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113 results for “tree ring”
Tree ring, leaf mining, climate, and remote sensing data from aspen leaf miner survey sites: I - Basal area increment and d13C
This dataset contiains basal area increment (BAI) and d13C chronologies of 47 aspen cored in 2016 across four sites where leaf mining has been documented since 2004. Chronologies of BAI extend as far back as 1957 and up to 2015. Tree ring d13C chronologies extend from 2004-2015 and were measured on 23 trees from two fo the four sites.
Tree ring, leaf mining, climate, and remote sensing data from aspen leaf miner survey sites: II - Tree DBH and age
This dataset contiains tree level measurements of diameter at breast height (DBH) and age of aspen that were sampled in 2015 for tree ring anlyses. The tree ages provided are the age of the tree in 2015.
Tree Ring Widths for Loblolly Pine in the Eastern Shore of Virginia National Wildlife Refuge
Width of tree rings were measured on 25 Loblolly Pine trees in the Eastern Shore of Virginia National Wildlife refuge (37.125153-deg N, 75.965134-deg W.) to the nearest 0.001 mm.
Indexed tree-ring oak chronologies from Vitsebsk region, Belarus
<p>The dataset includes two indexed tree-ring oak chronologies which combines subfossil wood (Luchosa river), wood from Polotsk Saviour's Transfiguration Church, and wood from archaeological excavations in Vitsebsk and Polotsk (Northern Belarus). Both chronologies were absolute dated against chronologies from the neighboring regions as well as Baltic timber imported to the Western Europe (Baltic 1, 2, 3 chronologies).</p>
Carpathian tree-ring network for European beech and Norway spruce
<p>Basic ecological theory suggests that a tradeoff between competitiveness and stress tolerance dictates species range limits at regional extents. However, empirical support for this key theory remains deficient because the necessary spatial and temporal coverage and scalability of field observations have rarely been achieved. We harnessed an extensive dendroecological network (>22,000 tree-ring samples from 816 forest inventory plots) to disentangle competition-limited from climate-limited growth in both overstory and understory trees. Growth synchrony among trees thereby served as an integral metric of climate sensitivity, an approach that we justify in supplementary analyses of growth responses to temperature, precipitation, and the standardized precipitation-evapotranspiration index. Sampling plots were arranged along elevational climate and vegetation gradients throughout the Carpathian Mountains, ranging from mixed-species lowland forests to coniferous forests at high elevations. With mixed-effect modelling, we also identified non-climatic factors (stand characteristics, species diversity, and disturbance history) that modulate spatial patterns in the growth rate and synchrony of European beech (<em>Fagus sylvatica</em> L.) and Norway spruce (<em>Picea abies</em> (L.) Karst.). Beech exhibited reduced growth and increased climate sensitivity towards higher elevations but performed better when species diversity was higher. The growth of spruce increased towards its lower range boundary, but understory cohorts grew poorly under interspecific competition. Overall, climate sensitivity was lower in more productive stands with benign climatic conditions and in recently disturbed sites with reduced stand density. These contrasting performances at mid-elevations where the two species overlap (900 – 1300 m a.s.l.) reflect their evolutionary history, which enables them to be competitive (beech) or cold-stress tolerant (spruce). This history will affect interactions between the two species under climate warming and shape macroecological patterns in the Carpathian ecoregion and likely other parts of Europe. Our findings point to a growing advantage of competitively stronger species in montane and subalpine vegetation zones.</p>
Four historical tree-ring chronologies and underlying data derived from dendrochronological research on Batavia shipwreck timbers
<p>This dataset comprises four tree-ring chronologies and underlying tree-ring data derived from the dendrochronological research on the shipwreck timbers of the <em>Batavia</em> shipwreck. The undated tree-ring series have also been included.</p> <p>For context information about this dendrochronological dataset, please refer to the publication:</p> <p>Daly A, Domínguez-Delmás M, van Duivenvoorde W (2021) <em>Batavia</em> shipwreck timbers reveal a key to Dutch success in 17th-century world trade. PLOS ONE 16(10): e0259391. <a href="https://doi.org/10.1371/journal.pone.0259391">https://doi.org/10.1371/journal.pone.0259391</a> </p> <p> </p>
Tree-ring dataset derived from the 16th century Evangelistas altarpiece at Seville Cathedral (Spain)
<p>Tree-ring dataset in Heidelberg format of 29 oak (<em>Quercus</em> sp.) boards making up the panels of the Evangelistas altarpiece at Seville cathedral. This collaborative research and publication took place within the scope of the NWO-funded project <em>Filling in the blanks in European dendrochronology</em>. We also provide an excel sheet with metadata.</p>
Tree-ring dataset of black pine (Pinus nigra) along an elevation gradient in the Cazorla Mountains (South of Spain)
<p>Tree-ring dataset in Heidelberg and Tucson formats of <em>Pinus nigra</em> samples from living trees in four sites along an elevation gradient in the Cazorla and Segura Mountains (South of Spain). There are two types of files: the ones that contain the mean curves per tree (file code contains "mc"), and the ones containing the measurements of each individual core (files coded as "sm", single measurements). These samples were researched within the scope of the NWO-funded project <em>Filling in the blanks in European dendrochronology</em>. The results were published in the following article:</p> <p>Domínguez-Delmás, M., Alejano-Monge, R., Wazny, T., García González, I<em>.</em>, 2013. Radial growth variations of black pine along an elevation gradient in the Cazorla Mountains (South of Spain) and their relevance for historical and environmental studies. <em>Eur J Forest Res</em> <strong>132, </strong>635–652. https://doi.org/10.1007/s10342-013-0700-7</p> <p>Refer to the article for further information.</p> <p> </p>
Tree-ring stable isotopes suggest an increase in Asian monsoon rainfall at 4.2 ka BP
<p>A synthesis of stable oxygen isotope records from tree rings and speleothems does not support a significant hydroclimate transition in our study region around 4.2 ka, nor the notion that this rapid climate deterioration should be regarded as generalized climatic transition from the mid to late Holocene. </p>
Data from: Contrasting climate sensitivity of Pinus cembra tree-ring traits in the Carpathians
<p class="MsoNormal"><span>High elevation ecosystems are one of the most sensitive to climate change. The analysis of growth and xylem structure of trees from marginal populations, especially the ones growing at the treeline, could provide early-warning signs to better understand species-specific responses to future climate conditions. In this study, we combined classical dendrochronology with wood density and anatomical measurements to investigate the climate sensitivity of <em>Pinus cembra</em> L., a typical European high-elevation tree species </span><span>distributed in isolated patches</span><span> in the Carpathians. Samples were collected from the Retezat Mountains, South-Western Romania. We analyzed ring-width (TRW), maximum density (MXD), xylem anatomical traits (cell number per ring (CNo), cell density (CD), conduit area (CA), and cell-wall </span><span>thickness (CWT)) time series, split into </span><span>ring </span><span>sectors and assessed the relationships with monthly and daily climate records over the last century (1901-2015). The analysis showed a strong dependency of TRW on CNo and MXD on CWT. Summer temperature positively correlated with MXD and CWT (monthly correlation (<em><span>r) </span></em><span>were<em> </em></span>0.65 and 0.48 respectively) from the early- to late-wood but not TRW (<em><span>r</span></em>=0.22). CA positively correlated with water availability (<em><span>r=</span></em>0.37) and negatively correlated with temperature (<em><span>r=</span></em>-0.39). This study improves our general understanding of the climate-growth relationships of a European</span><span> high-elevation tree species and the results could be considered for forecasting population dynamics on projected changes in climate.</span></p>
An Automated Method for Measuring Tree Rings Based on Super Resolution and Image Segmentation
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Tree rings as a proxy for seasonal precipitation variability and Early Neolithic settlement dynamics in Bavaria, Germany
<p>The file contains original measurements of total ring width (TRW) of 540 subfossil oak trees from the Main region (southern Germany) spanning the period from 6228 to 4057 BCE (2172 years).</p> <p>Latitude: 49.6-50.2°N</p> <p>Longitude: 10.2-11.2°E</p> <p>Resolution of measurement: 0.01 mm</p> <p>File format: Tucson (.tuc)</p>
Building pseudo latewood tree ring records for De Soto National Forest using MPI-ESM synthetic storms for the past millennium
<p>This release contains the past millennium synthetic storm dataset (MPI-ESM) passing De Soto National Forest (31.08<span>°</span>,-89.08<span>°</span>) and scripts needed to develop pseudo tree ring and sediment records used in Wallace et al. (2024).</p>
Intra-annual-tree-ring-stable-carbon-and-oxygen-isotope-of-Chinese-pine-in-Helan-Mountains
<p>The data are intra-annual series of tree-ring stable carbon (δ<sup>13</sup>Ccor) and oxygen (δ<sup>18</sup>O) isotopes from Chinese pine (<em>Pinus tabuliformis</em>) in Helan Mountains</p>
Data for: Tree-ring 15N isotope of red alder
<p>Nitrogen (N) accretion rates under N<sub>2</sub>-fixing tree species can vary with site condition and possibly decline over time with down-regulation of N fixation. Tree-ring δ<sup>15</sup>N may depict these site-specific, long-term patterns in N dynamics, but field trials with N<sub>2-</sub>fixing tree species are lacking. We examined whether tree-ring δ<sup>15</sup>N of N<sub>2</sub>-fixing red alder (<em>Alnus rubra</em>) would mirror N accretion rates and δ<sup>15</sup>N of soils. We sampled a 27-year-old replacement series trial on southeastern Vancouver Island with red alder and coastal Douglas-fir (<em>Pseudotsuga menziesii</em>) in five proportions (0/100, 11/89, 25/75, 50/50, and 100/0, respectively). A<span>n escalation in forest floor N content was evident with an increasing proportion of red alder, equivalent to a difference of approximately 750 kg N ha<sup>-1</sup> between 100% Douglas-fir vs. 100% alder. The forest floor horizon was also enriched in </span>δ<sup>15</sup>N<span> under denser red alder treatments. </span><span>Red alder had a consistent quadratic fit in tree-ring </span><span>δ</span><sup><span>15</span></sup><span>N over time, with a net increase of </span><span>1.5</span><span>‰</span><span>, on average, before declining slightly. Douglas-fir tree-ring </span><span>δ</span><sup><span>15</span></sup><span>N, in contrast, was largely unchanged over time (in 3 of 4 plots) but significantly enriched in the 50/50 mix. The minor differences in current litter N content and leaf </span><span>δ</span><span>15</span><span>N between alder and Douglas-fir suggests the declining trend in alder tree-ring </span><span>δ</span><sup><span>15</span></sup><span>N could coincide with lower N-fixation rates, either by down-regulation via nitrate availability or loss in alder vigour with shading and drought. We suggest tree-ring </span><span>δ</span><sup><span>15</span></sup><span>N can provide insights into the abiotic constraints and facultative/obligate nature of N fixation for N<sub>2</sub>-fixing trees.</span></p>
Hotter drought and trade-off between fast and slow growth strategies as major drivers of tree-ring growth variability of global conifers
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Data from: Vegetation growth responses to climate change: A cross-scale analysis of biological memory and time-lags using tree ring and satellite data
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Data from:Quantitative wood anatomical characteristics, basal area increments (BAI) and tree-ring derived intrinsic water-use efficiency (iWUE) for three coniferous tree species in Central Spain
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Can oxygen isotopes in tree rings be used to detect stomatal responses to global change?
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Tree-ring stable isotopes suggest an increase in Asian monsoon rainfall at 4.2 ka BP
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