Dendrochronologia最新文献

{"title":"Dendrochronological advances in the tropical and subtropical Americas: Research priorities and future directions","authors":"Laia Andreu-Hayles ,&nbsp;Ernesto Tejedor ,&nbsp;Rosanne D’Arrigo ,&nbsp;Giuliano Maselli Locosselli ,&nbsp;Milagros Rodríguez-Catón ,&nbsp;Valerie Daux ,&nbsp;Rose Oelkers ,&nbsp;Arturo Pacheco-Solana ,&nbsp;Kathelyn Paredes-Villanueva ,&nbsp;Clara Rodríguez-Morata","doi":"10.1016/j.dendro.2023.126124","DOIUrl":"10.1016/j.dendro.2023.126124","url":null,"abstract":"<div><p>This Special Issue presents recent advancements in tropical dendrochronology in the tropical and subtropical Americas, focusing on the identification of new species for dendrochronological studies, the assessment of climate information contained in tree-ring records, and systematic reviews of past research. The studies included in this issue significantly contribute to our understanding of tree species suitable for dendrochronology and the improvement of dating techniques. Moreover, they delve into the relationships between climate variables and tree growth, offering insights into the response of tropical forests to environmental change and providing tools for reconstructing past climate conditions. These studies also shed light on the challenges associated with accurately distinguishing annual ring boundaries in tropical species with complex anatomical structures and emphasize the importance of integrating complementary dating methods and visualization techniques to enhance the reliability of dendrochronological studies in the tropics. By synthesizing diverse research findings, this Special Issue offers a comprehensive overview of tropical dendrochronology in the American (sub) tropics, revealing gaps in knowledge, and suggesting potential avenues for future research. Ultimately, these advancements promote a deeper understanding of tropical forests, their role in the global climate system, and the need for their sustainable management and conservation.</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":"47378682","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":"Drivers of Robinia pseudoacacia L. growth during stand development on the Loess Plateau, China","authors":"Xu Zhang ,&nbsp;Meng Chen ,&nbsp;Ming Li ,&nbsp;Linjia Huang ,&nbsp;Yang Cao","doi":"10.1016/j.dendro.2023.126132","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126132","url":null,"abstract":"<div><p><span>Although climate variables have been shown to strongly affect plantation growth processes, little is known about the roles of tree size and nutrient element in radial growth processes during stand development on the Loess Plateau (LP), China. Total 98 tree-ring cores of </span><span><em>Robinia pseudoacacia</em></span> L. were collected from four stand age-class on LP. We redefined the growth period of <em>R. pseudoacacia</em> based on all combined tree rings and analyzed the influencing factors of each growth period based on the detrending tree ring width chronologies. The effects of climate, tree size, element concentrations, and their interaction effects on tree growth were investigated using linear model and variation partitioning analysis. The results showed that radial growth of <em>R. pseudoacacia</em> was redefined as two growth periods: Decreased Growth Period (1–20 years) and Stable Growth Period (21–40 years). Climate factors mainly controlled tree radial growth in the Stable Growth Period rather than the Decreased Growth Period. The radial growth in the Stable Growth Period was primarily promoted by summer drought, which has 34.1 % of the variables effect percentage. Tree radial growth of <em>R. pseudoacacia</em> in the Decreased Growth Period was mainly promoted by phosphorus (P) concentration, which explained 41.1 % of the variables effect percentage. Contrary to expectations, tree size and the interaction effect of all variables hardly impact on tree radial growth in the two growth periods. Our research illustrated that appropriate nutrient supplementation, such as P elements, occurred during the Decreased Growth Period, followed by thinning practice and tree composition to alleviate climate effects. Overall, our results provide valuable information for formulating appropriate management strategies for <em>R. pseudoacacia</em> plantations on the LP in changing climate.</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":"49752024","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":"Hymenaea stignocarpa Mart. ex Hayne growth–climate relationships are regulated by soil water saturation in Cerrado-Pantanal ecotone","authors":"José Guilherme Roquette ,&nbsp;Francisco de Almeida Lobo ,&nbsp;George Louis Vourlitis ,&nbsp;Fidel Alejandro Roig ,&nbsp;Carmen Eugenia Rodríguez Ortíz ,&nbsp;Nelson Mario Banga ,&nbsp;Leif Armando Portal-Cahuana ,&nbsp;Mario Tomazello-Filho","doi":"10.1016/j.dendro.2023.126130","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126130","url":null,"abstract":"<div><p>The expected intensification of the dry season, and concentration of rainfall during the wet season, can disrupt tree growth and regional biodiversity in the Cerrado-Pantanal transition zone. Thus, this study aims to assess the climatic responses of <em>Hymenaea stigonocarpa</em><span><span> tree growth, a common tree species in this region. Incremental cores were collected at breast height (ca. 1.3 m) from 67 trees to construct a dendrochronological series to correlate annual growth with local meteorological variables and large-scale atmospheric circulation indices from the Pacific and Atlantic Oceans. Significant positive correlations were observed between tree growth and the Pacific Ocean indices. Maximum and average air temperatures of the previous dry season negatively influenced growth, while precipitation at the beginning of the growth season (November) positively influenced growth. Tree growth was not correlated with temperature or rainfall during the wet season. However, at the end of the wet season (February), tree growth was negatively correlated with air temperature and positively correlated with rainfall, but the relationship shifted in the next month (March) suggesting that </span>soil water saturation reduced growth. Our results indicate that dendrochronological studies of </span><em>H. stignocarpa</em><span> are useful for assessing the environmental change on the Cerrado-Pantanal ecotone<span><span>. Furthermore, variations in water availability and temperature associated with changes in large-scale oceanic circulation and local meteorological conditions will impact the growth dynamics of this important </span>Cerrado tree species.</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":"49759591","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":"Towards ROXAS AI: Deep learning for faster and more accurate conifer cell analysis","authors":"Marc Katzenmaier ,&nbsp;Vivien Sainte Fare Garnot ,&nbsp;Jesper Björklund ,&nbsp;Loïc Schneider ,&nbsp;Jan Dirk Wegner ,&nbsp;Georg von Arx","doi":"10.1016/j.dendro.2023.126126","DOIUrl":"10.1016/j.dendro.2023.126126","url":null,"abstract":"<div><p>Quantitative wood anatomy (QWA) has proven to be a powerful method for extracting relevant environmental information from tree-rings. Although classical image-analysis tools such as ROXAS have greatly improved and facilitated measurements of anatomical features, producing QWA datasets remains challenging and time-consuming. In recent years, deep learning techniques have drastically improved the performance of most computer vision tasks. We, therefore, investigate three different deep learning models (U-Net, Mask-RCNN, Panoptic Deeplab) to improve the main bottleneck, cell detection. Therefore, we create a Conifer Lumen Segmentation (CoLuS) dataset for training and evaluation. It consists of manual outlines of each cell lumen from anatomical images of several conifer species that cover a wide range of sample qualities. We furthermore apply our deep learning model to a previously published high-quality QWA chronology from Northern Finland to compare the warm-season (AMJJAS) temperature reconstruction skill of our deep learning method with that of the current ROXAS implementation, which is based on classical image analysis. Based on our evaluation dataset we show improvements of 7.6% and 8.1% for our best performing deep learning model (U-Net) for the computer vision metrics mean Intersection over Union (mIoU) and Panoptic Quality (PQ) compared to automatic ROXAS segmentation, in addition to being much faster. Furthermore, U-Net reduces the percentage error compared to automatic ROXAS analysis - which tends to systematically underestimate lumen area - by 57.8% for lumen area, 63.2% for average cell wall thickness, and 54.1% for cell count. In addition, we show higher performance for the U-Net compared to the Mask-RCNN previously used for tree cell segmentation. These improvements are independent of sample quality. For the Northern Finland QWA chronology, our U-Net model matches or outperforms ROXAS with and without manual post-processing, showing a common signal (Rbar) of 0.72 and a AMJJAS temperature correlation of 0.81 for maximum radial cell wall thickness. A clear improvement is especially visible for the anatomical latewood density, likely due to the better detection of small cell lumina. Our results demonstrate the potential of deep learning for higher-quality segmentation with lower manual post-processing time, saving weeks to months of tedious work without compromising data quality. We thus plan to implement deep learning in a future version of ROXAS.</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":"49235983","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 variability impacts on growth of African grape (Lannea microcarpa Engl & K. Krause) in West Africa","authors":"Kapoury Sanogo ,&nbsp;Larba Hubert Balima ,&nbsp;Jules Bayala ,&nbsp;Meine van Noordwijk ,&nbsp;Aster Gebrekirstos","doi":"10.1016/j.dendro.2023.126131","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126131","url":null,"abstract":"<div><p><span><em>Lannea</em><em> microcarpa</em></span><span><span><span> is a deciduous tree with high socio-economic value in West African </span>agroforestry systems. While climate-growth relationships remain unknown, this species is exposed to climate extremes. Knowledge of its response to </span>climate variations is needed for its sustainable management. Therefore, the present study aimed to examine the growth of </span><em>Lannea microcarpa</em><span> in two climatic zones<span> in West Africa (Sudanian zone of Mali and Sudano-Sahelian zone of Burkina Faso) using standard dendrochronological methods. In both sites, </span></span><em>Lannea microcarpa</em> forms distinct growth ring-boundaries characterized by a wider band with more parenchyma cell rows and is also marked by its solitary vessels. The two standard chronologies developed were significantly correlated with the precipitation records in both Burkina Faso (r² = 0.41, n = 30 years, p &lt; 0.01) and Mali (r² =0.60, n = 53 years, p &lt; 0.001). Furthermore, a strong relationship between major seasonal precipitation (between June and September) and residual chronology was observed in Burkina Faso (r² = 0.51, n = 28 years, p &lt; 0.01) and Mali (r² = 0.65, n = 52 years, p &lt; 0.001). The formation of annual growth rings is clearly influenced by climate variability, but not all variance is accounted for. The insignificant correlation between the chronologies of the two regions may be due to various factors, including differences in climate factors and soil conditions influencing buffered water availability. Similar studies on other tree species in West Africa will be useful.</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":"49752023","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":"Ring data provide management clues and pinpoint climate drivers of growth in two species of miombo trees (Brachystegia spiciformis, Julbernardia paniculata)","authors":"Abilio Santos-Malengue ,&nbsp;David Ariza-Mateos ,&nbsp;Rafael Navarro-Cerrillo ,&nbsp;Antonio M. Cachinero-Vivar ,&nbsp;J. Julio Camarero","doi":"10.1016/j.dendro.2023.126117","DOIUrl":"10.1016/j.dendro.2023.126117","url":null,"abstract":"<div><p>Tree-ring studies are still lacking in tropical African forests. This is the case in the seasonally dry miombo forests located in Southern Africa. In the Angolan miombo, subject to intense charcoal exploitation, tree-ring data is urgently needed to estimate the age at which the minimum permitted cutting diameter is reached. Further, climate-growth relationships must be also investigated to understand how major miombo tree species respond to climate constraints and teleconnections such as the El Niño Southern Oscillation (ENSO). To achieve both aims, we studied radial growth data of two miombo tree legume species (<em>Brachystegia spiciformis</em>, <em>Julbernardia paniculata</em>) in wet (Bailundo) and dry (Caála) Angolan sites using dendrochronological methods. Both species have diffuse porous wood and conspicuous ring boundaries delimited by terminal parenchyma in latewood. Sampled individuals had ages (at 1.3 m) between 28 and 34 years with ring widths ranging 3.8–4.3 and 5.5–6.0 mm in dry and wet sites, respectively. In the wet (dry) site, <em>Brachystegia</em> and <em>Julbernardia</em> reached maximum diameter increment rates of 1.05–1.32 (0.74–0.91) cm yr⁻¹ at an age of 12 (14−20) years. Both species took 12–15 years to reach a minimum cutting diameter of 15 cm. The growth variability among conspecific individuals was lower in the dry (mean standard error, 1.4 cm) than in the wet site (mean standard error, 2.7 cm). We also found that wet conditions from November to February, often linked to El Niño events, enhanced growth for both species, with greater growth consistency among individuals and higher sensitivity to climate found in the dry site. This information may help to estimate the optimal age for minimum cutting diameter that guarantees the sustainable use of charcoal and fuelwood.</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":"47481216","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":"Frost rings as time markers in Northern Hemisphere tree-ring chronologies, with special reference to the 1627 BC and AD 536 events","authors":"Samuli Helama","doi":"10.1016/j.dendro.2023.126125","DOIUrl":"10.1016/j.dendro.2023.126125","url":null,"abstract":"<div><p><span>This paper discusses the findings of frost rings in three supra-long Northern Hemisphere tree-ring chronologies. Comparison between recently published data representing bristlecone pine<span> from western North America, Scots pine from northern Fennoscandia and Siberian larch and Siberian spruce from the Yamal Peninsula shows the rare occurrence of frost rings dated to exactly same calendar years in more than one of these chronologies. The frost ring dates evident in all three datasets are dated to 1627 BC and AD 536. Previously, tree-ring features indicative of adverse growing conditions </span></span><em>around</em><span> 1627 BC have been discussed in the literature. Here, it is emphasised that the frost rings 1627 BC and AD 536 are dated to exactly same calendar year in all available tree-ring records, which demonstrates the value of such an event as a definitive time marker. Other major events of frost rings from multiple sites were dated to 421 BC, 251 BC, AD 627, AD 884, AD 985, AD 1109, AD 1259, AD 1453, AD 1601 and AD 1884. Similar to 1627 BC and AD 536, some of these events have been attributed to volcanic forcing and climate anomalies that led to human consequences and disasters. The case of the 1650 s BC appears different, with possibility of more than one major eruptions, as suggested by frost ring events dated to 1656 BC and 1653 BC in Yamal and western USA, respectively.</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":"44690889","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":"Dendroecological analysis of the remote endemic Nothomyrcia fernandeziana forests of Robinson Crusoe Island in the Southeast Pacific","authors":"Pamela Almonacid ,&nbsp;Moisés Rojas-Badilla ,&nbsp;Carlos LeQuesne ,&nbsp;Tomás Muñoz-Salazar ,&nbsp;Duncan A. Christie","doi":"10.1016/j.dendro.2023.126129","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126129","url":null,"abstract":"<div><p><span>Juan Fernández Archipelago National Park is located in the Southeast Pacific Ocean ∼670 km off the coast of Chile. Composed by three islands, encompasses an ecosystem with 208 native plant species of which 64% are endemic. Robinson Crusoe Island (RCI) is the largest and the only with a permanent human population. Among the tree species of RCI, </span><em>Nothomyrcia fernandeziana</em><span> is the most abundant and dominant forming part of this fragile forest ecosystem. Despite this, there is very little information regarding its autoecology and conservation. Therefore, the objective of this work was to determine the radial growth patterns of </span><em>N. fernandeziana</em> and its longevity using dendrochronological methods. For this purpose, cross sections of trees blown down by wind were collected in conjunction with park rangers from five different sites and analyzed using tree-ring methods. Our results confirm that <em>N. fernandeziana</em> is a shade-tolerant species capable of maintaining extremely low initial growth rates under the canopy for several decades. Individual growth series were found to respond rapidly to changes in environmental conditions, revealed by abrupt positive and negative changes in their annual growth. Our data indicate a longevity of up to 450 years, with one <em>N. fernandeziana</em><span> individual established in the mid XVII century before the arrival of humans to the pristine island ecosystem. The results of this study are essential to strengthen RCI conservation plans considering restoration actions based on the autoecology of this rare endemic tree species, and the control of exotic invasive species that presently threatens the RCI forests ecosystems.</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":"49752045","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 dynamic and climate signals on abandoned plantation of Pinus elliottii in Southern Brazil: A dendrochronological contribution","authors":"Gabriela Morais Olmedo ,&nbsp;Bruna Hornink ,&nbsp;Bruna Borne Arenhardt ,&nbsp;Anderson Juliano Nunes ,&nbsp;Carlos de Oliveira ,&nbsp;Izidoro Sarmento do Amaral ,&nbsp;Marina Remião dos Santos ,&nbsp;Cláudia Fontana ,&nbsp;Juliano Morales de Oliveira","doi":"10.1016/j.dendro.2023.126136","DOIUrl":"https://doi.org/10.1016/j.dendro.2023.126136","url":null,"abstract":"<div><p><span><em>Pinus</em></span><span><span> plantation forestry<span> in South America has expanded quickly and assumed a significant portion of land use, including in urban arborization. This invasive alien genus changes the plant community, resulting in a loss of biodiversity, and environmental issues that require public policy actions. Here, we applied </span></span>dendrochronology to assess ecological growth dynamics and micro and macro scale climate effects on an abandoned </span><span><em>Pinus elliottii</em></span><span> trees in urban forest fragments, and provide insights into the management for public policies. We constructed a robust 41-year (1978 – 2019) chronology that showed </span><em>r</em> = 0.63, <em>r</em>bar = 0.47, and EPS = 0.92 with an average annual growth rate of 7.10 mm/year. Modeling tree growth of diameter, height and volume of <em>P. elliottii</em><span> based on tree-ring analysis, we assessed the average diameter without bark (42.37 cm) and height (19 m). The growth rates in the early years evidence pioneer behavior, representing rapid sexual maturity. The volume growth model indicates an average individual volume of 1.23 m³ , with maximum productivity at 16 years when the current annual volume increment peaks. This age corresponds to a diameter of 32 cm, which would be an appropriate minimum logging diameter to wood destined for a sawmill. Volumetric increment rates highlight the potential trade-in forestry sector and application in public policies that aim to control and manage </span><em>P. elliotti</em><span>. We evidence significant climatic signals, but with moderate influence on the variability of growth. For the local climatic variables, there was a positive influence of warm and humid summer and late spring, during the previous and current growth seasons. Furthermore, considering global climatic factors<span>, there was only a positive influence of the Annual Southern Oscillation<span> Index for June, representing a positive correlation for dry and cold early winter, influenced by La Niña events. This work provides an understanding of the biological growth of </span></span></span><em>P. elliotti</em> in urban forest fragments and opens a perspective to assist public policies in managing the invasion of <em>Pinus</em> spp. linked to the forest trade.</p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49765224","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":"Responses of radial growth and stable carbon isotopes to climate in the northern Tianshan Mountains","authors":"Li Qin,&nbsp;Yujiang Yuan,&nbsp;Shulong Yu,&nbsp;Huaming Shang,&nbsp;Tongwen Zhang,&nbsp;Ruibo Zhang","doi":"10.1016/j.dendro.2023.126098","DOIUrl":"10.1016/j.dendro.2023.126098","url":null,"abstract":"<div><p>Climate change has profound effects on forest ecosystems. Schrenk spruce (<em>P. schrenkiana</em><span><span>) is a natural conifer species endemic to the arid inland areas of </span>Asia. In this study, the relationship between tree-ring parameters of </span><em>P. schrenkiana</em><span><span> and major meteorological factors were analyzed, and the main limiting factors for tree radial growth and stable carbon isotope fractionation were explored. Our results indicate that </span>moisture stress before and during the growing season have an important influence on radial growth of </span><em>P. schrenkiana</em><span>, especially, the correlation coefficient<span> between tree-ring width and vapor pressure deficit (VPD) from previous August to current July is as high as −0.622 (n = 51, p &lt; 0.01). Collinearity analysis further supports the conclusion that the limiting factor for the radial growth of </span></span><em>P. schrenkiana</em> is moisture. Although the correlation analysis results show that the tree-ring δ¹³C_corr<span> is significantly positively correlated with sunshine duration (SD), additional analysis based on first order difference variables suggests that the climate factor may not be the only limiting factor for the stable carbon isotope fractionation of tree rings in the Sayram Lake Basin. This lays the foundation for the assessment of forest management practices and carbon sink capacity in light of future climate change.</span></p></div>","PeriodicalId":50595,"journal":{"name":"Dendrochronologia","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48917029","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}