Dendrochronologia最新文献

{"title":"Tree rings indicate hazards related to a waterside landslide in the Northern Apennines, Italy – A preliminary step towards forecasting landslides and related tsunami","authors":"Ireneusz Malik ,&nbsp;Michael Maerker ,&nbsp;Małgorzata Wistuba ,&nbsp;Elżbieta Gorczyca ,&nbsp;Patrizio Torrese ,&nbsp;Manuel La Licata ,&nbsp;Yang Yu ,&nbsp;Beata Woskowicz-Ślęzak ,&nbsp;Anna Bieniasz","doi":"10.1016/j.dendro.2025.126379","DOIUrl":"10.1016/j.dendro.2025.126379","url":null,"abstract":"<div><div>We analysed landslide activity on a slope above the Lago di Trebecco reservoir (Northern Apennines, Italy) and indicated a hazard of future destructive landslide reactivation. We used dendrochronology in a variant of eccentric growth analysis to indicate the hazard of sudden slope failure, which could reach the water reservoir and form a tsunami. We use the previous pattern of eccentric growth of trees, found in the case of two landslides reactivated in a landslide catastrophe in Poland in 2010. Before the disaster, trees formed a specific eccentric growth pattern which preceded and can predict landslide catastrophe (sudden slope failure). This pattern was compared to trees growing on the Lago di Trebecco landslide to estimate the hazard of future destructive landslide occurrence. Trees sampled on the landslide above the Lago di Trebecco have recorded a gradual increase in activity over the last few decades. This means the landslide has become increasingly active. On the other hand, in the last two years, a significant decrease in landslide activity has been recorded on the Lago di Trebecco landslide; activity of landslides located in Poland increased significantly two years before the landslide catastrophe in 2010. This means no dendrochronological records indicate that the Lago di Trebecco landslide will be triggered in a short time, but the landslide should be monitored because of the increasing activity over the past decades. Dendrochronology can be a useful indicator for the hazard of a landslide catastrophe (sudden slope failure), which can enter lakes and induce tsunamis.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126379"},"PeriodicalIF":2.7,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tree-ring based growth modelling to aid timber management of congeneric Aspidosperma and Handroanthus species along a seasonal tropical forest gradient","authors":"José Roberto Vieira Aragão ,&nbsp;Peter Groenendijk","doi":"10.1016/j.dendro.2025.126377","DOIUrl":"10.1016/j.dendro.2025.126377","url":null,"abstract":"<div><div>Tropical dry forests (TDF) are vital carbon sinks, yet they are increasingly threatened by the effects of climate and land-use activities. In Brazil, law-based management practices in these forests do not ensure the sustainable use of these ecosystems, leaving them highly vulnerable. Here we use tree-ring widths to calculate cumulative diameter growth and estimate the ages at which trees congeneric species of <em>Aspidosperma</em> and <em>Handroanthus</em> reach the minimum logging diameter (MLD) across a gradient TDF types in northeastern Brazil (evergreen forest, savanna, and dry forests). Using the Growth-Oriented Logging (GOL) approach, we estimated the optimized MLD and logging-cycle length for each species from the current and mean annual increment curves for each species. Finally, we modeled tree-growth trajectories of each species and simulated timber yields at the next logging cycle under different scenarios (by law, by GOL, and in more stringent scenarios). Our results demonstrate that species from dry forests exhibit the slowest growth rates and the longest recovery times compared to species in other forest types. Only <em>Aspidosperma castroanum</em> from the evergreen forest approached sustainable yield levels under our simulations (∼80 %), while yields for the other species were much lower (10–30 %). These findings emphasize the need for forest management practices that account for tree growth variations between species and forest types. The prospects for sustainably extracting timber in the dry forests are bleak and a combination of increased logging cycle lengths and lower logging intensities are needed to ensure that timber stocks in these forests are not overexploited.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126377"},"PeriodicalIF":2.7,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of historical industrial air pollution on European beech trees in Transylvania, Romania","authors":"Cosmin Ilie Cuciurean,&nbsp;Cristian Gheorghe Sidor,&nbsp;Mihai Lupescu","doi":"10.1016/j.dendro.2025.126376","DOIUrl":"10.1016/j.dendro.2025.126376","url":null,"abstract":"<div><div>Air pollution significantly endangers forest ecosystems, particularly in cities. As urbanization and industrial activities continue to expand, air quality has decline because of the release of various pollutants from sources like burning fossil fuels, non-ferrous metal processing, mining activities, and increasing road traffic. Our study sites were located in the Copșa Mică area, which was once one of the most heavily industrialized and polluted cities in Europe. We employed a dendrochronological approach to evaluate the effects of pollution on trees, as tree rings can preserve long-term records of environmental changes, including both climate variability and pollution. This information is reflected in the width and chemical composition of the tree rings. This study aims to assess and quantify the negative spatial and temporal effects of local industrial pollution on European beech (<em>Fagus sylvatica</em> L.) trees. The study quantifies the effects of pollution by measuring radial growth losses in trees affected. Additionally, it examines how local industrial pollution influences the relationship between climatic factors and tree growth, depending on the extent of pollution damage. The period between 1955 and 1990, during which European beech trees were exposed to high levels of air pollution, coincides with the operation of polluting industrial units in the region. During this time, trees in the intensively polluted area experienced growth losses of 31.7 % compared to those in unpolluted area, measured by both tree ring width and basal area increment. Radial growth rates around 1990 reveal that trees in the intensively polluted area had a significant increase in growth compared to trees located in moderate and unpolluted areas. This radial growth spurt is attributed to the substantial reduction in pollution levels after 1990. Additionally, the negative effects of air pollution on the dendroclimatic response of trees were evident. In the period 1955–2000 trees in the intensively polluted area exhibited a distinct dendroclimatic response compared to those located in unpolluted areas. In particular, trees in the polluted area showed a negative response to variations in both precipitation and monthly temperature.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126376"},"PeriodicalIF":2.7,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tracing aphid infestations through wood anatomical markers: Insights from Rhododendron campanulatum D.Don of the Himalayan region","authors":"Mohit Phulara ,&nbsp;Magdalena Opała-Owczarek ,&nbsp;Piotr Owczarek ,&nbsp;Alexander Bast ,&nbsp;Indra Dutt Bhatt ,&nbsp;Holger Gärtner","doi":"10.1016/j.dendro.2025.126374","DOIUrl":"10.1016/j.dendro.2025.126374","url":null,"abstract":"<div><div>Recent climatic shifts have led to a noticeable increase in temperatures across the high-altitude ecosystems of the Himalayas, particularly in winter. This warming is altering growing conditions for many species, including aphids, found at higher altitudes where they were previously rare. As air temperatures increase, aphids develop more rapidly, extending their active periods and winter survival, and changing their geographical distribution and abundance. In this study, we analyzed the anatomical structure of <em>Rhododendron campanulatum</em> D.Don tree rings to detect aphid infestations in the higher elevational range of the Himalayas. Microscopic examination of wood sections from branches and increment cores from the main trunk revealed sapwood alterations caused by aphid activities. Our findings indicate that aphid activity was observed at elevations ranging from 3100 to 3400 m a.s.l., with a marked preference for younger trees (≤ 22 years) over mature ones (&gt; 22 years) beyond a certain developmental stage. This suggests that aphid infestations are significantly more frequent and severe during the early life stages of the host trees, highlighting a vulnerability in younger individuals that diminishes with age. Hence, the pattern of aphid infestation is influenced not solely by rising temperatures, as previously assumed, nor is it significantly affected by altitude changes. Instead, it is notably impacted by the age of the samples. These anatomical markers highlight the impact of aphids and broader ecological shifts affecting plant resilience and forest health. Thus, this study urges collaboration among wood anatomists, entomologists, and ecologists to understand aphid life cycles, host preferences, and ecological interactions in the Himalayas. These findings are crucial for biodiversity conservation in the region and could affect ecological management strategies in other mountain regions worldwide.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126374"},"PeriodicalIF":2.7,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Warming aggravates physiological drought in Betula platyphylla during the winter–spring transitional period in Greater Khingan Mountains","authors":"Feng Li ,&nbsp;Wenjun Sun ,&nbsp;Junxia Li ,&nbsp;Xin Gao ,&nbsp;Tsun Fung Au ,&nbsp;Zhenju Chen","doi":"10.1016/j.dendro.2025.126375","DOIUrl":"10.1016/j.dendro.2025.126375","url":null,"abstract":"<div><div>Tree growth is highly susceptible to hydrothermal changes during winter-spring transition, particularly in cold-temperate regions while short-term climatic fluctuations could play a primary role in inter-annual growth dynamics. To unravel this mechanism, we focused on <em>Betula platyphylla</em>, a key companion and pioneer species in <em>Larix–Betula</em> forests in the Greater Khingan Mountains. Using dendrochronology methods, we investigated warming impacts on its radial growth during winter-spring transition (February–April) based on short-term 10-day climate data. Here, we showed warming exacerbated physiological drought by intensifying snowmelt and soil freeze-thaw cycles, disrupting water balance and therefore suppressing tree growth. The temperature threshold (∼4.0°C) for triggering tree growth advanced by 0.4 days/year since 1990, which in turn intensified pre-monsoon drought stress. Although freeze-thaw water dominated pre-monsoon growth, the tree growth was threatened by warming-induced soil hydrological changes. Our study highlights that winter-spring warming may constrain boreal forest carbon sequestration through intensified water stress, urging attention to non-growing season climatic controls on tree growth.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126375"},"PeriodicalIF":2.7,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regional NDVI reconstruction based on tree-ring width of Pinus massoniana Lamb. in the north-south transition zone of China","authors":"Kunyu Peng ,&nbsp;Yameng Liu ,&nbsp;Keyu Zhang ,&nbsp;Jiaxin Li ,&nbsp;Jinkuan Li ,&nbsp;Xiaoxu Wei ,&nbsp;Mengyu Wang ,&nbsp;Jianfeng Peng","doi":"10.1016/j.dendro.2025.126373","DOIUrl":"10.1016/j.dendro.2025.126373","url":null,"abstract":"<div><div>Short-term observational records of the normalized difference vegetation index (NDVI) limit the understanding of climate-driven changes in vegetation productivity and impacts in the context of global warming. The Tongbai Mountains are located in the north-south transitional zone of China and represent the northern boundary of <em>Pinus massoniana</em> Lamb. In this study, we employed the earlywood width (EWW), latewood width (LWW) and total ring width (TRW) chronologies of the existing <em>P. massoniana</em> to investigate the relationships of these chronologies with climate factors and NDVI, and found that tree growth showed significant positive correlations with temperature in March and April and with NDVI in April, May and June. The most significant positive correlations between TRW/EWW/LWW and NDVI in current June (0.79, 0.8, 0.76; <em>p</em> &lt; 0.001) were used for reconstruction since 1929 or 1930. Based on the EWW chronology, one linear regression function accounted for 63.7 % of the variance during 1982–2018 and tracked the observed data well. There were 13 dense and 13 sparse vegetation coverage years (both accounting for 14.13 %), and two dense and two sparse vegetation periods after 11-year smoothing of the reconstructed series. Comparing the reconstructed series with the warm season temperatures, we found that the vegetation coverage in early summer is mainly controlled by the temperature. Spectral analysis revealed that the vegetation cover variations mainly exist 2–3a (<em>p</em> &lt; 0.01) cycle, which may potentially reflect the connection between regional NDVI change and the Quasi-Biennial Oscillation (QBO). Our results are of great significance to long-term prediction and management of dynamic vegetation cover change in the north-south transitional zone of China.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126373"},"PeriodicalIF":2.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative analysis of wood anatomy of European larch, Norway spruce, and European beech in mixed and monoculture stands under contrasting climatic conditions","authors":"Viktória Pipíšková ,&nbsp;Angela Balzano ,&nbsp;Soham Basu ,&nbsp;Maks Merela ,&nbsp;Pavel Bednář ,&nbsp;Jan Světlík","doi":"10.1016/j.dendro.2025.126364","DOIUrl":"10.1016/j.dendro.2025.126364","url":null,"abstract":"<div><div>We present a tree-ring and wood-anatomical study of less widespread European larch (<em>L. decidua</em>) growing in mixed a monoculture stands with the economically important Norway spruce (<em>P. abies</em>) and European beech (<em>F. sylvatica</em>) under identical meteorological conditions in the Czech highlands. Tree responses to drought were assessed by comparing two contrasting periods: Control period (2009–2010) and a Dry period (2017–2018). We analysed tree-ring widths (<em>TRW</em>), early- and latewood widths (<em>EWW/LWW</em>), lumen area (<em>LA</em>), cell wall thickness (<em>CWT</em>), cell density (<em>CD</em>), relative conducting area (<em>RCTA</em>), hydraulically weighted mean cell diameter (<em>D</em>_<em>h</em>), and the potential hydraulic conductivity (<em>K</em>_<em>p</em>). A significant reduction in radial growth (51.8 %) was observed during the Dry period, with spruce and beech showing the greatest decline in monocultures, while larch exhibited mostly non-significant changes. Although <em>TRW</em> did not differ significantly between mixtures and monocultures within species, notable variations emerged at the wood-anatomical level. Tree species generally showed reduced anatomical variability and more stable water conductivity mostly in mixed stands under dry conditions. However, drought impacts were more pronounced in larger trees and denser stands, suggesting that forest structure can amplify vulnerability to water stress. Species-specific drought responses were distinct: larch showed no anatomical changes; spruce exhibited the greatest reduction in latewood lumen area and cell wall thickness; and beech reduced lumen area while increasing cell density, enhancing water transport efficiency under prolonged drought.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126364"},"PeriodicalIF":2.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144203468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Consistent summer temperature signals in a latewood blue intensity network from the upper tree line in the Caucasus","authors":"Rupesh Dhyani ,&nbsp;Dario Martin-Benito ,&nbsp;Mehmet Doğan ,&nbsp;Revaz Kvaratskhelia ,&nbsp;Nesibe Köse ,&nbsp;Hüseyin Tuncay Güner ,&nbsp;Lea Schneider","doi":"10.1016/j.dendro.2025.126372","DOIUrl":"10.1016/j.dendro.2025.126372","url":null,"abstract":"<div><div>Climate variability in the Caucasus region significantly influences tree growth in alpine tree line ecotones. However, long-standing human land-use history disrupted the natural equilibrium between montane forests and alpine meadows. These complex vegetation dynamics may cause traditional proxies such as tree-ring width (TRW) to display a weak climate signal, limiting their utility for understanding growth-climate relationships. To address these challenges, we established a multispecies network of seven tree ring width index (TRWI) and seven latewood blue intensity (LWBI) chronologies from three coniferous species (<em>Picea orientalis</em>, <em>Abies nordmanniana</em> and <em>Pinus sylvestris</em>) at current tree line sites (1900–2300 masl) in the Greater and Lesser Caucasus. Our results show that almost all the LWBI site chronologies demonstrate consistent and stable correlation with summer temperature (June-August). In contrast, corresponding TRWI chronologies reveal much weaker correlations with temperature, mainly with previous winter and spring. TRWI moderately responds to precipitation during the summer (JJA) while LWBI does not show any significant response to precipitation. The weaker and less consistent temperature signals in TRWI chronologies suggest additional influence of precipitation, non-climatic factors and local disturbance events on TRWI. Principal component analysis reveals a robust common signal in the LWBI network. First principal components from both proxies correlate with summer temperatures, although correlation is much higher for LWBI than for TRWI. The stable and consistent relationship between LWBI and summer temperature in different frequency domains indicates high potential of this proxy for annually resolved climate reconstructions at a regional level, which would be new for the Lesser Caucasus region.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126372"},"PeriodicalIF":2.7,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stable carbon and oxygen isotope ratios in Norway spruce (Picea abies (L.) Karst.) tree rings along an elevation gradient in the Rarau Mts. (Romania)","authors":"Daniela Maria Llanos-Campana ,&nbsp;Zoltan Kern ,&nbsp;Ionel Popa ,&nbsp;Aurel Perşoiu","doi":"10.1016/j.dendro.2025.126365","DOIUrl":"10.1016/j.dendro.2025.126365","url":null,"abstract":"<div><div>This study investigates the variations of <em>δ</em>¹³C and <em>δ</em>¹⁸O isotopes in alpha-cellulose extracted from Norway spruce (<em>Picea abies</em> (L.) Karst.) across an altitudinal gradient in the Eastern Carpathians. Results reveal mean <em>δ</em>¹⁸O values decrease with elevation aligning with the altitude effect and indicating influences from source water composition, precipitation dynamics, and evaporative enrichment. In contrast, mean <em>δ</em>¹³C values do not exhibit consistent altitudinal trends, highlighting the impact of local environmental factors like water stress and light exposure. In addition, the isotopic composition was correlated with environmental variables such as temperature (maximum and minimum) and precipitation to explore physiological responses of Norway spruce to climate conditions. The correlation between <em>δ</em>¹⁸O values and summer precipitation is weakening, while growing season temperature signal is strengthening towards higher elevations suggesting that the role of available water is diminishing, and ambient temperature is enhancing as approaching the timberline. A weakening trend was found for the negative correlation between <em>δ</em>¹³C values and summer precipitation. The correlation between <em>δ</em>¹³C values and precipitation (negative) and temperature (positive) in the growing period for the low elevation stand points to strong drought stress explained by changes in stomatal conductance during dry and warm conditions. The faint negative correlation with temperature for higher stands can be an indirect response to other direct controlling factors, such as relative humidity which is inversely related to temperature.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126365"},"PeriodicalIF":2.7,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atmospheric mercury pollution recorded in conifer tree rings: Disentangling the effects of tree-ring width, water content, and climate on mercury concentrations","authors":"Katrien Boonen ,&nbsp;Rohan Shetti ,&nbsp;Tomáš Navrátil ,&nbsp;Tereza Nováková ,&nbsp;Jan Rohovec ,&nbsp;Jiří Lehejček","doi":"10.1016/j.dendro.2025.126370","DOIUrl":"10.1016/j.dendro.2025.126370","url":null,"abstract":"<div><div>Mercury (Hg) is a contaminant of major concern for public and ecosystem health, known for its toxicity and bioaccumulation in the environment. Reconstructing past Hg pollution, as well as monitoring current Hg concentrations, is therefore essential. Tree rings offer a valuable archive for reconstructing historical atmospheric Hg pollution, yet the reliability of dendrochemical Hg reconstructions depends on understanding all factors that influence Hg accumulation in the xylem. This study investigated whether factors beyond atmospheric Hg concentrations, i.e., climatic variables (temperature and precipitation), tree-ring width, and water content, influenced Hg concentrations in the tree rings of European larch and Douglas fir growing near a chlor-alkali plant in the Czech city of Ústí nad Labem. Both tree species showed similar long-term trends in Hg concentrations, broadly reflecting historical trends in atmospheric Hg pollution. However, short-term (high-frequency) variability in tree-ring Hg concentrations remaining after detrending was associated with other factors. A positive correlation between water content and Hg concentrations suggested that a fraction of the Hg was retained in xylem sap. In European larch heartwood, Hg concentrations correlated positively with tree-ring width, likely due to heartwood formation processes. In Douglas fir, a positive correlation between August-September precipitation and tree-ring Hg suggested that this tree species’ isohydric behaviour affected Hg uptake. These findings indicated that while tree-ring Hg concentrations can serve as proxies for historical atmospheric Hg pollution, other factors, such as tree-ring width, water content, and late-summer precipitation, may modulate the signal and should be considered in dendrochemical Hg reconstructions.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126370"},"PeriodicalIF":2.7,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}