Pub Date : 2025-12-10DOI: 10.1016/j.dendro.2025.126462
Alar Läänelaid , Juhan Kilumets , Andres Uueni , Paul Borghaerts
An ancient door in the St. Mary's Cathedral in Tallinn underwent dendrochronological analysis. The door's construction consists of two vertical pine planks connected by two inclined bars. The outer side of the door is covered with horizontal oak planks and bordered on one edge with a vertical bar. The analysis yielded two different dates: the pine plank was dated to 1291 AD terminus post quem and the oak planks to 1376 AD tpq. No sapwood edge was identified on the oak planks, but up to six sapwood rings were preserved on some oak boards. The resulting chronological discrepancy necessitated the investigation of a possible secondary use of the door or a simultaneous construction. According to several features of the joinery, this is a door whose planks were made at the same time. The door was most likely made between 1378 and 1394 AD. This item is probably the oldest surviving door in Estonia.
{"title":"Investigating the age of the door of the King’s Chapel in Tallinn Dome","authors":"Alar Läänelaid , Juhan Kilumets , Andres Uueni , Paul Borghaerts","doi":"10.1016/j.dendro.2025.126462","DOIUrl":"10.1016/j.dendro.2025.126462","url":null,"abstract":"<div><div>An ancient door in the St. Mary's Cathedral in Tallinn underwent dendrochronological analysis. The door's construction consists of two vertical pine planks connected by two inclined bars. The outer side of the door is covered with horizontal oak planks and bordered on one edge with a vertical bar. The analysis yielded two different dates: the pine plank was dated to 1291 AD <em>terminus post quem</em> and the oak planks to 1376 AD tpq. No sapwood edge was identified on the oak planks, but up to six sapwood rings were preserved on some oak boards. The resulting chronological discrepancy necessitated the investigation of a possible secondary use of the door or a simultaneous construction. According to several features of the joinery, this is a door whose planks were made at the same time. The door was most likely made between 1378 and 1394 AD. This item is probably the oldest surviving door in Estonia.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"95 ","pages":"Article 126462"},"PeriodicalIF":2.3,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737502","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}
Pub Date : 2025-12-09DOI: 10.1016/j.dendro.2025.126463
Bulat F. Khasanov , Maxim Yermokhin , Vitali Lukin , Natallia Knysh , Toshio Nakamura , Mitsuru Okuno , Oleg L. Petrov , Arkady B. Savinetsky
Although subfossil oaks preserved in alluvial deposits represent an invaluable archive of dendrochronological information, Eastern Europe has remained largely unexplored in this regard. In this study, we investigated subfossil oak remains from the Zapadnaya Dvina (Daugava, Dzvina) River, flowing through Russia, Belarus, and Latvia. Subfossil oak trunks were collected from two sites located in the upper (near the town of Zapadnaya Dvina, Russia) and middle (the Luchosa River, Belarus) reaches of the Zapadnaya Dvina River, comprising 545 and 68 specimens, respectively. A total of 61 radiocarbon dates were obtained from both sites. The earliest subfossil oak was deposited 5800 ± 80C years BP, while the most recent samples dates to the 20th century. Four absolutely dated tree-ring chronologies spanning 250–1762 AD were developed through dendrochronological analysis and cross-dating with oak chronologies from neighboring regions. These chronologies were further validated by wiggle-matching radiocarbon measurements of individual tree rings. In addition, six floating tree-ring chronologies covering the 2nd and 1st millennia BC were constructed and radiocarbon dated. Together, these chronologies encompass nearly the last 4000 years, with only short gaps of up to 300 years. Continued sampling of subfossil oaks from riverine deposits in the region is expected to bridge these intervals, ultimately enabling the construction of an absolutely dated multi-millennial oak tree-ring chronology for Eastern Europe.
{"title":"Paleoenvironmental perspective of subfossil oaks from the Zapadnaya Dvina River","authors":"Bulat F. Khasanov , Maxim Yermokhin , Vitali Lukin , Natallia Knysh , Toshio Nakamura , Mitsuru Okuno , Oleg L. Petrov , Arkady B. Savinetsky","doi":"10.1016/j.dendro.2025.126463","DOIUrl":"10.1016/j.dendro.2025.126463","url":null,"abstract":"<div><div>Although subfossil oaks preserved in alluvial deposits represent an invaluable archive of dendrochronological information, Eastern Europe has remained largely unexplored in this regard. In this study, we investigated subfossil oak remains from the Zapadnaya Dvina (Daugava, Dzvina) River, flowing through Russia, Belarus, and Latvia. Subfossil oak trunks were collected from two sites located in the upper (near the town of Zapadnaya Dvina, Russia) and middle (the Luchosa River, Belarus) reaches of the Zapadnaya Dvina River, comprising 545 and 68 specimens, respectively. A total of 61 radiocarbon dates were obtained from both sites. The earliest subfossil oak was deposited 5800 ± 80C years BP, while the most recent samples dates to the 20th century. Four absolutely dated tree-ring chronologies spanning 250–1762 AD were developed through dendrochronological analysis and cross-dating with oak chronologies from neighboring regions. These chronologies were further validated by wiggle-matching radiocarbon measurements of individual tree rings. In addition, six floating tree-ring chronologies covering the 2nd and 1st millennia BC were constructed and radiocarbon dated. Together, these chronologies encompass nearly the last 4000 years, with only short gaps of up to 300 years. Continued sampling of subfossil oaks from riverine deposits in the region is expected to bridge these intervals, ultimately enabling the construction of an absolutely dated multi-millennial oak tree-ring chronology for Eastern Europe.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"95 ","pages":"Article 126463"},"PeriodicalIF":2.3,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737503","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}
We present a continuous 2000-year ring-width chronology of Chamaecyparis from central Japan based on samples of known provenance. The dataset integrates ring-width series from living trees, archaeological coffins, historical temple timbers, and a buried forest, spanning 156 BCE to 2012 CE. Crossdating, conducted using statistical indices (Student’s t-value, Gleichläufigkeit) and visual inspection, yielded high consistency across six partial chronologies. This composite chronology, filling a major gap in Japanese dendrochronology, yielded a robust regional reference for environmental reconstruction and dendroprovenancing. Application to historical structures, including Rinno-ji and Daitoku-ji Temples, demonstrated excellent agreement with documentary records, confirming the chronology’s dating precision. Our findings reaffirm the values of ring-width analysis for determining the origin and age of wooden materials, particularly in contexts where isotopic geographical resolution may be too broad. This chronology also establishes a robust framework for future multiproxy studies that integrate isotopic or geochemical data. By securing both temporal continuity and provenance control, it serves as a critical resource for research in archaeology, forest history, and cultural heritage science in Japan and beyond.
{"title":"A two-millennia provenance-assured Chamaecyparis tree-ring chronology for central Japan","authors":"Motonari Ohyama , Hitoshi Yonenobu , Yasuharu Hoshino , Shin’ya Suzuki","doi":"10.1016/j.dendro.2025.126461","DOIUrl":"10.1016/j.dendro.2025.126461","url":null,"abstract":"<div><div>We present a continuous 2000-year ring-width chronology of <em>Chamaecyparis</em> from central Japan based on samples of known provenance. The dataset integrates ring-width series from living trees, archaeological coffins, historical temple timbers, and a buried forest, spanning 156 BCE to 2012 CE. Crossdating, conducted using statistical indices (Student’s <em>t</em>-value, Gleichläufigkeit) and visual inspection, yielded high consistency across six partial chronologies. This composite chronology, filling a major gap in Japanese dendrochronology, yielded a robust regional reference for environmental reconstruction and dendroprovenancing. Application to historical structures, including Rinno-ji and Daitoku-ji Temples, demonstrated excellent agreement with documentary records, confirming the chronology’s dating precision. Our findings reaffirm the values of ring-width analysis for determining the origin and age of wooden materials, particularly in contexts where isotopic geographical resolution may be too broad. This chronology also establishes a robust framework for future multiproxy studies that integrate isotopic or geochemical data. By securing both temporal continuity and provenance control, it serves as a critical resource for research in archaeology, forest history, and cultural heritage science in Japan and beyond.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"95 ","pages":"Article 126461"},"PeriodicalIF":2.3,"publicationDate":"2025-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737504","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}
Pub Date : 2025-12-02DOI: 10.1016/j.dendro.2025.126460
Yuqi Jia , Yihua Ren , Guofu Song , Guohong Li
This study examined the seasonal and diurnal dynamics and the radial growth’s environmental response mechanisms of Abies georgei var. Smithii on the Sygera Mountain, southeastern Xizang. Continuous dendrometer monitoring (November 2023–November 2024) and concurrent meteorological data from automated weather stations were analyzed using the zero-growth method to quantify stem radial variation. Key findings include:(1) Diurnal radial variations during the growing season displayed a circadian rhythm characterized by daytime contraction and nocturnal expansion.(2) Seasonal growth dynamics comprised of four phases: dormant period (November–February), initiation period (March–April), rapid growth period (May–August), and decline period (September–October). Annual cumulative growth attained 8–12 mm, with peak rates (0.035 mm/d) observed in June.(3) At diurnal scales, soil temperature and moisture content showed dominant positive correlations with radial growth during the early growing season, while vapor pressure deficit (VPD) became the primary moisture stress factor during rapid growth, exhibiting significant positive correlations with radial expansion. Seasonal-scale growth exhibited greater sensitivity to temperature fluctuations than to other environmental variables. This work reveals the adaptive strategy of Abies georgei var. Smithii to alpine environments through daily-scale water regulation and seasonal-scale resource allocation, providing essential scientific evidence for refining carbon sink models and evaluating ecological barrier functions on the Qinghai-Xizang Plateau
研究了西藏东南部锡格拉山乔治冷杉（Abies georgei var. Smithii）的季节、日动态及其径向生长的环境响应机制。对2023年11月至2024年11月的连续测树仪监测数据和同期自动气象站的气象数据进行了分析，采用零增长方法量化了树干径向变化。主要发现包括：(1)生长季节的日辐射变化表现出白天收缩和夜间扩张的昼夜节律特征。(2)季节生长动态分为休眠期（11 ~ 2月）、发育期（3 ~ 4月）、快速生长期（5 ~ 8月）和衰退期（9 ~ 10月）四个阶段。年累积生长量达到8-12 mm， 6月份达到峰值（0.035 mm/d）。(3)在日尺度上，土壤温度和水分含量在生长初期与径向生长呈显著正相关，而在快速生长阶段，水汽压亏缺（VPD）成为主要的水分胁迫因子，与径向扩张呈显著正相关。季节尺度的增长对温度波动的敏感性高于其他环境变量。通过日尺度的水分调节和季节尺度的资源配置，揭示了georgei var. Smithii冷杉对高山环境的适应策略，为完善青藏高原碳汇模型和评价生态屏障功能提供了重要的科学依据
{"title":"Dynamic characteristics of radial growth in Abies georgei var. Smithii in cold regions based on dendrometer monitoring","authors":"Yuqi Jia , Yihua Ren , Guofu Song , Guohong Li","doi":"10.1016/j.dendro.2025.126460","DOIUrl":"10.1016/j.dendro.2025.126460","url":null,"abstract":"<div><div>This study examined the seasonal and diurnal dynamics and the radial growth’s environmental response mechanisms of <em>Abies georgei</em> var. <em>Smithii</em> on the Sygera Mountain, southeastern Xizang. Continuous dendrometer monitoring (November 2023–November 2024) and concurrent meteorological data from automated weather stations were analyzed using the zero-growth method to quantify stem radial variation. Key findings include:(1) Diurnal radial variations during the growing season displayed a circadian rhythm characterized by daytime contraction and nocturnal expansion.(2) Seasonal growth dynamics comprised of four phases: dormant period (November–February), initiation period (March–April), rapid growth period (May–August), and decline period (September–October). Annual cumulative growth attained 8–12 mm, with peak rates (0.035 mm/d) observed in June.(3) At diurnal scales, soil temperature and moisture content showed dominant positive correlations with radial growth during the early growing season, while vapor pressure deficit (VPD) became the primary moisture stress factor during rapid growth, exhibiting significant positive correlations with radial expansion. Seasonal-scale growth exhibited greater sensitivity to temperature fluctuations than to other environmental variables. This work reveals the adaptive strategy of <em>Abies georgei</em> var. <em>Smithii</em> to alpine environments through daily-scale water regulation and seasonal-scale resource allocation, providing essential scientific evidence for refining carbon sink models and evaluating ecological barrier functions on the Qinghai-Xizang Plateau</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"95 ","pages":"Article 126460"},"PeriodicalIF":2.3,"publicationDate":"2025-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694261","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}
Pub Date : 2025-12-01DOI: 10.1016/j.dendro.2025.126445
Qin Huang , Guanjie Wang , Kun Shi , Bing Zhao , Zhenjiang Li , Xin Huang , Ting Wang , Ximei Li
Global change has increased the intensity, duration and frequency of drought events, which cause forest dieback and alter forest ecosystem function. Over the past several decades, afforestation efforts have significantly increased globally to compensate for the deficiencies of natural forest. It is critical to understand the sensitivity and resilience to extreme drought in planted and natural forests, which may provide valuable information for forest ecosystem management in sight of climate change. Chinese pine (Pinus tabulaeformis) is a widely planted tree species in northern China, strategies of its marginal forests to drought stress are important to explore their responses to past drought events and evaluate their potential to withstand future droughts. In this study, dendrochronological methods and structural equation modeling (SEM) were employed to analyze the differences in the driving mechanisms of drought resistance and recovery between the planted and the natural P. tabulaeformis forests in the warm temperate-subtropical climate transition zone of China. The results indicated the following: (1) Both the planted forest and the natural forest of P. tabuliformis exhibited low resistance (RT) but high recovery (RC), while the planted forest showed lower RT and higher RC compared to the natural forest; (2) Palmer Drought Severity Index (PDSI) was the dominant climatic factor, exerting similar positive effects on RT of the two forests but with contrasting effects on RC (significantly positive in planted forest yet negative in the natural forest); (3) Biotic factors, specifically the tree growth of the two preceding years (PreTRW) and tree age (AGE), also played critical roles by negatively influencing RT and RC in both forest types. (4) Compared to the natural forest, the higher drought risk in the planted forest was mainly attributed to its homogeneous age and similar individual structural characteristics (such as DBH and tree height), which underscored their greater vulnerability and limited their resistance under drought stress. These findings indicate that biotic and abiotic factors co-regulate the drought resilience of the planted and the natural P. tabulaeformis forests. This research provides useful references for afforestation planning and the preservation of natural forests under future climate change.
{"title":"Pinus tabulaeformis plantations have higher drought recovery than its natural forests in the warm temperate-subtropical climate transition zone","authors":"Qin Huang , Guanjie Wang , Kun Shi , Bing Zhao , Zhenjiang Li , Xin Huang , Ting Wang , Ximei Li","doi":"10.1016/j.dendro.2025.126445","DOIUrl":"10.1016/j.dendro.2025.126445","url":null,"abstract":"<div><div>Global change has increased the intensity, duration and frequency of drought events, which cause forest dieback and alter forest ecosystem function. Over the past several decades, afforestation efforts have significantly increased globally to compensate for the deficiencies of natural forest. It is critical to understand the sensitivity and resilience to extreme drought in planted and natural forests, which may provide valuable information for forest ecosystem management in sight of climate change. Chinese pine (<em>Pinus tabulaeformis</em>) is a widely planted tree species in northern China, strategies of its marginal forests to drought stress are important to explore their responses to past drought events and evaluate their potential to withstand future droughts. In this study, dendrochronological methods and structural equation modeling (SEM) were employed to analyze the differences in the driving mechanisms of drought resistance and recovery between the planted and the natural <em>P. tabulaeformis</em> forests in the warm temperate-subtropical climate transition zone of China. The results indicated the following: (1) Both the planted forest and the natural forest of <em>P. tabuliformis</em> exhibited low resistance (RT) but high recovery (RC), while the planted forest showed lower RT and higher RC compared to the natural forest; (2) Palmer Drought Severity Index (PDSI) was the dominant climatic factor, exerting similar positive effects on RT of the two forests but with contrasting effects on RC (significantly positive in planted forest yet negative in the natural forest); (3) Biotic factors, specifically the tree growth of the two preceding years (PreTRW) and tree age (AGE), also played critical roles by negatively influencing RT and RC in both forest types. (4) Compared to the natural forest, the higher drought risk in the planted forest was mainly attributed to its homogeneous age and similar individual structural characteristics (such as DBH and tree height), which underscored their greater vulnerability and limited their resistance under drought stress. These findings indicate that biotic and abiotic factors co-regulate the drought resilience of the planted and the natural <em>P. tabulaeformis</em> forests. This research provides useful references for afforestation planning and the preservation of natural forests under future climate change.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"94 ","pages":"Article 126445"},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145617732","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}
Pub Date : 2025-12-01DOI: 10.1016/j.dendro.2025.126447
Jesper Björklund
{"title":"Special issue on blue intensity: Methods and applications","authors":"Jesper Björklund","doi":"10.1016/j.dendro.2025.126447","DOIUrl":"10.1016/j.dendro.2025.126447","url":null,"abstract":"","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"94 ","pages":"Article 126447"},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145684121","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}
Pub Date : 2025-12-01DOI: 10.1016/j.dendro.2025.126403
Ireneusz Malik , Michael Maerker , Małgorzata Wistuba , Elżbieta Gorczyca , Patrizio Torrese , Manuel La Licata , Yang Yu , Beata Woskowicz-Ślęzak , Anna Bieniasz
{"title":"Corrigendum to “Tree rings indicate hazards related to a waterside landslide in the Northern Apennines, Italy–A preliminary step towards forecasting landslides and related tsunami” [Dendrochronologia 92 (2025) 126379]","authors":"Ireneusz Malik , Michael Maerker , Małgorzata Wistuba , Elżbieta Gorczyca , Patrizio Torrese , Manuel La Licata , Yang Yu , Beata Woskowicz-Ślęzak , Anna Bieniasz","doi":"10.1016/j.dendro.2025.126403","DOIUrl":"10.1016/j.dendro.2025.126403","url":null,"abstract":"","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"94 ","pages":"Article 126403"},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145684119","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}
Pub Date : 2025-11-28DOI: 10.1016/j.dendro.2025.126455
Hanxue Liang , Jinji Li , Yimin Ren , Le Wang , Zhitao Wu
The response of treeline trees to climate warming is highly complex. Although numerous studies have examined this issue worldwide, comprehensive coverage of all global treelines remains impossible, and the roles of temperature and precipitation exhibit pronounced spatiotemporal variability. To address these gaps, we collected tree-ring samples from two Picea species at treeline sites in the Helan Mountains (western China) and Luya Mountain (central China) along the same latitude, and conducted dendroclimatic analyses. Correlation analyses revealed that in the Helan region, growing-season temperatures had a significant negative influence on tree growth before 1998, after which precipitation became the dominant positive driver. SPEI-based analyses showed significant positive correlations between ring width and multi-month SPEI from June to August, indicating that tree growth at the Helan treeline was moisture-limited. In contrast, tree growth at the Luya site was consistently and positively correlated with May temperature, with no significant relationship to precipitation. Analyses using SPEI further demonstrated that moisture is not a limiting factor for tree growth at the Luya treeline. Our findings suggest that macroclimate is likely governing how treeline trees respond to climate variability. Under continued warming, arid regions may experience growth decline due to intensified drought stress, whereas humid regions are likely to benefit from rising temperatures. These results contribute to the global dataset on treeline responses to climate change and provide clear evidence for the relative roles of temperature and moisture in governing treeline dynamics.
{"title":"Macroclimate determines whether tree growth at alpine treelines is primarily limited by temperature or precipitation in northern China","authors":"Hanxue Liang , Jinji Li , Yimin Ren , Le Wang , Zhitao Wu","doi":"10.1016/j.dendro.2025.126455","DOIUrl":"10.1016/j.dendro.2025.126455","url":null,"abstract":"<div><div>The response of treeline trees to climate warming is highly complex. Although numerous studies have examined this issue worldwide, comprehensive coverage of all global treelines remains impossible, and the roles of temperature and precipitation exhibit pronounced spatiotemporal variability. To address these gaps, we collected tree-ring samples from two <em>Picea</em> species at treeline sites in the Helan Mountains (western China) and Luya Mountain (central China) along the same latitude, and conducted dendroclimatic analyses. Correlation analyses revealed that in the Helan region, growing-season temperatures had a significant negative influence on tree growth before 1998, after which precipitation became the dominant positive driver. SPEI-based analyses showed significant positive correlations between ring width and multi-month SPEI from June to August, indicating that tree growth at the Helan treeline was moisture-limited. In contrast, tree growth at the Luya site was consistently and positively correlated with May temperature, with no significant relationship to precipitation. Analyses using SPEI further demonstrated that moisture is not a limiting factor for tree growth at the Luya treeline. Our findings suggest that macroclimate is likely governing how treeline trees respond to climate variability. Under continued warming, arid regions may experience growth decline due to intensified drought stress, whereas humid regions are likely to benefit from rising temperatures. These results contribute to the global dataset on treeline responses to climate change and provide clear evidence for the relative roles of temperature and moisture in governing treeline dynamics.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"95 ","pages":"Article 126455"},"PeriodicalIF":2.3,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145625341","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}
In dendrochronology, missing tree rings are commonly regarded as indicators of suppressed tree growth, reflecting inhibited cambial activity; however, the connection between missing tree rings and climatic factors still lacks thorough investigation. This study focuses on Larix sibirica growing in the Altai Mountains, where the overall missing tree ring rates (MRRs) were calculated for three sampling plots as follows: BLS (1.20 %), KLS (1.41 %), and TZB (0.60 %). Years with significantly missing tree rings (p < 0.01) coincide with documented drought events, occurring in 1965, 1973, 1983, 1984, 1999, and 2009, with 2009 showing the highest proportion of missing tree rings, reaching up to 24.94 %. The results suggest that drought stress is the primary limiting factor for radial growth of trees in the region. Additionally, correlation analysis showed that both tree growth and the self-calibrating Palmer Drought Severity Index (sc-PDSI) presented an extremely significant positive correlation. In the five statistically analyzed significant missing tree ring events, the resistance of trees is consistently less than 1 (or negative), with Larix sibirica showing sensitivity and low resistance to drought events. Assessment of tree growth status indicates that consecutive drought events decrease ecological stability, leading to suppressed growth and decline in trees.
{"title":"Drought-driven tree growth limitations and missing rings in the Altai Mountains, China","authors":"Kailong Guo , Tongwen Zhang , Shulong Yu , Kexiang Liu , Dong Guo","doi":"10.1016/j.dendro.2025.126446","DOIUrl":"10.1016/j.dendro.2025.126446","url":null,"abstract":"<div><div>In dendrochronology, missing tree rings are commonly regarded as indicators of suppressed tree growth, reflecting inhibited cambial activity; however, the connection between missing tree rings and climatic factors still lacks thorough investigation. This study focuses on <em>Larix sibirica</em> growing in the Altai Mountains, where the overall missing tree ring rates (MRRs) were calculated for three sampling plots as follows: BLS (1.20 %), KLS (1.41 %), and TZB (0.60 %). Years with significantly missing tree rings (<em>p</em> < 0.01) coincide with documented drought events, occurring in 1965, 1973, 1983, 1984, 1999, and 2009, with 2009 showing the highest proportion of missing tree rings, reaching up to 24.94 %. The results suggest that drought stress is the primary limiting factor for radial growth of trees in the region. Additionally, correlation analysis showed that both tree growth and the self-calibrating Palmer Drought Severity Index (sc-PDSI) presented an extremely significant positive correlation. In the five statistically analyzed significant missing tree ring events, the resistance of trees is consistently less than 1 (or negative), with <em>Larix sibirica</em> showing sensitivity and low resistance to drought events. Assessment of tree growth status indicates that consecutive drought events decrease ecological stability, leading to suppressed growth and decline in trees.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"94 ","pages":"Article 126446"},"PeriodicalIF":2.3,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145571338","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}
Pub Date : 2025-11-11DOI: 10.1016/j.dendro.2025.126444
Omar Hernández-Vargas , Miguel Olvera-Vargas , Blanca Lorena Figueroa-Rangel , Ulises Rodríguez-Robles , Carlos Palomera-García , Ramón Cuevas-Guzmán
Dendrochemical research has evolved alongside advancements in analytical techniques like ICP-MS and X-ray fluorescence spectroscopy, enabling high-resolution data collection on trace elements in tree rings. This interdisciplinary field integrates dendrochronology, environmental chemistry, and ecotoxicology, offering valuable insights into historical climate conditions, environmental contamination, and forest health. Key bibliometric analyses reveal that terms like "dendrochemistry" and "trace elements" are central to this research, with applications ranging from environmental monitoring to climate reconstructions. Research clusters indicate strong collaboration networks in North America and Europe, while Latin American countries like Brazil, Chile, and Argentina are forming regional clusters, reflecting a growing research presence. Dendrochemical studies primarily contribute to environmental sciences (35.4 %), to agricultural and biological sciences (22.1 %), and to earth sciences (14.8 %), highlighting their versatility in addressing environmental, ecological, and geoclimatic challenges. Advanced techniques like Itrax multiscanner and ICP-MS have become essential tools, enabling detailed analysis of tree-ring chemistry and improving our understanding of ecosystem dynamics. This systematic review demonstrates the critical role of dendrochemistry in advancing scientific knowledge and emphasizes the need for continued innovation and global collaboration to tackle complex environmental and climatic issues.
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