Annual and spatial variabilities in the acorn production of Quercus mongolica

Table 6 Pearson correlations between oak-related and site-related variables

	Variable	No. of stems	Stand DBH^a	Trap DBH^a	Stand BA^a	Elevation	Slope	Soil depth	Soil A depth	Soil water content
Pearson correlation	Stand DBH^a	− 0.770
	Trap DBH^a	− 0.613	0.809
	Stand BA^a	0.280	0.287	0.137
	Elevation	− 0.415	0.517	0.409	0.189
	Slope	− 0.006	0.002	− 0.067	− 0.074	− 0.316
	Soil depth	− 0.048	0.063	0.068	0.060	− 0.179	0.080
	Soil A-layer depth	− 0.017	0.013	0.123	− 0.016	0.212	0.012	− 0.023
	Soil water content	− 0.255	0.110	0.185	− 0.119	0.225	− 0.198	− 0.018	0.247
	Soil OM^a	− 0.121	− 0.008	− 0.084	− 0.044	0.248	− 0.064	− 0.105	0.473	0.510
p value	Stand DBH^a	0.000
	Trap DBH^a	0.000	0.000
	Stand BA^a	0.080	0.073	0.401
	Elevation	0.008	0.001	0.009	0.243
	Slope	0.972	0.991	0.681	0.650	0.047
	Soil depth	0.768	0.700	0.675	0.714	0.269	0.625
	Soil A-layer depth	0.916	0.936	0.448	0.924	0.188	0.942	0.888
	Soil water content	0.113	0.500	0.252	0.463	0.164	0.221	0.910	0.125
	Soil OM^a	0.456	0.959	0.607	0.788	0.122	0.695	0.517	0.002	0.001

Stand DBH average oak DBH in stand, Trap DBH average oak DBH by trap, Stand BA oak basal area in stand, Soil OM soil organic matter,
^alog₁₀-transformed, p < 0.05 in bold

ISSN: 2288-1220