Paulina Puchi

Italian National Research Council | CNR · Institute of Bioeconomy

Stand age significantly influences the functioning of forest ecosystems by shaping structural and physiological plant traits, affecting water and carbon budgets. Forest age distribution is determined by the interplay of tree mortality and regeneration, influenced by both natural and anthropogenic disturbances. Unfortunately, human-driven alteration...

Understanding the complex relationships between climate, forest carbon (C) uptake and biomass growth has become a research priority, crucial for assessing the climate change impacts on forest C sequestration. Such associations are expected to vary across biomes, due to different climate constraints on tree physiology. However , our understanding of...

Tree mortality and forest dieback episodes are increasing due to drought and heat stress. Nevertheless, a comprehensive understanding of mechanisms enabling trees to withstand and survive droughts remains lacking. Our study investigated basal area increment (BAI), and δ¹³C-derived intrinsic water-use-efficiency (iWUE), to elucidate beech resilience...

Boreal forest sinks one third of terrestrial carbon (C), playing a crucial role in mitigating climate change. However, our understanding of the relationship between carbon assimilation and its allocation into woody biomass production remains limited. To address this gap, we propose a novel approach that combines eddy covariance (EC), wood anatomy i...

Tree age plays an essential role in forest ecosystems' functioning by affecting structural and physiological plant traits that modulate the water and carbon budgets. On the other hand, tree age distribution in forests depends on population dynamics and, therefore, on the balance between tree mortality and regeneration events, which are ultimately c...

Stand age significantly influences the functioning of forest ecosystems by shaping structural and physiological plant traits, affecting water and carbon budgets. Forest age distribution is determined by the interplay of tree mortality and regeneration, influenced by both natural and anthropogenic disturbances. Thus, human-driven alteration of tree...

Tree mortality and forest dieback episodes are increasing due to drought and heat stress. Nevertheless, a comprehensive understanding of mechanisms enabling trees to withstand and survive droughts remains lacking. Our study investigated basal area increment (BAI), and δ13C-derived intrinsic water-use-efficiency (iWUE), to elucidate beech resilience...

Abstract This is the 3D-CMCC-FEM (Three Dimensional - Coupled Model Carbon Cycle - Forest Ecosystem Model) user guide for the version 5.5-ISIMIP and 5.6. The 3D-CMCC-FEM is a biochemical, biophysical process-based model and is basically a research tool which is freely available only for non-commercial use. This user guide describes the essential st...

The forest of Araucaria araucana (“pewen” in Mapuche language), with its associated species of the genus Nothofagus, is unique from an evolutionary, biological and sociocultural point of view. Due to the interdependence and interrelation with the Mapuche-Pewenche people, it is considered a biocultural ecosystem. This work is a comprehensive binatio...

Forests are major terrestrial carbon (C) sinks and play a crucial role in climate change mitigation. Despite extensive studies on forest C sequestration, the relationship between seasonal C uptake and its allocation to woody biomass is poorly understood. Here we used a novel dendro-anatomical approach to investigate the relationships between climat...

Regional teleconnections permit cross-continental modeling of hydroclimate throughout the world. Tree-rings are a good hydroclimatic proxy used to reconstruct drought and streamflow in regions that respond to common global forcings. We used a multi-species dataset of 32 tree-ring width chronologies from Chile and Uruguay as a climate proxy to infer...

In 2010–2018 Northern Patagonia featured the longest severe drought of the last millennium. This extreme dry spell triggered widespread growth decline and forest dieback. Nonetheless, the roles played by the two major mechanisms driving dieback, hydraulic failure and carbon starvation, are still not clear and understudied in this seasonally dry reg...

INTRODUCCIÓN Araucaria araucana es una especie endémica de los bosques templados lluviosos de Chile y Argentina, declarada Monumento Natural en 1990 y clasificada por la IUCN como En Peligro en el año 2013. En los últimos años, la mega sequía (2010-2018, Garreaud et al., 2019) y el aumento de la temperatura han provocado fenómenos de decaimiento y...

The effects of climate change on high‐latitude forest ecosystems are complex, making forecasts of future scenarios uncertain. The predicted lengthening of the growing season under warming conditions is expected to increase tree growth rates. However, there is evidence of an increasing sensitivity of the boreal forest to drought stress. To assess th...

One of the most evident effects of the rapid warming occurring recently in cold and high-latitude forests is the lengthening of the growing season, with the concurrent extension of the period of wood formation. In addition, the increase of evapotranspiration demand is starting to induce drought-stress conditions. By selecting the same black spruce...

Tree-ring and xylogenesis studies have shown that the main environmental driver of wood formation in boreal forests is temperature. Quantitative wood anatomy is a new approach to investigate environmental drivers on tree growth at intra-annual scale. The aim of this research is to explore the possibility of detecting cambial phenology information f...

Streamflow in south-central Chile (SCC, ∼ 37–42∘ S) is vital for agriculture, forestry production, hydroelectricity, and human consumption. Recent drought episodes have generated hydrological deficits with damaging effects on these activities. This region is projected to undergo major reductions in water availability, concomitant with projected inc...

Streamflow in South-Central Chile (SCC, ∼35 o S-42 o S) is vital for agriculture, forestry production, hydroelectricity, and human consumption. Recent drought episodes have generated hydrological deficits with damaging effects on these activities. This region is projected to undergo major reductions in water availability, concomitant with projected...

The churches on Chiloé Island are the oldest wood structures in Chile. Chiloé islanders adapted European colonial techniques and developed unique regional construction styles when building these UNESCO-recognized community and religious centers. Although these historical treasures are preserved, much of the construction history of these churches re...

As rainfall in South-Central Chile has decreased in recent decades, local communities and industries have developed an understandable concern about their threatened water supply. Reconstructing streamflows from tree-ring data has been recognized as a useful paleoclimatic tool in providing long-term perspectives on the temporal characteristics of hy...

The main objective of this study was to assessing the relationship between the elemental composition of Araucaria araucana growth-rings during eruptive events of different volcanic explosivity index of Villarrica volcanoe.

Little dendroclimatic research has been conducted on species of Podocarpus, in response to inherent difficulties associated with tree-ring differentiation and cross-dating. We sampled complete stem cross sections from a plantation of Podocarpus salignus trees in Valdivia, Chile, near the southern edge of the species’ range. We measured earlywood, l...