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Climate response and drought resilience of Nothofagus obliqua secondary forests across a latitudinal gradient in south-central Chile

Artículo de revista
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Editorial
Elsevier
Date
2021
Metadata
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Autor(es)
Urrutia-Jalabert, Rocío
Barichivich Henríquez, Jonathan Eligio
Rozas, V.
Lara Aguilar, Antonio
Rojas Ponce, Yasna
Bahamóndez V., Carlos
Rojas-Badilla, Moisés
Gipoulou-Zuñiga, T.
Cuq, Emilio
Abstract
The climate response and resilience of tree growth to drought events have been widely reported for forests from the Northern Hemisphere. However, studies are much scarcer in the extra-tropical forests of southern South America. Mediterranean and Temperate forests of Chile are suffering from a moderate warming and a sustained precipitation decrease, occurring on top of an unprecedented megadrought since 2010. This study evaluated tree-growth patterns, the climate response and drought resilience of nine secondary Nothofagus obliqua forests across a latitudinal gradient from Mediterranean to Temperate climate in the Andes of Chile (35.7° to 40.3° S). Moreover, to improve the understanding of the spatial variation in productivity patterns, this research assessed trends in the maximum Normalized Difference Vegetation Index (peak in the NDVI) across the gradient for 2001–2018. Tree-growth patterns were highly influenced by stand dynamics, with steep decreasing trends in most of the stands related to a gradual canopy closure. Productivity trends had a flat pattern north of 38oS, but positive trends south of this latitude, which were mostly attributed to stand development. Tree growth was positively related to precipitation in all the sites, with annual and summer rainfall being more important in the north (Mediterranean climate) and south (Temperate climate), respectively. Conversely, maximum temperature had a negative effect on growth in most of the studied forests. This implies that projected warmer and drier conditions may have a detrimental effect on N. obliqua growth during coming decades. The two northern stands, located at the species dry range edge, were among the most resilient to drought and have not been strongly affected by the current megadrought in the area. Overall climate conditions, however, do not define the tolerance of stands to droughts, likely because local environmental and forests conditions play a key role. Although droughts have not strongly impacted the growth of N. obliqua across its distribution so far, future studies should assess the effects of the current long-term megadrought on growth resilience, and physiological studies should address the impacts of droughts and heat waves on forest function beyond what growth can unveil.
Materias
CRECIMIENTO FORESTAL
CAMBIO CLIMATICO
RESILIENCIA FORESTAL
SEQUIA
BOSQUE SECUNDARIO
ROBLE
Especie forestal
Nothofagus obliqua
URI
https://doi.org/10.1016/j.foreco.2021.118962
Collections
  • Inventario y Monitoreo de Ecosistemas Forestales

Documento no disponible en formato digital. Consultar en biblioteca INFOR: biblioteca@infor.cl

Licencia Creative CommonsExcepto si se señala otra cosa, la licencia del ítem se describe como Licencia Creative Commons Atribución-NoComercial-SinDerivar 4.0 Internacional

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DIRECCIÓN EJECUTIVA
Sucre 2397, Ñuñoa, Santiago
(56-2) 2366 71 00
SEDE METROPOLITANA
Sucre 2397, Ñuñoa, Santiago
(56-2) 2366 71 00
SEDE DIAGUITAS
Juan Georgini Runi 1507, La Serena
(56-51) 236 26 00
OFICINA CHILOÉ
Guarategua Lepe s/n, Nercón, Chiloé
(56-65) 263 36 41
OFICINA MAULE
Kurt Moller 754, Linares
(56-73) 221 54 96
SEDE BÍO BÍO
Camino a Coronel Km. 7,5. Concepción
(56-41) 285 32 60
SEDE LOS RÍOS
Fundo Teja Norte s/n. Valdivia
(56-63) 233 52 00
SEDE PATAGONIA
Camino Coyhaique Alto Km. 4,5. Coyhaique
(56-67) 226 25 00
OFICINA COCHRANE
Teniente Merino 463
(56-9) 9883 18 60

Volver arriba

MESA CENTRAL +56 2 25192800

 

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