A5051077636- Tree-ring climate responses
- Plant Water Relations and Carbon Dynamics
- Geology and Paleoclimatology Research
- Plant responses to elevated CO2
- Climate variability and models
- Archaeology and ancient environmental studies
- Isotope Analysis in Ecology
- Climate change impacts on agriculture
- Atmospheric chemistry and aerosols
- Forest ecology and management
- Polymer-Based Agricultural Enhancements
- Plant Stress Responses and Tolerance
Czech Academy of Sciences, Global Change Research Institute
2020-2025
Mendel University in Brno
2020-2025
The efficiency of water use in plants, a critical ecophysiological parameter closely related to and carbon cycles, is essential for understanding the interactions between plants their environment. This study investigates effects ongoing climate change increasing atmospheric CO2 concentration on intrinsic (stomata-based; iWUE) evaporative (transpiration-based; eWUE) oak trees along naturally small altitudinal gradient (130–630 m a.s.l.) Vihorlat Mountains (eastern Slovakia, Central Europe)....
Tree-ring stable isotopes (TRSI) have the unique ability to capture inter-annual multi-millennial climate trends and extremes if appropriate data methods are combined. However, there is still an ongoing debate about age-related biases in TRSI measurements that potentially affect fidelity of their chronologies subsequent reconstructions. Here, we investigate carbon oxygen cellulose (δ13Ccell δ18Ocell) hydrogen ratios lignin methoxy groups (δ13Cmeth δ2Hmeth) more than 60 living relict pine...
Abstract Central Europe has experienced a sequence of unprecedented summer droughts since 2015, which had considerable effects on the functioning and productivity natural agricultural systems. Placing these recent extremes in long-term context climate variability is, however, constrained by limited length observational records. Here, we use tree-ring stable oxygen carbon isotopes to develop annually resolved reconstructions growing season temperature moisture for central during past 2000...
Abstract Tree ring‐based climate reconstructions are fundamental for high‐resolution paleoclimatology, but only a few of them extend back into the mid‐Holocene (8,200–4,200 years BP). Here, we present annually‐resolved tree‐ring stable carbon and oxygen isotopes (δ 13 C δ 18 O) from subfossil yew ( Taxus baccata ) wood excavated in Fenland region eastern England. We develop an eco‐physiological model to reconstruct hydroclimate variability 5,224 4,813 ± 4 4,612–4,195 6 cal. BP. Our findings...
ABSTRACT The charring process can preserve archaeobotanical remains, providing valuable insights into past climates, agricultural practices, and plant growth conditions. However, the impact of on stable isotopes, especially at temperatures above 300°C, remains poorly understood. To investigate this, wheat (einkorn, emmer) millet grains were experimentally charred 450°C, 550°C for 15 min to 48 h under aerobic anaerobic Consequently, isotopic ratios carbon ( 13 C/ 12 C; δ C), nitrogen N/ 14 N;...
Abstract Europe is expected to experience major climatic shifts during the 21st century but impact on agricultural productivity from such changes uncertain. Here, we combine proxy, instrumental, and model data assess interannual multi‐centennial in central European agroclimate over past 2,000 years projections into near future. Whereas early conditions are rare not fully unprecedented, more than half of area that was considered highly productive throughout Common Era currently falls outside...
Minimizing the impact of heat and drought on crop yields requires varieties with effective protective mechanisms. We tested hypothesis that even a short-term high temperature amplifies negative effects reduced water availability leaf gas-exchange, but can induce long-lasting improvement in plant water-use efficiency after stress period. Accordingly, three common winter wheat (Triticum aestivum) were grown under field conditions. During stem extension, plants exposed to distinct temperatures...
Tree-ring stable isotopes are typically measured in latewood cellulose to mitigate potential carry-over effects from previous year storage pools. The isotopic composition of individual tree-ring segments is thought include considerable intra-annual variability. This sampling strategy may be complicated by steep isotope gradients that can rival the inter-annual variability, however. Consistent material not always possible due low sample availability or high prevalence narrow rings amounts...
Sitka spruce has been one of the most planted tree species in Iceland since mid-twentieth century. Here, we use different dendrochronological methods to identify controlling climatic factors its growth and possible changes their influence over time. We develop annually resolved absolutely dated measurements tree-ring width (TRW) from 21 trees oxygen (δ18O) carbon (δ13C) stable isotopes six evaluate trends climate sensitivity Iceland’s Hallormsstaður National Forest past 54 years (1965–2018)....
The frequency, intensity, and length of droughts have increased with the ongoing climate change threaten stability various ecosystems, including forests. To face this increasing pressure, novel techniques are needed to assess performance tree seedlings survival under drought stress. We tested effect two potentially protective treatments, crown reduction (CR) hydrogel (H) amendment, on pot-grown sessile oak Norway spruce one-year nonterminal physiological response at leaf/shoot level was...
The efficiency of water use in plants, a critical ecophysiological parameter closely related to and carbon cycles, is essential for understanding the interactions between plants their environment. This study investigates effects ongoing climate change increasing atmospheric CO2 concentration on intrinsic (stomata-based; iWUE) evaporative (transpiration-based; eWUE) oak trees along natural altitudinal gradient (130–630 m a.s.l.) eastern Slovakia, Central Europe. To assess changes iWUE eWUE...