Vulnerability to pine sawfly damage decreases with site fertility but the opposite is true with Scleroderris canker damage; results from Finnish ICP Forests and NFI data

Table. 1 Types of data and number of plots used in this study.

Data	Observation level	Regional coverage	Number of plots/year (min–max)	Total number of plots	Years
ICP Forest Level 1	Tree level	Whole Finland	242–455	7416^a	1986–2008
Finnish NFI8	Plot level	Annually changing regions	665–7309	36,082	1986–1994
Finnish NFI9	Plot level	Annually changing regions	2971–5227	34,550	1996–2003
Finnish NFI10	Plot level	Whole Finland	3217–6019	28,503	2004–2008

Please note that only Scots pine trees and/or Scots pine-dominated plot center points were used in this study. For ICP Forests Level 1 data, the total number of plot years is the number of times the plots were visited during the years
NFI National Forest Inventory
^aPlot years

ISSN: 1297-966X