分布障碍 distributional barrier
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阻止生物分布区域扩展或移动的因素,称为分布障碍。简称障碍。例如陆地对于水生生物,寒冷温度区域对于高温性的热带生物,山岳、沙漠等对于陆生生物都是物理的或地理的障碍。外敌及竞争者也起着这种作用,这些都称为生物障碍(biotic barrier,亦称为分布障碍)。
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