A5071638332- Tree-ring climate responses
- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Geology and Paleoclimatology Research
- Botany and Plant Ecology Studies
- Historical and Archaeological Studies
- Forest Ecology and Biodiversity Studies
- Ancient and Medieval Archaeology Studies
- Archaeology and ancient environmental studies
- Image Processing and 3D Reconstruction
- Hydrology and Drought Analysis
- Climate variability and models
- Tree Root and Stability Studies
- Wood Treatment and Properties
- Plant responses to elevated CO2
- Archaeological Research and Protection
- Remote Sensing and LiDAR Applications
- Lichen and fungal ecology
- Historical and Cultural Studies of Poland
- Ecology and Vegetation Dynamics Studies
- Climate change and permafrost
- Fire effects on ecosystems
- Wood and Agarwood Research
- Plant biochemistry and biosynthesis
- Climate change impacts on agriculture
Czech Academy of Sciences, Global Change Research Institute
2015-2024
Mendel University in Brno
2015-2024
Czech Geological Survey
2021-2023
St. Anne's University Hospital Brno
2008-2015
Though tree-ring chronologies are annually resolved, their dating has never been independently validated at the global scale. Moreover, it is unknown if atmospheric radiocarbon enrichment events of cosmogenic origin leave spatiotemporally consistent fingerprints. Here we measure 14C content in 484 individual tree rings formed periods 770-780 and 990-1000 CE. Distinct excursions starting boreal summer 774 spring 993 ensure precise 44 records from five continents. We also identify a meridional...
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,...
Temperate forests are undergoing significant transformations due to the influence of climate change, including varying responses different tree species increasing temperature and drought severity. To comprehensively understand full range growth responses, representative datasets spanning extensive site climatic gradients essential. This study utilizes tree-ring data from 550 sites temperate Czechia assess trends six dominant Central European (European beech, Norway spruce, Scots pine, silver...
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)....
The forests of central Europe have undergone remarkable transitions in the past 40 years as air quality has improved dramatically. Retrospective analysis Norway spruce ( Picea abies ) tree rings Czech Republic shows that pollution (e.g. SO 2 concentrations, high acidic deposition to forest canopy) plays a dominant role driving health. Extensive soil acidification occurred highly polluted "Black Triangle" Central Europe, and upper mineral soils are still acidified. In contrast, atmospheric...
ABSTRACT Today, accelerator mass spectrometry (AMS) technology enables us to carry out very precise measurements of radiocarbon ( 14 C). Unfortunately, due fluctuations in the C calibration curve, resulting calibrated time intervals vary from decades up centuries age. Within a scale several decades, we can find on curve which correspond with periods rapid increases atmospheric CO 2 activity. Some these “high slope” parts could be used for fine resolution dating individual samples....
Abstract Although the importance of stable isotope ratios in tree rings is increasing for high‐resolution climate reconstructions, it still unclear if such values exhibit age trends that require some form standardization. Here we present 13,496 and 13,584 annually resolved absolutely dated δ 18 O 13 C measurements from 147 living relict oaks ( Quercus spp.) grew over past 2,000 years Czech Republic. In contrast to their heteroscedastic ring widths, isotopes reveal constant spread versus...
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 Intrinsic water-use efficiency ( iWUE ) of trees is an important component the Earth’s coupled carbon and water cycles. The causes consequences long-term changes in are, however, still poorly understood due to complex interplay between biotic abiotic factors. Inspired by role calcium (Ca) plays plant transpiration, we explore possible linkages tree ring-derived Ca availability five central European forest sites that were affected acidic air pollution. We show increasing was directly...
The research was conducted in selected spruce stands of the Silesian Beskids aged over 70 at altitudes from 403 m a.s.l. to 794 2008. samples were taken and processed compliance with standard dendrochronological methodology. Tree rings measured tree-ring curves synchronized using PAST4 application. age trend removed ARSTAN application climatic influences modelled DendroClim regional chronology shows an obvious decrease radial increment beginning 1970s mid-1990s. gradual increase which...
To enhance our understanding of forest carbon sequestration, climate change mitigation and drought impact on ecosystems, the availability high-resolution annual growth maps based tree-ring width (TRW) would provide a significant advancement to field. Site-specific characteristics, which can be approximated by Earth observation satellites (EOS), emerge as crucial drivers growth, influencing how translates into tree growth. EOS provides information surface reflectance related characteristics...
The impact of atmospheric pollution on the growth European forest tree species, particularly beech, Silver fir and Norway spruce, is examined in five mesic forests Czech Republic. Analyzing basal area increment (BAI) patterns using linear mixed effect models reveals a complex interplay between nitrogen (N) sulphur (S) deposition, climatic variables changing CO
In recent years, a millennia-long oak tree-ring width chronology, consisting of 3194 samples from 387 locations, was developed in the Czech Republic. Despite collection such huge dataset, replication 19th Century very low and natural distribution Republic insufficiently covered by samples, especially Western Bohemia. This study aimed to remove these weaknesses, which have limited paleoclimatic potential this determine number sapwood rings, is crucial for dendrochronological dating....
Oak (Quercus spp.) response to climate differs more among sites
CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 70:133-141 (2016) - DOI: https://doi.org/10.3354/cr01402 Recent growth coherence in long-term oak (Quercus spp.) ring width chronologies Czech Republic Petr Dobrovolný1,2,*, Michal Rybníček2,3, Ulf Büntgen2,4,5, Miroslav Trnka2,6, Rudolf Brázdil1,2, Zdenĕk Stachŏn1, Ondˇrej Prokop3, Tomáš Kolář2,3 1Department of Geography, Masaryk...
ABSTRACT This contribution presents a near‐millennium‐long reconstruction of May–July (MJJ) precipitation for Bohemia, the western part recent Czech Republic. A well‐replicated chronology oak ( Quercus spp.) tree‐ring width (TRW) measurements covering 1040–2013 period was employed as high‐resolution hydroclimatic proxy. Standardized TRW indices were calibrated to selected grid points from CRU database, geographical distribution data used. The explains 34% MJJ variability during 1901–1980...
Abstract. It is generally accepted that anthropogenic-induced climate change may affect the frequency and intensity of hydrological extremes, together with a variety subsequent impacts on ecosystems human society. Proxy records are absolutely dated annually resolved indispensable to better understanding temporal changes in occurrence floods droughts. This contribution presents new data set 3194 oak (Quercus spp.) ring width samples from living trees historical timbers, collected across Czech...
Ring-width series are important for diverse fields of research such as the study past climate, forest ecology, genetics, and determination origin (dendro-provenancing) or dating archaeological objects. Recent suggests diverging climate-growth relationships in tree-rings due to cardinal direction extracting tree cores (i.e. direction-specific effect). This presents an understudied source bias that potentially affects many data sets tree-ring research. In this study, we investigated possible...