KAZALCI OKOLJA

Key message
Neutral

The health condition of forests in Slovenia has been relatively stable in recent years, despite slight negative trends. In 2014, individual areas in Slovenia were affected by severe icing and later by, Bark beetles which is also reflected in the data collected at the national level. Among the most damaged tree species are spruce, oaks, fir, ash and home-grown chestnut. According to recent findings, annual fluctuations in estimates are primarily a combination of the consequences of changing weather conditions between years and other biotic and abiotic stressors.


Charts

Figure GZ01-1: Trend in average tree defoliation
Sources:

Source: Slovenian Forestry Institute, 2017

Show data
coniferous [%] deciduous [%] total [%]
1991 22.14 12.95 16.56
1993 22.46 15.68 19.59
1994 18.53 16.30 18.29
1995 26.86 18.07 21.42
1996 22.80 15.95 18.69
1997 24.69 20.49 22.21
1998 27.37 20.49 23.49
1999 28.65 21.87 25.62
2000 24.32 18.15 20.56
2001 25.90 21.46 24.62
2002 26.11 20.78 24.16
2003 25.13 20.75 23.56
2004 24.98 20.93 23.27
2005 24.99 22.21 23.47
2006 24.60 22.60 23.30
2007 24.56 25.87 25.37
2008 26.02 25.42 25.65
2009 26.36 25.86 26.05
2010 25.13 24.48 24.71
2011 25.95 23.81 25.45
2012 25.78 23.36 24.91
2013 26.14 24.46 25.87
2014 27.72 27.14 28.21
2015 29.69 26.30 28.08
2016 28.52 25.71 26.70
Figure GZ01-2: Trend in shares of damaged trees with defoliation above 25% (index of tree defoliation)
Sources:

Slovenian Forestry Institute, 2017

Show data
coniferous [%] deciduous [%] total [%]
1991 26.40 9.35 15.57
1993 25.28 12.45 18.87
1994 16.35 13.00 15.69
1995 37.75 17.63 24.71
1996 27.52 12.62 18.94
1997 31.06 20.34 27.03
1998 38.87 21.72 28.81
1999 41.97 22.77 30.62
2000 30.32 16.86 22.28
2001 36.11 24.53 30.41
2002 41.49 24.36 30.85
2003 36.73 23.76 29.27
2004 40.51 23.67 29.27
2005 35.08 28.49 30.59
2006 32.20 27.80 29.40
2007 36.60 35.70 35.70
2008 40.74 34.56 36.90
2009 39.07 32.78 35.42
2010 42.79 23.23 31.72
2011 37.87 27.62 31.40
2012 37.03 23.01 29.04
2013 34.31 28.47 30.87
2014 39.95 34.90 38.29
2015 44.33 32.75 37.81
2016 41.89 31.31 33.81
Figure GZ01-3: Share of trees by individual defoliation class in 2010
Sources:

Slovenian Forestry Institute, 2017

Show data

 

 

skupaj

listavci

iglavci

osutost manj kot 10 %

% drevja

18.94

18.09

20.41

osutost od 11 do 25 %

% drevja

31.53

34.68

26.10

osutost več kot 25 %

% drevja

49.53

47.23

53.49


Methodology

Date of data source summarization