From: Fire interval and post-fire climate effects on serotinous forest resilience
Variable | Definition | Mean | Median | Range |
---|---|---|---|---|
Fire interval | Time between stand-replacing fires in years. | 16 | 16 | 6–31 |
Pre-fire canopy seed bank | Open cones counted on pre-fire standing and fallen trees, measured in variable radius plots, scaled to the hectare and log-transformed (ln[cones ha−1]). | 9.08 | 9.37 | 5.01–11.75 |
Depth to bedrock | Soil depth to parent material measured in cm. | 91 | 88 | 69–123 |
Soil clay content | Average percent soil clay within all horizons above depth to bedrock. | 17 | 16 | 9–26 |
Post-fire CMD | Climatic moisture deficit (CMD), measured in mm as the difference between potential and actual evapotranspiration, calculated by averaging monthly CMD values for the post-fire water year (October 2018 to September 2019). | 538 | 556 | 350–822 |
Post-fire relative CMDa | Z-score of post-fire CMD relative to the 30-year normal CMD at a site. Negative values represent a cool/wet year relative to the normal period and positive values represent a warm/dry year relative to the normal period. | −0.93 | −0.99 | −1.48 to −0.02 |
Shrub cover | Percent cover of live shrubs 2 years post-fire, measured in 1 m2 quadrats. | 29 | 29 | 1–71 |
Topographic wetness index | Index representing potential moisture balance at a site. Low values reflect less potential moisture and high values reflect greater potential moisture. | 6.9 | 6.9 | 4.4–10.8 |
Topographic position index | Index representing each 30-m cell’s relative neighborhood topographic position. Low values reflect valley bottom positions and high values reflect ridgetop positions. | 0.18 | 0.22 | −0.78 to 1.78 |
Heat load index | Index representing the direct incident radiation at a site. Low values reflect low direct incident radiation and high values reflect high direct incident radiation. | 0.79 | 0.80 | 0.63–0.94 |