Van Bogaert, Rik; Jonasson, Christer; De Dapper, Morgan; Callaghan, Terry V (2010): (Table 3a) Assumed sexual regeneration events in aspen (Populus tremula) related to climatic and biotic factors for the period 1919–2009 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.841216, In supplement to: Van Bogaert, R et al. (2010): Range expansion of thermophilic aspen (Populus tremula L.) in the swedish Subarctic. Arctic, Antarctic, and Alpine Research, 42(3), 362-375, https://doi.org/10.1657/1938-4246-42.3.362
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Coverage:
Latitude: 68.400000 * Longitude: 18.900000
Date/Time Start: 1919-01-01T00:00:00 * Date/Time End: 2003-01-01T00:00:00
Minimum Elevation: 341.0 m * Maximum Elevation: 700.0 m
Event(s):
Comment:
The annual number of stands (total n = 21) assumed to have established from seed was related to: (1) summer temperature of the year preceding germination, possibly affecting seed set (mean = 10.0 °C, SE = 0.14); (2) annual precipitation of the current year, possibly affecting germination and seedling survival (mean = 314 mm, SE = 5.99); (3) moth damage to birch during the year of germination, possibly affecting aspen seed bed availability and seedling survival; high positive values point to increased damage (mean = -0.03 negative birch-minus-pine indices, SE = 0.03).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Zone | Zone | Van Bogaert, Rik | |||
| 2 | Elevation, minimum | Elev min | m a.s.l. | Van Bogaert, Rik | ||
| 3 | Elevation, maximum | Elev max | m a.s.l. | Van Bogaert, Rik | ||
| 4 | DATE/TIME | Date/Time | Geocode | |||
| 5 | Number | No | Van Bogaert, Rik | of aspen stands established | ||
| 6 | Temperature, difference | delta T | °C | Van Bogaert, Rik | June-July temperature anomaly of previous year | |
| 7 | Precipitation, difference | Precip diff | mm | Van Bogaert, Rik | annual precipitation anomaly of current year | |
| 8 | Index | Index | Van Bogaert, Rik | moth damage anomaly to birch of current year (negative birch-minus-pine indices) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
63 data points
Data
| 1 Zone | 2 Elev min [m a.s.l.] | 3 Elev max [m a.s.l.] | 4 Date/Time | 5 No | 6 delta T [°C] | 7 Precip diff [mm] | 8 Index |
|---|---|---|---|---|---|---|---|
| subalpine | 340 | 500 | 1919 | 3 | 1.1 | 19 | 0.66 |
| subalpine | 340 | 500 | 1948 | 3 | 1.7 | 18 | 0.40 |
| subalpine | 340 | 500 | 1954 | 7 | 2.8 | 32 | 0.85 |
| subalpine | 340 | 500 | 1961 | 1 | 1.6 | 37 | -0.01 |
| subalpine | 340 | 500 | 1973 | 1 | 2.3 | 42 | 0.02 |
| subalpine | 340 | 500 | 2003 | 1 | 2.2 | 81 | 0.42 |
| treeline | 600 | 700 | 1938 | 2 | 2.5 | 45 | -0.43 |
| treeline | 600 | 700 | 1948 | 1 | 1.7 | 18 | 0.40 |
| treeline | 600 | 700 | 1973 | 2 | 2.3 | 42 | 0.02 |