/handle/10915/160831
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