Dendrochronologia最新文献

{"title":"CTRing: An R package to extract wood density profiles from computed tomography images of discs and logs","authors":"Dipak Mahatara ,&nbsp;Filipe Campelo ,&nbsp;Laurent Houle ,&nbsp;Alain Caron ,&nbsp;Julie Barrette ,&nbsp;Pierre Francus ,&nbsp;Robert Schneider","doi":"10.1016/j.dendro.2024.126274","DOIUrl":"10.1016/j.dendro.2024.126274","url":null,"abstract":"<div><div>Accurately determining the position of pith and accessing tree-ring density profiles, including intra-ring variations, is important for both the forest industry and dendroclimatology. Although several available methods exist for acquiring this information, such as X-ray computed tomography (CT), micro-CT, and X-ray films, the availability of open-source programs for extracting data remains limited. The CTRing package in the R environment integrates a series of functions to detect precisely the pith and tree-ring boundaries and generate tree-ring density profiles using CT images of tree cross sections. Before processing, grey values are transformed into density using a calibration function. Pith position is then detected by combining an adapted Hough Transform method and a one-dimensional edge detector. Tree-ring profiles along the pith-to-bark path of interest are inspected visually, and tree-ring boundaries can be easily added or removed manually via a graphical user interface. After correcting for tree-ring boundaries, the inflection points of a 3rd-degree polynomial obtained from density profiles are used to delimit the earlywood–latewood transition. We tested this package using 60 CT-scanned images of white spruce (<em>Picea glauca</em> (Moench) Voss) discs collected at various tree heights (0 %, 25 %, 50 % and 75 % of the total tree height as well as at 1.3 m). The pith detection function had an average mean error of 0.72 mm with 95 % of the automatically detected pith locations that differed by less than 2 mm from their manually located positions. Error decreased toward the apex of the tree. The functions of the CTRing package are flexible and can be easily implemented or adapted. The package could also be used with simple images of discs to obtain ring-width time series; however, this use must be evaluated further. Future work with this package involves assessing the use of low-quality images and ring-porous species.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126274"},"PeriodicalIF":2.7,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A critical source of noise in tree-ring based chronologies of landslide movements","authors":"Karel Šilhán","doi":"10.1016/j.dendro.2024.126273","DOIUrl":"10.1016/j.dendro.2024.126273","url":null,"abstract":"<div><div>Tree-ring based analysis is currently a widely used tool for obtaining data on the spatio-temporal behaviour of past landslides, which is key information for determining hazard or estimating potential triggers. However, even this approach has its limitations, which may induce a lot of noise in the obtained results. In doing so, the sources of this noise, which in some cases can even simulate a spurious landslide event, are not well known. Thus, this study highlights one of the possible significant sources of noise in tree-ring based landslide chronologies, which is the effect of wind combined with the soft landslide surface, which causes instability of trees that can easily lean to simulate a landslide movement. For this purpose, 197 individuals of common spruce (<em>Picea abies</em> (L.) Karst.) on the flat parts of two flow-like landslides were analyzed. 280 growth disturbances were identified and 17 events were reconstructed. In order to assess the landslide origin of the collected data, this study included analyses of the nature and relative contribution of different types of growth disturbances, their spatial distribution, analyses of the direction and magnitude of tree trunk leaning, as well as analyses of extreme precipitation and wind events. By combining the results obtained, it can be concluded that most of the detected growth disturbances and reconstructed events were induced by wind in combination with the soft landslide surface into which the trees sink. Since these growth disturbances cannot be filtered out by standard reference trees, they are an extremely serious source of noise that can completely invalidate the dendrogeomorphic results of the study. The study thus identifies which parameters should be newly considered in dendrogeomorphic analyses of landslide movements.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126273"},"PeriodicalIF":2.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655374","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":"Stand structure and disturbance history of old-growth blue pine (Pinus wallichiana) forests in the Bhutan Himalaya","authors":"Karma Tenzin ,&nbsp;Craig R. Nitschke ,&nbsp;Kathryn J. Allen ,&nbsp;Benjamin Wagner ,&nbsp;Thiet V. Nguyen ,&nbsp;Patrick J. Baker","doi":"10.1016/j.dendro.2024.126272","DOIUrl":"10.1016/j.dendro.2024.126272","url":null,"abstract":"<div><div>Blue pine (<em>Pinus wallichiana</em>) forests are of significant ecological, economic, and cultural importance in the Himalayas. We used dendrochronological methods to investigate the role of natural and human disturbance in shaping the development of these forests. Analyses of the age structure and growth patterns of blue pine populations over the period 1760–2020 at two different sites in central Bhutan revealed that blue pine tends to establish as single-cohort stands following relatively intense disturbances and as multi-cohort stands after low-to-moderate severity disturbances. Shifting cultivation, which was common across the region, likely led to the establishment of single-cohort stands, particularly near human settlements, whereas natural disturbances are likely responsible for the development of multi-cohort stands. Tree-ring records revealed an acute change in recruitment patterns in the early 1970s associated with the 1969 Forest Act of Bhutan, which limited traditional practices, such as firewood collection and grazing, within the forests. This led to a sudden and sustained increase in the recruitment of broadleaf tree species and effectively curtailed blue pine regeneration over the past half century due to thick understory and midstory vegetation reducing the amount of light reaching the forest floor. These results highlight the role of disturbances, both human and natural, in driving forest stand dynamics in Himalayan forests and how forest policy and traditional practices can alter those dynamics.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126272"},"PeriodicalIF":2.7,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the potential for a 9000-year tree-ring chronology consisting of subfossil oak material from southern Scandinavia","authors":"Johannes Edvardsson ,&nbsp;Kjeld Christensen ,&nbsp;Jonas Ogdal Jensen ,&nbsp;Hans Linderson ,&nbsp;Claudia Baittinger","doi":"10.1016/j.dendro.2024.126268","DOIUrl":"10.1016/j.dendro.2024.126268","url":null,"abstract":"<div><div>In this study, we present the initial results from a long-term initiative to develop a multi-millennial tree-ring width (TRW) chronology for subfossil oak (<em>Quercus</em> spp.) trees in South Scandinavia. We have constructed 40 TRW chronologies, primarily from oak trunks extracted from peatlands, archaeological sites, drainage ditches, and infrastructure projects, as well as some submerged material. The trees included in these chronologies have been dendrochronologically dated and/or dated by radiocarbon, showing a temporal spread from 6911 ± 246 BCE to 1117 CE. Significant assemblages of trees are found during the periods 6000–4500 BCE, 3500–2600 BCE, 1750–1200 BCE, 900–400 BCE, and 200 BCE–500 CE, with intervening periods exhibiting low sample replication or gaps. The paleoclimatic information extracted from TRW and replication data may vary based on the substrate in which the trees were rooted, geographical locations, and the prevailing climate conditions during their growth. Nevertheless, extending the oak TRW chronologies is crucial because (1) no such long and annually resolved climate records from southern Scandinavia exist, (2) there is a widespread lack of detailed paleoclimatic proxies spanning multi-millennial periods, and (3) it will provide an essential dating tool for wooden archaeological artifacts. This study is the first in a series aimed at refining paleoclimatic and ecological reconstructions in southern Scandinavia. It demonstrates the potential to develop South Scandinavian TRW chronologies covering the last 9000 years, filling a geographical gap in an ecologically sensitive region.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126268"},"PeriodicalIF":2.7,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Salinity regulates radial growth of Cynometra ramiflora L. in the Sundarbans mangrove ecosystem","authors":"Md. Qumruzzaman Chowdhury ,&nbsp;Swapan Kumar Sarker ,&nbsp;Shahadat Hossain,&nbsp;Md. Imam Hossain Imran,&nbsp;Anup Datta","doi":"10.1016/j.dendro.2024.126270","DOIUrl":"10.1016/j.dendro.2024.126270","url":null,"abstract":"<div><div>The mangrove biome is threatened by global environmental changes (including sea level rise, SLR) and anthropogenic disturbances. In this context, understanding the growth dynamics of mangrove species is essential for designing effective management plans for critical mangrove ecosystems such as the Bangladesh Sundarbans. Therefore, this study aims to (1) identify the growth-ring boundaries and tested their periodicity (annual nature) in one of the ecologically important understory mangrove species, <em>Cynometra ramiflora</em> in the Bangladesh Sundarbans, (2) determine the influences of climate and river discharge on radial growth, and (3) examine the influence of habitat variables (e.g., regulators, resources and forest structure) on radial growth. The growth-ring boundaries of <em>C. ramiflora</em> were distinct on the polished wood discs and marked by a layer of flattened fibers mixed with parenchyma. The agreement between individual growth-ring series and chronology statistics enabled us to develop for the first time a 42-year-long chronology spanning from 1979 to 2021. The results indicate that growth rings are annual and could be used for age and growth rate estimations. Monsoonal and annual precipitation enhanced radial growth. Growth was also positively influenced by the amount of river discharge received prior to the onset of growth, particularly during the pre-monsoon. Generalized additive models (GAMs) revealed that among the habitat variables, salinity had a strong negative influence on radial growth of the studied species in the Sundarbans, while tree density and diameter heterogeneity (coefficient of variation, CoV of diameter at breast height) had positive influences. This study revealed that <em>C. ramiflora</em> growth is strongly dependent on soil salinity and highlighted the potential of this approach for improving the prediction of future tree growth and distribution in the face of projected global changes, in particular, SLR.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126270"},"PeriodicalIF":2.7,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424865","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":"Changes in the radial growth patterns of two dominant tree species in north-central China under climate warming","authors":"Jiachuan Wang ,&nbsp;Shuheng Li ,&nbsp;Yili Guo ,&nbsp;Yijie Han ,&nbsp;Qi Liu ,&nbsp;Yiqi Zhao ,&nbsp;Qiang Li","doi":"10.1016/j.dendro.2024.126269","DOIUrl":"10.1016/j.dendro.2024.126269","url":null,"abstract":"<div><div>The radial growth pattern of alpine coniferous trees in the mid-high latitudes of the Northern Hemisphere has an unstable and inconsistent response to climate warming. Understanding the growth trends of trees in the past and future is crucial for forest cultivation against the background of climate change. Thus, we used traditional dendroclimatological methods to analyze the radial growth patterns and stability in response to climate change of the two dominant species on Guancen Mountain and concluded that: (1) the radial growth of <em>Larix principis-rupprechtii</em> was more sensitive than that of <em>Picea meyeri</em> to climatic factors; (2) before and after the abrupt temperature change, the major controlling climatic factors for the radial growth of the two dominant species were spring precipitation and mean temperature, respectively; (3) before the abrupt temperature change, the radial growth of <em>L. principis-rupprechtii</em> was affected by the mean temperature in autumn, while that of <em>P. meyeri</em> was restricted by the standardized precipitation evapotranspiration index in spring; after the abrupt temperature change, the major controlling climate factors of <em>L. principis-rupprechtii</em> and <em>P. meyeri</em> were winter drought and the combination of water and heat in summer, respectively; and (4) after the abrupt temperature change, the interannual basal area increments of the two species followed an upward trend, however, the radial growth rate of both species decreased after detrending, and the growth and development of both species were seriously stressed by drought. Under the background of climate warming, to explore the coping situation of different tree species in the same habitat, to provide theoretical and mechanism support for the future cultivation of forests according to local conditions, and to provide suggestions for the \"greening\" problem fundamentally.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126269"},"PeriodicalIF":2.7,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424922","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-ring anomalies as time markers for ice-core chronologies, with special reference to 5281 BCE as the possible date of the Kikai volcanic event","authors":"Varvara A. Bessonova ,&nbsp;Ludmila A. Gorlanova ,&nbsp;Rashit M. Hantemirov","doi":"10.1016/j.dendro.2024.126271","DOIUrl":"10.1016/j.dendro.2024.126271","url":null,"abstract":"<div><div>The synchronization of Greenland and Antarctica ice core data with tree-ring data, other proxies, and direct observations of natural processes and events is important to understand past climatic variation and environmental change. One of the methods that is used to correct the dating of ice layers is to match volcanic eruption footprints in ice cores with tree rings, manifested as sulphate spikes and anomalous rings, respectively. In this study, we inventoried the occurrence of tree-ring anatomical anomalies and extremes in ring width during three 200-year periods. These periods included three of the eight largest Holocene volcanic eruptions, each with a Volcanic Explosivity Index (VEI) of 7. The initial period spanned from 6560 to 6360 BCE and included the eruption of Ilyinsky Volcano in Kamchatka. The second period was from 5780 to 5580 BCE, during which Mount Mazama Volcano in North America erupted. The third period was from 5380 to 5180 BCE when the Kikai Volcano in the Japanese Islands erupted. Throughout the first two periods, no substantial tree-ring anomalies were observed suggesting the absence of any significant climate consequences of a major volcanic eruption. However, in the 5380–5180 BCE period, a clear sharp decline in tree growth and an exceptionally high frequency of tree-ring anomalies were identified in 5281 BCE and the subsequent 5 years. We propose that the exceptionally narrow light rings in these 6 years are indicative of the climatic impact resulting from the Kikai volcanic eruption. We suggest utilising the year 5281 BCE as the reference year for synchronising the Greenland and Antarctica ice core chronologies. In the case that our assumption is correct, this would imply the necessity to adjust the time of the event to an earlier date compared to the dates indicated by the existing ice core chronologies of the GICC05 (Greenland Ice Core Chronology 2005), adjusted according to Kobashi (2017), and WD2014 used for creating HolVol 1.0 (Holocene ice-core volcanic eruption catalogue from 9500 BCE - 1900 CE) by 67 and 54 years, respectively, for the period around 5300 BCE. A verification of our assumption could be conducted by examining the nearby Miyake event, a spike in cosmogenic radiocarbon, of 5258 BCE. Ice core layers displaying potential signs of this event should be approximately 25 years later than the markers of the Kikai volcanic eruption.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126271"},"PeriodicalIF":2.7,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444700","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-ring blue intensity measurements from treeline sites in the Ural Mountains exhibit a strong summer temperature signal","authors":"Viktoria V. Agapova ,&nbsp;Alberto Arzac ,&nbsp;Vladimir V. Kukarskih ,&nbsp;Ulf Büntgen ,&nbsp;Jan Esper ,&nbsp;Alexander V. Kirdyanov","doi":"10.1016/j.dendro.2024.126267","DOIUrl":"10.1016/j.dendro.2024.126267","url":null,"abstract":"<div><div>The high northern latitudes offer an ideal environment to analyze tree growth responses to unprecedented recent warming. In this study, for the first time, we explore the dendroclimatological potential of latewood blue intensity (LWBI) and delta blue intensity (DBI) at two Siberian larch (<em>Larix sibirica</em> Ledeb.) sites in the upper treeline ecotone of the Ural Mountains, northern Russia. To assess the climate signals encoded in LWBI and DBI, as well as tree-ring width (TRW) and maximum latewood density (MXD), we correlated these parameter-specific chronologies against monthly temperature means, precipitation totals, and the SPEI index. LWBI and BDI exhibit robust and stable positive correlations with summer temperature, higher than TRW but slightly lower than MXD at both sites, with marginal negative effects from precipitation and strong negative correlations with SPEI. As direct surrogates for MXD, LWBI and DBI from larch trees offer reasonable alternatives as proxies for temperatures in northern latitudes.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126267"},"PeriodicalIF":2.7,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319145","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":"Climatic and disturbances influence on tree-rings of Larix gmelinii in the southeast coastal area","authors":"Marina Evgenienva Rubleva ,&nbsp;Anna Stepanovna Vozmishcheva ,&nbsp;Svetlana Nikolaevna Bondarchuk","doi":"10.1016/j.dendro.2024.126264","DOIUrl":"10.1016/j.dendro.2024.126264","url":null,"abstract":"<div><div>The vast region of North East Asia is covered by primary mixed conifer-broadleaved forests which include a range of different tree species. A key factor in the dynamics of these ecosystems is wind disturbance. According to reports, this factor will be increasingly important as a result of the poleward migration of tropical cyclones, a characteristic of which is strong wind. At the same time, global climate change may reduce the recovery potency of some species and lead to new combinations of species. Gmelin Larch is one of the key early succession species in the north of the region. In the southeastern part of its range (Russian Far East), this species has not been widely studied by dendroclimatologists and there are no dendroecological studies available. This study shows how the seasonal growth of Larix gmelinii responds to changes in climate, specifically to variations in precipitation and temperature. The study has established that these trees are more affected by rising temperatures than by consistent precipitation levels, provided there is no shortage of water. Interestingly, after the 1970s there was a change in the climate sensitivity of Larix gmelinii in June (the month with the strongest correlation). It went from a negative correlation with temperature to a positive correlation with precipitation. By using tree ring data, we were able to reconstruct the past history of forest disturbance. The peaks in this chronology coincide with those in earlier published dendroecological reconstructions for other species. They indicate that the radial growth of larch is sensitive to canopy changes. We recorded two release peaks in the 1960s and 2000s, during the period of meteorological observations. We attributed the first peak to the most powerful tropical cyclone Emma (1956). We assume also that the second peak reflects the recent intensification of tropical cyclones in the region. In our opinion, the change in microclimate as a result of disturbance has altered the relationship to climate in such a way that disturbance may cause tree growth to be dependent on precipitation. At the same time, such low correlations do not support a conclusion about the strong negative influence of the current climate on the trees.</div></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126264"},"PeriodicalIF":2.7,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312109","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 and regional climatic constraints of shrub and tree growth near the treeline","authors":"J. Julio Camarero ,&nbsp;Antonio Gazol ,&nbsp;Elisa Tamudo ,&nbsp;Pavel A. Moiseev ,&nbsp;Michele Colangelo ,&nbsp;Cristina Valeriano","doi":"10.1016/j.dendro.2024.126256","DOIUrl":"10.1016/j.dendro.2024.126256","url":null,"abstract":"<div><p>Many treeline and shrublines are not responding to climate warming as fast as expected. This lack of responsiveness could be explained by other non-thermal, climate drivers operating at the cold edge of distribution of trees and shrubs. To determine which are the main climate drivers of tree and shrub radial growth near the treeline we measured ring width and related it to climate variables (temperature, precipitation, snow depth) and vegetation greenness (NDVI, Normalized Different Vegetation Index). We compared two dwarf shrub (<em>Vaccinium uliginosum</em>, <em>Dryas octopetala</em>) and three tree species (<em>Larix sibirica</em>, <em>Picea obovata</em>, <em>Pinus uncinata</em>) sampled in three treeline sites: Polar or Northern Urals, Southern Urals, and Spanish Pyrenees. Dwarf shrubs presented lower first-order autocorrelation (AR1) than trees, excepting in the N. Urals site. In this site, <em>V. uliginosum</em> showed a negative growth trend, whereas this tendency was observed in <em>P. obovata</em> and <em>P. uncinata</em> trees from the S. Urals and Pyrenees sites, respectively. Shrub and tree growth indices correlated with NDVI at different months. Trees showed stronger and positive growth responses to warmer summer conditions and also negative responses to precipitation in the N. and S. Urals. The growth of <em>D. octopetala</em> in the Pyrenees was enhanced by prior-winter and current-spring precipitation showing a strong correlation with May snow depth (<em>r</em> = 0.66, <em>p</em> = 0.0006, period 1998−2020). Dwarf shrubs and trees coexisting near the treeline differently responded to regional climate variability. Our findings indicate a strong dependence of shrubs and trees on local (e.g., snow depth) and regional (e.g., growing-season air temperature) climate conditions, respectively.</p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":"88 ","pages":"Article 126256"},"PeriodicalIF":2.7,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1125786524000936/pdfft?md5=4e2c88e77eefb321c03808ae8eea949b&pid=1-s2.0-S1125786524000936-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}