Decreasing stand density favors resistance, resilience, and recovery of Quercus petraea trees to a severe drought, particularly on dry sites

Schmitt, Anna; Trouvé, Raphaël; Seynave, Ingrid; Lebourgeois, François

doi:10.1007/s13595-020-00959-9

Annals of Forest Science

Table 2 Tree-ring characteristics of the 33 master chronologies sorted according to HBc (wet, mesic, and dry), RDIc (high, medium, and low), and SSc (dominant, codominant, and suppressed). Nt, number of sampled trees (6 to 10); Dia (std), mean (standard deviation) diameter under bark in 2012 (in cm); RW (std), mean (standard deviation) tree-ring width from 1997–2012 (in mm); age (std), mean age (standard deviation) in 2012 (years); MS, mean sensitivity; AC, first-order auto-correlation coefficient; rbt, mean inter-series correlation coefficient; EPS and SNR, expressed population signal and signal to noise ratio; Nr, number of rings (total = 4298). See text for details

From: Decreasing stand density favors resistance, resilience, and recovery of Quercus petraea trees to a severe drought, particularly on dry sites

RDIc/SSc	Nt	Dia (std)	RW (std)	Age (std)	MS	AC	Rbt	EPS	SNR	Nr	Nt	Dia (std)	RW (std)	Age (std)	MS	AC	Rbt	EPS	SNR	Nr
Wet (Parroy)											Mesic (Grosbois)
High
D	9	9.9 (1.6)	3.08 (1.03)	31 (1.8)	0.169	0.465	0.728	0.96	24	144	9	10.3 (3.3)	3.22 (1.37)	24 (3.2)	0.161	0.172	0.412	0.863	6.3	144
C	10	6.3 (1.5)	1.98 (0.81)	31 (3.0)	0.188	0.339	0.428	0.882	7.5	160	8	7.3 (1.6)	2.29 (0.77)	24 (1.8)	0.121	0.050	0.316	0.787	3.7	128
S	9	3.3 (0.61)	1.02 (0.61)	29 (2.7)	0.129	0.474	0.219	0.716	2.5	144	9	4.1 (1.0)	1.27 (0.66)	23 (1.7)	0.128	0.209	0.224	0.722	2.6	144
Medium
D	-		-	-	-	-	-	-	-	-	10	11.1 (3.7)	3.47 (1.45)	23 (3.5)	0.151	0.211	0.537	0.921	11.6	160
C	-		-	-	-	-	-	-	-	-	9	9.4 (1.8)	2.94 (1.06)	24 (1.7)	0.188	0.251	0.500	0.900	9.0	144
S	-		-	-	-	-	-	-	-	-	10	5.1 (1.9)	1.59 (0.7)	24 (2.0)	0.095	0.253	0.220	0.738	2.8	160
Low
D	6	21.2 (1.9)	6.62 (2.64)	32 (2.6)	0.276	0.396	0.772	0.953	20.3	96	6	17.4 (1.5)	5.44 (1.54)	20 (1.9)	0.197	− 0.039	0.615	0.906	9.6	96
C	7	17.4 (0.9)	5.42 (1.98)	32 (1.6)	0.287	0.375	0.811	0.968	30	112	7	16.1 (3.3)	5.02 (2.11)	22 (1.6)	0.229	− 0.177	0.526	0.886	7.8	112
S	6	16.7 (1.1)	5.21 (2.03)	30 (2.4)	0.293	0.298	0.721	0.94	15.5	96	7	13 (3.4)	4.08 (1.76)	20 (0.7)	0.184	0.113	0.432	0.842	5.3	112
Mesic (Réno-Valdieu)											Dry (Montrichard)
High
D	9	10.6 (2.7)	3.3 (1.05)	40 (1.9)	0.164	− 0.028	0.357	0.833	5	144	8	7.0 (0.9)	2.19 (0.61)	23 (1.4)	0.167	0.181	0.568	0.913	10.5	128
C	8	5.6 (1.4)	1.74 (0.65)	42 (2.1)	0.194	0.009	0.411	0.848	5.6	128	8	5.4 (0.5)	1.68 (0.46)	22 (1.7)	0.133	0.446	0.580	0.917	11.1	128
S	9	3.6 (1.5)	1.13 (0.68)	37 (4.0)	0.186	− 0.077	0.314	0.804	4.1	144	8	3.1 (0.9)	0.98 (0.44)	22 (0.7)	0.137	0.327	0.604	0.924	12.2	128
Medium
D	8	10.6 (1.6)	3.31 (1.05)	39 (2.4)	0.194	0.058	0.574	0.915	10.8	128	9	9.1 (3.8)	2.88 (1.39)	21 (2.7)	0.161	0.228	0.443	0.877	7.2	143
C	8	7.9 (1.1)	2.48 (0.92)	40 (2.3)	0.201	0.077	0.633	0.932	13.8	128	10	8.1 (1.2)	2.52 (0.79)	22 (1.5)	0.165	0.182	0.418	0.878	7.2	160
S	8	3.3 (2.3)	1.03 (0.8)	40 (1.8)	0.203	0.392	0.573	0.915	10.7	128	9	4.1 (0.9)	1.39 (0.59)	22 (2.8)	0.172	0.413	0.404	0.859	6.1	140
Low
D	8	15 (2.3)	4.69 (1.69)	38 (2.3)	0.184	0.023	0.552	0.908	9.9	128	7	16.9 (4.8)	5.26 (2.28)	23 (3.4)	0.151	0.086	0.334	0.778	3.5	112
C	9	12.7 (2.1)	3.98 (1.51)	37 (3.5)	0.186	− 0.054	0.563	0.921	11.6	144	6	14.5 (1.4)	4.59 (1.47)	23 (1.4)	0.153	− 0.149	0.288	0.708	2.4	95
S	8	10.5 (1.5)	3.29 (1.23)	36 (2.7)	0.205	0.014	0.655	0.938	15.2	128	7	11.1 (1.4)	3.47 (1.51)	21 (0.8)	0.164	0.125	0.242	0.691	2.2	112

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