Dendrochronologia最新文献

{"title":"Daily and seasonal patterns of stem diameter micro-variations in three semiarid forest species in relation to water status and environmental factors","authors":"Mei-Jun Liu ,&nbsp;Qiu-Wen Chen ,&nbsp;Hai-Ning Guo ,&nbsp;Jinlin Lyu ,&nbsp;Guoqing Li ,&nbsp;Sheng Du","doi":"10.1016/j.dendro.2023.126146","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126146","url":null,"abstract":"<div><p><span><span>Understanding the relationship between stem diameter micro-variation (SDMV) and stem water status and revealing the mechanism regulating stem water are essential for elucidating environmental adaptation and water use strategies in forest trees. Here, we report the results of the year-round monitoring (November 2018–October 2019) of SDMV and xylem sap flow obtained using high-resolution </span>dendrometers<span> and Granier-type thermal dissipation probes, respectively, in mature trees of three species in the semiarid Loess Plateau region: </span></span><span><em>Quercus</em><em> liaotungensis</em></span>, <span><em>Platycladus orientalis</em></span>, and <span><em>Robinia pseudoacacia</em></span><span>. The year-round trend for the variations in stem diameter can be divided into phases of a decreasing period and a relatively stable period in the non-growing season, and a progressive rise and fluctuating plateau throughout the growing season. The observed interspecific differences in the time to full recovery from the water deficit state corresponded to species phenology<span> and soil moisture conditions. These differences were manifested as the responses of sap flux density (</span></span><em>F</em>_<em>d</em><span>) and tree water deficit (TWD) to variations in soil water content during the growing season. </span><em>Q. liaotungensis</em><span> implements stomatal regulation early to avoid drastic water loss in the trunk, </span><em>P. orientalis</em> maintains a relatively stable <em>F</em>_<em>d</em> at the expense of increased TWD under soil drought, and <em>R. pseudoacacia</em><span><span> maintains relatively low stomatal conductance under soil drought with an increase in TWD. The results revealed that SDMV is determined by the stem water status and species-specific strategies for water use, which could provide beneficial information for forestation practices in </span>semiarid regions.</span></p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91959181","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":"Contrasting impacts of climate warming on Himalayan Hemlock growth: Seasonal and elevational variations","authors":"Samresh Rai ,&nbsp;Jan Altman ,&nbsp;Martin Kopecký ,&nbsp;Kristina Sohar ,&nbsp;Pavel Fibich ,&nbsp;Vít Pejcha ,&nbsp;Jiří Doležal","doi":"10.1016/j.dendro.2023.126144","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126144","url":null,"abstract":"<div><p><span>Ongoing climate change can have varying impacts on tree growth within the growing season and across their elevation ranges, with important implications for forest ecosystem functions and services. However, our knowledge of these effects on climate-sensitive Himalayan forests is still limited. Here, we explore the elevational changes in climatic factors driving long-term changes in the radial growth of Himalayan Hemlock (</span><span><em>Tsuga</em><em> dumosa</em></span><span>), including recent responses to unprecedented climate warming in the central Himalayas<span>. We evaluated several growth parameters, including total ring width, earlywood<span> width, adjusted latewood width, and maximum latewood density, in unique &gt; 400-year-old forests along an elevational gradient of 2500–3100 m on the southern slopes of Dhaulagiri, Nepal. Our findings show that changing climatic conditions, characterized by increasing temperatures and variable precipitation patterns, had a more detrimental effect on </span></span></span><em>Tsuga</em> growth at the edge of its elevation range compared to the optimal mid-elevation zone. Specifically, at lower elevations, the combination of spring and preceding autumn warming restricted earlywood growth, while warmer temperatures in late summer stimulated growth at the mid-elevation site by alleviating the cool growth-limiting conditions caused by high monsoonal precipitation. Furthermore, increased spring temperatures enhance latewood density, while summer warming promotes latewood growth at higher elevations. Additionally, we observed that the recent rise in autumn temperatures has begun to impede <em>Tsuga</em> growth across all elevations. In conclusion, our study reveals that the growth of <em>Tsuga</em> trees is influenced by multiple climatic factors that vary within the growing season and across different parts of its elevation range. Recent spring warming has constrained growth in lower elevations, while higher previous autumn temperatures have reduced growth at both higher and lower boundaries of the species' range. These findings contribute to a better understanding of the complex relationship between climate change and tree growth dynamics, particularly in vulnerable Himalayan forests.</p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92033266","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":"Growth analysis highlights the fire-resistance of a ruderal species in the Atlantic Forest","authors":"Rafael P. Albuquerque ,&nbsp;Arno F.N. Brandes ,&nbsp;Leonardo B. Nascimento ,&nbsp;Jerônimo B.B. Sansevero ,&nbsp;Andrea Sánchez-Tapia ,&nbsp;Warlen S. Costa ,&nbsp;Claudia F. Barros","doi":"10.1016/j.dendro.2023.126143","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126143","url":null,"abstract":"<div><p>Fire-resistant species may have an essential ecological role in the natural regeneration process of degraded landscapes. <em>Moquiniastrum polymorphum</em> is a ruderal and fire-resistant species that occupies fire-disturbed areas in Brazilian Atlantic Forest. Evaluating a species’ growth sensitivity to fire and climate can help understand its complex successional process. In the present study, we used dendrochronology to describe the radial growth trajectories of <em>M. polymorphum</em> in a fire-disturbed area in the Atlantic Forest (Poço das Anta Biological Reserve), detect post-fire effects on the species’ growth, and investigate climate-growth relationships. We described the long-term growth trend of the species, it increased in the first years and was constant in the following years. The chronology was positively correlated with precipitation and negatively correlated with temperature at the end of the rainy season. Our results reveal that <em>M. polymorphum</em> did not reduce its growth after fire events. When observing through an epoch perspective, fire can even be positive to the species growth. These growth results indicated species fire resistance, which likely provides a resilient tree cover after forest fires and allows disturbed Atlantic Forest environments to break grass-fire cycles. This resistance may have a direct relationship with the opportunistic characteristic of the species in fire-prone areas in the Atlantic Forest. However, we highlight the critical role this species plays in the natural regeneration of burned sites in the Atlantic Forest.</p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49759097","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":"Spatial and temporal variation of Fagus sylvatica growth in marginal areas under progressive climate change","authors":"Nina Škrk Dolar ,&nbsp;Edurne Martinez del Castillo ,&nbsp;Roberto Serrano-Notivoli ,&nbsp;Martín de Luis Arrillaga ,&nbsp;Klemen Novak ,&nbsp;Maks Merela ,&nbsp;Katarina Čufar","doi":"10.1016/j.dendro.2023.126135","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126135","url":null,"abstract":"<div><p>The escalating decline in growth trends of European beech (<em>Fagus sylvatica</em>) observed across its distribution area pose a major ecological and economic challenge for countries with a high proportion of beech, such as Slovenia. In this study, the effects of climate change were examined at a high-resolution scale, encompassing the large climatic, orographic, and ecological variability of beech forests in Slovenia. Using basal area increment data (BAI) from a tree-ring network (48 sites in Slovenia), modelled climate data, and generalized linear mixed models (GLMM), we found an average growth decline of 11% between the 1953–1985 and 1986–2018 subperiods, affecting 90.5% of the forest stands. Based on climate data, we defined two contrasted marginal areas of beech presence (warm and cold) and analysed the growth changes over time. The warm marginal areas, which predominate near the geographical margin of beech distribution with a sub-Mediterranean climatic regime, were most affected by growth decline, threatening the survival of beech populations in the area. In contrast, cold marginal areas, mainly at high elevations in the Alps, where beech growth had previously been limited by low temperatures, turned out to be the only ones where growth of beech increased under prevailing warming conditions. Consequently, high elevation regions harbour climatic potential for increased beech growth performance, and may represent areas of future expansion of the species.</p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49751614","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":"Inter-tree correlation and climatic response of tree-ring δ18O in Chinese fir: Implications for cross-dating and climatic reconstruction in Central East China","authors":"Yesi Zhao ,&nbsp;Bao Yang ,&nbsp;Peng Zhang ,&nbsp;Jiayan Luo ,&nbsp;Jussi Grießinger ,&nbsp;Hongyan Zhang ,&nbsp;Chenghong Liang ,&nbsp;Zaiqin Ma ,&nbsp;Hongliang Gu ,&nbsp;Yizhong Zhang","doi":"10.1016/j.dendro.2023.126134","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126134","url":null,"abstract":"<div><p>The availability of both ancient and modern wood samples enables the Chinese fir (<span><em>Cunninghamia lanceolata</em></span><span>) in Central East China to become a potential tree species for dendroclimatic reconstruction over the Common Era. However, the potential of using tree-ring α-cellulose oxygen isotope ratios (δ</span>¹⁸O_TRC) in Chinese fir for the purposes of cross-dating and climatic reconstruction remains unexplored. Here we presented three δ¹⁸O_TRC chronologies (1954–2006 CE) for the whole-ring (δ¹⁸O_WR<span>), earlywood (δ</span>¹⁸O_EW<span>), and latewood (δ</span>¹⁸O_LW) in Chinese fir. The results indicated that the δ¹⁸O_WR had the highest correlation among individual trees. Using the δ¹⁸O_WR instead of the conventionally employed TRW can facilitate the cross-dating procedure. The δ¹⁸O_WR, δ¹⁸O_EW, and δ¹⁸O_LW exhibited the strongest relationships with the hydroclimate variables during the entire (June–September), early (June–July), and late (August–September) summer, respectively. The climate conditions preceding the growing season had a stronger influence on δ¹⁸O_EW than δ¹⁸O_LW. Using the δ¹⁸O_WR and δ¹⁸O_EW to reconstruct the hydroclimate variations may result in greater bias than the use of δ¹⁸O_LW. Our study demonstrated that the δ¹⁸O_TRC in Chinese fir from Central East China has the potential for cross-dating and summer hydroclimate reconstruction.</p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49751617","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":"Crown defoliation and radial increment among decayed and undecayed Norway spruce trees","authors":"Povilas Žemaitis,&nbsp;Emilis Armoška","doi":"10.1016/j.dendro.2023.126133","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126133","url":null,"abstract":"<div><p><span>Pathogen-caused wood decay is believed to be one of a major cause of decreasing tree vitality and increased susceptibility to external biotic and abiotic damaging agents. Using data collected from twenty decay-affected different maturity Norway spruce (</span><em>Picea abies</em><span> (L.) Karst) stands, this study aims to explore the interaction between butt rot and crown defoliation<span> and radial increment as indicators of tree vitality. Study results indicate that vitality decline among butt rot-affected Norway spruce is expressed as a significant reduction in radial increment and considerably greater levels of crown defoliation. Decayed Norway spruce trees were found to have higher crown defoliation than undecayed spruce trees. Additionally, a radial increment reduction in the last five years and the last twenty years of the increment sequence was found when decayed Norway spruce tree growth was compared to undecayed. Severely defoliated trees were observed only among decayed trees, and this made up only 1% of the population, indicating that butt rot acts as a predisposing or inciting factor for the decline of Norway spruce. A stand age-dependent relationship was also found among visually healthy undecayed spruce trees, indicating that spruce trees show signs of increasing defoliation as part of the ageing process. Among decayed Norway spruce, no such relationship was found, indicating changes in the effect-response framework for decayed trees. Naturally, both decayed and undecayed trees showed a negative correlation between the level of crown defoliation experienced and the radial increment for the last five years before increment sequencing.</span></span></p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49751969","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":"Contribution of Russian dendroanatomical studies to the dendrochronology since the mid-20th century","authors":"Kseniia A. Tabakova ,&nbsp;Alberto Arzac ,&nbsp;Marco Carrer ,&nbsp;Eugene A. Vaganov ,&nbsp;Alexander V. Kirdyanov","doi":"10.1016/j.dendro.2023.126128","DOIUrl":"10.1016/j.dendro.2023.126128","url":null,"abstract":"<div><p>Russia, the country with the most forested area, significantly influences global climate, carbon, and water dynamics. In addition, a considerable part of the Russian forests is in remote regions with a low direct anthropogenic disturbance, but at the same time, recently experiencing unprecedented warming. This combination of factors makes Russia a hotspot for dendrochronological and dendroanatomical studies, providing a valuable perspective on the consequences of climate change in a global context. Dendroanatomy is a powerful dendrochronological tool that provides a robust insight into xylem traits, their relation to climate conditions during tree-rings formation, and the cell structure-function relationship over time (tree life span). Although dendroanatomy in Russia has been gaining momentum lately, there is a long tradition of characterizing and modeling wood anatomical traits, including the development of novel methodologies, hardware and software since the mid-20th century. Unfortunately, in many cases, these advances have been hidden from the international readership because most of them were published in Russian. This descriptive inventory presents an overview of dendroanatomical studies carried out in Russia since the mid-20th century. It focuses on different periods and topics to facilitate its accessibility and highlight its contribution to the global dendrochronological community.</p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46922731","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":"Missing rings of Qilian juniper associated with drought on the Northeastern Tibetan Plateau, China","authors":"Xiaofeng Wang ,&nbsp;Bao Yang ,&nbsp;Liang Jiao ,&nbsp;Miao Song ,&nbsp;Xiang Chen ,&nbsp;Tana Qian","doi":"10.1016/j.dendro.2023.126127","DOIUrl":"10.1016/j.dendro.2023.126127","url":null,"abstract":"<div><p>A missing ring occurs when the radial growth of a tree is disturbed when the plant is under stress (e.g., extreme drought, fire, insect attack, frost) as a result of inhibition of cambial activities. Missing rings have been detected in several tree species in different parts of the world, and this phenomenon may be an indicator of imminent tree death. However, we still lack an in-depth understanding of the characteristics and causes of missing rings and their relationship with tree mortality. In this study, we examined missing ring occurrence in Qilian juniper (<em>Juniperus przewalskii</em><span> Kom.), one of the most long-lived tree species in China, growing in an extremely harsh environment on the Northeastern Tibetan Plateau. The results showed that the missing ring rate was sensitive to drought events during the period 1500–2000 AD, with extreme values of missing ring rate occurring in certain drought years, such as 1665, 1687, 1715, 1824, 1918, etc. In addition, climate warming in recent decades did not lead to an increase in the missing ring rate of Qilian juniper, which may be related to the improving regional water conditions on the plateau. The missing ring rate of Qilian juniper was related to the age of the tree, i.e., it increased first in younger trees and then decreased, with the highest missing ring rate occurring in trees about 800-years-old. Furthermore, trees that eventually died had a higher rate of missing rings before their death than those that survived, suggesting that missing rings have the potential to predict tree mortality. However, the relationship between tree mortality and missing ring rate is a very complex issue and requires further study.</span></p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46028506","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":"Dendroanatomy of xylem hydraulics in two pine species: Efficiency prevails on safety for basal area growth in drought-prone conditions","authors":"Emanuele Ziaco ,&nbsp;Xinsheng Liu ,&nbsp;Franco Biondi","doi":"10.1016/j.dendro.2023.126116","DOIUrl":"10.1016/j.dendro.2023.126116","url":null,"abstract":"<div><p><span>Xylem structure optimizes water conductivity while preventing hydraulic failure via embolism resistance, but how this process is modulated by climate variability<span> and how it affects secondary growth in mature trees is still not fully understood, particularly in water-limited environments. Using quantitative wood anatomy techniques, we estimated xylem anatomical proxies for hydraulic efficiency (xylem specific conductivity, </span></span><em>Ks</em>) and safety (cell wall reinforcement, <em>wrein</em>) in two western US conifers, <span><em>Pinus flexilis</em></span> and <span><em>Pinus longaeva</em></span>, at a montane and subalpine location respectively. We built two large datasets (570 rings for <em>P. flexilis</em>, 635 rings for <em>P. longaeva</em><span>) to investigate 1) the variability of anatomical parameters (i.e lumen diameter, cell wall thickness) and hydraulic proxies along the stem in the five outermost rings (2009–2013); 2) the response of hydraulic proxies to daily climate over a period of 24 years (1990–2013); and 3) the relationship between xylem hydraulic architecture and basal area increment (BAI). Lumen diameter scaled along the stem following a power function, but the scaling patterns of cell wall thickness and hydraulic proxies differed significantly between species. From 1990–2013, </span><em>Ks</em> decreased in both species, whereas <em>wrein</em> increased only in <em>P. longaeva</em>, while no trends were observed in BAI. Climate sensitivity of <em>Ks</em> peaked over a longer period (84–102 days) compared to <em>wrein</em> (20–55 days), responding to increasing minimum temperature. In both species, <em>Ks</em> was a better predictor of BAI than <em>wrein</em>, indicating that, even under severely water-limited conditions, radial growth is linked to hydraulic efficiency rather than safety. Based on the variability of cell density along the stem, the trade-off between hydraulic efficiency and safety in <em>P. longaeva</em> appeared to be controlled by a strategy of space occupation. Characterizing the mechanistic relationship between xylem anatomy, plant hydraulic functioning, and stem growth is necessary to better understand climate-growth relationships in the western US and species’ growth plasticity under future climate change scenarios.</p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46889016","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":"Dendrochemical indicators of tree rings reveal historical soil acidification in Swiss forest stands","authors":"Sven-Eric Hopf ,&nbsp;Simon Tresch ,&nbsp;Salim Belyazid ,&nbsp;Harald Sverdrup ,&nbsp;Sabine Augustin ,&nbsp;Daniel Kurz ,&nbsp;Beat Rihm ,&nbsp;Sabine Braun","doi":"10.1016/j.dendro.2023.126099","DOIUrl":"10.1016/j.dendro.2023.126099","url":null,"abstract":"<div><p><span><span><span>The deposition of acidifying nitrogen and sulphur compounds from </span>agriculture<span><span> and fossil fuel combustion has drastically altered the chemical balance of </span>forest soils<span> in many regions of the world, leading to soil acidification with negative impacts on nutrient availability and thus also on tree vitality. The change of nutrient concentrations in the soil solution can be assessed by long-term investigations, however meaningful indicators, reflecting environmental changes, are needed to compare the current nutrient status with past values. We used dendrochemical indicators in stem wood of different tree species to access the impact of acidifying depositions on soil quality and </span></span></span>tree nutrition<span>. We selected 328 stem wood samples from 96 trees of Norway spruce (</span></span><em>Picea abies</em>), European beech (<span><em>Fagus sylvatica</em></span><span>), Sessile oak (</span><span><em>Quercus </em><em>petrea</em></span><span>) and English oak (</span><em>Quercus robur</em><span><span>) from 22 forest sites, which are part of the long-term Intercantonal Forest Observation Program in Switzerland. Four time periods of 20 years were defined according to the emissions of air pollutants<span> between 1910 and 2017. Our results showed a trend of increasing Al concentrations in tree rings of spruce peaking in the most recent time period (2000–2017). Mn and Ca concentrations in spruce and beech wood have decreased significantly throughout the time period 1910–2017. These dendrochemical indicators depended on the soil pH, with higher Al and lower Mn and Ca concentrations for soils with a low pH (pH&lt;4.2). In oak trees the observed dendrochemical changes are confounded with dendrochemical differences between heartwood<span> and sapwood<span>. K and Mg showed inconsistent patterns in all three tree species, which are probably caused by translocation within the stem discs. With the use of piecewise structural equation models (SEM) we highlighted the direct and indirect influences of N deposition on element concentrations in stem wood. The data suggest a relation between increased N deposition and lower base saturation values in the forest soils for all three tree species, which were linked to higher Al concentrations in spruce and lower Mn concentrations in spruce and beech. The relation between Al concentrations in tree rings of Norway spruce and measured base saturation was used to reconstruct past soil base saturation values. It revealed a progressive soil acidification in the long-term forest observation sites. These reconstructed base saturation values were further used to validate modelled values from dynamic biogeochemical models such as SAFE/ForSAFE. This comparison pointed out possible shortcomings such as the lack of organic complexation in those models. Taken together, our analyses showed that element concentrations of Al, Mn, Ca in Norway spruce and European beech ste","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47909911","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}