A5022709614- Tree-ring climate responses
- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Tree Root and Stability Studies
- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Horticultural and Viticultural Research
- Forest Insect Ecology and Management
- Remote Sensing in Agriculture
- Plant Diversity and Evolution
- Landslides and related hazards
- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
Lamont-Doherty Earth Observatory
2022-2025
University of Padua
2015-2025
University of Campania "Luigi Vanvitelli"
2020-2023
Columbia University
2022-2023
Forecasted warmer and drier conditions will probably lead to reduced growth rates decreased carbon fixation in long-term woody pools drought-prone areas. We therefore need a better understanding of how climate stressors such as drought constrain wood formation drive changes anatomy. Drying trends could if they are more intense spring, when radial conifers continental Mediterranean climates peak. Since tree species from the aforementioned areas have endure dry summers also cold winters, we...
Understanding how climate affects xylem formation is critical for predicting the impact of future conditions on tree growth and functioning in Mediterranean region, which expected to face warmer drier conditions. However, mechanisms response at different temporal scales are still largely unknown, being complicated by separation between spring autumn xylogenesis (bimodal pattern) most species such as pines. We investigated wood anatomical characteristics carbon stable isotope composition...
Abstract Intra-Annual Density Fluctuations (IADFs) are an important wood functional trait that determine trees’ ability to adapt climatic changes. Here, we use a large tree-ring database of 11 species from 89 sites across eight European countries, covering gradient the Mediterranean northern Europe, analyze how climate variations drive IADF formation. We found occurrence increases nonlinearly with ring width in both gymnosperms and angiosperms decreases altitude age. Recently recorded higher...
Upland trees can exchange CH4 with the atmosphere through stems. Stem emissions could be produced in soils and transported roots, or hardwood by methanogenic archaea inhabiting trees. However, there is still limited information on how different origins depend species environmental conditions. There general understanding that stem are controlled soil moisture conditions, therefore, from water-limited ecosystems might present little (if any) emissions. this hypothesis has not been tested yet...
The science of tropical dendrochronology is now emerging in regions where tree-ring dating had previously not been considered possible. Here, we combine wood anatomical microsectioning techniques and radiocarbon analysis to produce the first chronology with verified annual periodicity for a new dendrochronological species, Neltuma alba (commonly known as "algarrobo blanco") Andes Bolivia. First, generated preliminary composed six trees using traditional methods (i.e., cross-dating). We then...
This Special Issue presents recent advancements in tropical dendrochronology the and subtropical Americas, focusing on identification of new species for dendrochronological studies, assessment climate influences tree-ring records, systematic reviews past research. The studies included this issue significantly contribute to our understanding tree suitable improvement dating techniques. Moreover, they delve into relationships between variables growth, offering insights response forests...
Abstract Global warming has pronounced effects on tundra vegetation, and rising mean temperatures increase plant growth potential across the Arctic biome. Herbivores may counteract impacts by reducing growth, but strength of this effect depend prevailing regional climatic conditions. To study how ungulates interact with temperature to influence shrubs biome, we assembled dendroecological data from 20 sites, comprising 1,153 individual 22,363 annual rings. Evidence for suppressing shrub...
The spatial coverage of tree-ring chronologies in tropical South America is low compared to the extratropics, particularly remote regions. Tree-ring dating from such sites limited by generally weak temperature seasonality, complex coloration, and indistinct anatomical morphology some tree species. As a result, there need complement traditional methods dendrochronology with innovative independent approaches. Here, we supplement via use radiocarbon analyses detect partial missing rings and/or...
Abstract Climate change significantly impacts global forests, leading to tree decline and dieback. To cope with climate change, trees develop several functional traits, such as intra-annual density fluctuations (IADFs) in rings. The formation of these traits facilitates optimize resource allocation, allowing them withstand periods stress eventually recover when the conditions become favourable again. This study focuses on a Pinus pinaster Aiton forest warm, drought-prone Mediterranean area,...
In the tropical Andes climate change is expected to increase temperatures and precipitation patterns. To overcome lack of systematic weather records that limits performance models in this region, use environmental information contained tree rings from Andean species have been found useful reconstruct spatio-temporal variability. Because classical dendrochronology based on ring-width patterns often challenging tropics, alternative approaches such as Quantitative Wood Anatomy (QWA) measurement...
Forest biomass resulting from tree radial growth can remain on the landscape over decadal to centennial timescales and plays a critical role in forest carbon cycling. However, visually green vegetation may not be good proxy for allocation as phenology environmental sensitivity of photosynthesis different growth. Here we investigate decoupling between across intra interannual seven North American oak species (Quercus spp.) at four sites (Lamont Sanctuary, NY; Morton Arboretum, IL; Pace...
<p>The  <strong>Italian TREETALKER NETWORK (ITT-Net) </strong>aims to respond one of the grand societal challenges: impact climate changes on forests ecosystem services and forest dieback. The comprehension link between these phenomena requires complement most classical approaches with a new monitoring paradigm based large scale, single tree, high frequency long-term tree physiology, which, at present, is limited by still elevated costs...
The ‘growing season’ of trees is often assumed to be coupled with climatology (e.g., summer vs winter) and visual canopy phenology cues leaf emergence in spring senescence autumn). However, green leaves are not always photosynthetically active actual tree radial growth via cambial cell division ‘invisible’ since it hard see occurs at micrometer resolution. Therefore, despite the presence apparently vegetation, may assimilating carbon or growing. Here,...
<p>An improvement of our understanding how tree species will respond to warmer conditions and longer droughts requires comparing their responses across different environmental settings considering a multi-proxy approach. We used xylem traits (tree-ring width, formation intra-annual density fluctuations –IADFs, wood anatomy, D<sup>13</sup>C d<sup>18</sup>O records) retrospectively quantify these in three...
<p>Forest fires are becoming more intense and recurring due to climate change increasingly threatening the integrity functionality of forests worldwide. Trees’ resilience is closely influenced not only by direct fire damages, but also pre-existing stress conditions, such as high temperatures water deficit. Fire wounds extreme events can impair plant physiology triggering tree mortality in medium long term. Therefore, understanding links between fire, health...