Persistent Link:
http://hdl.handle.net/10150/259791
Title:
James Louis Giddings, 1909-1964
Issue Date:
Nov-1965
Rights:
Copyright © Tree-Ring Society. All rights reserved.
Collection Information:
This item is part of the Tree-Ring Research (formerly Tree-Ring Bulletin) archive. It was digitized from a physical copy provided by the Laboratory of Tree-Ring research at The University of Arizona. For more information about this peer-reviewed scholarly journal, please email the Editor of Tree-Ring Research at editor@treeringsociety.org.
Publisher:
Tree-Ring Society
Journal:
Tree-Ring Bulletin
Citation:
Anonymous. 1965. James Louis Giddings, 1909-1964 (obituary). Tree-Ring Bulletin 27(1-2):2.
Abstract:
Tree -ring characteristics are studied within and among stems of four Pinus ponderosa Laws. located at several semiarid sites in northern Arizona. Analyses are made of changes associated with certain physiological, height, and age gradients within the tree. Rings are grouped into twenty or forty-year intervals, are classified in four different arrangements, and the characteristics for the intervals are averaged and plotted to represent the gradients within the tree stem. Tree-rings are widest near the base and central portions of the stem. Ring width decreases with increasing age of the cambium, with increasing height within the young stem, with decreasing terminal growth, and with increasing environmental stress. Double (false or intra-annual) rings occur most frequently in the wide rings near the base and in the younger portions of the stem, or in the upper stem and branches of older trees. The frequency of rings which are locally absent (partial rings) is inversely related to ring width, and directly related to the potentiality for water stress conditions in the site or within the tree. Correlations among the year-to-year ring-width patterns throughout the tree generally increase with increasing tree age and frequency of water stress. They are high within the lower and central bole portions of older trees, but in the upper stem, in lateral branches, and in trees on the most extreme sites correlations among ring-width patterns are somewhat lower. Relative variability in widths of adjacent rings increases with decreasing ring width, increasing age, increasing height in the stem, and increasing environmental stress. First order serial correlation is frequently highest in older trees on semiarid sites. Many of these changes in ring characteristics within the tree are attributed to specific gradients or changes in auxin, food, and water supplies. A wide sampling of annual rings from the base of many semiarid site trees appears more appropriate for evaluating past fluctuations in climatic factors than an intensive sampling of rings at several heights in only a few trees.
Keywords:
Dendrochronology; Tree Rings
ISSN:
0041-2198
Additional Links:
http://www.treeringsociety.org

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleJames Louis Giddings, 1909-1964en_US
dc.date.issued1965-11-
dc.rightsCopyright © Tree-Ring Society. All rights reserved.en_US
dc.description.collectioninformationThis item is part of the Tree-Ring Research (formerly Tree-Ring Bulletin) archive. It was digitized from a physical copy provided by the Laboratory of Tree-Ring research at The University of Arizona. For more information about this peer-reviewed scholarly journal, please email the Editor of Tree-Ring Research at editor@treeringsociety.org.en_US
dc.publisherTree-Ring Societyen_US
dc.identifier.journalTree-Ring Bulletinen_US
dc.identifier.citationAnonymous. 1965. James Louis Giddings, 1909-1964 (obituary). Tree-Ring Bulletin 27(1-2):2.en_US
dc.description.abstractTree -ring characteristics are studied within and among stems of four Pinus ponderosa Laws. located at several semiarid sites in northern Arizona. Analyses are made of changes associated with certain physiological, height, and age gradients within the tree. Rings are grouped into twenty or forty-year intervals, are classified in four different arrangements, and the characteristics for the intervals are averaged and plotted to represent the gradients within the tree stem. Tree-rings are widest near the base and central portions of the stem. Ring width decreases with increasing age of the cambium, with increasing height within the young stem, with decreasing terminal growth, and with increasing environmental stress. Double (false or intra-annual) rings occur most frequently in the wide rings near the base and in the younger portions of the stem, or in the upper stem and branches of older trees. The frequency of rings which are locally absent (partial rings) is inversely related to ring width, and directly related to the potentiality for water stress conditions in the site or within the tree. Correlations among the year-to-year ring-width patterns throughout the tree generally increase with increasing tree age and frequency of water stress. They are high within the lower and central bole portions of older trees, but in the upper stem, in lateral branches, and in trees on the most extreme sites correlations among ring-width patterns are somewhat lower. Relative variability in widths of adjacent rings increases with decreasing ring width, increasing age, increasing height in the stem, and increasing environmental stress. First order serial correlation is frequently highest in older trees on semiarid sites. Many of these changes in ring characteristics within the tree are attributed to specific gradients or changes in auxin, food, and water supplies. A wide sampling of annual rings from the base of many semiarid site trees appears more appropriate for evaluating past fluctuations in climatic factors than an intensive sampling of rings at several heights in only a few trees.en_US
dc.subjectDendrochronologyen_US
dc.subjectTree Ringsen_US
dc.identifier.citationAnonymous. 1965. James Louis Giddings, 1909-1964 (obituary). Tree-Ring Bulletin 27(1-2):2.en_US
dc.identifier.issn0041-2198-
dc.identifier.urihttp://hdl.handle.net/10150/259791-
dc.identifier.journalTree-Ring Bulletinen_US
dc.typeArticleen_US
dc.relation.urlhttp://www.treeringsociety.orgen_US
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