US EPA

4958159 

Journal Article 

The physiological condition of pine trees in the Prebaikalia (East Siberia) 

Mikhailova, TA 

2000 

Yes 

Forest Pathology
ISSN: 1437-4781 

30 

6 

345-359 

10.1046/j.1439-0329.2000.00221.x 

WOS:000166099900005 

The condition of Scots pine (Pinus sylvestris) forests polluted by complex industrial emissions in the Prebaikalia region (East Siberia) is described using an eco-physiological approach. Prebaikalia is one of the largest industrial areas of Russia. On 54 study plots the following needle parameters were measured: percentage of defoliation, protein nitrogen, nonprotein nitrogen, soluble carbohydrates, starch, aluminium, cadmium, calcium, copper, fluorine, iron, lead, magnesium, manganese, mercury, potassium, sodium, sulphur and zinc. The physiological condition of the pine tree stands was recorded on the basis of the protein nitrogen/nonprotein nitrogen ratio and the percentage of defoliation. Both parameters showed significant correlations with the accumulation of most pollutants. Five main damage classes were identified by a cluster analysis. The spatial distribution of these damage classes within the region is presented in a map.