Ecological Processes

Table 2 Correlation coefficients (R² values) describing the linear relationship between daily average sap flux density and daily average PAR, Ta and VPD (p < 0.001)

From: Effects of variable retention harvesting on canopy transpiration in a red pine plantation forest

	2018			2019			2020
	PAR	Ta	VPD	PAR	Ta	VPD	PAR	Ta	VPD
33A	0.77	0.51	0.72	0.73	0.37	0.66	0.34	0.65	0.65
33D	0.72	0.34	0.83	0.60	0.50	0.66	0.25	0.54	0.55
55A	0.74	0.39	0.83	0.71	0.42	0.74	0.61	0.40	0.60
55D	0.75	0.33	0.77	0.73	0.47	0.71	0.62	0.35	0.50
CN	0.77	0.44	0.64	0.65	0.41	0.69	0.53	0.43	0.61

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