Figure 1.
Figure 2.
Figure 3.
Climatic variable, climatic and bioclimatic indices, and quotients that describe study sites for the period of 1901–2020
| Nr. Crt | Climatic variable, Index/quotient | Epureni Forest | Valea Fagilor Forest | Snagov Forest | Stârmina Forest | Gogoșu Forest |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 1 | AMT (°C) | 9.9 | 10.5 | 10.7 | 10.8 | 10.8 |
| 2 | MTWM (°C) | 21.3 | 21.7 | 21.9 | 21.5 | 21.6 |
| 3 | MTCM (°C) | −3.1 | −1.9 | −2.4 | −0.8 | −1.7 |
| 4 | ART (°C) | 24.4 | 23.6 | 24.3 | 22.3 | 23.3 |
| 5 | AP (mm) | 524.7 | 479.2 | 586 | 614 | 613.6 |
| 6 | MJJA(°C) | 26.5 | 26.6 | 27.7 | 26.8 | 26.9 |
| 7 | PJJA (mm) | 189.4 | 153 | 201.3 | 190.6 | 192.4 |
| 8 | MTVS (°C) | 17.5 | 17.7 | 18.1 | 17.8 | 17.9 |
| 9 | APVS (mm) | 334.2 | 278.8 | 362.1 | 354.1 | 354.8 |
| 10 | DD<0 | 356.7 | 276 | 294.7 | 215.6 | 256.3 |
| 11 | DD>5 | 2602.4 | 2673.8 | 2756.3 | 2698.9 | 2724.9 |
| 12 | DD<18 | 3234.3 | 3076.1 | 3029.6 | 2932 | 2965.2 |
| 13 | DD>18 | 389.8 | 421.7 | 448 | 388.5 | 410.5 |
| 14 | NFFD | 254.2 | 264.9 | 258.6 | 273.2 | 269.3 |
| 15 | FFP | 193.7 | 202.9 | 195.4 | 206.3 | 203.7 |
| 16 | bFFP | 100 | 95.9 | 99.4 | 93.4 | 94.6 |
| 17 | eFFP | 293.8 | 298.9 | 294.7 | 299.7 | 298.7 |
| 18 | Eref | 785.7 | 790.9 | 866.9 | 844.9 | 844.1 |
| 19 | CMD | 378.4 | 423.8 | 404.6 | 375.4 | 375.65 |
| 20 | Q | 56.52 | 51.9 | 59.9 | 67.7 | 65.5 |
| 21 | SDI | 7.14 | 5.75 | 7.3 | 7.1 | 7.15 |
| 22 | WI | 80.7 | 83.4 | 85.4 | 83.9 | 84.1 |
| 23 | ABT | 10.4 | 10.7 | 10.9 | 10.9 | 10.9 |
| 24 | CI | −21.6 | −17.8 | −17.6 | −14.3 | −15.7 |
| 25 | K | 37.21 | 38.8 | 36.2 | 33.7 | 36.2 |
| 26 | R | 1.75 | 1.4 | 1.6 | 1.36 | 1.37 |
| 27 | *EQ | 40.6 | 45.3 | 37.4 | 35 | 35.2 |
| 28 | * IdM | 26.4 | 23.4 | 28.3 | 29.5 | 29.5 |
| 29 | IdMVS | 24.4 | 19.3 | 25.6 | 25.8 | 25.7 |
| 30 | I | 53 | 45.6 | 54.8 | 56.9 | 56.8 |
| 31 | *FAI | 6.82 | 8.63 | 6.46 | 6.68 | 6.69 |
| 32 | QBTI | 14.85 | 12.76 | 13.8 | 13.7 | 13.6 |
| 33 | *cot G | 0.8166 | 0.74 | 1.074 | 0.96 | 0.9 |
| 34 | *MT | 19.5 | 19.7 | 20.02 | 19.5 | 19.7 |
| 35 | CSOi | 12.7 | 10.3 | 13.6 | 13.3 | 13.2 |
Structural parameters of study forests
| Plots–forest/parameters | 67 Valea Fagilor | 68 Valea Fagilor | 69A Valea Fagilor | 8C Epureni | 13B Epureni | 15C Epureni | 99B Snagov | 16C Gogoşu | 18B Gogoşu | 14J Gogoşu | 20A Stârmina | 21A Stârmina | 22A Stârmina |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Surface (ha) | 23.27 | 18.84 | 35.61 | 1.16 | 3.91 | 3.79 | 1.3 | 14.58 | 8.05 | 0.97 | 15.15 | 29.11 | 18.14 |
| Altitude (m) | 225 | 230 | 230 | 230 | 250 | 210 | 100 | 230 | 210 | 240 | 40–170 | 70–170 | 50 |
| Exposure | N | S-E | N | N | N-E | N-E | N-E | N-E | N-E | N-V | N-V (slope 30○) | V (slope 30○) | V |
| Cod Sol type | 3101 | 3101 | 3101 | 3101 | 3101 | 2101 | 2101 | 2201 | 2201 | 2212 | 2103 | 2115 | 2115 |
| Participation of beech % | 10 | 10 | 10 | 40 | 40 | 10 | 40 | 10 | 20 | 10 | 20 | 10 | 10 |
| Average age (years) | 140 | 140 | 140 | 120 | 120 | 110 | 170 | 70 | 80 | 110 | 150 | 150 | 150 |
| Average DHB (cm) | 52 | 52 | 48 | 46 | 46 | 46 | 68 | 34 | 40 | 34 | 50 | 50 | 56 |
| Average height (m) | 24 | 25 | 24 | h31 | 32 | 31 | 24 | 28 | 24 | 23 | 27 | 28 | 24 |
| Flora type | Asarum‒Stellaria | Asarum‒Stellaria | Asarum‒Stellaria | Asarum‒Stellaria | Asarum‒Stellaria | Carex‒Poa pratensis | Carex‒Poa pratensis | Carex‒Poa pratensis | Carex‒Poa pratensis | Festuca pseudovina | Carex‒Poa pratensis | Carex‒Poa pratensis | Carex‒Poa pratensis |