【摘要】 依据地形及其内植被组成特征，划分出5种微栖息地类型。通过在不同物候期的观测表明，4种共存的鼠种间存在着明显的微栖息地分离。二足型跳鼠多选择在开阔的空间活动，四定型沙鼠则主要在多年生灌丛下取食。二种类型的鼠类微栖息地选择都不同程度地与较高的多年生灌木（高度＞1．0m）相关。三趾跳鼠（DipusSogitta）的微栖息地利用表现出在不同物候相转换的特点，这可能与食物的获取有关。微栖息地分离可能是不同荒漠鼠种得以共存的主要原因之一。更多还原

【Abstract】 From March of l997 toJune of l998, we investigated five main hacrohabitat trpes insouthern Dzungaria Basin of Xinjiang China. These whcrohabitats are defined on the basis of the terrainand the vegetation. This study showed there were four species in there ndcrohabitats:l. Rhombomys opimus inhabitated mainly in type Ⅲ microhabitat, Meriones meridianus in type Ⅱmicrohabitat, Salpingotus crassicauda almost in Ⅳ, Dipus sagtta can be observed in all types.2 .The Ancrohabitat use of both bipedal rodent and quadmpedal rodent was correlated with the highperennial shrub(height > l .0m), although bipedal rodent prefers to move in open space and thequadrupedal rodent forages primarily beneath the shrub. This result may be relate to the risk ofpredator.3. In different seasons, Dipus sagitta can shift their microhabitat use among different types. We be-lieved The cause should relate to take food.更多还原