Potential distributions of seven sympatric sclerophyllous oak species in Southwest China depend on climatic, non-climatic, and independent spatial drivers

Table 4 Pearson correlation coefficients for 19 bioclimatic variables based on layers within the range of the Hengduan Mountains are shown. The nine variables highlighted in bold indicated that their average contributions to the initial ensemble ENMs for seven studied species exceeded 5%. Uncorrelated variables highlighted in italics were represented for climatic predictors and were ultimately selected to simulate the potential distributions of seven oak species

	Bio1	Bio2	Bio3	Bio4	Bio5	Bio6	Bio7	Bio8	Bio9	Bio10	Bio11	Bio12	Bio13	Bio14	Bio1 5	Bio16	Bio17	Bio18	Bio1 9
Bio1	1.00
Bio2	− 0.59	1.00
Bio3	0.03	0.00	1.00
Bio4	− 0.75	0.75	− 0.05	1.00
Bio5	0.95	− 0.39	0.02	− 0.51	1.00
Bio6	0.98	− 0.73	0.03	− 0.84	0.87	1.00
Bio7	− 0.72	0.89	− 0.04	0.96	− 0.47	− 0.84	1.00
Bio8	0.99	− 0.54	0.03	− 0.66	0.98	0.95	− 0.64	1.00
Bio9	0.99	− 0.65	0.04	− 0.82	0.90	0.99	− 0.80	0.97	1.00
Bio10	0.99	− 0.53	0.03	− 0.66	0.98	0.95	− 0.63	1.00	0.96	1.00
Bio11	0.99	− 0.65	0.04	− 0.83	0.90	0.99	− 0.79	0.97	1.00	0.97	1.00
Bio12	0.65	− 0.67	0.02	− 0.74	0.47	0.68	− 0.70	0.59	0.66	0.58	0.68	1.00
Bio13	0.61	− 0.67	0.03	− 0.82	0.39	0.67	− 0.79	0.54	0.65	0.53	0.67	0.93	1.00
Bio14	0.59	− 0.66	0.01	− 0.63	0.45	0.63	− 0.65	0.55	0.62	0.55	0.62	0.77	0.61	1.00
Bio15	− 0.24	0.30	0.03	0.05	− 0.29	− 0.22	0.08	− 0.25	− 0.20	− 0.26	− 0.21	− 0.34	0.00	− 0.58	1.00
Bio16	0.63	− 0.66	0.03	− 0.80	0.41	0.67	− 0.76	0.55	0.65	0.55	0.67	0.96	0.99	0.66	− 0.07	1.00
Bio17	0.57	− 0.63	0.02	− 0.62	0.42	0.61	− 0.63	0.52	0.59	0.52	0.60	0.76	0.60	0.98	− 0.62	0.64	1.00
Bio18	0.62	− 0.65	0.03	− 0.80	0.40	0.67	− 0.76	0.55	0.65	0.54	0.67	0.96	0.99	0.65	− 0.06	1.00	0.63	1.00
Bio19	0.56	− 0.63	0.01	− 0.61	0.42	0.61	− 0.63	0.52	0.59	0.52	0.59	0.75	0.59	0.97	− 0.62	0.63	0.99	0.62	1.00

Bio1: annual mean temperature; Bio2: mean diurnal range (mean of monthly (max temp–min temp)); Bio3: isothermality (Bio2/Bio7) (× 100); Bio4: temperature seasonality (standard deviation × 100); Bio5: max temperature of warmest month; Bio6: min temperature of coldest month; Bio7: temperature annual range (Bio5–Bio6); Bio8: mean temperature of wettest quarter; Bio9: mean temperature of driest quarter; Bio10: mean temperature of warmest quarter; Bio11: mean temperature of coldest quarter; Bio12: annual precipitation; Bio13: precipitation of wettest month; Bio14: precipitation of driest month; Bio15: precipitation seasonality (coefficient of variation); Bio16: precipitation of wettest quarter; Bio17: precipitation of driest quarter; Bio18: precipitation of warmest quarter; Bio19: precipitation of coldest quarter

ISSN: 1297-966X