A5018234378- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Forest ecology and management
- Plant responses to water stress
- Tree Root and Stability Studies
- Hydrology and Sediment Transport Processes
- Ecology and Vegetation Dynamics Studies
- Pluripotent Stem Cells Research
- Single-cell and spatial transcriptomics
- Forest Management and Policy
- Remote Sensing and LiDAR Applications
- Gene expression and cancer classification
- CRISPR and Genetic Engineering
- Forest Ecology and Biodiversity Studies
- Hydrology and Watershed Management Studies
- Environmental Conservation and Management
- Environmental Impact and Sustainability
- Hydrology and Drought Analysis
- Economic and Environmental Valuation
- Bioinformatics and Genomic Networks
- Plant responses to elevated CO2
- 3D Printing in Biomedical Research
- RNA modifications and cancer
- Horticultural and Viticultural Research
- Flow Measurement and Analysis
University Hospital Schleswig-Holstein
2017-2024
University of Lübeck
2017-2024
University of Würzburg
2018-2024
University of Göttingen
2015-2024
Technische Universität Dresden
2022-2024
University of Birmingham
2023
Royal University of Bhutan
2023
Technical University of Munich
2023
Kiel University
2021
AgroParisTech
2020
In 2018, Central Europe experienced one of the most severe and long-lasting summer drought heat wave ever recorded. Before 2003 millennial was often invoked as example a "hotter drought", classified event in for last 500 years. First insights now confirm that 2018 climatically more extreme had greater impact on forest ecosystems Austria, Germany Switzerland than drought. Across this region, mean growing season air temperature from April to October 3.3°C above long-term average, 1.2°C warmer...
Summary Climate warming will increase the drought exposure of many forests world‐wide. It is not well understood how trees adapt their hydraulic architecture to a long‐term decrease in water availability. We examined 23 traits characterizing and growth rate branches dependent foliage mature European beech ( Fagus sylvatica ) along precipitation gradient (855–594 mm yr −1 on uniform soil. A main goal was identify that are associated with xylem efficiency, safety growth. Our data demonstrate...
Pit membranes in bordered pits between neighbouring vessels play a major role the entry of air-water menisci from an embolised vessel into water-filled ( i.e ., air-seeding). Here, we investigate intervessel pit membrane thickness (T PM ) and embolism resistance (P 50 , water potential corresponding to 50% loss hydraulic conductivity) across broad range woody angiosperm species. Data on T double wall VW were compiled based electron light microscopy. Fresh material that was directly fixated...
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...
Large-scale collections of induced pluripotent stem cells (iPSCs) could serve as powerful model systems for examining how genetic variation affects biology and disease. Here we describe the iPSCORE resource: a collection systematically derived characterized iPSC lines from 222 ethnically diverse individuals that allows both familial association-based studies. are with high genomic integrity (no or low numbers somatic copy-number variants) determined using high-throughput RNA-sequencing...
Understanding the vulnerability of trees to drought-induced mortality is key predicting fate forests in a future climate with more frequent and intense droughts, although underlying mechanisms are difficult study adult trees. Here, we explored dynamic changes water relations limits hydraulic function dying adults Norway spruce (Picea abies L.) during progression record-breaking 2018 Central European drought. In on trajectory mortality, observed rapid, nonlinear declines xylem pressure that...
Unprecedented tree dieback across Central Europe caused by recent global change-type drought events highlights the need for a better mechanistic understanding of drought-induced mortality. Although numerous physiological risk factors have been identified, importance two principal mechanisms, hydraulic failure and carbon starvation, is still debated. It further remains largely unresolved how local neighborhood composition affects individual mortality risk. We studied 9435 young trees 12...
European beech (Fagus sylvatica) was among the most affected tree species during severe 2018 drought. It not only suffered from instant physiological stress but also showed symptoms of defoliation and canopy decline in following year. To explore underlying mechanisms, we used Swiss-Canopy-Crane II site studied branches healthy symptomatic trees repair hydraulic function concentration carbohydrates drought 2019. We found loss conductance 2018, which did recover 2019 that developed year after...
Summary Although xylem embolism is a key process during drought‐induced tree mortality, its relationship to wood anatomy remains debated. While the functional link between bordered pits and resistance known, there no direct, mechanistic explanation for traditional assumption that wider vessels are more vulnerable than narrow ones. We used data from 20 temperate broad‐leaved species study inter‐ intraspecific of water potential at 50% loss conductivity ( P 50 ) with hydraulically weighted...
Abstract The International Stem Cell Initiative compared several commonly used approaches to assess human pluripotent stem cells (PSC). PluriTest predicts pluripotency through bioinformatic analysis of the transcriptomes undifferentiated cells, whereas, embryoid body (EB) formation in vitro and teratoma vivo provide direct tests differentiation. Here we report that EB assays, analyzed after differentiation under neutral conditions promoting ectoderm, mesoderm, or endoderm lineages, are...
It is generally assumed that the largest vessels are occurring in roots and vessel diameters related hydraulic conductance xylem decreasing acropetally from to leaves. With this study five tree species of a perhumid tropical rainforest Sulawesi (Indonesia), we searched for patterns architecture axial conductivity along flow path small-diameter through strong trunk distal sun-canopy twigs. Wood density differed by not more than 10% across different positions species, branch stem wood were...
In angiosperms, many studies have described the inter-specific variability of hydraulic-related traits and little is known at intra-specific level. This information however mandatory to assess adaptive capacities tree populations in context increasing drought frequency severity. Ten 20-yr old European beech (Fagus sylvatica L.) provenances representing entire distribution range throughout Europe differing significantly aboveground biomass increment (ABI) by a factor up four were investigated...
Summary Embolism spreading in angiosperm xylem occurs via mesoporous pit membranes between vessels. Here, we investigate how the size of pore constrictions is related to membrane thickness and embolism resistance. Pit were modelled as multiple layers number intervessel pits per vessel determine constriction sizes, probability encountering large pores, These estimations complemented by measurements thickness, resistance, stem ( n = 31, 31 20 species, respectively). The sizes decreased with...
From the 21st to 23rd June 2017, Herrenhausen castle in Hannover/Germany hosted a diverse and large crowd with more than 70 tree physiologists, forest ecologists, inventory experts, remote-sensing scientists, vegetation modelers. Participants from six continents 20 countries gathered discuss how improve scientific determination of global-scale patterns, drivers, trends threatening phenomenon: apparent emergence recent widespread mortality events forests around world. Continuing theme...
Abstract Key message Seven European beech provenances differing largely in growth performance were grown at two common garden sites Germany and Slovakia. The intra-specific variability of most traits was explained more by phenotypic plasticity than inter-provenance variability, efficiency-related showed a higher safety-related traits. Context To maintain climate-resilient future forests, replicated common-garden experiments are suited for developing assisted migration strategies key tree...
Abstract Key message Norway spruce operates with larger hydraulic safety margins (HSM) than beech and Douglas-fir despite the known drought sensitivity of spruce, questioning a pivotal role HSM in tolerance. The exceptional 2018/2019 exposed Central Europe’s forests to severe stress, highlighting need better understand stomatal regulation strategies their relationship xylem under extreme drought. We studied diurnal, seasonal, inter-annual variation conductance ( g s ) leaf water potential Ψ...
Abstract Although the intraoperative molecular diagnosis of approximately 100 known brain tumor entities described to date has been a goal neuropathology for past decade, achieving this within clinically relevant timeframe under 1 h after biopsy collection remains elusive. Advances in third-generation sequencing have brought closer, but established machine learning techniques rely on computationally intensive methods, making them impractical live diagnostic workflows clinical applications....