Table 1 Statistics of the structural equation modelling (SEM) for the effects of climate and traits on species longevity for angiosperms and gymnosperms
From: Contrasting pathways to tree longevity in gymnosperms and angiosperms
Direct | Indirect | Total effect | |
|---|---|---|---|
Angiosperms (n = 198 species) | |||
Mean annual temperature | −0.212 (p < 0.001) | 0.041 (p = 0.360) | −0.172 (p = 0.006) |
Precipitation of the driest quarter | 0.123 (p = 0.040) | 0.245 (p < 0.001) | 0.368 (p < 0.001) |
Precipitation ⇒ Growth ⇒ Longevity | 0.192 (p < 0.001) | ||
Precipitation ⇒ Max Tree height ⇒ Longevity | 0.086 (p < 0.001) | ||
Wood density | 0.152 (p = 0.013) | ||
Mean radial growth | −0.472 (p < 0.001) | ||
Maximum tree height | 0.278 (p < 0.001) | ||
Model statisticsa: χ2 = 5.50, p = 0.139, CFI = 0.989, SRMR = 0.036, RMSEA = 0.065. | |||
Gymnosperms (n = 128 species) | |||
Mean annual temperature | −0.088 (p = 0.240) | −0.284 (p < 0.001) | −0.373 (p < 0.001) |
Temperature ⇒ Growth ⇒ Longevity | −0.282 (p < 0.001) | ||
Precipitation of the driest quarter | −0.006 (p = 0.919) | 0.090 (p = 0.123) | 0.083 (p = 0.308) |
Wood density | 0.002 (p = 0.978) | ||
Mean radial growth | −0.593 (p < 0.001) | ||
Maximum tree height | 0.362 (p < 0.001) | ||
Model statisticsa: χ2 = 13.82, p = 0.000, CFI = 0.929, SRMR = 0.083, RMSEA = 0.168. | |||
