| Table 1. Main characteristics of cowberry coverage and stands in the PSP3000 data used in this study, by categories (a)–(g). Categories (a)–(e) pertain to forest land. For each category, number of stands (N), mean values and ranges of variation (min–max) of the characteristics are presented. Sites I-V and VII-VIII refer to different site quality classes (I = herb-rich forests, eutrophic mires, II = herb-rich heath forests, mesotrophic mires, III = mesic heath forests, meso-oligotrophic mires, IV = sub-xeric heath forests, oligotrophic mires, V = xeric heath forests, poor ombro-oligotrophic bogs, VII = rocky and sandy soils, VIII = summit and fell forests). | |||||||||
| Characteristic |
Mineral soils (a) N = 2074 |
Spruce mires | Pine mires | Site VIII | |||||
|
Transforming phase (b) N = 108 |
Transformed phase (c) N = 131 |
Transforming phase (d) N = 319 |
Transformed phase (e) N = 102 |
Poorly productive land 3 (f) N = 37 |
Waste land 3 (g) N = 30 |
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| Coverage of cowberry (%) | 7.0 (0–85) | 5.2 (0–45) | 3.6 (0–25) | 5.4 (0–50) | 8.0 (0–40) | 3.3 (0–20) | 1.1 (0–5) | ||
| on site I |
0.1 (0–2) [N = 34] |
--1 | --1 | --2 | --2 | -- | -- | ||
| on site II |
1.9 (0–30) [N = 408] |
2.2 (0–19) [N = 23] 1 |
1.5 (0–25) [N = 51] 1 |
--2 | --2 | -- | -- | ||
| on site III |
7.1 (0–65) [N = 957] |
5.3 (0–23) [N = 73] |
4.4 (0–25) [N = 74] |
2.9 (0–26) [N = 39] 2 |
3.4 (0–26) [N = 27] 2 |
-- | -- | ||
| on site IV |
11.1 (0–85) [N = 572] |
10.4 (2–45) [N = 12] |
12.8 (4–25) [N = 6] |
7.6 (0–50) [N = 155] |
10.4 (0–40) [N = 54] |
-- | -- | ||
| on site V |
6.7 (0–33) [N = 85] |
-- | -- |
3.4 (0–35) [N = 125] |
7.6 (0–30) [N = 21] |
-- | -- | ||
| on site VII |
4.6 (0–26) [N = 18] |
-- | -- | -- | -- | -- | -- | ||
| Altitude (m) | 132 (0–410) | 119 (10–270) | 96 (0–220) | 138 (20–310) | 112 (10–260) | 335 (100–540) | 434 (180–830) | ||
| Temperature sum (dd) |
1100 (602–1360) |
1112 (798–1349) |
1145 (908–1354) |
1056 (789–1334) |
1100 (852–1348) |
607 (531–663) |
549 (414–646) |
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| Stand age (a) | 61.2 (0–334) | 70.1 (0–164) | 57.9 (0–145) | 61.2 (0–175) | 65.8 (2–154) | -- | -- | ||
| Stand basal area (m2ha–1) | 16.0 (0–48) | 18.0 (0–45) | 19.5 (0–46) | 12.3 (0–33) | 16.7 (0–34) | -- | -- | ||
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1 In this study, site quality classes I and II of spruce mires were combined into one. 2 In this study, site quality classes I-III of pine mires were combined into one. 3 On poorly productive land and waste land, only a limited number of characteristics is recorded in the NFI. |
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