Relationships between Structure, Composition, and Dynamics of the Pristine Northern Boreal Forest and Air Temperature, Precipitation, and Soil Texture in Quebec (Canada)

Table 2

Comparison of seasonal temperature, precipitation, and cumulative degree days during the two periods studied. Note: n.e. = not estimated.

Parameters	Time period 1	Time period 2	Change (%)	P-value
Temperature (^°C)
Winter	−17.5±0.09	−17.8±0.11	−1.7	𝑃=.077
Spring	4.9±0.07	5.2±0.08	5.9	𝑃=.052
Summer	11.5±0.07	12.1±0.07	5.3	𝑃≤.001
Autumn	−8.3±0.11	−7.0±0.10	15.6	𝑃≤.001
Total precipitation (mm)
Winter	162 ± 2.1	144 ± 1.3	−11.1	𝑃≤.001
Spring	254 ± 2.3	223 ± 2.3	−12.2	𝑃≤.001
Summer	334 ± 3.1	366 ± 2.2	9.5	𝑃≤.001
Autumn	212 ± 2.2	219 ± 1.8	3.2	𝑃=.018
Snow precipitation (mm)
Winter	150 ± 2.1	129 ± 1.2	−14.2	𝑃≤.001
Spring	35 ± 0.7	26 ± 0.4	−26.3	𝑃≤.001
Summer	n.e.	n.e.	n.e.	n.e.
Autumn	118 ± 2.1	104 ± 1.0	−11.9	𝑃≤.001