Dendrochronologia最新文献

{"title":"Aspects of different growth responses of coniferous and broadleaved tree species in landslide research","authors":"Karel Šilhán","doi":"10.1016/j.dendro.2025.126368","DOIUrl":"10.1016/j.dendro.2025.126368","url":null,"abstract":"<div><div>This study investigates the differing responses of two tree species, <em>P. abies</em> and <em>F. sylvatica</em>, to landslide movements and their subsequent effects on landslide chronologies. These are the two most commonly used tree species in dendrogeomorphic landslide research in Central Europe and their combination is generally recommended. However, their specific effect on the resulting chronology is not yet taken into account although they are two quite different species. The research was conducted on 220 individuals of both species located in the Girová landslide area (Outer Western Carpathians), with a focus on the catastrophic event of May 2010. The study sought to understand how these species contribute to dendrogeomorphic reconstructions of landslide events, particularly by analyzing their growth responses and the frequency of growth disturbances (GDs) such as compression and tension wood. The results revealed significant differences in how <em>P. abies</em> and <em>F. sylvatica</em> responded to landslide activity. <em>P. abies</em> showed a higher frequency of GDs (compression wood), but exhibited greater inertia in its physiological response, potentially masking high-frequency landslide events. In contrast, <em>F. sylvatica</em> produced fewer GDs (tension wood), yet its response to landslides was more immediate and efficient, with 100 % intensity in tension wood formation, which helped create a minimum-noise chronology despite fewer identified events. The study highlights the advantages and limitations of both species in dendrogeomorphic research. While <em>P. abies</em> contributes more frequently to detecting landslide events, the inertia in compression wood formation can complicate the interpretation of rapid landslide movements. On the other hand, <em>F. sylvatica</em>, though less responsive in terms of GDs, provides a clearer and more precise landslide chronology. Future research should explore the physiological factors behind these species' different responses to enhance the accuracy of dendrogeomorphic reconstructions.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126368"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138633","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":"Differential responses of pinaceae and cupressaceae tree radial growth to drought in Central Asia","authors":"Peng Zhang ,&nbsp;Liang Jiao ,&nbsp;Ruhong Xue ,&nbsp;Xuge Wang ,&nbsp;Qian Li ,&nbsp;Zhengdong Guo ,&nbsp;Le Zhang ,&nbsp;Yarong Qin","doi":"10.1016/j.dendro.2025.126350","DOIUrl":"10.1016/j.dendro.2025.126350","url":null,"abstract":"<div><div>Global climate change is increasing the intensity and frequency of compound hot-drought events, with many negative impacts on forest ecosystems. The dynamics of tree growth recovery after compound hot-drought events and the factors influencing it are unclear. Therefore, we collected data on a total of 101 tree ring widths of eight tree species in Central Asia, which were categorized into two main groups, Pinaceae and Cupressaceae. We first quantified tree growth loss during drought and growth recovery after drought, and then linear mixed models assessed factors affecting tree growth recovery. The results showed that after a compound hot-drought event, Pinaceae radial growth declined more and took longer to recover, while Cupressaceae radial growth declined less and recovered quickly. There was a significant downward trend in growth loss during drought as tree pre-drought growth levels increased. Tree growth recovery tended to increase as both pre-drought growth levels and post-drought wetness increased, and higher pre-drought growth levels were required for Pinaceae to return to normal growth levels after a compound hot-drought event. Linear mixed modeling results showed greater contribution of pre-drought growth levels and growth loss to growth recovery. Thus, Cupressaceae was able to better adapt to compound heat-drought events, while higher pre-drought growth levels and post-drought wetness were key to increased growth recovery.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126350"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116809","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":"Variation in radial growth sensitivity to drought among genetic groups of common yew (Taxus baccata L.) in central Italy","authors":"Enrico Tonelli ,&nbsp;Camilla Avanzi ,&nbsp;Elena Bitocchi ,&nbsp;Alessandro Vitali ,&nbsp;Andrea Piotti ,&nbsp;Ilaria Spanu ,&nbsp;Elena Barocci ,&nbsp;Carlo Urbinati","doi":"10.1016/j.dendro.2025.126360","DOIUrl":"10.1016/j.dendro.2025.126360","url":null,"abstract":"<div><div>Common yew (<em>Taxus baccata</em> L.) is a long-living European species, with significant ecological importance. Climate change and severe droughts threaten its growth, emphasizing the need for preserving genetic diversity. By combining dendroecology and genetics, we aimed to identify groups of trees most resilient to changing climatic conditions. We analysed radial growth trends from 1951 to 2018 in three populations located in two mountain areas of central Italy with different rainfall regimes. From 298 selected yew trees, needles were collected for DNA extraction, and tree-ring cores were obtained for dendrochronological analysis. We assessed the relationship between tree growth and drought using the Standardized Precipitation Evapotranspiration Index (SPEI). The studied populations clustered in two distinct genetic groups, corresponding to the driest and wettest areas. At the rainiest site, in the period 1951–2018 yew growth was less constrained by evapotranspiration rates than at the driest area, but climate-growth analysis on moving windows indicates an increasing impact of drought. Growth recovery time after the 2003 drought was longer in individuals at the rainiest area compared to the more xeric sites. The yew trees of the driest area, which were further subdivided in two genetically distinct but spatially intermingled sub-groups, appeared to be better adapted to drought events and therefore more suitable for future warmer scenarios. This study highlights the climate sensitivity of common yew, showing that summer droughts can limit growth, and suggests the advantages of using a dendrogenetic approach to delve deeper into ecophysiological responses to be exploited for reforestation and conservation efforts.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126360"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117028","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":"Stable carbon and oxygen isotope ratios in Norway spruce (Picea abies (L.) Karst.) tree rings along an elevation gradient in the Rarau Mts. (Romania)","authors":"Daniela Maria Llanos-Campana ,&nbsp;Zoltan Kern ,&nbsp;Ionel Popa ,&nbsp;Aurel Perşoiu","doi":"10.1016/j.dendro.2025.126365","DOIUrl":"10.1016/j.dendro.2025.126365","url":null,"abstract":"<div><div>This study investigates the variations of <em>δ</em>¹³C and <em>δ</em>¹⁸O isotopes in alpha-cellulose extracted from Norway spruce (<em>Picea abies</em> (L.) Karst.) across an altitudinal gradient in the Eastern Carpathians. Results reveal mean <em>δ</em>¹⁸O values decrease with elevation aligning with the altitude effect and indicating influences from source water composition, precipitation dynamics, and evaporative enrichment. In contrast, mean <em>δ</em>¹³C values do not exhibit consistent altitudinal trends, highlighting the impact of local environmental factors like water stress and light exposure. In addition, the isotopic composition was correlated with environmental variables such as temperature (maximum and minimum) and precipitation to explore physiological responses of Norway spruce to climate conditions. The correlation between <em>δ</em>¹⁸O values and summer precipitation is weakening, while growing season temperature signal is strengthening towards higher elevations suggesting that the role of available water is diminishing, and ambient temperature is enhancing as approaching the timberline. A weakening trend was found for the negative correlation between <em>δ</em>¹³C values and summer precipitation. The correlation between <em>δ</em>¹³C values and precipitation (negative) and temperature (positive) in the growing period for the low elevation stand points to strong drought stress explained by changes in stomatal conductance during dry and warm conditions. The faint negative correlation with temperature for higher stands can be an indirect response to other direct controlling factors, such as relative humidity which is inversely related to temperature.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126365"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169804","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":"Tracheid anatomy of Cryptomeria japonica grown in a humid temperate region: A proxy for short-term climate variability and a crossdating index","authors":"Takeshi Nakajima ,&nbsp;Yusuke Kita ,&nbsp;Junji Sugiyama","doi":"10.1016/j.dendro.2025.126363","DOIUrl":"10.1016/j.dendro.2025.126363","url":null,"abstract":"<div><div>The tree and site selection principle established for dendrochronology and its subfields has long been used as a standard reference for maximizing the climatic signal recorded in ring widths. However, this principle suffers from its stringent restrictions on available tree species and age, and a minimum number of ring widths. Additionally, a limitation of using ring widths is that it fails to capture the detailed responses to signals from short-term climatic variability preserved in wood chemistry and cellular anatomy. Recently, stable isotope and quantitative wood anatomy have shed light on these perspectives, enabling the extraction of climatic signals even from specimens that were previously considered unsuitable. This study aims to evaluate the potential of quantitative tracheid anatomy in <em>Cryptomeria japonica</em> trees of approximately 70 years of age from a humid-temperate region, Ashiu Forest Research Station, as a proxy for climate signals and a crossdating index, despite being suboptimal under conventional dendrochronological principles. Specifically, lumen radial diameter and cell wall thickness were analyzed for the period between 1965 and 2016. According to a correlation analysis, daily precipitation in July (rainy season) of the current year was highly correlated with the lumen radial diameter (<em>r</em> = 0.71). The lumen radial diameter was also useful for reliably crossdating (Student’s <em>t</em>-value = 7.34) <em>C. japonica</em> specimens from 1965–2016 that could not be crossdated by ring widths. The study findings suggest the possibility that tracheid anatomy of <em>C. japonica</em> may serve as a proxy for climatic variability and a crossdating index in humid-temperate regions.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126363"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climate change alters the radial growth responses of P. schrenkiana and J. jarkendensis to climate extremes in the Eastern Pamirs","authors":"Tiane Yang ,&nbsp;Yonghui Wang ,&nbsp;Tongwen Zhang ,&nbsp;Dong Pan ,&nbsp;Kexiang Liu ,&nbsp;Huaming Shang ,&nbsp;Abula Arman ,&nbsp;Li Qin ,&nbsp;Ruibo Zhang","doi":"10.1016/j.dendro.2025.126362","DOIUrl":"10.1016/j.dendro.2025.126362","url":null,"abstract":"<div><div>As global temperatures rise, extreme climate events are becoming more intense, frequent, and prolonged, profoundly altering forest ecosystems, particularly in arid and semi-arid regions. This study employs dendrochronological methods to examine the relationship between the radial growth of <em>Picea schrenkiana (P. schrenkiana)</em> and <em>Juniperus jarkendensis (J. jarkendensis)</em> and extreme climate events in the Eastern Pamirs. The findings reveal that: <em>P. schrenkiana</em> is more sensitive to extreme temperatures fluctuations, whereas <em>J. jarkendensis</em> exhibits a stronger response to extreme precipitation. In the context of global warming, <em>P. schrenkiana</em> and <em>J. jarkendensis</em> exhibit a gradual trend of shifting from negative to positive responses to mean temperature (T) and extreme minimum temperature (TNn). Following climatic abruptions, both species display significant positive correlations with T and TNn, reflecting their adaptive adjustments to a warming climate and indicating their ability to leverage more favorable temperature conditions to promote growth. These results suggest that global warming has significantly altered the growth dynamics of these tree species. The interaction of multiple climate factors, rather than a single variable, drives tree growth. Consequently, targeted management and conservation strategies are essential to mitigate the impacts of extreme climate events on different tree species.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126362"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tree rings indicate hazards related to a waterside landslide in the Northern Apennines, Italy – A preliminary step towards forecasting landslides and related tsunami","authors":"Ireneusz Malik ,&nbsp;Michael Maerker ,&nbsp;Małgorzata Wistuba ,&nbsp;Elżbieta Gorczyca ,&nbsp;Patrizio Torrese ,&nbsp;Manuel La Licata ,&nbsp;Yang Yu ,&nbsp;Beata Woskowicz-Ślęzak ,&nbsp;Anna Bieniasz","doi":"10.1016/j.dendro.2025.126379","DOIUrl":"10.1016/j.dendro.2025.126379","url":null,"abstract":"<div><div>We analysed landslide activity on a slope above the Lago di Trebecco reservoir (Northern Apennines, Italy) and indicated a hazard of future destructive landslide reactivation. We used dendrochronology in a variant of eccentric growth analysis to indicate the hazard of sudden slope failure, which could reach the water reservoir and form a tsunami. We use the previous pattern of eccentric growth of trees, found in the case of two landslides reactivated in a landslide catastrophe in Poland in 2010. Before the disaster, trees formed a specific eccentric growth pattern which preceded and can predict landslide catastrophe (sudden slope failure). This pattern was compared to trees growing on the Lago di Trebecco landslide to estimate the hazard of future destructive landslide occurrence. Trees sampled on the landslide above the Lago di Trebecco have recorded a gradual increase in activity over the last few decades. This means the landslide has become increasingly active. On the other hand, in the last two years, a significant decrease in landslide activity has been recorded on the Lago di Trebecco landslide; activity of landslides located in Poland increased significantly two years before the landslide catastrophe in 2010. This means no dendrochronological records indicate that the Lago di Trebecco landslide will be triggered in a short time, but the landslide should be monitored because of the increasing activity over the past decades. Dendrochronology can be a useful indicator for the hazard of a landslide catastrophe (sudden slope failure), which can enter lakes and induce tsunamis.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126379"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479959","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":"Atmospheric mercury pollution recorded in conifer tree rings: Disentangling the effects of tree-ring width, water content, and climate on mercury concentrations","authors":"Katrien Boonen ,&nbsp;Rohan Shetti ,&nbsp;Tomáš Navrátil ,&nbsp;Tereza Nováková ,&nbsp;Jan Rohovec ,&nbsp;Jiří Lehejček","doi":"10.1016/j.dendro.2025.126370","DOIUrl":"10.1016/j.dendro.2025.126370","url":null,"abstract":"<div><div>Mercury (Hg) is a contaminant of major concern for public and ecosystem health, known for its toxicity and bioaccumulation in the environment. Reconstructing past Hg pollution, as well as monitoring current Hg concentrations, is therefore essential. Tree rings offer a valuable archive for reconstructing historical atmospheric Hg pollution, yet the reliability of dendrochemical Hg reconstructions depends on understanding all factors that influence Hg accumulation in the xylem. This study investigated whether factors beyond atmospheric Hg concentrations, i.e., climatic variables (temperature and precipitation), tree-ring width, and water content, influenced Hg concentrations in the tree rings of European larch and Douglas fir growing near a chlor-alkali plant in the Czech city of Ústí nad Labem. Both tree species showed similar long-term trends in Hg concentrations, broadly reflecting historical trends in atmospheric Hg pollution. However, short-term (high-frequency) variability in tree-ring Hg concentrations remaining after detrending was associated with other factors. A positive correlation between water content and Hg concentrations suggested that a fraction of the Hg was retained in xylem sap. In European larch heartwood, Hg concentrations correlated positively with tree-ring width, likely due to heartwood formation processes. In Douglas fir, a positive correlation between August-September precipitation and tree-ring Hg suggested that this tree species’ isohydric behaviour affected Hg uptake. These findings indicated that while tree-ring Hg concentrations can serve as proxies for historical atmospheric Hg pollution, other factors, such as tree-ring width, water content, and late-summer precipitation, may modulate the signal and should be considered in dendrochemical Hg reconstructions.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126370"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169805","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":"X-ray micro-CT pipeline for large-scale tree-ring densitometry studies","authors":"Louis Verschuren ,&nbsp;Vladimir Matskovsky ,&nbsp;Matthieu N. Boone ,&nbsp;Luc Van Hoorebeke ,&nbsp;Joris Van Acker ,&nbsp;Tom De Mil ,&nbsp;Valerie Trouet ,&nbsp;Charlotte Pearson ,&nbsp;Jorden De Bolle ,&nbsp;Toon Gheyle ,&nbsp;Jan Van den Bulcke","doi":"10.1016/j.dendro.2025.126343","DOIUrl":"10.1016/j.dendro.2025.126343","url":null,"abstract":"<div><div>Tree-ring data provides essential insights into historical climate conditions and current ecosystem dynamics. Wood density measurements complement traditional tree-ring width series by extracting additional climatic information embedded within tree rings, with maximum latewood density serving as the gold standard for summer temperature reconstructions. However, the labor-intensive wood sample preparation required by conventional techniques is one of the main factors limiting the more widespread use of tree-ring densitometry. X-ray micro-computed tomography (X<em>μ</em>CT) offers a novel, non-destructive, 3D densitometry technique that enables the simultaneous study of tree-ring width and wood density at high resolution and with minimal sample preparation. Despite its potential, the lack of a streamlined and time-efficient X<em>μ</em>CT workflow has hindered its broader application in the past. Here we present a highly optimized X<em>μ</em>CT pipeline aimed at large-scale tree-ring densitometry studies, capable of processing large amounts of increment cores with a low demand for human labor time (2.2–5.4 min per 35 cm sample length). Key parts include large and efficient sample holders (16–48 samples per scan), optimized and standardized scan settings (helical X<em>μ</em>CT at 15, 30, and 60 <em>μ</em>m voxel size), and three custom software packages (facilitating scan processing, ring indication, and cross-dating). Overall, this X<em>μ</em>CT toolchain represents a significant leap forward in high-resolution tree-ring densitometry, enabling large-scale studies with a wide spatial extent, high replication, and/or long temporal range.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126343"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923490","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":"Wood formation mechanisms of Cedrela fissilis Vell. in extreme years: Climatic, anatomical and chemical predictors","authors":"Daigard Ricardo Ortega-Rodriguez ,&nbsp;Andrea Hevia ,&nbsp;Gabriela Morais Olmedo ,&nbsp;Bruna Hornink ,&nbsp;Fidel A. Roig ,&nbsp;Mario Tomazello-Filho ,&nbsp;Raúl Sánchez-Salguero ,&nbsp;Luiz Santini ,&nbsp;Laura Yáñez-Espinosa","doi":"10.1016/j.dendro.2025.126380","DOIUrl":"10.1016/j.dendro.2025.126380","url":null,"abstract":"<div><div>Extreme climatic events in the Amazon region open questions about how the interactions between exogenous and endogenous variables occur in the wood formation of widely distributed tree species such as <em>Cedrela fissilis</em> Vell. In this study, eleven mature-phase trees from a <em>C. fissilis</em> population growing on a non-flooded forest in the southern Amazon basin were selected to determine the interaction between climatic (precipitation, temperature, and moisture indicators: precipitation minus potential evapotranspiration - P-PET and standardized precipitation evapotranspiration index - SPEI), chemical (xylem concentrations of Al, P, S, Ca, K, Mn, Fe, Sr and their meaningful molar ratios) and anatomical (proportion of vessels – PV, fibres – PF, and parenchyma – PP) predictors to explain the variability of ring width (RW) and wood densities (average – RD, minimum – MND, and maximum – MXD). Decision tree regression was applied for understand this interaction in three datasets, values of narrow or less dense, complacent, and wide or dense rings. Narrow or wider rings vary manly associated to hydraulic tissues (PV) and SPEI. Less dense and complacent (in density values) rings vary manly associated to structural tissues (PF) and elements involved in soil-root interactions (Al) and resistance to water stress (Ca/Mn). Less dense MND vary associated to storage and transportation tissues (PP) and elements involved in soil-root interactions (Al and Mn), whereas dense MXD vary associated to structural (PF) and hydraulic (PV) tissues, precipitation and elements related to cambial activity (Ca and K/Ca). In the context of an increase in the frequency and intensity of droughts in the region, the formation of narrower and less dense rings in <em>C. fissilis</em> is expected. In this sense, our results suggest that higher values, which ensure the functionality of these variables under these extreme conditions, are associated with a higher proportion of structural tissues to the detriment of hydraulic ones, in addition to higher K, Mn, and Al storage in the xylem, which mediate cambial activity based on cell expansion, reduced vulnerability to water stress, and healthier root system conditions, respectively. Altogether, this study offers clues to understand variables combination associated with wood formation in the face of extreme water-availability stress that can lead hydraulic failure, carbon starvation, increasing vulnerability, and even specie´s dieback.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"92 ","pages":"Article 126380"},"PeriodicalIF":2.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563699","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}