中国梭梭属植物历史分布格局及其驱动机制

张丹, 马松梅, 魏博, 王春成, 张林, 闫涵

Historical distribution pattern and driving mechanism of Haloxylon in China

Dan Zhang, Songmei Ma, Bo Wei, Chuncheng Wang, Lin Zhang, Han Yan

表1 影响梭梭和白梭梭分布的气候变量的主成分(PC)特征值

Table 1 Principal component (PC) eigenvalues of climate variables affecting the distribution of Haloxylon ammodendron and H. persicum

气候因子 Climatic factor 梭梭 Haloxylon ammodendron 白梭梭 Haloxylon persicum PC1 PC2 PC3 PC4 PC5 PC6 PC1 PC2 PC3 PC4 PC5 PC6 平均气温日较差 Mean diurnal range (Bio2) -0.4010 -0.023 -0.4471 0.3015 0.7218 -0.0155 0.0800 0.0560 0.6657 0.0289 0.3137 0.5855 温度季节性 Temperature seasonality (Bio4) 0.3534 0.3672 0.3143 0.3992 0.1067 -0.2803 最热月最高温 Max temperature of warmest month (Bio5) -0.4205 -0.3078 -0.2280 -0.2558 0.3226 0.0864 最冷月最低温 Min temperature of coldest month (Bio6) -0.3240 0.0336 -0.5535 0.0760 0.1049 0.4440 气温年较差 Annual temperature range (Bio7) -0.2233 -0.4475 0.2756 -0.4223 0.3220 -0.3503 最湿季平均温 Mean temperature of wettest quarter (Bio8) -0.0631 0.6370 0.4028 -0.0623 0.3398 0.4079 最干季平均温 Mean temperature of driest quarter (Bio9) -0.3546 0.2862 0.0772 0.6046 0.5461 -0.2837 最冷季平均温 Mean temperature of coldest quarter (Bio11) -0.3831 0.2188 0.0367 -0.7455 0.0309 -0.1367 年均降水量 Annual precipitation (Bio12) 0.4753 -0.1496 -0.2554 -0.0359 0.4549 0.3195 最湿月降水量 Precipitation of wettest month (Bio13) 0.0528 -0.5800 0.6229 -0.1540 0.4640 -0.1687 0.4583 0.2152 -0.2196 -0.2281 0.4103 -0.2874 最干月降水量 Precipitation of driest month (Bio14) 0.4469 -0.0836 -0.1889 -0.2130 0.1093 0.3556 降水季节性变化 Precipitation seasonality (Bio15) -0.4064 -0.2396 0.2714 0.2735 -0.2429 0.6464 -0.0183 0.5997 -0.0048 -0.3225 0.0936 -0.1350 最冷季降水量 Precipitation of coldest season (Bio19) 0.4426 -0.1004 -0.2010 -0.2152 0.2551 0.4042 0.3162 -0.4364 -0.0558 0.4762 0.0238 -0.2155