Detecting changes in tree health and productivity of silver fir in Slovenia

Torelli, Niko; Shortle, Walter C.; Čufar, Katarina; Ferlin, Franc; Smith, Kevin T.

doi:10.1046/j.1439-0329.1999.00138.x

Cited by 23 publications

(25 citation statements)

References 10 publications

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“…salzmannii trees, subjected to xeric conditions in south-eastern Spain forests, were mostly negative over the past century (Linares and Tíscar 2010). Declining Slovenian silver firs showed also decreasing growth trends for about 50 years (Torelli et al 1999;. The growth curves of dead and living Scots pine trees at three different sites in the Swiss Valais started to diverge between 10 and 20 years prior to death (Bigler et al 2006).…”

Section: Discussionmentioning

confidence: 98%

Growth patterns and sensitivity to climate predict silver fir decline in the Spanish Pyrenees

Linares

Camarero

2011

Eur J Forest Res

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Patterns in radial growth have often been used to predict forest decline since they are regarded as indicators of the tree responses to long-term stressors. However, the sensitivity of tree growth to climate, as a proxy of the trees' adaptive capacity to short-term climatic stress, has received less attention. Here, we used retrospective tree-ring analyses to determine whether growth patterns and sensitivity to climate are related to Abies alba (silver fir) decline in the Spanish Pyrenees. We used regional climatic data to calculate normalised temperatures and drought indexes. Basal-area increment (BAI) was measured for declining (defoliation [50%) and non-declining (defoliation \50%) silver firs in four stands with contrasting decline levels. A dynamic factor analysis (DFA) was applied to test the hypothesis that declining and nondeclining trees have experienced different long-term growth trends. Growth sensitivity to climate was computed as the average change in BAI per unit of change in a given climate variable. Declining trees showed a negative growth trend during the last 20 years. Trees with lower relative BAI and negative BAI trends showed stronger growth sensitivity to climate and higher defoliation than trees with the opposite characteristics. Our findings underscore the idea that long-term climatic warming seems to be a major driving factor of growth decline in Pyrenean silver fir forests. Ongoing growth reduction and enhanced growth sensitivity to climate may promote vegetation shifts in these declining forests located near the xeric edge of the species distribution area.

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Section: Discussionmentioning

confidence: 98%

Growth patterns and sensitivity to climate predict silver fir decline in the Spanish Pyrenees

Linares

Camarero

2011

Eur J Forest Res

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“…8, 9) (e.g. Bauch, 1986;Fink, 1986;Schmitt et al, 2003;Schweingruber, 1986;Torelli et al, 1999). Reduced wood formation often occurs prior to visual symptoms of crown decline (Torelli et al, 1986(Torelli et al, , 1999, which highlights the usefulness of assessment of a tree's current mortality risk based on growth patterns and a derived statistical mortality model that clearly identifies trees at high risk of dying .…”

Section: Relationship Among the Number Of Cells In Xylem Phloem And mentioning

confidence: 99%

“…The trees belonged to a population of 269 mature trees monitored from 1987 to 2007. The health condition of the trees was assessed by determining the crown status index based on progressive needle loss and cambial electrical resistance (CER) (Torelli et al, 1999). Trees were assigned to 3 categories: A -trees with a full crown and productive cambium; B -trees with intermediate characteristics and C -trees with a sparse crown and suppressed cambium (Fig.…”

Section: Relationship Among the Number Of Cells In Xylem Phloem And mentioning

confidence: 99%

Cambial Cell Production and Structure of Xylem and Phloem as an Indicator of Tree Vitality: A Review

Gričar¹

2012

Sustainable Forest Management - Current Research

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“…Cambial ER (with a Shigometer) as an objective measure of the vitality of silver fir (Abies alba Mill. ), and a decrease in the radial ring growth could be detected as an increase in the cambial ER (Torelli et al 1999). There was a relationship between tree vigor and the fire history of trees (whether or not they had been burned in the past), and the ER was used as an index of the general metabolic activity of the Caribbean pine (Pinus caribaea Morelet) (Paysen et al 2006).…”

Section: Introductionmentioning

confidence: 98%

Detection of electric resistivity tomography and evaluation of the sapwood-heartwood demarcation in three Asia Gymnosperm species

Lin¹,

Chung²,

Yang³

et al. 2012

Silva Fenn.

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The proportions of sapwood and heartwood of trees have significant impacts on various uses. Electric resistivity tomography (ERT) and corresponding electrical resistance (ER) value maps were examined in Japanese cedar (Cryptomeria japonica D. Don), Taiwania (Taiwania cryptomerioides Hayata), and Luanta fir (Cunninghamia konishii Hayata) trees. The position of the sapwood-heartwood demarcation was measured on incremental cores from living trees and the corresponding ER of the sapwood-heartwood boundary was acquired from the ER map. A positive significant relationship was found between the maximum ER plus minimum ER values (ERmax + ERmin) and ER of the sapwood-heartwood demarcation from the tomographic data. The position of the sapwood-heartwood demarcation was determined by corresponding ER, and the critical ER can be established by the ERmax + ERmin value of the tomographic data. The results from this study indicate that ERT technique can be used to determine the position of the sapwood-heartwood boundary and can serve as a methodology in undamaged living trees of Gymnosperm species.

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Detecting changes in tree health and productivity of silver fir in Slovenia

Cited by 23 publications

References 10 publications

Growth patterns and sensitivity to climate predict silver fir decline in the Spanish Pyrenees

Growth patterns and sensitivity to climate predict silver fir decline in the Spanish Pyrenees

Cambial Cell Production and Structure of Xylem and Phloem as an Indicator of Tree Vitality: A Review

Detection of electric resistivity tomography and evaluation of the sapwood-heartwood demarcation in three Asia Gymnosperm species

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