DATA DESCRIPTION

Dataset title: Target Tailored Forest Damage Inventory (TFDI) - Damage by bark beetle on Norway spruce in Götaland and Svealand 2020

Dataset identifier: https://doi.org/10.5878/hzzy-qm08

Contact: Cornelia Roberge, Department of Forest Resource Management, Swedish University of Agricultural Sciences
cornelia.roberge@slu.se

Report: Wulff, S. & Roberge, C (2020).  Nationell Riktad Skogsskadeinventering (NRS). Inventering av granbarkborreangrepp i Götaland och Svealand 2020. 
Arbetsrapport 521. Institutionen för skoglig resurshushållning, Sveriges lantbruksuniversitet.      
https://res.slu.se/id/publ/110255

Instruction fieldwork: Separate file (Only in Swedish)

Data description:
Collected, assessed variables and calculated variables

PLOTDATA
Plotno
Date – Date of inventory (YYYYMMDD)
NFI year – Year when the NFI last time inventoried the sample plot before this inventory
Tract – Tract number
Sample plot – Sample plot number
Sub sample plot – Sub sample plot number (0=one plot; >0 sub sample plotnumber)
County – 13 = Värmland; 14 = Örebro; 15 = Västmanland; 16 = Uppsala; 
17 = Stockholm; 18 = Södermanland; 19 = Östergötland;
20 = Västra Götaland (Skaraborg area); 21 = Västra Götaland (Dalsland area);
22 = Västra Götaland (Älvsborg south area); 23 = Jönköping; 24 = Kronoberg;  
25 = Kalmar; 26 = Västra Götaland (Bohuslän area); 27 = Halland;
28 = Skåne (Kristianstad area); 29 = Skåne (Malmöhus area); 30 = Blekinge;
Inventory team – Team number 91 – 97
Inventory – Is the plot measured? 1=Yes; 2=No - sample plot not found; 3= No - Not forestland, a real change in land use class; 4=No - Whole plot clear cut; 5=No - Other reason (give explanation); 
            6=No – No Norway spruces left on the sample plot; 7=Yes – But only a few remaining trees; 8=Yes – But with a new stand edge (season 0 – 2) stand edge within 25 m
Plot area proportion – Current proportion of sample plot (percent)
Plot area – Area of sample plot (m2)
Proportion of Norway spruce – Proportion of Norway spruce at plot level in tenths 
Maturity class - Maturity class (see NFI instructions for description) 
Edge - Distance from plot center to stand edge or gap in the forest (0=in the edge; 5=1-5 m; 10=6-10 m; 15=11-15 m; 20=16-20 m; 25=21-25 m; 26=>25 m; NULL=Missing data)
Edge time – Time when an stand edge within 25 m occurred (0=current season; 
1=last year season; 2=season 2; 5=season 3-5; 10=older than 5 season; 99=no edge; NULL=Missing data) 
A season is from spring budding one year to the budding the next year
Infested trees season 0 – Are there infested trees from season 0? (1=yes; 0=no)
Number of infested trees season 0 – Number of infested trees from season 0
Logging – Harvesting method (11 = Clear cut; 21 = Thinning; 43 = Other type of felling)
(NULL=No logging within 5 years) See NFI instructions for description
Sanitation – Logging carried out as sanitation of infested trees (0=no; 1=yes; NULL=Missing data) 
See NFI instructions for description 
Harvest timing – Time when the logging was carried out (0=current season; 1=last year season; 2=season 2; 5=season 3-5; NULL=Missing data) A season is from spring budding one year to the budding the next year
Measured stumps – Stumps measured (0 = No stumps from season 0; 
1 = Measured stumps only within plot area with 10 m radius; 2 = Measured stumps from the whole plot area; NULL=Missing data) A season is from spring budding one year to the budding the next year
Wind-felled trees fresh – Number of wind thrown trees with fresh inner bark 
Wind-felled trees season 1 – Number of wind thrown trees from season 1 
Wind-felled trees season older – Are there wind thrown trees older than season 1 (1=yes; 0=no)
Number of infested trees season 1 – Number of infested trees from season 1
Infested trees season older – Are there infested trees older than season 1 (1=yes; 0=no)
GPS-East Scrambled (SWEREF99, scrambled +/- 200 - 800 m) 
GPS-North Scrambled (SWEREF99, scrambled +/- 200 - 800 m)
Other info – Other information free text in Swedish


TREEDATA
Plotno
Treeno
Within 10m – Within plot with 10 m radius (1=yes; 0=no)
Dead – Dead tree (1=yes; 0=no)
Position – 1=Standing tree; 2=Wind felled tree; 3= Stump
Diameter – Diameter at breast height (mm)
Diameter measurement – Diameter measured (Brh = Breast height; Stubb = Stump height) 
See NFI instructions for description 
Bark beetle – Damage by bark beetle species. GBB=European spruce bark beetle (Ips thypographus); 
Season – Damage season. A season is from spring budding one year to the budding the next year. 0=present season
Including stump – Wind felled tree include stump (1=yes; 0=no) (NULL=Missing data)
Full length – Full length on standing tree and wind felled tree (1=yes; 0=no) (NULL=Missing data)
Length – NULL if full length = 1; If full length = 0 than measured tree length (dm)
Top diameter – NULL if full length =1; If full length = 0 than measured diameter (mm)
Edge - Distance from tree to stand edge or gap in the forest (0=in the edge; 5=1-5 m; 10=6-10 m; 15=11-15 m; 20=16-20 m; 25=21-25 m; 26=>25 m) (NULL=Missing data)
Volume – Volume in m3 (Cubic meters standing volume) 
To calculate the volume of measured trees, wind felled trees and harvested trees (for which stumps were measured), sample trees and stumps from NFI were used along with model relationships to predict the heights of the trees (Ollas, 1980). Näslund´s smaller volume functions for southern Sweden were used to predict the volume of the trees. (Equations 6,7,8; Näslund, M. (1947). Functions and tables for the cubic measurement of standing trees. Retrieved from the Swedish University of Agricultural Sciences:
https://pub.epsilon.slu.se/9900/1/medd_statens_skogsforskningsinst_036_03.pdf
Ollas, R. 1980. Nya utbytesfunktioner för träd och bestånd. Forskningsstiftelsen Skogsarbeten, Ekonomi nr 5.
Other info – Other information free text in Swedish