Dendrochronologia最新文献_第5页

Tree-ring-based reconstruction of aboveground biomass in Cryptomeria japonica forests in Eastern Himalaya: dynamics and management implications 东喜马拉雅地区柳杉森林地上生物量的年轮重建：动态和管理意义

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-15 DOI: 10.1016/j.dendro.2025.126431

Wagmare Balraju , Rupesh Dhyani , Rajesh Joshi , Mayank Shekhar , Parminder Singh Ranhotra , Amalava Bhattacharyya

Forests in the Eastern Himalaya play a key role in carbon sequestration; yet, limitations of long-term data constrain comprehensive assessments of aboveground biomass (AGB) and forest productivity over time. To address this gap, we used tree rings as proxy data to analyze the basal area increment (BAI) and AGB over the last four decades in three Cryptomeria japonica forest sites in the Fambonglho Wildlife Sanctuary, East Sikkim, India, using 90 tree core samples from 45 trees. Results showed common site-specific variability in BAI and AGB over time, with growth rates ranging from site-specific growth trends (BAI range 1–54 cm²). Stand-level AGB consistently increased from 15 to 19.80 t ha⁻¹ between 1990 and 2015 CE. Moderate seasonal correlations were observed between spring-seasons' (March-May) normalized difference vegetation index (NDVI) and AGB at two sites, suggesting a link between vegetation growth and biomass production. Additionally, a stronger and statistically significant correlation was observed at high-frequency temporal scales, indicating that fine-scale tree-ring derived AGB captures short-term fluctuations in biomass accumulation and photosynthetic activity. The findings highlight the value of integrating ground-based AGB estimates with remote sensing data to monitor forest productivity. This combined approach provides a practical and scalable framework for assessing site-specific forest performance and supports data-driven decision-making for carbon monitoring, climate change adaptation, and sustainable forest management in the Eastern Himalaya.

东喜马拉雅地区的森林在固碳方面发挥着关键作用；然而，长期数据的局限性限制了对地上生物量（AGB）和森林生产力的长期综合评估。为了解决这一空白，我们使用树木年轮作为代理数据，分析了印度东锡金Fambonglho野生动物保护区3个日本柳杉林样地近40年的基础面积增量（BAI）和AGB，使用了45棵树的90个树芯样本。结果显示，随着时间的推移，BAI和AGB具有共同的位点特异性变异性，其增长率从位点特异性生长趋势（BAI范围1-54 cm²）变化。1990年至2015年间，林分AGB从15持续增加到19.80 t ha⁻¹ 。春季（3 - 5月）归一化植被指数（NDVI）与AGB呈中度季节性相关，表明植被生长与生物量生产之间存在一定联系。此外，在高频时间尺度上观察到更强且具有统计学意义的相关性，表明精细尺度树木年轮衍生的AGB捕获了生物量积累和光合活性的短期波动。研究结果强调了将地面AGB估计值与遥感数据结合起来监测森林生产力的价值。这种综合方法为评估特定地点的森林绩效提供了一个实用且可扩展的框架，并为东喜马拉雅地区的碳监测、气候变化适应和可持续森林管理提供了数据驱动的决策支持。

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引用次数: 0

Pan-alpine summer temperatures since 742 CE 公元742年以来的泛阿尔卑斯夏季气温

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-12 DOI: 10.1016/j.dendro.2025.126432

Jan Esper , Frederick Reinig , Max Torbenson , Edurne Martinez del Castillo , Marcel Kunz , Alberto Arzac , Marco Carrer , Feng Chen , Alper K. Kadioglu , Alexander V. Kirdyanov , Ernesto Tejedor , Mirek Trnka , Ulf Büntgen

Albeit labor-intensive, tree-ring maximum latewood density (MXD) has become a prime proxy to reconstruct inter-annual to multi-centennial climate variability. We here combine such data from five valleys in Austria, France and Switzerland to present a June-September temperature history for the European Alps reaching back to 742 CE. The pan-alpine record correlates at r_1880–2023 = 0.89 with observational data and provides evidence for a prolonged Little Ice Age (LIA) from the 1250s to 1850s CE, during which summer temperatures were 0.59 °C cooler compared to the preceding Medieval Warm Period (MWP) from the 880s to 1240s CE. Temperatures rose by 3.65 °C from the coldest decade in the 1810s, which includes the 1816 CE post-Tambora “year without a summer”, to the warmest decade in the 2010s. The warmest summer in our reconstruction occurred in 2003 CE (+ 2.71 °C) and exceeds the warmest naturally forced summer in 970 CE (+ 2.19 °C) by more than 0.5 °C. This difference is non-significant, however, if we consider the increasing uncertainties back in time when fewer sites and trees contributed to the reconstruction. The pan-alpine record is the result of conducting MXD measurements over the past two decades in Swiss and German laboratories and sets a new standard in terms of explained variance and pre-instrumental temperature variability estimation in the European Alps.

树木年轮最大迟木密度（MXD）虽然是劳动密集型的，但已成为重建年际至百年气候变率的主要指标。在这里，我们将奥地利、法国和瑞士五个山谷的数据结合起来，呈现出欧洲阿尔卑斯山6月至9月的温度历史，可追溯到公元742年。泛高山记录在r1880-2023 = 0.89与观测资料相关，并提供了1250年代至1850年代的小冰期（LIA）延长的证据，在此期间，夏季气温比之前的中世纪暖期（MWP）低0.59 °C（880 - 1240年代）。从19世纪10年代最冷的十年（包括1816年的“无夏之年”）到2010年代最暖的十年，气温上升了3.65 °C。在我们的重建中，最热的夏季出现在2003年（+ 2.71 °C），比970年（+ 2.19 °C）最热的夏季高出0.5 °C以上。然而，如果我们考虑到重建过程中越来越少的场地和树木所带来的不确定性，这种差异就不显著了。泛阿尔卑斯记录是瑞士和德国实验室在过去二十年中进行MXD测量的结果，并在欧洲阿尔卑斯地区的解释方差和仪器前温度变率估计方面设定了新的标准。

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引用次数: 0

The underground forest: Tracing forest history in the Erzgebirge through the wood finds from the medieval silver mines of Dippoldiswalde 地下森林：通过从Dippoldiswalde中世纪银矿中发现的木材，追溯Erzgebirge的森林历史

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-11 DOI: 10.1016/j.dendro.2025.126429

Grit Neubauer , Ernst van der Maaten , Christiane Hemker , Marieke van der Maaten-Theunissen

The medieval silver rush profoundly impacted the landscape and vegetation of Europe’s mining regions, a phenomenon strikingly illustrated by the exceptionally well-preserved silver mines discovered in Dippoldiswalde (Eastern Erzgebirge/Saxony) in 2009. This study analyses over 2000 wooden finds collected in those mines, including 1183 specimens that help date the mining activities from the second half of the 12th century to the late 13th century, utilising dendrochronological techniques. Our extensive dendro-dataset provides a valuable resource for exploring various aspects, such as landscape and climatic change, the effects of mining on primary forests, and the selective use of wood in mining processes. The timber reveals new insights not only into previously unknown mining technologies but also into the primeval forest and early forest use.

Initially, miners exploited the forest non-selectively. As a result, early timber use provides important insights into the composition of primeval Fagus-Abies forests that once covered the region. By the 12th century, extensive timber use began to emerge, eventually leading to the complete deforestation of large areas in the mining regions of the Erzgebirge in the Middle Ages. This study underscores the valuable potential of dendrochronologically dating all available archaeological wood, rather than just selected samples, for advancing research in the fields of environmental history and medieval mining.

中世纪的淘金热深刻地影响了欧洲矿区的景观和植被，2009年在Dippoldiswalde （Erzgebirge东部/萨克森州）发现的保存异常完好的银矿就是一个很好的例证。这项研究分析了在这些矿山中收集的2000多个木制发现，其中包括1183个样本，这些样本利用树木年代学技术帮助确定了从12世纪下半叶到13世纪晚期的采矿活动。我们广泛的树木数据集为探索景观和气候变化、采矿对原始森林的影响以及采矿过程中木材的选择性使用等各个方面提供了宝贵的资源。这些木材不仅揭示了以前未知的采矿技术，而且还揭示了原始森林和早期森林利用的新见解。最初，矿工们没有选择性地开采森林。因此，早期木材的使用为了解曾经覆盖该地区的原始Fagus-Abies森林的组成提供了重要的见解。到了12世纪，木材的广泛使用开始出现，最终导致了中世纪额尔齐布尔格矿区的大面积森林被完全砍伐。这项研究强调了在推进环境历史和中世纪采矿领域的研究方面，对所有可用的考古木材进行年代学测年的宝贵潜力，而不仅仅是选定的样本。

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引用次数: 0

Large-scale atmospheric circulation controls intra-annual tree-ring oxygen isotope in the lower Yangtze River basin 大尺度大气环流控制长江下游年际树木年轮氧同位素

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-11 DOI: 10.1016/j.dendro.2025.126430

Qingyu Zhao , Chenxi Xu , Wenling An , Yucheng Liu , Zhengtang Guo

In the Asian monsoon region, the oxygen isotope ratios in precipitation (δ¹⁸O_ppt) are widely reported to be influenced by upstream convective activity, but short-term measurements have limited their further application. Tree-ring cellulose δ¹⁸O (δ¹⁸O_cell) is mainly influenced by δ¹⁸O_ppt and local relative humidity, and it has great potential for extending the application of δ¹⁸O_ppt. We present the intra-annual and annual variabilities of δ¹⁸O_cell of Pinus taiwanensis Hayata in the lower Yangtze River basin, China. Intra-annual δ¹⁸O_cell values show typical “V”-shaped patterns with the most depleted values occurring in the centre of each growth ring, similar to the variation of δ¹⁸O_ppt. Using statistical analysis and forward modeling on different timescales, we found that the seasonal tree-ring isotopic cycle was primarily controlled by δ¹⁸O_ppt, which depends on the large-scale atmospheric circulation. Additionally, seasonal δ¹⁸O_cell profiles were significantly linked with upstream processes, such as the tropical monsoon and outgoing longwave radiation (OLR) in the late or post monsoon season, across the upstream area. Local moisture conditions have a limited effect on intra-annual δ¹⁸O_cell. On the annual scale, δ¹⁸O_cell variability was controlled by both local moisture conditions and δ¹⁸O_ppt during the growing season; however, these relationships were unstable during the past 40 years. Due to the diverse primary drivers of δ¹⁸O_cell on different timescales, annual and seasonal δ¹⁸O_cell records of multi-centennial length may enable us to infer long-term variations in different climate signals separately, such as the strength of upstream convective activity, especially in the late or post monsoon season, on the seasonal scale.

在亚洲季风区，降水中的氧同位素比值（δ18Oppt）被广泛报道受到上游对流活动的影响，但短期测量限制了其进一步应用。树木年轮纤维素δ18O （δ18Ocell）主要受δ18Oppt和当地相对湿度的影响，δ18Oppt具有很大的推广应用潜力。研究了长江下游台湾松林δ 18cell的年际和年内变化特征。年际δ18Ocell值呈典型的“V”型分布，在各年轮的中心处δ18Oppt值耗竭最多，与年际δ18Oppt值变化相似。通过统计分析和不同时间尺度的正演模拟，我们发现季节树木年轮同位素循环主要受δ18Oppt控制，而δ18Oppt主要依赖于大尺度大气环流。此外，季节δ18Ocell剖面与上游过程（如热带季风和季风后期的输出长波辐射）有显著的联系。局地水分条件对年内δ 18cell的影响有限。在年尺度上，生长季δ18Ocell变化受当地水分条件和δ18Oppt共同控制；然而，在过去的40年里，这些关系并不稳定。由于δ18Ocell在不同时间尺度上的主要驱动因素不同，多年和季节δ18Ocell记录可以使我们在季节尺度上分别推断不同气候信号的长期变化，如上游对流活动强度，特别是季风后期或季风后的对流活动强度。

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引用次数: 0

Climate driven divergence of growth resilience of Picea crassifolia from semi-arid to semi-humid habitats 半干旱-半湿润生境下云杉生长恢复力的气候差异

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-10 DOI: 10.1016/j.dendro.2025.126428

Zhengdong Guo , Liang Jiao , Ruhong Xue , Yarong Qin , Kuan Zhang , Peng Zhang , Xuge Wang , Xin Yuan , Weiyin Shi

Analyzing the growth differences of Picea crassifolia across distinct habitats and elevational gradients will improve our understanding of tree climate adaptation strategies under climate change. Tree ring cores were collected from high, middle, and low elevation P. crassifolia stands in the Helan Mountains (dry habitat) and Qilian Mountains (humid habitat) of northwest China. We investigated radial growth dynamics, quantified the relative importance of temperature, precipitation, and drought on growth, and assessed ecological resilience patterns to drought stress. The results showed (1) trees in dry habitats exhibited an initial growth increase followed by decline, with drought dominating radial growth (50.90 %). In contrast, trees in humid habitats showed sustained growth acceleration primarily driven by temperature (69.96 %). (2) P. crassifolia in dry habitats adopted a survival-priority strategy characterized by low resistance–high recovery to drought stress, whereas humid habitat trees displayed a growth-priority strategy with high resistance–low recovery. (3) elevation gradients significantly amplified the divergence of P. crassifolia trade-off strategies in dry habitats (p < 0.05), but exerted minimal effects in humid habitats. Our research demonstrates that hydrothermal combinations drive growth divergence of P. crassifolia across habitats by modulating their climate responses and trade-off strategies. Differentiated forest management strategies are urgently needed to address growth decline in dry habitats and recovery risks in humid habitats.

分析不同生境和海拔梯度下云杉的生长差异，有助于我们更好地认识气候变化下树木的气候适应策略。对贺兰山（干燥生境）和祁连山（湿润生境）高、中、低海拔的沙棘林进行了年轮核采集。我们研究了径向生长动态，量化了温度、降水和干旱对生长的相对重要性，并评估了对干旱胁迫的生态恢复模式。结果表明：(1)干燥生境下树木的生长表现为先增后降，径向生长以干旱为主（50.90% %）；相比之下，潮湿生境的树木表现出持续的生长加速，主要是由温度驱动的（69.96 %）。(2)干燥生境的沙棘林对干旱胁迫表现出低抗性-高恢复的生存优先策略，湿润生境的沙棘林则表现出高抗性-低恢复的生长优先策略。(3)海拔梯度显著放大了干旱生境下沙棘林权衡策略的差异（p <； 0.05），但对湿润生境的影响很小。我们的研究表明，热液组合通过调节其气候响应和权衡策略，驱动了沙棘科植物在不同栖息地的生长差异。迫切需要采取差异化的森林管理战略，以解决干旱生境的生长下降和潮湿生境的恢复风险。

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引用次数: 0

Growth of Tamarix ramosissima Ledeb. is benefitting from the recent climate change at the southern Tarim basin, northwest China 柽柳生长发育的研究。中国西北部塔里木盆地南部最近的气候变化带来了什么好处

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-08 DOI: 10.1016/j.dendro.2025.126427

Maierdang Keyimu , Yanying Qi , Jianhua Peng , Yesi Zhao , Fanjiang Zeng

Tamarix ramosissima is a widely distributed shrub species in hyper arid areas of northwest China. However, the response of T. ramosissima radial growth to the recent “warm and humid” climate at the southern Tarim basin remains unclear. Here we collected disc samples of T. ramosissima in the desert oasis ecotone at the southern Tarim basin. We used dendrochronology techniques to process the samples and established tree – ring width chronology. Growth-climate relationship analysis revealed that the radial growth of T. ramosissima exhibited positive correlations with: (1) minimum temperature in the previous year autumn, winter, current spring, and early summer; (2) precipitation in late winter, current year spring, and early summer; and (3) drought in late autumn of the previous year, spring, and early summer of the current year. The moving correlation analysis demonstrated that the relationship between radial growth of T. ramosissima and minimum temperature during the constraining seasons gradually strengthened, while the relationship with precipitation, and drought index generally decreased. The above results suggest that the growth of T. ramosissima is benefiting from the current climatic conditions in this region, suggesting that its ecological shelterbelt functions might be improved.

柽柳（Tamarix ramosissima）是中国西北极度干旱区广泛分布的灌木树种。然而，柽柳径向生长对塔里木盆地南部近期“暖湿”气候的响应尚不清楚。本文在塔里木盆地南部沙漠绿洲过渡带采集了柽柳的盘状标本。我们使用树木年代学技术对样品进行处理，并建立了树木年轮宽度年代学。生长-气候关系分析表明，柽柳径向生长与前一年秋、冬、今春、初夏最低气温呈显著正相关；(2)冬末、当年春、初夏降水；(3)上一年深秋、今春、初夏的干旱。移动相关分析表明，约束季节柽柳径向生长与最低气温的关系逐渐增强，与降水、干旱指数的关系普遍减弱。上述结果表明，柽柳的生长得益于当前的气候条件，其生态防护林功能可能得到改善。

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引用次数: 0

Shrub-ring reconstruction of precipitation in the southeast of Tengger Desert, northwest China and its relationship with dust storm events 腾格里沙漠东南部降水的灌木环重建及其与沙尘暴事件的关系

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-06 DOI: 10.1016/j.dendro.2025.126426

Ai-Jun Ding , Sheng-Chun Xiao , Xiao-Mei Peng , Quan-Yan Tian

The transition from spring to summer marks the peak season for sandstorms in northern China, primarily driven by limited precipitation. However, a lack of long-term instrumental data and short monitoring records has impeded a comprehensive understanding of historical precipitation changes in arid desert regions. In this study, we reconstructed the April-May total precipitation history (1915–2017) using shrub ring data from two sites located on the southeastern edge of the Tengger Desert. Since 1915, the region has experienced four major drought periods (the 1920s, 1937–1962, the 1970s, and the 2000s) and one wet period (1983–1991). The reconstructed series shows a significant negative correlation with the variation in the number of dust storm days in China from March to May. Notably, the drought years of 1957, 1973, 2000–2001, and 2006, which were accompanied by frequent dust storm events, correspond closely with the reconstructed data. This alignment suggests that other identified years, including 1917, 1937, 1940–1942, 1951, and 1953, likely also experienced frequent dust days.

从春季到夏季的过渡标志着中国北方沙尘暴的高峰期，主要是由有限的降水驱动的。然而，长期仪器数据和短期监测记录的缺乏阻碍了对干旱沙漠地区历史降水变化的全面了解。本研究利用腾格里沙漠东南缘两个站点的灌木环数据重建了4 - 5月的总降水历史（1915-2017）。自1915年以来，该地区经历了四个主要干旱期（1920年代、1937-1962年、1970年代和2000年代）和一个湿润期（1983-1991年）。重建序列与3 ~ 5月中国沙尘暴日数变化呈显著负相关。值得注意的是，1957年、1973年、2000-2001年和2006年的干旱年份，伴随着频繁的沙尘暴事件，与重建的数据非常吻合。这种排列表明，其他确定的年份，包括1917年、1937年、1940-1942年、1951年和1953年，可能也经历了频繁的沙尘日。

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引用次数: 0

Complex growth responses of riparian tree species to dam-related hydrological alterations at their climatic niche limits 河岸树种在其气候生态位极限下对大坝相关水文变化的复杂生长响应

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-03 DOI: 10.1016/j.dendro.2025.126425

Irati Sanz-Zubizarreta , Idoia Biurrun , Nere Amaia Laskurain , Patricia María Rodríguez-González

Artificial dams disrupt natural river flows, endangering riparian trees and their ecosystems. We studied the impact of a dam located in the transition from temperate to Mediterranean climate in SW Europe. We used dendrochronological analysis on 250 individuals of three widespread riparian tree species (Alnus glutinosa, Fraxinus angustifolia, F. excelsior) to evaluate their growth responses to climatic and dam-related hydrological changes. Growth patterns differed among species, with Alnus glutinosa showing a stable tendency, while both Fraxinus species exhibited greater variability. Temperature was the most limiting factor for the three species, but climate-growth relationship was species-specific. The increase in the average annual temperature favoured Alnus glutinosa and F. angustifolia but limited F. excelsior growth, revealing the vulnerability to rising temperatures of F. excelsior rear-edge populations in the warmest margins of the species climatic niche. Additionally, rising summer temperatures reduced the growth of Alnus glutinosa and Fraxinus angustifolia in the sub-Mediterranean zone. The dam altered the river’s hydrology, changing a unimodal annual flow pattern to a bimodal one with higher summer water discharge. This shift favoured the annual growth of dam-affected Alnus glutinosa and Fraxinus angustifolia trees. However, the resilience and resistance of the latter to cope with dry years significantly decreased after the dam’s construction compared with the control sections. This may place a long-term risk for key structural trees in these riparian ecosystems, especially under climate change scenarios with increasing droughts, underscoring the importance of implementing ecological flow regimes as a mitigation strategy.

人工水坝破坏河流的自然流动，危及河岸树木及其生态系统。我们研究了位于欧洲西南部从温带气候向地中海气候过渡的一座大坝的影响。本文对三种分布广泛的河岸树种（Alnus glutinosa, Fraxinus angustifolia， F. excelsior）的250株树木进行了年代学分析，以评估其生长对气候和大坝水文变化的响应。不同树种间的生长模式存在差异，Alnus glutinosa表现出稳定的趋势，而两种黄曲霉都表现出较大的变异性。温度是3种植物的最大限制因子，但气候-生长关系存在物种特异性。年平均气温的升高有利于黄桤木（Alnus glutinosa）和金针叶桤木（F. angustifolia）的生长，但限制了黄针叶桤木（F. excelsior）的生长，揭示了黄针叶桤木后缘种群在物种气候生态位最温暖边缘对温度升高的脆弱性。此外，夏季气温的升高降低了亚地中海地区的Alnus glutinosa和Fraxinus angustifolia的生长。大坝改变了河流的水文，将单峰年流量模式转变为夏季水量较大的双峰流量模式。这种转变有利于受水坝影响的桤木和白蜡树的年生长。然而，大坝建设后，后者对干旱年的抗逆性和抗逆性较对照段明显下降。这可能给这些河岸生态系统中的关键结构树木带来长期风险，特别是在干旱日益加剧的气候变化情景下，这突出了作为缓解战略实施生态流量制度的重要性。

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引用次数: 0

Establishing ring width and cell chronologies for predicting future growth of Thuja koraiensis under climate change 建立环宽和细胞年代学，预测气候变化下红树的未来生长

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-02 DOI: 10.1016/j.dendro.2025.126423

Jun-Hui Park , En-Bi Choi , Ho-Young Lee , Jeong-Wook Seo

The present study reports the first dendrochronological analysis of a vulnerable conifer shrub, Thuja koraiensis, which is endemic to the Korean Peninsula. Two study sites, Hwangcheolbong and Gwittaegicheongbong, were selected, and ring-width chronologies were established for each site: 188 years (1836–2023) for the former and 113 years (1911–2023) for the latter. Additionally, cell chronologies of specific anatomical parameters, viz., cell diameter, lumen diameter, and cell wall thickness were also built from 1947–2023 for the Gwittaegicheongbong site. Correlation analysis revealed that the ring-width growth of T. koraiensis is primarily influenced negatively by temperatures in May and June, and positively by precipitation. Although similar results were found in the correlation analysis between the cell chronologies of cell and lumen diameters and monthly climate at Gwittaegicheongbong, the correlation with May and June temperatures were higher (r = -0.27 to −0.35) than ones of ring-width chronologies (r = -0.18 to −0.28). Future ring-width growth predictions using ARIMAX models under SSP scenarios revealed site- and parameter-specific differences. At Hwangcheolbong, ring width was predicted to decline by 13.9 % under SSP2–4.5 and by 39.0 % under SSP5–8.5 by 2100, with most of the reduction occurring after 2050 (-29.4 %). At Gwittegicheongbong, ring width remained stable under SSP2–4.5 (+1.7 %) but declined under SSP5–8.5 (-19.0 %). For cell parameters at Gwittegicheongbong, cell diameter decreased by 2.2 % under SSP2–4.5 and 15.3 % under SSP5–8.5, while lumen diameter showed the steepest decline (-23.3 %) under SSP5–8.5, indicating reduced hydraulic efficiency in high-emission scenarios. These findings highlight the climatic vulnerability of T. koraiensis and demonstrate the importance of dendroanatomical approaches for detecting climate-induced stress in alpine shrubs. Such insights provide critical information for the conservation of Korea’s subalpine ecosystems.

本研究报告了朝鲜半岛特有的一种易损针叶树灌木——红树（Thuja koraiensis）的首次树木年代学分析。选择黄铁峰和桂太清峰两个研究地点，分别建立了188年（1836-2023年）和113年（1911-2023年）的环宽年表。此外，从1947年到2023年，还建立了具体解剖参数的细胞年表，即细胞直径、管腔直径和细胞壁厚度。相关分析表明，5月和6月气温对红松环宽生长的影响主要为负，降水对其生长的影响主要为正。虽然在桂太池青峰的细胞和管腔直径年代学与月气候的相关性分析中发现了类似的结果，但与5月和6月气温的相关性（r = -0.27 ~ - 0.35）高于环宽年代学（r = -0.18 ~ - 0.28）。在SSP情景下使用ARIMAX模型进行的未来环宽增长预测揭示了特定地点和参数的差异。在黄铁峰，到2100年，在SSP2-4.5和SSP5-8.5下，环宽预计分别减少13.9 %和39.0 %，其中大部分减少发生在2050年之后（-29.4 %）。在Gwittegicheongbong，环宽在SSP2-4.5下保持稳定（+1.7 %），在SSP5-8.5下下降（-19.0 %）。对于Gwittegicheongbong的池参数，在SSP2-4.5和SSP5-8.5下，池直径分别下降了2.2 %和15.3 %，而管腔直径在SSP5-8.5下下降幅度最大（- 23.3% %），表明在高排放情景下水力效率降低。这些发现突出了红松的气候脆弱性，并证明了树木解剖学方法在高山灌木中检测气候诱导胁迫的重要性。这些见解为保护韩国的亚高山生态系统提供了重要信息。

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Cumulative droughts and legacy effects decreased long-term growth resilience in Pinus massoniana in the middle Dabie Mountains 大别山中游马尾松的长期生长恢复力因累积干旱和遗留效应而下降

IF 2.3 3区农林科学 Q1 FORESTRY

Dendrochronologia

Pub Date : 2025-10-01 DOI: 10.1016/j.dendro.2025.126424

Yameng Liu , Jinkuan Li , Jianfeng Peng , Jiaxin Li , Xiaoxu Wei , Keyu Zhang

Global warming has increased the frequency and intensity of droughts, thereby increasing the risk of forest decline and mortality. Although the negative impacts of drought on tree growth have been extensively studied, the mechanisms underlying tree growth resilience to cumulative drought effects and legacy responses remain poorly understood. Using tree-ring width and basal area increment analyses in the Dabie Mountains ecotone, a critical climate transition zone in China, we reveal that: (1) High-temperature-induced drought stress during mid-growing season (June-July) result in the primary constraint on radial growth because of the strong positive correlation between radial growth and the Standardized Precipitation Evapotranspiration Index, highlighting the vulnerability to drought of trees in this transition-zone; (2) A fundamental trade-off between resistance and recovery shapes drought resilience: increasing drought frequency reduces resistance but enhances recovery, while drought intensity effects are context-dependent, collectively driving nonlinear responses; (3) Drought legacy effects induce persistent radial growth decline through reduced biomass accumulation. These findings provide critical ecophysiological insights for modeling forest resilience in transitional ecosystems under climate change scenarios.

全球变暖增加了干旱的频率和强度，从而增加了森林退化和死亡率的风险。尽管干旱对树木生长的负面影响已经得到了广泛的研究，但树木生长对累积干旱影响和遗留响应的恢复能力机制仍然知之甚少。通过对大别山过渡带的树轮宽度和基面积增量分析，发现：(1)生长季中期（6 ~ 7月）的高温干旱胁迫是影响树木径向生长的主要因素，径向生长与标准化降水蒸散指数呈显著正相关，突出了过渡带树木对干旱的脆弱性；(2)抗旱性和恢复性之间的基本权衡决定了抗旱性：干旱频率的增加降低了抗旱性，但增强了抗旱性，而干旱强度的影响依赖于环境，共同驱动非线性响应；(3)干旱遗留效应通过减少生物量积累导致持续的径向生长下降。这些发现为气候变化情景下过渡生态系统森林恢复力的建模提供了重要的生态生理学见解。

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引用次数: 0