Dendrochronologia最新文献

{"title":"Evaluating optimal percentile pairs for a Weibull-based diameter distribution in European black pine stands","authors":"Onur Alkan","doi":"10.1016/j.dendro.2025.126341","DOIUrl":"10.1016/j.dendro.2025.126341","url":null,"abstract":"<div><div>Understanding the diameter distribution of forest stands is essential for sustainable forest management, as it offers critical information about stand structure, growth dynamics, and potential timber yield. This study aims to identify the optimal percentile pairs and the most suitable modeling approaches for characterizing the diameter distribution of European black pine (<em>Pinus nigra</em> Arn.) stands in Türkiye via a three-parameter Weibull distribution. A Percentile-based recovery method was utilized for recovering the Weibull parameters. Eight percentile pairs (10th and 90th, 25th and 50th, 25th and 75th, 31st and 63rd, 31st and 95th, 50th and 75th, 50th and 95th, and 63rd and 75th percentiles) were evaluated through four different estimation approaches: ordinary least squares (OLS), seemingly unrelated regression (SUR), cumulative distribution function regression (CDFR), and stand table regression (STR). The results indicate that the percentile pair 31st and 63rd, when combined with CDFR, demonstrated the highest overall performance. In contrast, the 50th and 75th pairs combined with OLS and SUR demonstrated a lower performance. Among the estimation approaches, CDFR consistently achieves the best parameter recovery across most percentile pairs, whereas OLS and SUR often result in less accurate estimations. These findings suggest that specific percentile pairs, particularly 31st and 63rd, in combination with CDFR, offer superior characterization of diameters in black pine stands. This study provides a comprehensive evaluation of different percentile pairs and estimation approaches, contributing valuable information for forest management and modeling practices.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126341"},"PeriodicalIF":2.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873377","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":"Rethinking ‘clearcut’ methods: Embracing methodological diversity in pointer-year detection","authors":"Ernst van der Maaten ,&nbsp;Gottfried Jetschke ,&nbsp;Marieke van der Maaten-Theunissen","doi":"10.1016/j.dendro.2025.126338","DOIUrl":"10.1016/j.dendro.2025.126338","url":null,"abstract":"","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126338"},"PeriodicalIF":2.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843314","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":"Improving the climate signal of tree-ring blue intensity of sub-fossil wood using hydrogen peroxide: An example from the gulf of Alaska, USA","authors":"Wenshuo Zhao ,&nbsp;Junpeng Fu ,&nbsp;Nick Wiesenberg ,&nbsp;Benjamin V. Gaglioti ,&nbsp;Gregory C. Wiles","doi":"10.1016/j.dendro.2025.126340","DOIUrl":"10.1016/j.dendro.2025.126340","url":null,"abstract":"<div><div>Blue intensity (BI) in tree-rings is a proxy for maximum latewood density (MXD) and has been widely used to reconstruct annual growing-season temperatures. BI records are more easily produced than MXD because their measurement requires fewer resources, however, there remain obstacles with samples that have color differences not related to wood density. Color differences between stained sub-fossil logs and unstained living trees in particular can cause systematic shifts in BI chronologies and thus limit paleoclimate reconstructions. Here we report on a promising treatment for sub-fossil wood destaining using hydrogen peroxide (H₂O₂) on mountain hemlock (<em>Tsuga mertensiana</em>) logs that were overrun by glaciers and preserved in sediments for several centuries from sites along the Gulf of Alaska (GOA). We found that the removal of this taphonomic wood staining is best accomplished using a 24-h bath in 12 % hydrogen peroxide (H₂O₂) at room temperature. The bleaching may have been achieved through the oxidative de-chelation of the Fe species from the Fe-tannate complex which is thought to be the source of wood color stain. BI measurements made before and after bleaching of 60 samples spanning 682 years indicate that the destaining leads to an improved inter-correlation of BI indices. This included a 26 % higher correlation for delta BI, 19 % higher for latewood and 7 % greater for earlywood BI. The standard deviation for delta BI measurement also increased after the treatment (0.071–0.090). We further tested the potential improvement of the climate signal after soaking by comparing an independent temperature reconstruction based on ring-widths through the 1050–1350 CE interval, which showed an improved climate signal for all BI parameters in terms of the variance of temperature explained after soaking. This includes a 19 % higher improvement for latewood BI, 5 % higher for delta BI and 12.5 % higher with the post-treatment earlywood BI. Furthermore, EPS and Rbar chronology statistics were significantly improved and the improvement is relatively insensitive to the standardization used. This work documents how H₂O₂ destaining can improve the development of mountain hemlock BI tree-ring records and that it could potentially help in similar BI chronologies that include stained sub-fossil samples.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126340"},"PeriodicalIF":2.7,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867815","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":"Correcting the heartwood-sapwood transition in blue intensity measurements with change point detection methods","authors":"Hung T.T. Nguyen ,&nbsp;Rory Abernethy ,&nbsp;Rob Wilson ,&nbsp;Daniel L. Druckenbrod ,&nbsp;Kathryn J. Allen ,&nbsp;Brendan M. Buckley ,&nbsp;Edward R. Cook ,&nbsp;Rosanne D’Arrigo ,&nbsp;Jonathan G. Palmer","doi":"10.1016/j.dendro.2025.126336","DOIUrl":"10.1016/j.dendro.2025.126336","url":null,"abstract":"<div><div>Delta blue intensity is a commonly used method to correct for the heartwood-sapwood color change in blue intensity (BI) measurements. It is based on the assumption that the heartwood-sapwood color change is similar in both earlywood and latewood. This assumption has not been supported physiologically. Furthermore, delta BI may confound the climate signals in earlywood and latewood BI as it is technically a linear combination of the other two. Here, instead of using delta BI, we used change point detection to identify the heartwood-sapwood transition, and corrected for the color change by rescaling the mean and variance of BI measurements after the transition to those immediately before. We tested three different change point detection methods and found that they agreed well with one another. Importantly, our approach preserves the climate signals in both earlywood and latewood BI data, while delta BI causes a total loss of climate signals in our test case. Therefore, we suggest that change point detection should be used instead of delta BI to account for the heartwood-sapwood color change.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126336"},"PeriodicalIF":2.7,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864819","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":"Cork-ring width responds to climate depending on local site dryness","authors":"J. Julio Camarero ,&nbsp;Ángel Fernández-Cortés ,&nbsp;Michele Colangelo","doi":"10.1016/j.dendro.2025.126339","DOIUrl":"10.1016/j.dendro.2025.126339","url":null,"abstract":"<div><div>Cork, the bark of cork oak (<em>Quercus suber</em>), is a major non-wood forest product in the Mediterranean Basin, but its future production will depend on forecast warmer and drier conditions. The comparison of topographically contrasting sites, subjected to different soil water availability, may be used as an analogous situation to projected aridification. We quantified cork and wood production and cork responses to climate variability and drought indices at dry (slope ridge) and wet (valley bottom) sites located in a relict cork oak population in north-eastern Spain. We also calculated intrinsic water-use efficiency cork (iWUE) by analysing C isotope ratios (δ¹³C) in annual cork samples. In the wet site, tree- and cork-rings were wider than in the dry site, where cork δ¹³C and iWUE were higher, particularly during moderate droughts. Cork and radial growth covaried in both sites and the slopes of their linear regressions were similar between dry and wet sites. In the dry site, cork width increased as June-July soil moisture did, whereas cork iWUE decreased as May soil moisture increased. Moist soil conditions in the prior October and March also enhanced cork growth at both sites, whilst wet prior winter conditions reduced cork iWUE at the dry site. Our findings show how cork production depends on local soil water availability. Cork δ¹³C can be used and combined with wood information to trace the physiological status of cork oak trees in response to drought stress.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126339"},"PeriodicalIF":2.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815075","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":"Local timber dominated pre-industrial construction: Insights from archival and dendrochronological data","authors":"Péter Szabó ,&nbsp;Petr Dobrovolný ,&nbsp;Tomáš Kolář ,&nbsp;Michal Rybníček ,&nbsp;Josef Kyncl ,&nbsp;Tomáš Kyncl","doi":"10.1016/j.dendro.2025.126337","DOIUrl":"10.1016/j.dendro.2025.126337","url":null,"abstract":"<div><div>In pre-modern Europe, timber was notoriously difficult and costly to transport on land, therefore it is usually assumed that ordinary buildings – except for those close to navigable watercourses – were constructed using timber from local sources. We hypothesized that species of timber used in constructions prior to the late 19th century were commonly available in forests within a short distance from the location of the constructions. To test this hypothesis, we compared high-resolution archival information on the tree species composition of forests in Moravia (eastern Czech Republic, ca. 27,000 km²) in the 18th and 19th centuries to a database of 1231 dated timber constructions in the same region and period. Our analysis was based on the mutual distances between the locations of timber constructions and the occurrences of forests with the given tree species. We compared real distances with distances obtained through random simulations. Results showed that in more than half of the cases, the tree species from constructions occurred in the forests of the same township. In the rest of the cases, the modal distance values to the centroid of the nearest township where the same species was present in the forests were usually less than two kilometres and distances larger than five kilometres were generally rare. While our results testify to the availability of timber rather than to the direct source of particular pieces of timber, they strongly suggest that timber was usually sourced locally. We believe our interdisciplinary study demonstrated the usefulness of archival data in the research of timber sourcing. For future studies, we see the combination of our approach with dendroprovenancing and other natural scientific methods as the most promising way to gain deeper knowledge on the sourcing of timber.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126337"},"PeriodicalIF":2.7,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815127","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":"Longleaf pine in the low countries","authors":"Sjoerd van Daalen ,&nbsp;Paul Borghaerts ,&nbsp;Mukund Palat Rao","doi":"10.1016/j.dendro.2025.126333","DOIUrl":"10.1016/j.dendro.2025.126333","url":null,"abstract":"<div><div>Among the species used for dendrochronology in the Low Countries, pine from the North American continent represents a small and possibly overlooked subset. Southern Yellow Pine is the collective name for a number of pine species (<em>Pinus spp</em>.) of which longleaf pine (<em>P. Palustris</em> Mill.) is of prime importance. The wood anatomy of longleaf pine is easily confused with the far more common Scots pine (<em>Pinus sylvestris</em> L.), Additionally, longleaf pine did not appear in the Low Countries until relatively recently, meaning it can be found in objects which can be dated through other means than dendrochronology, typically archival sources. In this study we present a chronology for longleaf pine, as well as its distinguishing (wood anatomical) features, application and provenance details to enable further research into the scope of this trans-Atlantic timber trade.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126333"},"PeriodicalIF":2.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824288","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":"Impacted radial growth of birch in the East-Ural Radioactive Trace Zone: Effects of ionizing radiation or of competition, weather conditions, and phytophages?","authors":"Makar Modorov,&nbsp;Vladimir Kukarskih,&nbsp;Ludmila Mikhailovskaya,&nbsp;Anna Komarova,&nbsp;Varvara Bessonova,&nbsp;Vera Pozolotina","doi":"10.1016/j.dendro.2025.126331","DOIUrl":"10.1016/j.dendro.2025.126331","url":null,"abstract":"<div><div>Tree ring analysis offers a historical record of environmental conditions spanning decades to millennia. We studied the relationship between the annual radial growth of silver birch (<em>Betula pendula</em> Roth) and the radioactive contamination levels of forests impacted by the Kyshtym accident (1957), a major nuclear incident. The overall effect of the radiation event from the Kyshtym accident appears to be inconsistent (increased and decreased growth) for the first two decades following the incident. Given the multitude of variables involved, it is challenging to establish a singular causal relationship. Initially, the combination of irradiation, drought, and spongy moth (<em>Lymantria dispar</em> L.) outbreaks significantly reduced radial tree growth. By 1960, short-lived radionucleotides had decayed significantly, resulting in a 100–1000 fold decrease in γ radiation exposure at the most contaminated sites, while radiosensitive pine (<em>Pinus sylvestris</em> L.) died in mixed pine–birch forests. From 1960–1967, birch trees at sites with dead pines and moderate contamination experienced the greatest radial growth from reduced competition, but smaller radial growth at heavily contaminated sites, recovering in 1973–1978 despite a major drought. From 1979–2019, birch tree radial growth in the East-Ural Radioactive Trace (EURT) and control sites remained stable.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126331"},"PeriodicalIF":2.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815074","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":"On the meaning of community-level tree-growth signal in a tropical forest restoration","authors":"Gabriela Morais Olmedo ,&nbsp;Juliano Morales de Oliveira ,&nbsp;Maycon da Silva Teixeira ,&nbsp;Guilherme José Mores ,&nbsp;Vera Lex Engel ,&nbsp;Mario Tomazello-Filho","doi":"10.1016/j.dendro.2025.126334","DOIUrl":"10.1016/j.dendro.2025.126334","url":null,"abstract":"<div><div>Ecological restoration is a global need, particularly in the tropics. Dendrochronological research could boost basic and applied knowledge for tropical restoration projects. Here, we explored whether trees in restoration programs of the Atlantic Rainforest form growth rings prone to crossdating and analysis of climatic signals. We analyzed 43 trees distributed across the 18 most common species in two restoration stands. Trees (35) from all the species evidenced crossdatable growth rings, allowing us to construct a robust multi-species ring-width chronology. This unprecedented community-level signal in the tropics was determined by a one-year lagged tree-growth response to water availability and temperature. The dynamics of non-structural carbohydrates (NSC) are likely involved in this delayed climatic effect. Relatively homogeneous light conditions among trees in the stands would be critical for detecting the growth signal. Whether such a community-level signal would be found elsewhere and the role of NSC in mediating tree growth responses to climate deserve further investigation. Tree-ring analysis allowed us to assess the climatic sensitivity of a forest community undergoing restoration and could further address several other relevant issues towards restoring tropical ecosystems. On the other hand, restoration projects offer a unique experimental setting to advance tropical dendrochronology.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126334"},"PeriodicalIF":2.7,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791903","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":"Understanding physiological mechanisms of European beech dieback responses to climate using a triple isotope approach in northern Switzerland","authors":"Anna Neycken ,&nbsp;Marco M. Lehmann ,&nbsp;Matthias Saurer ,&nbsp;Thomas Wohlgemuth ,&nbsp;Esther R. Frei ,&nbsp;Mathieu Lévesque","doi":"10.1016/j.dendro.2025.126335","DOIUrl":"10.1016/j.dendro.2025.126335","url":null,"abstract":"<div><div>To investigate which physiological predispositions led to the drought-induced vitality decline in beech (<em>Fagus sylvatica</em> L.) following the severe 2018 drought, we studied trees with premature leaf discoloration and shedding (early-browning trees) and trees showing no symptoms (vital trees) in a forest in northern Switzerland. We analyzed annual tree-ring width (TRW) and applied a triple isotope approach (i.e., carbon (δ¹³C), oxygen (δ¹⁸O), and hydrogen (δ²H) isotopes) in tree-ring cellulose for the period 1960–2020. To retrieve tree physiological responses, we normalized the tree-ring δ values to temporal isotopic variations in CO₂ or precipitation (Δ). Δ¹³C and Δ¹⁸O values suggest that the early-browning trees had a more conservative water-use strategy and lower stomatal conductance than the vital trees in the initial decades of the measurement period. However, several decades before the onset of crown dieback in 2018, the early-browning trees showed a decrease in TRW and an increase in Δ²H, suggesting a higher use of carbon reserves for the early-browning trees. These long-term trends may be the first signs of a progressive deterioration of the physiology of the early-browning trees. During and after the 2018 drought, changes in Δ²H suggested high carbon investments into drought damage repair for the early-browning trees. Moreover, a higher TRW and isotope sensitivity to previous year’s summer climate in early-browning than vital trees suggests stronger negative carry-over effects. Our findings highlight that the early-browning trees may have already been weakened before the 2018 drought, eventually pushing them beyond their physiological tipping points and inducing dieback.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"91 ","pages":"Article 126335"},"PeriodicalIF":2.7,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807325","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}