Teresa E. Gimeno
A5017275488- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Ecology and Vegetation Dynamics Studies
- Plant responses to elevated CO2
- Hydrology and Watershed Management Studies
- Forest ecology and management
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Geology and Paleoclimatology Research
- Peatlands and Wetlands Ecology
- Fire effects on ecosystems
- Forest Ecology and Biodiversity Studies
- Groundwater and Isotope Geochemistry
- Soil Carbon and Nitrogen Dynamics
- Hydrology and Sediment Transport Processes
- Plant and animal studies
- Species Distribution and Climate Change
- Isotope Analysis in Ecology
- Forest Management and Policy
- Mycorrhizal Fungi and Plant Interactions
- Aeolian processes and effects
- Atmospheric chemistry and aerosols
- Tree Root and Stability Studies
- Horticultural and Viticultural Research
- Ecosystem dynamics and resilience
Centre for Research on Ecology and Forestry Applications
2022-2025
Interactions Sol Plante Atmosphère
2015-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2024
Basque Centre for Climate Change
2018-2023
Ikerbasque
2018-2022
Western Sydney University
2013-2020
University of the Basque Country
2019-2020
The University of Sydney
2015
Consejo Superior de Investigaciones Científicas
2010-2013
Mediterranean Center for Environmental Studies
2002-2013
Leaf dark respiration (Rdark ) is an important yet poorly quantified component of the global carbon cycle. Given this, we analyzed a new database Rdark and associated leaf traits. Data for 899 species were compiled from 100 sites (from Arctic to tropics). Several woody nonwoody plant functional types (PFTs) represented. Mixed-effects models used disentangle sources variation in . Area-based at prevailing average daily growth temperature (T) each site increased only twofold tropics, despite...
We apply and compare three widely applicable methods for estimating ecosystem transpiration (T) from eddy covariance (EC) data across 251 FLUXNET sites globally. All are based on the coupled water carbon relationship, but they differ in assumptions parameterizations. Intercomparison of daily T estimates shows high correlation among (R between .89 .94), a spread magnitudes T/ET (evapotranspiration) 45% to 77%. When compared at six with concurrent EC sap flow measurements, all EC-based show...
Abstract. For the past decade, observations of carbonyl sulfide (OCS or COS) have been investigated as a proxy for carbon uptake by plants. OCS is destroyed enzymes that interact with CO2 during photosynthesis, namely carbonic anhydrase (CA) and RuBisCO, where CA more important one. The majority sources to atmosphere are geographically separated from this large plant sink, whereas sinks co-located in ecosystems. drawdown can therefore be related without added complication emissions...
Abstract. We investigated plant water sources of an emblematic refugial population Fagus sylvatica (L.) in the Ciron river gorges south-western France using stable isotopes. It is generally assumed that no isotopic fractionation occurs during root uptake, so composition xylem effectively reflects source water. However, this assumption has been called into question by recent studies found that, at least some dates growing season, did not reflect any mixture potential sources. In context,...
A growing number of field studies report isotopic offsets between stem water and its potential sources that prevent the unambiguous identification plant origin using isotopes. We explored causes this offset by conducting a controlled experiment on temperate tree species Fagus sylvatica. measured δ2 H δ18 O soil from potted saplings three substrates subjected to two watering regimes. Regardless substrate, were similar only near permanent wilting point. Under moister conditions, was 11 ± 3‰...
Abstract. Plant transpiration links physiological responses of vegetation to water supply and demand with hydrological, energy, carbon budgets at the land–atmosphere interface. However, despite being main land evaporative flux global scale, its response environmental drivers are currently not well constrained by observations. Here we introduce first compilation whole-plant data from sap flow measurements (SAPFLUXNET, https://sapfluxnet.creaf.cat/, last access: 8 June 2021). We harmonized...
Plant populations of widely distributed species experience a broad range environmental conditions that can be faced by phenotypic plasticity or ecotypic differentiation and local adaptation. The strategy chosen will determine population's ability to respond climate change. To explore this, we grew Quercus ilex (L.) seedlings from acorns collected at six selected climatically contrasting localities evaluated their response drought late season cold events. Maximum photosynthetic rate (Amax),...
The response of terrestrial ecosystems to rising atmospheric CO2 concentration (Ca ), particularly under nutrient-limited conditions, is a major uncertainty in Earth System models. Eucalyptus Free-Air Enrichment (EucFACE) experiment, recently established nutrient- and water-limited woodland presents unique opportunity address this uncertainty, but can best do so if key model uncertainties have been identified advance. We applied seven vegetation models, which previously comprehensively...
Abstract Canopy leaf area, quantified by the area index ( L ), is a crucial driver of forest productivity, water use and energy balance. Because responds to environmental drivers, it can represent an important feedback climate change, but its responses rising atmospheric [ CO 2 ] availability forests have been poorly quantified. We studied canopy dynamics for 28 months in native evergreen Eucalyptus woodland exposed free‐air enrichment (the Euc FACE experiment), subtropical where limitation...
Summary Rising levels of atmospheric CO 2 concentration ( C a ) and simultaneous climate change profoundly affect plant physiological performance while challenging our ability to estimate vegetation–atmosphere fluxes. To predict rates water carbon exchange between vegetation the atmosphere, we require formulation for stomatal conductance g s that captures multidimensional response stomata changing environmental conditions. The unified optimization (USO) theory provides with novel conditions...
Abstract The analysis of the stable isotopic composition hydrogen and oxygen in water samples from soils plants can help to identify sources vegetation uptake. This approach requires that heterogeneous nature plant soil matrices is carefully accounted for during experimental design, sample collection, extraction analyses. comparability shortcomings different methods extracting analyzing have been discussed specialized literature. Yet, despite insightful comparisons benchmarking methodologies...
Understanding the impacts of atmospheric [CO2] and drought on leaf respiration (R) its response to changes in temperature is critical improve predictions plant carbon-exchange with atmosphere, especially at higher temperatures. We quantified effects [CO2]-enrichment (+240 ppm) seasonal shifts diel R during a moderate summer Eucalyptus saligna growing whole-tree chambers SE Australia. Seasonal acclimation was marked, as illustrated by: (1) downward shift daily curves (relative spring);...
Juniperus thurifera L. is an endemic conifer of the western Mediterranean Basin where it subjected to a severe climatic stress characterized by low winter temperatures and summer drought. Given trend increased warming-induced drought in this area sensitivity species, we expect negative impact climate change on growth ecophysiological performance J. harsh environments dominates. To evaluate this, measured long- short-term radial using dendrochronology, photosynthesis water-use efficiency...
Projections of future climate are highly sensitive to uncertainties regarding carbon (C) uptake and storage by terrestrial ecosystems. The Eucalyptus Free-Air CO2 Enrichment (EucFACE) experiment was established study the effects elevated atmospheric concentrations (eCO2 ) on a native mature eucalypt woodland with low fertility soils in southeast Australia. In contrast other FACE experiments, concentration at EucFACE increased gradually steps above ambient (+0, 30, 60, 90, 120, 150 ppm ~400...
Abstract. Isotope-based approaches to study plant water sources rely on the assumption that root uptake and within-plant transport are non-fractionating processes. However, a growing number of studies have reported offsets between source stable isotope composition for wide range ecosystems. These isotopic can result in erroneous attribution used by plants potential overestimations groundwater vegetation. We conducted global meta-analysis quantify magnitude these explored whether their...
Abstract. For the past decade, observations of carbonyl sulfide (OCS or COS) have been investigated as a proxy for carbon uptake by plants. OCS is destroyed enzymes that interact with CO2 during photosynthesis, namely carbonic anhydrase (CA) and RuBisCO, where CA more important. The majority sources to atmosphere are geographically separated from this large plant sink, whereas sinks co-located in ecosystems. drawdown can therefore be related without added complication emissions comparable...
Vapour pressure deficit (D) is projected to increase in the future as temperature rises. In response increased D, stomatal conductance (gs) and photosynthesis (A) are reduced, which may result significant reductions terrestrial carbon, water energy fluxes. It thus important for gas exchange models capture observed responses of gs A with increasing D. We tested a series coupled A-gs against leaf measurements from Cumberland Plain Woodland (Australia), where D regularly exceeds 2 kPa can reach...
Forests are being impacted by climate and land-use changes which have altered their productivity growth. Understanding how tree growth responds to in natural planted stands may provide valuable information prepare management sight of change. Plantations expected show higher sensitivity lower post-drought resilience than stands, due compositional structural diversity. We reconstructed compared the radial six conifers with contrasting ecological climatic niches (Abies pinsapo, Cedrus...