Dendrochronologia最新文献

{"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":"2025-08-01","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":"Tree growth responses to summer temperature on the Korean Peninsula detected by tree-ring blue intensity","authors":"Min-Seok Kim ,&nbsp;Mauricio Fuentes ,&nbsp;Hans W. Linderholm ,&nbsp;Frida Lidman ,&nbsp;Youngdae Koh ,&nbsp;Chanhyuk Choi ,&nbsp;Jee-Hoon Jeong","doi":"10.1016/j.dendro.2025.126345","DOIUrl":"10.1016/j.dendro.2025.126345","url":null,"abstract":"<div><div>Tree-ring blue intensity (BI), a relatively new proxy using the amount of blue light reflected from tree-ring cores, has garnered considerable attention in dendroclimatology due to its effectiveness in capturing climate signals. While the application of BI in climate reconstructions is spreading across the world, it has not yet been fully explored in East Asia. In this pilot study, tree-ring width (TRW) and BI (earlywood BI, maximum latewood BI, and delta BI) chronologies were developed from Korean pine (<em>Pinus koraiensis</em> Siebold &amp; Zucc.) on Mt. Seorak in the Korean Peninsula. While the BI chronologies developed in this study exhibited relatively weak series intercorrelations, they nonetheless captured significant and consistent summer temperature signals, demonstrating their dendroclimatological potential. In particular, the delta BI (DBI) chronology was well correlated with summer (July to August) mean temperature at both local and regional scales. In contrast to the TRW chronology, which failed to capture a consistent climate-related signal, the DBI chronology consistently retained the tree growth response to summer temperature variability from the early 20th century to the present. Further large-scale correlation analysis demonstrated that the DBI chronology can be used in the historical reconstruction of the circumglobal teleconnection pattern and the subtropical jet stream. These findings show that the application of the BI methodology can significantly enhance the ability of tree-ring data to capture climate signals that are not apparent in TRW in subtropical East Asia.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126345"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912080","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":"Factors affecting dating quality of scarred Picea abies roots: Implications for dendrogeomorphic reconstructions","authors":"Radek Tichavský","doi":"10.1016/j.dendro.2025.126348","DOIUrl":"10.1016/j.dendro.2025.126348","url":null,"abstract":"<div><div>Exposed and scarred tree roots are valuable environmental archives of geomorphic activity, often used in dendrogeomorphic reconstructions of gully and sheet erosion, debris flood activity, or landslide development. However, their reliability for dating is generally lower compared to tree-ring records in stems. This study aims to evaluate growth anomalies, particularly wedging and missing rings, in Norway spruce roots (<em>Picea abies</em> (L.) Karst.) affected by hydrogeomorphic activity. The objective was to determine whether specific root parameters, such as age, size, shape, or external disturbances, influence the abundance of wedging and potentially missing rings, thereby compromising dating quality. Two datasets of root cross-sections were analysed: (a) 53 cross-sections from eleven roots for multiscale dendrochronological cross-dating and analysis of missing and wedging rings, and (b) 276 cross-sections from 276 individual trees to examine the relationships between wedging ring frequency and root parameters. The results indicate that an increased abundance of wedging and missing rings is mainly associated with decreased annual root area increments and multiple scarring, and is less certainly detectable from increased irregularity in root shape changing from circular to elliptical. Additional analyses also revealed a significantly higher frequency of wedging rings before the first scarring compared to ring sequences after the first scar. To avoid dating errors caused by growth anomalies, future sampling strategies should prioritize thicker roots, which are more likely to have greater root area increments, over smaller roots with a higher probability of extremely narrow rings. Regardless of root age, size, or shape, cutting multiple cross-sections from single roots is strongly recommended to minimize the risk of missing rings.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126348"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947443","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":"2025-08-01","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":"Climate sensitivity of Quercus macranthera Fisch. & C. A. Mey. at the high-elevation forest edge of the Alborz Mountains, N Iran","authors":"Halime Moradi,&nbsp;Niels Schwab,&nbsp;Udo Schickhoff","doi":"10.1016/j.dendro.2025.126358","DOIUrl":"10.1016/j.dendro.2025.126358","url":null,"abstract":"<div><div>Alpine treelines mark the upper limits of tree growth in mountain ecosystems, with heat deficiency being the globally common abiotic driver. Controlled by low temperatures, tree growth at treelines will be responsive to above-average climate warming in the world’s high mountains. Trees at the high-elevation forest edge of the Alborz Mountains in northern Iran have rarely been used so far to study growth-climate relationships. While growth responses to climate change have been studied for several species in this region, the effects of climatic factors on <em>Quercus macranthera</em> Fisch. &amp; C. A. Mey., particularly at the current upper tree limit, remain underexplored. This study investigates the dendroclimatology of <em>Quercus macranthera</em>, the dominant species at the high-elevation forest edge in the Alborz Mountains. We developed tree ring width (TRW) chronologies spanning over 400 years from three sites to investigate long-term relationships between tree growth and climate. The chronologies showed significant correlations with temperature and precipitation patterns. Radial growth was positively influenced by winter and spring temperatures and growing season precipitation. Drought stress, particularly in late summer and autumn, emerged as a key growth limiting factor. These results suggest that <em>Quercus macranthera</em> is sensitive to climate variability, with local factors such as topography and moisture availability modifying the sensitivity. This study highlights the potential impacts of climate change on high-elevation forests and sheds light on how <em>Quercus macranthera</em> may respond to future climate change.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126358"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147411","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":"Monsoon climatic signal is stronger in wood anatomical traits than in ring widths of Fokienia hodginsii in central Vietnam","authors":"Silvia Passardi ,&nbsp;Paolo Cherubini ,&nbsp;Brendan M. Buckley ,&nbsp;Nam Le Cahn ,&nbsp;Holger Gärtner","doi":"10.1016/j.dendro.2025.126381","DOIUrl":"10.1016/j.dendro.2025.126381","url":null,"abstract":"<div><div>Dendrochronological studies conducted in tropical regions in recent decades revealed that some species exhibit annual rings. In Southeast Asia, several ring-width chronologies of <em>Fokienia hodginsii</em> (Dunn) A. Henry &amp; H H.Thomas were established to reconstruct past climatic conditions.</div><div>Nevertheless, despite the strong correlations with meteorological data, the climate signal in the ring-width chronologies is robust for the shoulder season of the monsoon. For those interested in intra-annual climate signals, other parameters might prove useful. Information on intra-annual variability is crucial for understanding tree growth processes and climate dynamics in tropical regions. In this study, we explore the potential of wood anatomical parameters for climate reconstruction and for gaining a better understanding of the current climate of Southeast Asia. Microslides from cores of <em>F. hodginsii</em> in central Vietnam were analyzed. Notably, average lumen perimeter and lumen length demonstrated the most robust climate signals. They exhibit stronger correlations than ring width with maximum temperature, precipitation, and the Standardized Precipitation Evapotranspiration Index. The highest correlation (r = 0.5) was observed between lumen area and October-November-December precipitation. Furthermore, earlywood parameters show higher correlations with precipitation than whole ring parameters. The growth of earlywood in <em>F. hodginsii</em> appears to be influenced by climatic conditions during September-October-November of the previous year and April of the current year. Thus, earlywood is generally produced around April, whereas latewood grows during or after April-May-June. This study is the first attempt to use anatomical parameters to reconstruct climate in Southeast Asia and provides valuable insights into the intra-annual growth dynamics of tropical tree rings.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126381"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518541","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":"Notes on the Larix/Picea wood identification problem: Dendrochronological and wood anatomical insights from a subfossil stem disk","authors":"Alan Crivellaro ,&nbsp;Flavio Ruffinatto ,&nbsp;Paola Nola ,&nbsp;Renzo Motta ,&nbsp;Michele Freppaz ,&nbsp;Marta Monterin ,&nbsp;Alma Piermattei","doi":"10.1016/j.dendro.2025.126342","DOIUrl":"10.1016/j.dendro.2025.126342","url":null,"abstract":"<div><div>The decades-old problem of distinguishing spruce (<em>Picea</em> sp.) from larch (<em>Larix</em> sp.) wood is still debated in wood identification. Although species-specific anatomical traits have been proposed to address this issue, their variable appearance and limited diagnostic power hinder reliable differentiation, particularly for archaeological wood samples. Finding a stem disk collected over a century ago from a glacial moraine deposit brought us to face the <em>Larix</em>/<em>Picea</em> identification problem again. Here, we skimmed the literature for wood anatomical features typical for each species and examined these traits in the subfossil wood disk. Key features assessed included heartwood and sapwood colour differences, earlywood-to-latewood transitions, tracheid pitting in radial walls, ray tracheid pit borders, the number of epithelial cells per resin canal, and the position of resin canals in rays. Additionally, we measured tree-ring widths to attempt dendrochronological dating of the disk. Tree-ring measurements enabled precise dating and revealed a quasi-decadal occurrence of narrow and light rings, indicative of cyclical larch budmoth (<em>Zeiraphera diniana</em> Gn.) infestations. Based on the presence of these characteristic budmoth rings and successful crossdating with 31 published and unpublished larch chronologies, compared to poor correlation with spruce chronologies, we conclusively identified the disk as <em>Larix decidua</em> Mill. However, our wood anatomical observations did not distinguish between spruce and larch reliably, suggesting that some features may vary with tree age and stem position. This highlights the need for further investigation with targeted sampling of living trees to validate the diagnostic utility of certain anatomical features.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126342"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898976","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":"2025-08-01","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":"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":"2025-08-01","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":"The first temperature reconstruction based on tree-ring blue intensity in the Qinling Mountains","authors":"Mei Xie ,&nbsp;Qiufang Cai ,&nbsp;Yu Liu ,&nbsp;Keyan Fang ,&nbsp;Qiuyue Zhou ,&nbsp;Meng Ren ,&nbsp;Kebayier Meng ,&nbsp;Qiang Li ,&nbsp;Changfeng Sun ,&nbsp;Huiming Song ,&nbsp;Dan Chen ,&nbsp;Yufei Chen","doi":"10.1016/j.dendro.2025.126359","DOIUrl":"10.1016/j.dendro.2025.126359","url":null,"abstract":"<div><div>Reconstructing historical temperatures is crucial for understanding climate history and predicting future changes. While traditional proxies such as tree-ring width, stable isotopes, and X-ray density, may be limited by poor temperature signal capture or high costs, the emerging blue intensity (BI) in tree rings provides an effective alternative for low-latitude temperature reconstruction. Here for the first time, we introduce BI to examine the climatic signals in <em>Pinus tabulaeformis</em> Carr. from the Qinling Mountains (QLM). We develop chronologies for tree-ring width (TRW), earlywood BI (EWBI), latewood BI (LWBI), and Delta BI (DeltaBI) based on <em>P. tabulaeformis</em> samples, and then successfully reconstruct the mean February–June maximum temperature (Tmax_2–6) anomalies over the past 174 years using the EWBI chronology, with an explained variance of 43.56 % for the observed data. Our key findings include: 1) Tree-ring BI data in the QLM retains stronger climatic information than the TRW data. 2) Our reconstruction reveals that QLM experienced three significant warm periods (1871–1892, 1898–1931, and 2012–2020) and three cold periods (1856–1864, 1939–1965, and 1976–1996). The new reconstruction aligns with nearby temperature reconstructions and climate grid data, documenting similar temperature fluctuations in the western Loess Plateau and the QLM. 3) It suggests a significant link between Tmax_2–6 variations in the QLM and large-scale climate oscillations, specifically the Pacific Decadal Oscillation (PDO) and the Atlantic Multidecadal Oscillation (AMO). This study affirms the utility of tree-ring BI for climate research in the QLM, offering insights that benefit similar low-latitude areas.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126359"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071232","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}