Tree Ring Analysis of Araucaria Angustifolia in Southern Brazil: Preliminary Results

Tree ring analysis of Araucaria angustifolia trees grown at the forest research station Sao Joao do Triunfo of the University of Parana has been carried out.Disks were taken from 10 trees at the height of 2 m and on each disk 8 radii were used for measurement of ring width.The preliminary results indicate that there is within-tree-variation in the ring series. The mean intra-correlation coefficient for the ring widths between the radii varied between 0.57 and 0.89.A mean correlation of 0.60 for all pairs of trees was obtained indicating consistency in the index series between the trees. This made it possible to construct an average tree ring index for the stand.

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Growth and yield estimation of Chamaecyparis spp. through tree ring analysis

Banko Janakari ◽

10.3126/banko.v22i2.9197 ◽

2013 ◽

Vol 22 (2) ◽

pp. 36-42 ◽

Cited By ~ 1

Author(s):

D. K. Kharal ◽

T. Fujiwara

Keyword(s):

Tree Ring ◽

Radial Growth ◽

Ring Width ◽

Forest Products ◽

Growth And Yield ◽

Tree Age ◽

Biomass Estimation ◽

Tree Ring Analysis ◽

Ring Density ◽

Ring Analysis

Tree ring analysis is one of the most useful methods in volume and biomass estimation especially of the conifer trees. Ring width and ring density are important parameters in dendrochronological research. The present research was carried out with the aim of estimating the radial and volumetric growth of the Japanese Cypress trees (Chamaecyperis obstusa and C. pisifera). Destructive method was used while collecting the wood samples from the selected trees. Ring width and ring density were measured using soft X-ray densitometry method using micro-densitometer. Computer programme, developed by the Forestry and Forest Products Research Institute, Japan was used to analyze the ring with and ring density data. The average ring width of the Chamaecyparis spp. was found to be about 3.4 mm at the age of 30 years. However, two types of growth pattern were observed in the trees. Average radial growth was about 5% every year during the first 20 years of the tree age, whereas, the average radial growth was negative during the age of 20–30 years. Average density of the tree rings were increased by about 11% in each height of the trees starting from the ground. Similarly, the stem density decreased by about 3.4% annually along the radial direction from the pith.DOI: http://dx.doi.org/10.3126/banko.v22i2.9197Banko Janakari: A Journal of Forestry Information for NepalVol. 22, No. 2, 2012 November Page: 36-42 Uploaded date: 12/1/2013

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Analysis of carbon stock and radial growth of trees through tree ring analysis in pine forest of linga guthi in Bhaktapur, Nepal

Journal of Natural History Museum ◽

10.3126/jnhm.v30i0.27574 ◽

2018 ◽

Vol 30 ◽

pp. 248-255

Author(s):

Saphalta Chhukan ◽

Siddi Bir Karmacharya ◽

Sanu Raja Maharjan

Keyword(s):

Tree Ring ◽

Radial Growth ◽

Carbon Stock ◽

Plant Biomass ◽

Ring Width ◽

Measuring System ◽

Community Forest ◽

Pinus Roxburghii ◽

Tree Ring Analysis ◽

Ring Analysis

Forests are the integral to the global carbon cycle. These ecosystems sequester carbon in the plant biomass and in the soil. The study was carried out in Linga Guthi Community Forest of Bhaktapur to estimate carbon Stock and radial growth of Pinus roxburghii through tree ring analysis. A total of 32 circular plots of 250 m2 area were laid down randomly. Subplots were made for study of saplings, Litter, herbs and soil. For tree ring analysis, tree core samples were collected from different blocks of forest. Ring widths were measured using TSAP-Win Software attached to a LINTAB measuring system. For tree ring analysis, COFECHA and ARSTAN program were used. The average carbon stock of Linga Guthi Community Forest was 272.22±17.36 t/ha. Similarly, it has storage of 206.87± 4.47 t/ha AGTC, 41.37±2.19 t/ha BGTC, 23.814±1.00 t/ha SOC. The carbon sequestration rate of the forest was 2.22 Ct/ha/year. The average radial growth of pine trees in the forest was found to be 2.06 ± 0.13 mm/year. The maximum radial growth was 4.47 mm/yr. The oldest tree recorded in this forest was158 years with 58 cm diameter. However the average age of the forest was 98 years. The ring width chronology of 158 years was prepared for pine tree extending from 1854 to 2013 A.D.

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An interim report on the dendrochronology of Flag Fen and Fengate

Antiquity ◽

10.1017/s0003598x00081643 ◽

1992 ◽

Vol 66 (251) ◽

pp. 470-475 ◽

Cited By ~ 3

Author(s):

Janet Neve

Keyword(s):

Tree Ring ◽

Major Element ◽

Interim Report ◽

Tree Ring Analysis ◽

Full Implementation ◽

University Of Cambridge ◽

Ring Analysis ◽

The University ◽

English Heritage

The Flag Fen excavations of 1984 revealed a large number of oak timbers and it was immediately apparent that there was potential for dendrochronology. It was suggested that the work should initially comprise a major element in the Ph.D research of Nigel Holman, at the University of Cambridge. The direction of that research, however, moved away from Flag Fen, and it was not until 1987 that the Trust became aware of the situation. It was then decided, after much urgent consultation, that the best approach to the Flag Fen tree-ring analysis would be to undertake the study in-house (Pryor 1991: 111). The intention has been to keep costs low and (in view of the accumulated backlog) to produce as many measured samples as was reasonably possible. The dendrometer and computer facilities were initially provided by the Trust and the full implementation of the scheme has been supervised by the author. This work has been carried out under the supervision of the English Heritage funded Sheffield Dendrochronology Laboratory – to whom special thanks are due.

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Selected properties of Blue spruce wood from non-forest land

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun200957020037 ◽

2009 ◽

Vol 57 (2) ◽

pp. 37-44

Author(s):

Vladimír Gryc ◽

Hanuš Vavrčík ◽

Ondřej Kotalík

Keyword(s):

Compressive Strength ◽

Tree Ring ◽

Wood Density ◽

Ring Width ◽

Wood Properties ◽

Volumetric Shrinkage ◽

Tree Ring Width ◽

Tree Ring Analysis ◽

Blue Spruce ◽

Ring Analysis

The aim of this work was to carry out a tree-ring analysis, to determine density, shrinkage and compressive strength parallel to the grain of Blue spruce (Picea pungens Engelm.) wood. Results of this work were specific due to the non-forest origin of the sample material that was from two solitaire trees. Tree ring analysis (determination of tree ring width and portion of latewood) was carried out on the transverse section of a stem that was taken at height of 0.3 m from the tree base. Wood properties were tested according to Czech technical standards.Trees showed wide tree rings (5.65 mm) with a small portion of latewood (12.55 %). Oven dry wood density was 371.66 kg . m−3, overall volumetric shrinkage was 9.12 % and compressive strength parallel to the grain was 42.10 MPa. Due to the low age of trees results are valid for juvenile wood.Wood properties were examined along the stem radius. Tree ring width was increasing to the age of 12th year subsequently it was constant. Tree ring width was constant along the entire stem radius. Wood density, overall volumetric shrinkage and compressive strength parallel to the grain were increasing in the direction from pith to bark.

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TREE-RING ANALYSIS, A TOOL TO ASSIST IN DATING OF SUBFOSSIL FORESTS KILLED BY GEOLOGIC EVENTS—VICTIM TREE EXAMPLES FROM MOUNT RAINIER LAHARS AND THE BONNEVILLE LANDSLIDE, WASHINGTON AND OREGON, USA

10.1130/abs/2020am-359506 ◽

2020 ◽

Author(s):

Patrick Pringle ◽

Keyword(s):

Tree Ring ◽

Tree Ring Analysis ◽

Mount Rainier ◽

Ring Analysis

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A novel computer-aided tree-ring analysis software (CATS): oak earlywood vessel size reveals a clear spring heat sum response

Trees ◽

10.1007/s00468-017-1578-7 ◽

2017 ◽

Vol 31 (5) ◽

pp. 1683-1695 ◽

Cited By ~ 1

Author(s):

Alexander Land ◽

Matthias Wehr ◽

Kai-Uwe Roelfs ◽

Simon Epkes ◽

Daniel Reichle ◽

...

Keyword(s):

Tree Ring ◽

Analysis Software ◽

Tree Ring Analysis ◽

Vessel Size ◽

Computer Aided ◽

Earlywood Vessel ◽

Ring Analysis

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Influences of different detrending methods on identifying the climate signals from tree-ring analysis

Acta Ecologica Sinica ◽

10.5846/stxb202004170920 ◽

2021 ◽

Vol 41 (5) ◽

Author(s):

李雪，黄选瑞，张先亮 LI Xue

Keyword(s):

Tree Ring ◽

Tree Ring Analysis ◽

Climate Signals ◽

Ring Analysis

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The 443-Year Tree-Ring Chronology for the Scots Pine from Upper Silesia (Poland) as A Dating Tool and Climate Proxy

Geochronometria ◽

10.1515/geochr-2015-0005 ◽

2015 ◽

Vol 42 (1) ◽

Cited By ~ 5

Author(s):

Magdalena Opała

Keyword(s):

Tree Ring ◽

Scots Pine ◽

Meteorological Data ◽

Ring Width ◽

Tree Ring Chronology ◽

Series Length ◽

Upper Silesia ◽

Living Tree ◽

Absolute Dating ◽

The Mean

Abstract An annually resolved and absolutely dated ring-width chronology spanning 443 years has been constructed using the historical and living-tree Scots pine samples from the Upper Silesia, south of Poland. The constructed regional chronology, based on six object chronologies, covers the period of 1568-2010. It is composed of 178 wood samples with the mean correlation of 0.51, mean series length of 104 years and mean EPS of 0.85. In total, 65 extreme years were distinguished. Their inde-pendent verification, based on the historical and meteorological data, showed significant correlation with the exceptionally cold/mild winters as well as severe droughts. The comparison of the extreme years with the other Polish pine chronologies showed similarities in the years with the anomalous winter conditions. Some extreme years can be associated with the exceptional pluvial conditions; these years are common in the Central European hydroclimatic tree-ring records. The construction of this regional pine chronology enables for the absolute dating of many architectural monuments from investigated region. The application of the new chronology for the dating of local wood can support interpretations of changes in the environment of the Upper Silesian region. In the future it can also be used as the basis for climate reconstruction.

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