自从“竞争排斥”理论被提出以来，生态相似物种在同一空间的共存机制（mechanism of coexistence） 一直是群落生态学研究中的焦点之一。关于这个问题的研究涉及许多不同类型的动物群落。本文综述了国内外相关荒漠啮齿类群落物种共存机制的研究。该群落物种共存机制主要可以被归结为：（1） 资源分享；（2） 与时间相关的微栖息地选择；（3） 与空间相关的微栖息地选择。
On the basis of three aspects,four mechanisms of coexistence are considered that may contribute to the diversity of desert granivorous rodent communities．In the first, bush／open microhabitat selection,coexistence is possible if there is a trade–off between forag– ing efficiency in the bush and open microhabitats．In the second,temporal variation in resource abundances,coexistence is possible if there is a trade–off between foraging efficiency and main– tenance efficiency.The first species can forage profitably on low resource abundances while the second uses dormancy to travel in expensively in time between periods of high resource abun– dances. In the third,spatial variation in resource abundance,coexistence is possible if there is a trade–off between foraging efficiency and the cost of travel．The first species forages patches to a lower giving–up density（the density of resource at which a forager ceases foraging）,while the second can inexpensively travel between patches with high resource abundances．In the fourth,seasonal rotation in foraging efficiencies,coexistence is possible if there is a trade–off between costs of foraging during different seasons．The species that is the more efficient forager changes seasonally.
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