scholarly journals Climatic significance of tree-ring width and intra-annual density fluctuations inPinus pineafrom a dry Mediterranean area in Portugal

2007 ◽  
Vol 64 (2) ◽  
pp. 229-238 ◽  
Author(s):  
Filipe Campelo ◽  
Cristina Nabais ◽  
Helena Freitas ◽  
Emilia Gutiérrez
Keyword(s):  
Tree Ring ◽  
Ring Width ◽  
Mediterranean Area ◽  
Density Fluctuations ◽  
Tree Ring Width

Intra-annual wood density fluctuations and tree-ring width patterns are sex- and site-dependent in the dioecious conifer Juniperus thurifera L.

Trees ◽  
2015 ◽  
Vol 29 (5) ◽  
pp. 1341-1353 ◽  
Author(s):  
José Miguel Olano ◽  
A. I. García-Cervigón ◽  
A. Arzac ◽  
V. Rozas
Keyword(s):  
Tree Ring ◽  
Wood Density ◽  
Ring Width ◽  
Density Fluctuations ◽  
Tree Ring Width ◽  
Juniperus Thurifera

Growth, isotope records and quantitative wood anatomy reveal species-specific couplings in three Mexican conifers inhabiting drought-prone areas

2020 ◽  
Author(s):  
Giovanna Battipaglia ◽  
Arturo Pacheco ◽  
Julio Camarero ◽  
Marin Pompa-Garcia ◽  
Jordi Voltas ◽  
...  
Keyword(s):  
Cell Wall ◽  
Tree Ring ◽  
Tree Species ◽  
Wood Anatomy ◽  
Ring Width ◽  
Density Fluctuations ◽  
Climate Change Scenarios ◽  
High Plasticity ◽  
Lumen Area ◽  
Tree Ring Width

<p>An improvement of our understanding of how tree species will respond to warmer conditions and longer droughts requires comparing their responses across different environmental settings and considering a multi-proxy approach. We used different xylem traits (tree-ring width, formation of intra-annual density fluctuations –IADFs, wood anatomy, D<sup>13</sup>C and d<sup>18</sup>O records) to retrospectively quantify these responses in three conifers inhabiting two different drought-prone areas in northwestern Mexico. A fir species (Abies durangensis) was studied in a higher altitude and more humid site and two pine species were sampled in a nearby, drier site (Pinus engelmannii, Pinus cembroides). Tree-ring-width indices (TRWi) of all the species showed very similar year-to-year variability, likely indicating a common climatic signal throughout the whole region. Wood anatomy analyses, covering over 3.5 million measured cells, showed that P. cembroides lumen area was much smaller than in the other two species and it remained constant along all the studied period (over 64 years). Alternately, cell wall was ticker in P. engelmannii which also presented the highest amount of intra-annual density fluctuations. Climate and wood anatomy correlations pointed out that lumen area was positively affected by winter precipitation for all the species, while cell-wall thickness was negatively affected by current season precipitation in all species but P. cembroides, suggesting this taxon may be better adapted to withstand drought than its coexisting conifer with thinner cell walls resulting from wet winters. Stable isotope analysis showed in P. cembroides some of the lowest cellulose-Δ<sup>13</sup>C mean values ever reported in the literature for a forest tree species, although there were no particular trend differences between the studied species. As well, no significant δ<sup>18</sup>O differences where found between the three species, but they shared a common decreasing trend. With very distinct wood anatomical traits (smaller cells, compact morphology), P. cembroides stood out as the better-adapted species in its current environment and could be less affected by future drier climate. P. engelmannii and A. durangensis showed high plasticity at wood anatomical level, allowing them to promptly respond to seasonal water availability, however this feature may provide few advantages on future climate scenarios with longer and more frequent drought spells. Further research, including xylogenesis analysis and monitoring of different populations of these tree species, would be still necessary to reach a clearer understanding of their future responses to weather patterns. Our multi-proxy approach could be used in other forests to characterize the in situ functioning of trees, e.g. growth, water use, and development of strategies for forest management under the current climate change scenarios.</p>

Intra-annual density fluctuations of Pinus pinaster are a record of climatic changes in the western Mediterranean region

2010 ◽  
Vol 40 (8) ◽  
pp. 1567-1575 ◽  
Author(s):  
Joana Vieira ◽  
Filipe Campelo ◽  
Cristina Nabais
Keyword(s):  
Tree Ring ◽  
Pinus Pinaster ◽  
Mediterranean Region ◽  
Ring Width ◽  
Climatic Changes ◽  
Western Mediterranean ◽  
Density Fluctuations ◽  
Tree Ring Width ◽  
Recent Climate ◽  
Average Annual Temperature

Climate projections for the Mediterranean area estimate a decline in total precipitation, warmer temperatures, and a higher frequency of extreme drought events. It is important to understand how trees respond to these climatic changes and which wood anatomical structures best document the trees’ response to those changes. The present work investigates the climatic signal of tree-ring width, latewood width, and the frequency of intra-annual density fluctuations (IADFs) during the last 100 years for Pinus pinaster Aiton growing in the western Mediterranean region. Based on meteorological data, it was observed that since the 1950s, average annual temperature and autumn and winter precipitation increased. Tree-ring width and latewood width of P. pinaster were positively correlated with winter and summer precipitation and negatively correlated with spring and summer temperatures. The frequency of latewood IADFs showed a positive and time-stable correlation with September and October precipitation. However, after the 1970s, the frequency of IADFs also became correlated with climatic conditions later in the year, specifically with the temperatures of November and December, probably because of the recent climate changes. IADFs chronologies, besides being very useful to reconstruct autumn precipitation, can add new climatic information to ring-width chronologies.

CLIMATE CHANGE, TREE-RING WIDTH AND WOOD DENSITY OF PINES IN MEDITERRANEAN ENVIRONMENTS

IAWA Journal ◽  
2015 ◽  
Vol 36 (3) ◽  
pp. 257-269 ◽  
Author(s):  
Jorge Olivar ◽  
Cyrille Rathgeber ◽  
Felipe Bravo
Keyword(s):  
Tree Ring ◽  
Wood Density ◽  
Pinus Halepensis ◽  
Moving Average ◽  
Wood Quality ◽  
Ring Width ◽  
Growth Period ◽  
Mediterranean Area ◽  
Tree Ring Width ◽  
Pine Species

During the second half of the 20th century, the Mediterranean area has experienced an increase in temperature, and a decrease in precipitation leading to a higher frequency of severe droughts. Consequently, widespread Mediterranean pine species suffered a shift in their climate-growth relationships that might lead to detrimental consequences. Wood features such as wood density are also affected by recent climatic changes producing an effect on wood structure and quality. Tree-ring anatomy was analyzed in three species (Pinus halepensis, P. pinaster and P. sylvestris), the three main pine species in Spain, in order to understand the relationships between tree-ring width and wood density as well as the influence of the climatic variations on these variables. Precipitation influenced tree radial growth and wood density for the three species, but at different times of the growth period. Mean and maximum density followed different patterns for the three species, decreasing with time in P. pinaster and increasing in P. halepensis and P. sylvestris. Growth and mean density trends were followed by a 5-year moving average with low variability in the three species. However, a high variability was observed in the inter-annual trends during the most recent years presumably related to climate. These climate-triggered modifications could adversely effect wood properties and wood quality.

Ecological interpretation of tree-ring width and intraannual density fluctuations inPinus sylvestrison dry sites in the central Alps and Siberia

2001 ◽  
Vol 31 (1) ◽  
pp. 18-31 ◽  
Author(s):  
Andreas Rigling ◽  
Philipp O Waldner ◽  
Theodor Forster ◽  
Otto U Bräker ◽  
Antti Pouttu
Keyword(s):  
Tree Ring ◽  
Radial Growth ◽  
Function Analysis ◽  
Ring Width ◽  
Growing Season ◽  
Density Fluctuations ◽  
Climatic Data ◽  
Central Alps ◽  
Tree Ring Width ◽  
Soil Substrate

The radial growth of Pinus sylvestris L. from nine sites at the semiarid lower forest border of the central Alps (Switzerland) and central Siberia (Russia) has been investigated using dendroecological methods. Tree growth differed according to soil substrate, with trees on dune sites showing lower mean ring widths, lower mean sensitivities, and higher autocorrelation. The relationships between climate and tree-ring width were studied using response function analysis. Independent of the climatic zone and the soil substrate, precipitation just before and at the beginning of the growing season is positively correlated with radial growth. The climatic response of dune sites is low, possibly because of the poor water-holding capacity and the high permeability of the sandy soils. Intraannual density fluctuations (IADFs) were observed at all the sites. Most IADFs were found in latewood. On dunes, fewer cores contain IADFs, and their frequency is lower. All stands showed significant relationships between IADF frequency and tree-ring width (positive) and ring age (negative). For Swiss sites, moist-cool conditions in the middle of the growing season are demonstrated as the triggering factor for IADFs. For the Russian sites, inadequate climatic data made it impossible to demonstrate any climate dependence of IADFs.

Climate control of cambial dynamics and tree-ring width in two tropical pines in Thailand

2021 ◽  
Vol 303 ◽  
pp. 108394
Author(s):  
Nathsuda Pumijumnong ◽  
Piyarat Songtrirat ◽  
Supaporn Buajan ◽  
Sineenart Preechamart ◽  
Uthai Chareonwong ◽  
...  
Keyword(s):  
Tree Ring ◽  
Ring Width ◽  
Tree Ring Width ◽  
Climate Control

Climatic implications of a 3585-year tree-ring width chronology from the northeastern Qinghai-Tibetan Plateau

2010 ◽  
Vol 29 (17-18) ◽  
pp. 2111-2122 ◽  
Author(s):  
X. Shao ◽  
Y. Xu ◽  
Z.-Y. Yin ◽  
E. Liang ◽  
H. Zhu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Ring Width ◽  
Tree Ring Width
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