A5010020848- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Forest ecology and management
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Climate variability and models
- Geology and Paleoclimatology Research
- Wood Treatment and Properties
- Botany and Plant Ecology Studies
- Plant responses to elevated CO2
- Hydrology and Watershed Management Studies
- Cardiac Valve Diseases and Treatments
- Ecosystem dynamics and resilience
- Tree Root and Stability Studies
- Plant Physiology and Cultivation Studies
- Horticultural and Viticultural Research
- Forest Biomass Utilization and Management
- Mediterranean and Iberian flora and fauna
- Hydrology and Sediment Transport Processes
- Cardiovascular Function and Risk Factors
Institut de Biologia Evolutiva
2023-2025
Universitat de Barcelona
2018-2025
Swiss Federal Institute for Forest, Snow and Landscape Research
2019-2024
Technical University of Munich
2017-2018
Summary The impact of climate extremes on forest ecosystems is poorly understood but important for predicting carbon and water cycle feedbacks to climate. Some knowledge gaps still remain regarding how drought‐related adjustments in intra‐annual tree‐ring characteristics directly tree use. In this study we quantified the an extreme summer drought water‐use efficiency sequestration four mature Norway spruce trees. We used detailed observations wood formation (xylogenesis) properties...
Forests are undergoing increasing risks of drought-induced tree mortality. Species replacement patterns following mortality may have a significant impact on the global carbon cycle. Among major hardwoods, deciduous oaks (Quercus spp.) increasingly reported as replacing dying conifers across Northern Hemisphere. Yet, our knowledge growth responses these to drought is incomplete, especially regarding post-drought legacy effects. The objectives this study were determine occurrence, duration,...
Climate change may reduce forest growth and increase mortality, which is connected to high carbon costs through reductions in gross primary production net ecosystem exchange. Yet, the spatiotemporal patterns of vulnerability both short-term extreme events gradual environmental changes are quite uncertain across species' limits tolerance dryness. Such information fundamental for defining ecologically relevant upper species drought and, hence, predict risk increased mortality shifts...
Summary The ratio of leaf internal ( c i ) to ambient a partial pressure CO 2 , defined here as χ is an index adjustments in both stomatal conductance and photosynthetic rate environmental conditions. Measurements proxies this can be used constrain vegetation model uncertainties for predicting terrestrial carbon uptake water use. We test theory based on the least‐cost optimality hypothesis modelling historical changes over 1951–2014 period, across different tree species conditions,...
Abstract In forests, the increase in atmospheric CO 2 concentrations ( C a ) has been related to enhanced tree growth and intrinsic water‐use efficiency iWUE ). However, drought‐prone areas such as Mediterranean Basin, it is not yet clear what extent this “fertilizing” effect may compensate for drought‐induced reduction. We investigated physiological responses at five Scots pine Pinus sylvestris L.) sessile oak Quercus petraea (Matt.) Liebl.) sites located their southernmost distribution...
The oxygen isotope composition (δ18 O) of tree-ring cellulose is used to evaluate tree physiological responses climate, but their interpretation still limited due the complexity fractionation pathways. We assessed relative contribution seasonal needle and xylem water δ18 O variations intra-annual signature larch trees at two sites with contrasting soil availability in Swiss Alps. combined biweekly measurements water, twig cellulose, xylogenesis analysis, mechanistic structural equation...
This is the first Europe-wide comprehensive assessment of climatological and physiological information recorded by hydrogen isotope ratios in tree-ring cellulose (δ2Hc) based on a unique collection annually resolved 100-year records two genera (Pinus Quercus) from 17 sites (36°N to 68°N). We observed that high-frequency climate signals δ2Hc chronologies were weaker than those carbon (δ13Cc) oxygen (δ18Oc) but similar width ones (TRW). The signal strength varied across continent was stronger...
Abstract The mechanistic pathways connecting ocean-atmosphere variability and terrestrial productivity are well-established theoretically, but remain challenging to quantify empirically. Such quantification will greatly improve the assessment prediction of changes in carbon sequestration response dynamically induced climatic extremes. jet stream latitude (JSL) over North Atlantic-European domain provides a synthetic robust physical framework that integrates climate not accounted for by...
Understanding changes in the physiological responses of trees to disturbances, and establishing proxies reconstruct past events, is high importance a changing world. Recent studies have demonstrated potential δ2H tree-ring cellulose as proxy for carbon utilization, reflecting shifts between use current assimilates stored C sources. These findings might explain considerable annual variations strength δ18O (O-H) relationship despite shared hydrological pathway, underlining...
Water stable isotopes are valuable proxies for tracing water fluxes within the critical zone, Earth’s layer extending from vegetation through to deep aquifers. This technique has helped develop conceptual models of distribution across scales, making it essential understand how trees regulate stored their internal compartments. To investigate this, we sampled a representative Pinus sylvestris tree an ecohydrologically monitored forest plot in Vallcebre research catchments (NE...
Drought is a key limiting factor for tree growth in the Mediterranean Basin. However, variability acclimation via xylem traits largely unknown. We studied and vessel features of Quercus petraea (Matt.) Lieb. five marginal stands across southern Europe. Tree-ring width (TRW), mean earlywood area (MVA) number vessels (NV) as well theoretical hydraulic conductivity (Kh) chronologies were developed period 1963–2012. Summer drought signals consistent among TRW chronologies; however, climatic...
Abstract Plant species that grow across environmental gradients show a range of trait expression, but traits do not vary independently. In fact, phenotypes are integrated expressions multiple covary due to trade‐offs among functions and processes. Understanding covariation structures will ultimately help with predicting species' responses change developing management actions. We measured variation (a proxy phenotypic integration) functional Pinus sylvestris from paired populations its...
Abstract Motivation Trait variation within species can reveal plastic and/or genetic responses to environmental gradients, and may indicate where local adaptation has occurred. Here, we present a dataset of rangewide in leaf traits from seven the most ecologically economically important tree Europe. Sample collection trait assessment are embedded GenTree project (EU‐Horizon 2020), which aims at characterizing phenotypic variability forest optimize management sustainable use resources. Our...
Many temperate European tree species have their southernmost distribution limits in the Mediterranean Basin. The projected climatic conditions, particularly an increase dryness, might induce altitudinal and latitudinal retreat at limit. Therefore, characterizing morphological physiological variability of under dry conditions is essential to understand species' responses expected climate change. In this study, we compared branch-level hydraulic traits four Scots pine sessile oak natural...
Climate change-induced rise of air temperatures and the increase extreme climatic events, such as droughts, will largely affect plant growth hydraulics, leading to mortality events all over globe. In this study, we investigated hydraulic responses seedlings contrasting functional types. Pinus sylvestris, Quercus spp. Castanea sativa were grown in a common garden experiment under four treatments: control, warming, drought their combination during two consecutive growing periods. Height...
Progress in the field of evolutionary forest ecology has been hampered by huge challenge phenotyping trees across their ranges natural environments, and limitation high-resolution environmental information. The GenTree Platform contains phenotypic data from 4,959 12 ecologically economically important European tree species: Abies alba Mill. (silver fir), Betula pendula Roth. birch), Fagus sylvatica L. (European beech), Picea abies (L.) H. Karst (Norway spruce), Pinus cembra (Swiss stone...
The study of tree rings can reveal long-term records a tree's response to the environment. This dendroecological approach, when supplemented with finer-scale observations xylem anatomy, provide novel information about year-to-year anatomical and hydraulic adjustments. Here we use this method in aspen (Populus tremuloides Michx.) identify drought insect defoliation. Surprisingly, found that precipitation influenced vessel diameter mostly trees' youth, while correlation was less pronounced at...
Evolutionary processes such as phenotypic plasticity and genetic adaptation are key mechanisms that have enabled tree species to cope with major changes in their environments colonize new areas over millennia. Forest populations currently experiencing extremely rapid environmental due anthropogenic climate change, challenging resilience the coming decades. Tree ecophysiological traits do not vary independently but rather coordinated; however, our understanding of whether these functional...
Recent changes in climate have triggered widespread mortality events oak forests worldwide. Despite the ecological importance of these ecosystems, limited information exists on long-term resilience response to extreme events. Quercus canariensis, a semi-deciduous sensitive summer drought characteristic Mediterranean climate, is currently showing defoliation and episodes drier areas its natural range. Here, we investigated impacts radial growth Q. canariensis assessed droughts across eight...