A5013434317- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Forest ecology and management
- Hydrology and Watershed Management Studies
- Soil and Unsaturated Flow
- Atmospheric chemistry and aerosols
- Plant responses to elevated CO2
- Atmospheric and Environmental Gas Dynamics
- Urban Heat Island Mitigation
- Ecology and Vegetation Dynamics Studies
- Hydrology and Drought Analysis
- Land Use and Ecosystem Services
- Fire effects on ecosystems
- Urban Green Space and Health
- Air Quality Monitoring and Forecasting
- Forest Insect Ecology and Management
- Vehicle emissions and performance
- Soil Carbon and Nitrogen Dynamics
- Plant responses to water stress
- Plant Ecology and Soil Science
- Forest Management and Policy
- Lichen and fungal ecology
- Leaf Properties and Growth Measurement
- Soil and Environmental Studies
- Soil erosion and sediment transport
Harvard University
2021-2025
Evolutionary Genomics (United States)
2025
Harvard University Press
2024
Agricultural Research Organization
2023-2024
Weizmann Institute of Science
2014-2023
Hebrew University of Jerusalem
2016-2023
AgroParisTech
2020
Université de Lorraine
2020
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020
Texas A&M University
2020
Summary Forest dieback caused by drought‐induced tree mortality has been observed world‐wide. Forecasting which trees in locations are vulnerable to is important predict the consequences of drought on forest structure, biodiversity and ecosystem function. In this paper, our central aim was compile a synthesis traits associated abiotic variables that can be used mortality. We reviewed literature specifically links functional site conditions (i.e. edaphic biotic conditions), targeting studies...
• Urban tree canopy cover is a promising solution for mitigating heat island. Data-driven guidance on selection and planting locations still limited. Four research priorities are proposed, requiring collaborative effort. Cross-climate morphological physiological characteristics desired. Integration with atmospheric boundary layer models suggested.
Abstract. Soil respiration is the sum of processes in soil and a major flux global carbon cycle. It usually assumed that CO2 efflux equal to rate. Here we challenge this assumption by combining measurements with high-precision O2. These were conducted on different ecosystems types included air samples taken from profile three Mediterranean sites: temperate forest two alpine forests. Root-free soils sites also incubated lab. We found ratio between O2 influx (defined as apparent respiratory...
ABSTRACT Knowledge of the relationship between soil water dynamics and tree use is critical to understanding forest response environmental change in water‐limited ecosystems. However, availability for transpiration ( T t ) cannot be easily deduced from conventional measurements content (SWC), notably because influenced by potential (Ψ s that, turn, depends on characteristics. Using sap flow deriving depth‐dependent retention curves, we quantified ‘transpirable content’ (tSWC) its seasonal...
Abstract Broad‐scale forest die‐off associated with drought and heat has now been reported from every forested continent, posing a global‐scale challenge to management. Climate‐driven is frequently compounded other drivers of tree mortality, such as altered land use, wildfire, invasive species, making management increasingly complex. Facing similar challenges, rangeland managers have widely adopted the approach developing conceptual models that identify key ecosystem states major types...
Abstract Drought‐related tree mortality had become a widespread phenomenon in forests around the globe. This process leading to these events and its complexity is not fully understood. Trees dry timberline are exposed ongoing drought, available water for transpiration soil can determine their survival chances. Recent drought years led 5%–10% semi‐arid pine forest of Yatir (Israel). The distribution dead trees was, however, highly heterogeneous with parts showing >80% (D plots) others...
Trees are increasingly exposed to hot droughts due CO2 -induced climate change. However, the direct role of [CO2 ] in altering tree physiological responses drought and heat stress remains ambiguous. Pinus halepensis (Aleppo pine) trees were grown from seed under ambient (421 ppm) or elevated (867 ]. The 1.5-yr-old trees, either well watered treated for 1 month, transferred separate gas-exchange chambers temperature gradually increased 25°C 40°C over a 10 d period. Continuous whole-tree shoot...
Global warming and drying trends, as well the increase in frequency intensity of droughts, may have unprecedented impacts on various forest ecosystems. We assessed role internal water storage (WS) drought resistance mature pine trees semi-arid Yatir Forest. Transpiration (T), soil moisture sap flow (SF) were measured continuously, accompanied by periodical measurements leaf branch potential (Ψleaf) content (WC). The data used to parameterize a tree hydraulics model examine impact WS...
Mediterranean oak and pine forests support a large diversity of plants animals, provide multiple ecosystem services to the benefit people. Many these are threatened by climate change-induced drought, especially in marginal habitats at dry edge their distribution. Livestock grazing is widespread drylands, but research on impact focuses mainly herbaceous vegetation much less known consequences for woody vegetation, including trees. The overarching objective this series studies was evaluate...
Abstract Drought‐related tree mortality is increasing globally, but the sequence of events leading to it remains poorly understood. To identify this sequence, we used a 2016 event in semi‐arid pine forest where dendrometry and sap flow measurements were carried out 31 trees, which seven died. A comparative analysis revealed three stages mortality. First, decrease diameter all dying not surviving 8 months “prior visual signs mortality” (PVSM; e.g., near complete canopy browning). Second,...
Abstract Vapor pressure deficit (VPD) has increased and will likely continue increasing, with wide‐ranging effects on ecosystems. Future VPD increases largely be driven by warming, yet most experiments examining plants have done so changing humidity. Here, we used meteorological data carbon water fluxes measured at 26 climatically‐diverse eddy covariance sites to quantify the extent which been variation in air temperature versus We fit generalized additive models (GAMs) each site of hotter...
In this study, we examine tree resilience in response to compound atmospheric and soil droughts, using dendrometer-based stem diameter measurements a semi-arid pine forest. Our main question is: what is the differential impact of drought on plant growth resilience? By analyzing data from an irrigation experiment mature trees, developed new tools for characterizing heatwaves, introduced novel indices, especially designed robust evaluation recovery resistance trees experiencing short intense...
Forests play a vital role in the earth’s ecosystems by regulating global water and carbon cycles assimilation. While significant advancements have been made understanding impacts of drought on tree physiology gas exchange, extent to which alleviation soil mitigates impact high vapor pressure deficit (VPD) leaf net photosynthesis (Anet) remains unclear. In six-year study (SDA; using dry-season supplement irrigation), we investigated its mitigating effects response branch-scale...
The temporal dynamics of water transport and storage in plants have major implications for plant functioning survival. In trees, stress on the conductive tissue can be moderated by storage. Yet, trees survive high percent loss conductivity (PLC, up to 80%), suggesting efficient recovery. We assess role tree PLC recovery based simultaneous measurements leaf transpiration, branch hydraulic conductivity, stem sap-flow from different seasons three study years mature Pinus halepensis (Miller) a...
From 26 March to 29 2023, at the Georgia Center in Athens, GA, USA, a workshop on urban trees gathered 40 specialists from wide array of disciplines, including tree physiology, forest ecology, arboriculture, forestry, soil science, ecohydrology, vegetation modelling, computer vision, and industrial design. With 28 attendees four continents, seven countries physically present, further 12 participants joining virtually, brought together an international team aiming better understand...
Abstract Climate change will impact forest productivity worldwide. Forecasting the magnitude of such impact, with multiple environmental stressors changing simultaneously, is only possible help process‐based models. In order to assess their performance, models require careful evaluation against measurements. However, direct comparison model outputs observational data often not reliable, as may provide right answers due wrong reasons. This would severely hinder forecasting abilities under...
Drought can cause tree mortality through hydraulic failure and carbon starvation. To prevent excess water loss, plants typically close their stomata before massive embolism formation occurs. However, unregulated loss leaf cuticles bark continues after stomatal closure. Here, we studied the diurnal seasonal dynamics of transpiration how it is affected by availability. We measured continuously for six months CO2 efflux from branch segments needle-bearing shoots in Pinus halepensis growing a...
Climate change is often associated with increasing vapour pressure deficit (VPD) and changes in soil moisture (SM). While atmospheric drying co-occur, their differential effects on plant functioning productivity remain uncertain. We investigated the divergent underlying mechanisms of drought based continuous, situ measurements branch gas exchange automated chambers a mature semiarid Aleppo pine forest. response control trees exposed to combined soil-atmospheric (low SM, high VPD) during...
Abstract. Soil respiration, is the sum of respiration processes in soil, and a major flux global carbon cycle. It usually assumed that CO2 efflux equal to soil rate. Here we challenge this assumption by combining measurements with high-precision O2. These were conducted on different ecosystems types, included air-samples taken from profile three Mediterranean sites, temperate forest, two alpine forests. Root-free soils sites also incubated at lab. We found ratio between O2 influx (which...