Dendrochronologia最新文献_第2页

Warming drives non-stationary climate-growth relationships and differential drought sensitivity in Mediterranean pines 变暖驱动了地中海松树的非平稳气候-生长关系和不同的干旱敏感性

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2026-01-05 DOI: 10.1016/j.dendro.2026.126469

João Campôa , Teresa Calvão , Joshua J. Puhlick , Carla S. Pimentel

In Mediterranean forests, increasing tree susceptibility to drought has often been attributed to local site conditions and species-specific adaptations to water scarcity. Climate-growth relationship has been assumed to be stationary; however, warming can induce non-stationary relationships. This study aimed to evaluate whether recent warming has induced non-stationary growth responses in Mediterranean forests. For these two Mediterranean pine species with different life-history traits (Pinus pinea and Pinus pinaster), were studied using dendrochronological data, in two areas of Portugal with distinct Mediterranean Type climate (Csb - warm-summer Mediterranean, and Csa - hot-summer Mediterranean). We evaluated average tree ring indices for two periods, before and after the 1970s onset of the warming trend, to determine potential changes in growth sensitivity to moisture availability. Our results reveal that increased warming after the 1970s induced contrasting species-specific responses. Fast growing P. pinaster had enhanced growth during favorable conditions at mesic sites. In contrast, the more xeric P. pinea reduced growth under warming, indicating a change in consideration of these two species capacities to cope with future climatic conditions. We have not found an increase in sensitivity to water availability during warming, therefore, future drought recovery for both species will largely depend on local declines in water availability. These findings highlight the importance of accounting for non-stationary climate–growth relationships when predicting species responses to climate change. Understanding the mechanisms driving tree resilience is critical for developing more accurate and effective forest management strategies under future scenarios of warming and more frequent and severe droughts.

在地中海森林中，树木对干旱的易感性增加通常归因于当地的场地条件和物种对缺水的特定适应。气候增长关系一直被认为是平稳的；然而，气候变暖可能导致非平稳关系。这项研究旨在评估最近的变暖是否引起了地中海森林的非平稳生长反应。采用树木年代学方法，对两种具有不同生活史特征的地中海松树（Pinus pinea和Pinus pinaster）进行了研究，选取了葡萄牙两个地中海型气候（Csb -地中海暖夏气候和Csa -地中海热夏气候）。我们评估了20世纪70年代变暖趋势开始前后两个时期的平均树木年轮指数，以确定生长对水分有效性敏感性的潜在变化。我们的研究结果表明，在20世纪70年代之后，变暖的加剧引起了不同物种的特异性反应。在有利的环境条件下，快速生长的紫菀生长速度加快。相比之下，更干燥的松果松在变暖下生长减少，表明考虑到这两个物种应对未来气候条件的能力发生了变化。我们还没有发现在变暖期间对水供应的敏感性增加，因此，这两个物种未来的干旱恢复将在很大程度上取决于当地水供应的下降。这些发现强调了在预测物种对气候变化的反应时考虑非平稳气候增长关系的重要性。了解驱动树木恢复力的机制对于在未来变暖和更频繁和严重干旱的情况下制定更准确和有效的森林管理战略至关重要。

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引用次数: 0

Refined minimum ages for hollow yew-trees based on dendrochronological analysis 基于树木年代学分析的空心紫杉的精细化最小树龄

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2026-01-02 DOI: 10.1016/j.dendro.2025.126465

Toby R. Hindson , Andy K. Moir

For the first time using decayed wood, long precisely dated yew tree chronologies have been established for three southern woodland sites and four individual churchyard trees in England. The earliest annual rings of the decayed wood identifies the minimum ages for a total of 33 cross-matching yew-trees. These sequences have been combined to produce a 470 year-long yew wood chronology, dated to span 1492AD-1961AD, currently the longest modern yew chronology in the world. Nine yew trees yielded annual rings dated over 400 years old. Due to the trees’ hollow nature the central pith could still not be identified in any sampled yews, and so minimum ages are produced, although some tree ages were further refined with ring-counted wood. Despite its small girth, the oldest dated sequence from a yew in Ropley Churchyard in Hampshire extends to 1492AD, with additional ring-counts of central wood from this tree refining the minimum age back to the year 1398AD. This research highlights the use of redundant decayed yew wood to produce longer chronologies than is possible from cores or lateral sections of sound-wood.

这是第一次使用腐烂的木材，为英国南部的三个林地和四个单独的教堂墓地树木建立了长期精确的紫杉树年表。腐烂木材的最早年轮确定了总共33棵交叉匹配的紫杉树的最小年龄。这些序列结合在一起，产生了470年的红豆杉年表，时间跨度为1492年至1961年，是目前世界上最长的现代红豆杉年表。九棵紫杉树的年轮可以追溯到400多年前。由于树木的中空性质，在任何取样的红豆杉中仍然无法识别中央髓，因此产生了最小年龄，尽管一些树木的年龄进一步细化了年轮计数的木材。尽管它的周长很小，但汉普郡罗普利教堂墓地的一棵紫杉的最古老的年代序列可以追溯到公元1492年，加上这棵树的中心木材的额外年轮数，将最低年龄追溯到公元1398年。这项研究强调了使用多余的腐烂红豆杉来制作比从核心或木材的横向部分可能更长的年表。

引用次数: 0

Radial growth resilience of temperate deciduous oaks to drought events across aridity gradients in the southern Loess Plateau, China 黄土高原南部温带落叶栎树径向生长对干旱事件的恢复力

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-12-31 DOI: 10.1016/j.dendro.2025.126468

Xiaoqi Chen , Xiaomin Zeng , Xiaohong Liu , Huiyue Yan , Quanxi Li , Mao Wei

Understanding how tree growth resilience responds to drought along aridity gradients is critical for conserving temperate forests in semi-arid regions under ongoing climate change, yet such assessments remain limited in northern China. Here, we investigated growth–climate relationships and drought resilience of two dominant oak species (Quercus liaotungensis and Quercus variabilis) across an aridity gradient in the southern Loess Plateau using tree-ring chronologies. Oak radial growth became progressively more dependent on water availability with increasing aridity, whereas temperature sensitivity remained consistently weak across sites, indicating a dominant control of moisture on growth. Along this gradient, oaks at drier sites exhibited lower resistance during drought but higher post-drought recovery, while trees at more humid sites showed the opposite pattern, revealing a clear resistance–recovery trade-off. Notably, compensatory growth following drought was observed at all sites, suggesting a common but context-dependent adaptive response to water stress. At relatively arid sites, the resistance–recovery relationship approached the theoretical “line of full resilience,” indicating a greater capacity to offset drought-induced growth losses through recovery-oriented strategies. Further analyses revealed that drought resilience was jointly regulated by baseline growth conditions, drought severity, and site-specific climatic sensitivity. Higher pre-drought growth potential constrained short-term recovery but enhanced long-term resilience, highlighting the dual role of baseline growth in shaping drought responses. Together, these findings demonstrate that oak populations in the southern Loess Plateau adopt distinct yet complementary resilience strategies along aridity gradients, shifting from resistance-dominated growth in humid environments to recovery and compensation-oriented strategies under increasing water limitation. This strategy differentiation provides new mechanistic insights into how oak forests persist under recurrent drought and offers a scientific basis for developing site-specific management strategies in the region.

了解树木生长弹性如何沿着干旱梯度对干旱的响应对于保护气候变化持续的半干旱地区的温带森林至关重要，但此类评估在中国北方仍然有限。本文利用树木年轮年代学研究了黄土高原南部干旱梯度下两种优势栎种（辽东栎和变栎）的生长-气候关系和抗旱能力。随着干旱程度的增加，橡树的径向生长越来越依赖于水分的有效性，而温度敏感性在不同地点一直很弱，表明水分对生长的主要控制。沿着这一梯度，干旱地区的栎树在干旱期间表现出较低的抗性，但干旱后恢复较高，而湿润地区的栎树则表现出相反的模式，揭示了明显的抗性-恢复权衡。值得注意的是，在所有地点都观察到干旱后的补偿性生长，这表明对水分胁迫有一种共同但依赖于环境的适应性反应。在相对干旱的地区，抗性-恢复关系接近理论的“完全恢复力线”，表明通过以恢复为导向的战略抵消干旱引起的生长损失的能力更大。进一步的分析表明，干旱恢复力受基线生长条件、干旱严重程度和特定地点气候敏感性的共同调节。干旱前较高的增长潜力限制了短期恢复，但增强了长期抵御能力，突出了基线增长在形成干旱响应方面的双重作用。总之，这些发现表明，黄土高原南部地区的栎树种群在干旱梯度上采取了不同但互补的恢复策略，从湿润环境下以抗性为主的生长向水分限制增加下以恢复和补偿为主的生长转变。这种策略差异为了解橡树林在周期性干旱下如何持续提供了新的机制见解，并为制定该地区特定地点的管理策略提供了科学依据。

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引用次数: 0

Changing stand densities influence xylem and phloem formation in Norway spruce plantations 林分密度变化对挪威云杉人工林木质部和韧皮部形成的影响

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-12-26 DOI: 10.1016/j.dendro.2025.126467

Kyriaki Giagli , Hanuš Vavrčík , Dimitrios Tsalagkas , Jan Leugner , Jana Hacurová , Vladimír Gryc , Jakub Černý

An investigation over three years (2021–2023) at the Křivina site in the Czech Republic studied how pre-commercial thinning (PCT) affects Norway spruce growth, focusing on xylogenesis and phloemogenesis in the stem across three research plots. In February 2020, PCT reduced stand density to 2062 trees per hectare (KRst; mild thinning), in line with Norway spruce standard practices in the country and to 1365 trees per hectare (KRex; heavy thinning) as an experimental approach to heavy PCT. KRco, which underwent no silvicultural intervention, served as the control with a density of 3519 trees per hectare. The number of cells and the maximum weekly growth rate indicated a pronounced growth trend following the heavy thinning in the KRex, which was significantly different from the untreated KRco, particularly in 2021. The heavily thinned plot, KRex, demonstrated the highest production of sieve cells across all the studied years, predominantly affecting the late phloem. In contrast, the early phloem and axial parenchyma cells consistently showed a trend across all plots and years. Throughout all treatment regimes, the three plots consistently demonstrated a declining trend in tracheid production over the three analysed years. No influence of the PCT on the morphology of tracheids was observed.

在捷克共和国Křivina站点进行了为期三年（2021-2023）的调查，研究了商业前间伐（PCT）如何影响挪威云杉的生长，重点研究了三个研究地块的茎部木质发生和韧皮形成。2020年2月，PCT将林分密度降至每公顷2062棵（KRst，轻度间伐），符合挪威云杉的标准做法；作为重度PCT的实验方法，PCT将林分密度降至每公顷1365棵（KRex，重度间伐）。KRco不进行造林干预，作为对照，密度为每公顷3519棵。KRex细胞数量和最大周生长速率在重度变薄后呈现明显的增长趋势，与未处理的KRco明显不同，特别是在2021年。在所有研究年份中，重度稀疏的KRex小区筛细胞产量最高，主要影响后期韧皮部。早期韧皮部和轴向薄壁细胞在不同的样地和年份表现出一致的变化趋势。在所有的处理方案中，三个样地的管胞产量在三个分析年份中一致呈现下降趋势。未观察到PCT对气管形态的影响。

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引用次数: 0

Refining history of the earliest documented Quercus robur L. plantation in the Ukrainian steppe 乌克兰大草原最早记录的栎树种植园的精炼历史

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-12-25 DOI: 10.1016/j.dendro.2025.126466

Yulia Prokopuk , Maksym Netsvetov , Oleksandr Sylenko , Oleg Skrynyk , Oleksandr Khodosovtsev

Steppe landscapes, though open, host trees and small forest patches along river corridors and ravines, and people have long established orchards, shelterbelts, and woods. Dating the earliest documented plantations helps conserve historic groves and build dendroarchaeological baseline at the dry forest-steppe margin. We date the Quercus robur ‘Labyrinth’ plantation at Trykraty (southern Ukraine), often cited as the oldest surviving steppe plantation, and compare its growth-climatic sensitivity with two published steppe Q. robur chronologies. From 12 old trees we developed earlywood, latewood, and total ring-width chronologies. Crossdating places the oldest trees at ≤ 1820, likely during a landowner Viktor Skarzhynsky’s early trials, with planting continuing through the 19th century. Tree-ring evidence and contemporary sources indicate a sequence of early steppe afforestation initiatives: Trykraty (≤1820) and Mennonite plantings along the Molochna River (from 1811), followed by private experiments and state programmes from eastern Moldova and southwestern Ukraine eastward to the North Caucasus (Russia). Trykraty is slightly more climate-sensitive, positive to dormant-season warmth and April–June precipitation, while an emergent negative winter–spring temperature response is strongest at the easternmost site. These findings (i) verify an early oak plantation date (<1820) for the region, (ii) show that a planted grove expresses strong, coherent climate signals, and (iii) provide a foundation for a southern-steppe master chronology for dendroclimatology and dendroarchaeology.

草原景观虽然是开放的，但沿着河流走廊和沟壑生长着树木和小片森林，人们长期以来建立了果园、防护林和森林。测定最早有记录的种植园的年代有助于保护历史悠久的树林，并在干燥的森林草原边缘建立树木考古基线。我们确定了位于Trykraty（乌克兰南部）的栎树“迷宫”种植园的年代，它通常被认为是现存最古老的草原种植园，并将其生长-气候敏感性与两份已发表的草原栎树年表进行了比较。从12棵老树中，我们开发了早木、晚木和总环宽年表。交叉年代测定表明，最古老的树木生长在≤ 1820年，可能是在土地所有者Viktor Skarzhynsky的早期试验期间，种植一直持续到19世纪。树木年轮证据和当代资料表明了早期草原造林计划的顺序：特Trykraty（≤1820年）和Mennonite沿着Molochna河种植（1811年），随后是私人实验和国家计划，从摩尔多瓦东部和乌克兰西南部向东到北高加索（俄罗斯）。trykrrat对气候的敏感性略高，对冬眠季节的温暖和4 - 6月的降水呈正相关，而最东端的冬春温度响应呈负相关。这些发现(i)验证了该地区早期的橡树种植日期（<1820），（ii）表明种植的树林表达了强烈的、连贯的气候信号，（iii）为南方草原树木气候学和树木考古学的主年代学提供了基础。

{"title":"Refining history of the earliest documented Quercus robur L. plantation in the Ukrainian steppe","authors":"Yulia Prokopuk , Maksym Netsvetov , Oleksandr Sylenko , Oleg Skrynyk , Oleksandr Khodosovtsev","doi":"10.1016/j.dendro.2025.126466","DOIUrl":"10.1016/j.dendro.2025.126466","url":null,"abstract":"<div><div>Steppe landscapes, though open, host trees and small forest patches along river corridors and ravines, and people have long established orchards, shelterbelts, and woods. Dating the earliest documented plantations helps conserve historic groves and build dendroarchaeological baseline at the dry forest-steppe margin. We date the <em>Quercus robur</em> ‘Labyrinth’ plantation at Trykraty (southern Ukraine), often cited as the oldest surviving steppe plantation, and compare its growth-climatic sensitivity with two published steppe <em>Q. robur</em> chronologies. From 12 old trees we developed earlywood, latewood, and total ring-width chronologies. Crossdating places the oldest trees at ≤ 1820, likely during a landowner Viktor Skarzhynsky’s early trials, with planting continuing through the 19th century. Tree-ring evidence and contemporary sources indicate a sequence of early steppe afforestation initiatives: Trykraty (≤1820) and Mennonite plantings along the Molochna River (from 1811), followed by private experiments and state programmes from eastern Moldova and southwestern Ukraine eastward to the North Caucasus (Russia). Trykraty is slightly more climate-sensitive, positive to dormant-season warmth and April–June precipitation, while an emergent negative winter–spring temperature response is strongest at the easternmost site. These findings (i) verify an early oak plantation date (<1820) for the region, (ii) show that a planted grove expresses strong, coherent climate signals, and (iii) provide a foundation for a southern-steppe master chronology for dendroclimatology and dendroarchaeology.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"95 ","pages":"Article 126466"},"PeriodicalIF":2.3,"publicationDate":"2025-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884305","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}

引用次数: 0

A new scratch-based approach to studying the structure of annual growth rings suitable for dendrochronology and dendroclimatology 一种适合年轮年代学和年轮气候学的年轮结构研究新方法

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-12-17 DOI: 10.1016/j.dendro.2025.126464

Alexander A. Samodurov , Alexander I. Tuyrin , Maria A. Yunak , Vyacheslav V. Rodaev , Dmitry Yu. Golovin , Vladimir A. Shamaev , Alexander V. Russu

Research in disciplines such as dendrochronology, dendroclimatology and dendroecology is based on information about the structure of annual growth rings of wood, which is most often obtained by optical methods. However, the optical properties of wood are not directly related to its other properties, such as mechanical ones. At the same time, some methods of studying mechanical properties, such as densitometry, are considered more informative. However, these methods are quite labor-intensive and require expensive equipment. The above suggests the development of a simple, informative and easy-to-use approach to studying the mechanical properties of wood. This paper discusses the scratch test method employing continuous measurement of the micromechanical properties of wood. It is based on the recording and further analysis of the radial profile of the normal force F_n, recorded when scratching the crosscut with a specific probe at a given depth. The method was tested on Scots pine (Pinus sylvestris L.) and Siberian larch (Lárix sibirica) wood. The scratch test allows taking into account the features of the intra-ring structure and obtaining the hardness Hs profile. It has an oscillating character, and the minimums and maximums correspond to the mechanical properties of early and late wood. The obtained hardness profiles correlated highly with the density profiles obtained from the analysis of SEM images of the wood cellular structure. The widths of annual growth rings were determined from the scratch test data; the discrepancy between the values obtained by scratch test and the optical method was < 3 % for pine and < 5 % for larch. The scratch test method has shown high efficiency and is less labor-intensive than other methods of measuring local properties of wood. It has high potential for application in the further development of dendrochronology and other disciplines.

诸如树木年代学、树木气候学和树木生态学等学科的研究是以木材年轮结构的信息为基础的，这些信息通常是通过光学方法获得的。然而，木材的光学性能与其其他性能（如机械性能）没有直接关系。与此同时，一些研究机械性能的方法，如密度测定法，被认为更能提供信息。然而，这些方法是相当劳动密集型的，需要昂贵的设备。以上建议发展一种简单，信息丰富和易于使用的方法来研究木材的机械性能。本文讨论了采用连续测量木材微观力学性能的划痕试验方法。它是基于记录和进一步分析法向力Fn的径向轮廓，当用特定的探针在给定深度刮擦横切时记录。对苏格兰松（Pinus sylvestris L.）和西伯利亚落叶松（Lárix sibirica）木材进行了试验。划痕测试允许考虑到环内结构的特征并获得硬度Hs剖面。它具有振荡特征，最小值和最大值对应于早期和晚期木材的力学性能。通过对木材细胞结构的SEM图像进行分析，得到的硬度曲线与密度曲线高度相关。根据划痕试验数据确定年轮的宽度；通过划痕试验和光学方法得到的数值差异，松木为 3 %，落叶松为 5 %。与其他测量木材局部特性的方法相比，划痕试验方法效率高，劳动强度小。它在树木年代学和其他学科的进一步发展中具有很大的应用潜力。

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引用次数: 0

Investigating the age of the door of the King’s Chapel in Tallinn Dome 调查塔林圆顶国王教堂大门的年代

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-12-10 DOI: 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.

对塔林圣玛丽大教堂的一扇古老的门进行了树木年代学分析。门的结构由两个垂直的松木板组成，由两个倾斜的杆连接。门的外侧覆盖着水平橡木板，并在一侧镶有垂直杆。分析得出了两个不同的日期：松木木板的年代是公元1291年，而橡木木板的年代是公元1376年。橡木板上没有边材边缘，但在一些橡木板上保留了多达六个边材环。由此产生的时间上的差异需要调查门的可能的二次使用或同时施工。根据细木工的几个特点，这扇门的木板是同时制作的。这扇门很可能是在公元1378年到1394年之间制作的。这扇门可能是爱沙尼亚现存最古老的门。

引用次数: 0

Paleoenvironmental perspective of subfossil oaks from the Zapadnaya Dvina River 德维纳河亚化石栎树的古环境研究

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-12-09 DOI: 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.

虽然保存在冲积沉积物中的亚化石橡树代表了树木年代学信息的宝贵档案，但东欧在这方面仍未得到很大程度的探索。在这项研究中，我们调查了来自Zapadnaya Dvina （Daugava, Dzvina）河的亚化石橡树遗骸，这条河流经俄罗斯、白俄罗斯和拉脱维亚。亚化石栎树树干采集于位于Zapadnaya Dvina河上游（俄罗斯Zapadnaya Dvina镇附近）和中游（白俄罗斯Luchosa河）两个地点，分别包括545个和68个标本。从这两个地点共获得61个放射性碳定年。最早的亚化石橡树沉积于5800 ± 80C BP，而最近的样本可以追溯到20世纪。通过树木年代学分析和与邻近地区的橡树年代学交叉测年，得出了四种绝对确定的树木年轮年代学，时间跨度为公元250-1762年。通过对单个树木年轮的摆动匹配放射性碳测量，进一步验证了这些年表。此外，六个漂浮的树木年轮年表覆盖了公元前2千年和1千年，并进行了放射性碳测定。这些年表加在一起，涵盖了近4000年的历史，只有300年的短暂间隔。对该地区河流沉积物的亚化石橡树的持续采样有望弥合这些间隔，最终能够建立一个绝对确定的东欧几千年橡树年轮年表。

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引用次数: 0

A two-millennia provenance-assured Chamaecyparis tree-ring chronology for central Japan 日本中部两千年来源地确定的长环树年轮年表

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-12-05 DOI: 10.1016/j.dendro.2025.126461

Motonari Ohyama , Hitoshi Yonenobu , Yasuharu Hoshino , Shin’ya Suzuki

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.

我们提出了一个连续的2000年环宽年表的Chamaecyparis从日本中部的已知来源的样本为基础。该数据集整合了从公元前156年到公元2012年的活树、考古棺材、历史寺庙木材和地下森林的环宽序列。使用统计指数（学生t值，Gleichläufigkeit）和目视检查进行的交叉年代测定，在六个部分年表中产生了高度一致性。这种复合年代学填补了日本树木年代学的主要空白，为环境重建和树木起源提供了强有力的区域参考。将其应用于历史建筑，包括莲林寺和大德寺，与文献记录非常吻合，证实了年表的年代准确性。我们的发现重申了环宽度分析在确定木制材料的起源和年龄方面的价值，特别是在同位素地理分辨率可能太宽的情况下。这种年代学也为未来整合同位素或地球化学数据的多代理研究建立了一个强有力的框架。通过确保时间连续性和来源控制，它成为日本及其他地区考古学、森林史和文化遗产科学研究的重要资源。

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引用次数: 0

Dynamic characteristics of radial growth in Abies georgei var. Smithii in cold regions based on dendrometer monitoring 寒区乔吉冷杉径向生长动态特征研究——基于树木密度计监测

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-12-02 DOI: 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

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引用次数: 0