华北地区荆条灌丛分布及物种多样性空间分异 规律
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Distribution and species diversity patterns of Vitex negundo var. heterophylla shrublands in North China
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图2. 华北荆条灌丛多元回归树分类。Lat, 纬度(° N); Ele, 海拔(m); n, 样方量。 |
Fig. 2. Classification of Vitex negundo var. heterophylla shrublands in North China. Lat, latitude (° N); Ele, elevation (m); n, the number of plots. |
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