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Table I
Characteristics of Second Spanish National Forest Inventory (SNFI-II) plots and sample trees used to fit the mortality model according to the biogeoclimatic strata (Elena Roselló, 1997).
| Stratum | ||||||||
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| 1 | 2 | 3 | 4 | 5 | 6 | All | ||
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| Plots/trees | 36/760 | 20/291 | 143/3053 | 12/261 | 5/85 | 3/55 | 219/4505 | |
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| Plots with mortality/dead trees | 13/34 | 4/18 | 33/91 | 5/14 | 1/3 | 0/0 | 56/160 | |
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| Individual tree characteristics | ||||||||
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| dbh (cm) | Average | 19.0 | 19.7 | 18.6 | 21.4 | 17.0 | 15.0 | 18.8 |
| SD | 10.7 | 12.8 | 12.9 | 12.0 | 10.1 | 4.2 | 12.4 | |
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| h (m) | Average | 10.0 | 8.2 | 9.3 | 11.4 | 9.2 | 9.5 | 9.5 |
| SD | 3.5 | 2.1 | 2.9 | 4.2 | 2.9 | 2.5 | 3.1 | |
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| Stand characteristics | ||||||||
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| N (trees/ha) | Average | 1262.4 | 822.6 | 1369.5 | 1100.6 | 951.0 | 1002.6 | 1288.2 |
| SD | 748.0 | 499.0 | 791.7 | 456.7 | 468.0 | 307.2 | 759.0 | |
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| Dm (cm) | Average | 15.7 | 15.4 | 14.7 | 15.8 | 15.2 | 12.8 | 15.0 |
| SD | 6.6 | 6.0 | 7.1 | 4.2 | 6.5 | 0.7 | 6.8 | |
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| DG (cm) | Average | 16.6 | 16.6 | 15.7 | 17.1 | 15.7 | 13.4 | 16.0 |
| SD | 7.1 | 6.8 | 7.6 | 5.0 | 7.0 | 0.8 | 7.3 | |
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| Hm (m) | Average | 8.9 | 7.4 | 8.5 | 9.5 | 8.9 | 8.6 | 8.6 |
| SD | 2.6 | 1.2 | 2.1 | 2.3 | 2.2 | 1.8 | 2.2 | |
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| Ho (m) | Average | 11.2 | 9.4 | 10.6 | 13.4 | 10.1 | 11.0 | 10.7 |
| SD | 2.9 | 1.8 | 2.6 | 3.1 | 2.2 | 2.2 | 2.7 | |
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| BA (m2/ha) | Average | 20.2 | 13.7 | 20.7 | 22.1 | 13.2 | 14.2 | 20.0 |
| SD | 6.9 | 5.4 | 9.5 | 6.2 | 2.2 | 4.9 | 8.9 | |
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| HSI | Average | 35.3 | 47.1 | 35.6 | 30.3 | 39.5 | 36.4 | 36.4 |
| SD | 12.5 | 14.9 | 13.5 | 14.5 | 10.7 | 12.8 | 13.8 | |
dbh: Breast-height diameter; h: total height. N: density; Dm: mean diameter; DG: mean square diameter; Hm: mean height; Ho: dominant height; BA: basal area. HSI: Hart index. SD: standard deviation.