A5036305451- Tree-ring climate responses
- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Ecology and Vegetation Dynamics Studies
- Climate variability and models
- Geology and Paleoclimatology Research
- Species Distribution and Climate Change
- Forest Insect Ecology and Management
- Hydrology and Sediment Transport Processes
- Wood and Agarwood Research
- Geological and Geochemical Analysis
- Plant and animal studies
- Forest Ecology and Biodiversity Studies
- African Botany and Ecology Studies
- Environmental Conservation and Management
- Plant Ecology and Soil Science
- Environmental Science and Technology
- Geological and Geophysical Studies
- Landslides and related hazards
- Geological and Tectonic Studies in Latin America
- Forest Management and Policy
- Fire effects on ecosystems
- Plant Physiology and Cultivation Studies
- Astro and Planetary Science
- Botany and Geology in Latin America and Caribbean
Swiss Federal Institute for Forest, Snow and Landscape Research
2014-2025
Oeschger Centre for Climate Change Research
2014-2025
University of Bern
2014-2025
University of Arizona
2016-2020
Tree-rings offer one of the few possibilities to empirically quantify and reconstruct forest growth dynamics over years millennia. Contemporaneously with growing scientific community employing tree-ring parameters, recent research has suggested that commonly applied sampling designs (i.e. how which trees are selected for dendrochronological sampling) may introduce considerable biases in quantifications responses environmental change. To date, a systematic assessment consequences design on...
Abstract The growth of past, present, and future forests was, is will be affected by climate variability. This multifaceted relationship has been assessed in several regional studies, but spatially resolved, large-scale analyses are largely missing so far. Here we estimate recent changes 5800 beech trees ( Fagus sylvatica L.) from 324 sites, representing the full geographic climatic range species. Future trends were predicted considering state-of-the-art scenarios. validated models indicate...
Abstract Climate−tree growth relationships recorded in annual rings have recently been the basis for projecting climate change impacts on forests. However, most trees and sample sites represented International Tree-Ring Data Bank (ITRDB) were chosen to maximize signal are characterized by marginal growing conditions not representative of larger forest ecosystem. We evaluate magnitude this potential bias using a spatially unbiased tree-ring network collected USFS Forest Inventory Analysis...
Abstract. Measurements of the stable carbon isotope ratio (δ13C) on annual tree rings offer new opportunities to evaluate mechanisms variations in photosynthesis and stomatal conductance under changing CO2 climate conditions, especially conjunction with process-based biogeochemical model simulations. The isotopic discrimination is indicative between partial pressure intercellular cavities atmosphere (ci∕ca) assimilation conductance, termed intrinsic water-use efficiency (iWUE). We performed...
Abstract A central challenge in global change research is the projection of future behavior a system based upon past observations. Tree‐ring data have been used increasingly over last decade to project tree growth and forest ecosystem vulnerability under climate conditions. But how can response variation predict future, when does not look like past? Space‐for‐time substitution (SFTS) one way overcome problem extrapolation: at given location warmer assumed follow today. Here we evaluated an...
Robust ecological forecasting of tree growth under future climate conditions is critical to anticipate forest carbon storage and flux. Here, we apply three ingredients that are key improving forecast skill: data fusion, confronting model predictions with new data, partitioning uncertainty. Specifically, present the first fusion tree-ring inventory within a Bayesian state-space at multi-site, regional scale, focusing on Pinus ponderosa var. brachyptera in southwestern US. Leveraging...
Tree growth varies closely with high–frequency climate variability. Since the 1930s detrending data prior to comparing them tree has been shown better capture sensitivity climate. However, in a context of increasingly pronounced trends climate, this practice remains surprisingly rare dendroecology. In review Dendrochronologia over 2018–2021 period, we found that less than 20 % dendroecological studies detrended climate-growth analyses. With an illustrative study, want remind dendroecology...
Abstract The response of forest growth to climate variability varies along environmental gradients. A increase and decrease with warming is usually observed in cold‐humid warm‐dry regions, respectively. However, it remains poorly known where the sign these temperature effects switches. Here we introduce a newly developed European tree ring network that has been specifically collected reconstruct aboveground biomass increment (ABI). We quantify, how long‐term (1910–2009) interannual ABI...
Ongoing climate warming is increasing evapotranspiration, a process that reduces plant-available water and aggravates the impact of extreme droughts during growing season. Such an exceptional hot drought occurred in Central Europe 2018 caused widespread defoliation mid-summer European beech (Fagus sylvatica L.) forests. Here, we recorded crown damage 2021 nine mature even-aged beech-dominated stands northwestern Switzerland along severity gradient (low, medium, high) analyzed tree-ring...
The "two-third spline" (2/3S) is a frequently applied method to detrend tree-ring series. It fits spline with 50% frequency cutoff at equal two-thirds of each sample length in dataset. was introduced ensure minimum loss low-frequency variance, which resolvable during the detrending ring-width In this paper I show potential problems that arise when rusing method. 2/3S runs counter strengths using digital filter – i.e. one giving up full control over frequency-removing characteristics growth...
Tree-ring time series provide long-term, annually resolved information on the growth of trees. When sampled in a systematic context, tree-ring data can be scaled to estimate forest carbon capture and storage landscapes, biomes, and-ultimately-the globe. A effort sample tree rings national inventories would yield unprecedented temporal spatial resolution dynamics help resolve key scientific uncertainties, which we highlight terms evidence for greening (enhanced growth) versus browning...
Abstract Drought legacies in radial tree growth are an important feature of variability biomass accumulation and widely used to characterize forest resilience climate change. Defined as a deviation from normal growth, the statistical significance legacy effects depends on definition “normal”—expected under average conditions—which has not received sufficient scrutiny. We re‐examined effect analyses using International Tree‐Ring Data Bank (ITRDB) then produced synthetic tree‐ring data...
Abstract Scots pine ( Pinus sylvestris L.) is a common European tree species, and understanding its acclimation to the rapidly changing climate through physiological, biochemical or structural adjustments vital for predicting future growth. We investigated long‐term irrigation experiment at naturally dry forest in Switzerland, comparing trees that have been continuously irrigated 17 years ) with those which was interrupted after 10 stop non‐irrigated control ), using growth, xylogenesis,...
The future performance of the widely abundant European beech (Fagus sylvatica L.) across its ecological amplitude is uncertain. Although considered drought-sensitive and thus negatively affected by drought events, scientific evidence indicating increasing vulnerability under climate change on a cross-regional scale remains elusive. While evaluating changes in sensitivity secondary growth offers promising avenue, studies from productive, closed-canopy forests suffer knowledge gaps, especially...
ABSTRACT With ongoing global warming, increasing water deficits promote physiological stress on forest ecosystems with negative impacts tree growth, vitality, and survival. How individual species will react to increased drought is therefore a key research question address for carbon accounting the development of climate change mitigation strategies. Recent tree‐ring studies have shown that trees at higher latitudes benefit from warmer temperatures, yet this likely highly species‐dependent...
Introduction Quantitative wood anatomy is critical for establishing climate reconstruction proxies, understanding tree hydraulics, and quantifying carbon allocation. Its accuracy depends upon the image acquisition methods, which allows identification of number dimensions vessels, fibres, tracheids within a ring. Angiosperm analysed with variety different including surface pictures, anatomical micro-sections, or X-ray computed micro-tomography. Despite known advantages disadvantages,...
Drought significantly affects the growth and physiological responses of Zagros forests, one most important natural habitats in Iran. The Brants oak (Quercus brantii Lindl), a widely distributed dominant tree species Central Mountains western Iran, serves as valuable archive for studying historical climate variability ecological changes. For climate-growth analysis, 30 Q. trees cored from Lordegan area (1820 to 2280 m a.s.l.) southwest forests After preparing samples, measuring ring widths...
Abstract Tree rings are crucial for reconstructing past climates, with maximum latewood density (MXD) as a key metric. However, wood integrity is critical accurate MXD‐based reconstructions, raising concerns when using potentially degraded relict wood. Quantitative anatomy (QWA) provides morphometric alternative. We compared X‐ray and QWA‐derived measurements from recent five‐millennia‐old Siberia's Yamal region. measured bulk holo‐cellulose‐to‐wood ratio employed spectroscopic analyses to...