地理扩散(Geodispersal)是一个与地理隔离相对的过程,指阻挡两个生态系统或种群之间发生交流的地理屏障消失后,两个生态系统或种群开始逐步融合的过程。地理扩散的一个例子是巴拿马地峡在300万年前形成后,南北美洲大陆动植物间发生的南北美洲生物大迁徙[1][2][3]。
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