NDLI: Temporal Changes in the State of a Pine Stand in a Bog Affected by Air Pollution in Northeast Estonia

Content Provider	Springer Nature Link
Author	Pensa, Margus Liblik, Valdo Jalkanen, Risto
Copyright Year	2004
Abstract	We used the needle trace method to investigate changes in the state of a Scots pine (Pinus sylvestris L.) stand in a bog (Voorepera) in the north-eastern part of Estonia, the most polluted area of the country. Additionally, we chose six sampling sites in other parts of Northeast Estonia (polluted area) and eight sites in southern Estonia (unpolluted area) to compare the state of pine stands in different bogs. During the period of 1964–1997, the radial growth had increased from 0.27 to 2.16 mm yr$^{−1}$ and the annual shoot length from 0.10 to 0.28 m in Voorepera. Mean values of the period (1.13 mm yr$^{−1}$ and 0.26 m, respectively) were two and four times higher in Voorepera than the average of the other bogs (0.5 mm yr$^{−1}$ and 0.06 m, respectively). Maximum needle age fluctuated between three and five growing seasons in Voorepera, the mean (four growing seasons) was similar to that of other bogs (four growing seasons). Except radial growth, which was 0.6 mm yr$^{−1}$ in the polluted area and 0.4 mm yr$^{−1}$ in the unpolluted area, other indices of trees' health (shoot growth, needle age, nitrogen concentration in needles) and substrate conditions (water pH and N concentration) did not show clear differences between polluted and unpolluted areas. We conclude that air pollution from oil shale industry (thermal power plant and chemical factories) enhances the growth of pines in bogs, which can induce drastic changes in these ecosystems. However, the effect is currently obvious only in the vicinity of pollution sources.
Starting Page	87
Ending Page	99
Page Count	13
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	159
Issue Number	1
e-ISSN	15732932
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrogeology Atmospheric Protection/Air Quality Control/Air Pollution
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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