Home > Research > Publications & Outputs > Prediction of the probability of forest decline...
View graph of relations

Prediction of the probability of forest decline damage to Norway spruce using three simple site-independent diagnostic parameters

Research output: Contribution to journalJournal articlepeer-review

<mark>Journal publication date</mark>12/1988
<mark>Journal</mark>New Phytologist
Issue number4
Number of pages10
Pages (from-to)525-534
Publication StatusPublished
<mark>Original language</mark>English


Survey data for Norway spruce (Picea abies I.) trees at 12 different forest sites across Europe have been analysed. Three variables (dry weight/fresh weight ratio differences between current and two-year-old needles, ethylene emissions and violaxanthin/antheraxanthin ratios) were found which together show a significant relationship to tree damage in areas affected by forest decline and which are independent of site effects (P < 0.001). Results are also presented that support the contention that atmospheric pollution, especially tropospheric ozone, is the major cause of this problem. After a four-year fumigation experiment, 12-year-old Norway spruce trees showed similar cellular changes as those found in the 30-to 40-year-old trees of the survey affected by forest decline. In the fumigation experiment, these changes were most pronounced in those plants exposed to a combination of treatments including ozone, sulphur dioxide and acid rain. The pollutant concentrations used in the four-year study were representative of those experienced by trees growing in affected areas.