1. Forest related changes and GHG emissions
Turkey study tour
Eric Arets

2. Carbon sequestration in LULUCF

3. Reporting and accounting of LULUCF
CP2

4. Forest land Forest definition
forests are patches of land exceeding 0.5 ha with a minimum width of 30 m;
with tree crown cover of at least 20% and;
tree height at least 5 metres, or, if this is not the case, these thresholds are likely to be achieved at the particular site
This definition conforms to the FAO reporting
Includes areas normally forming part of the forest area, which are temporally unstocked as a result of human intervention or natural causes

5. Carbon stocks in forests

6. NFI data provide the basis

7. Changes in forest cover

8. Afforestation - Reforestation
UNFCCC
Reported under L-FL, until
new land-use changes occur
20 year transition: FL-FL
KP-LULUCF
Once AR, remains AR, unless D
Includes forests < 20 yr (L-FL) and FL-FL after 20 yrs AR

9. Deforestation UNFCCC Reported under FL-L, until
new land-use changes occur
20 year transition: L-L
KP-LULUCF
Once D, remains D
Includes emissions resulting from land-use changes after D

10. Forest Management UNFCCC: FL-FL
+ L-FL after 20 years transition (afforestation/reforestation)
- FL-L (deforestation)
KP-LULUCF
Forestland in 1990
Area only decreasing over time

11. Areas

12. Emissions in Forests

13. Questions?

14. Periodically repeated inventories:
1e forest statistics
2e forest statistics
3e forest statistics
4e forest statistics
HOSP
MFV
6e Dutch Forest Inventory

15. Waar? Sample plots: 1 per 100ha Same locations as MFV
Half of the plots permanent
Variable radius

16. Observations in the field
Terrain variables
(Owner), dominant tree species, age class, size class, management type, etc.
Tree variables
Angle and distance to midpoint (permanent sample points only)
Tree species
Diameter at breast height
Tree social status
Harvested/dead/rotten (for repeated measurements)
Sample trees
Height, shape, quality

18. Some numbers 87 plots access denied 116 plots could not be reached
3344 plots visited
3190 plots measured
1235 permanent sample points remeasured
About 120ha forest measured in total
85243 tree diameters
7934 tree heights

19. Dataset is publicly available as Access database
All plot- and tree measurements are online
Owner is listed as category (private/state forest service, etc.)
Database includes an update of the MFV data
Exact locations are not in the database due to privacy reasons, just the km2 gridcel where it is located

22. Eigendom

23. Management type

24. Mengvorm

25. Average standing volume
Standing dead: from 3.6 to 6.4 m3/ha
Lying dead: from 5.3 to 6.8 m3/ha

26. Increment

27. Harvest (about 50% of increment)

28. Age class distribution

30. Total volume by diameter class

31. Conclusions Coniferous share Harvest: 64%
Area, volume and increment: about 50%
Regeneration: 25%
Transition from conifers (Scots pine) towards broadleaves (oak/beech/birch)
Poplar is decreasing fast
Relatively much birch, red oak and only little pedunculate oak in the regeneration
About 40% of the permanent sample plots was not harvested
Standing volume has increased substantially
Increments seems to be decreasing

32. Ongoing work Analysis of harvest patterns of different owners
Why did owners not harvest on the permanent plots?
General questionnaire on aims and attitudes of owners at all plots
Development of diameter-class model at the plot level
Use of data in models and scenarios

33. Open questions
Regeneration: is the method OK, how to present it, what can be concluded?
It seems trees contain slightly more volume than 10 years ago at the same diameter. Is it statistically significant? Are they higher now at the same diameter?
Combination with remote sensing to do spatial extrapolation
Can the methods be improved and/or optimised before next round?

34. The best reasons not to measure a plot:
Nudist camping
Located on a prison area
Can only be reached with a helicopter
Can only be reached via a meadow with bulls
Forest with wild animals like zebra kangaroo etc.
Harnass needed against blackberries
Swamp >1,5 m deep

35. Questions?