KAZALCI OKOLJA

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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



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