鄂尔多斯沙地草场鼠类群落演替的研究

目的了解鄂尔多斯沙地草场1991～1998年鼠类群落演替。方法1991～1998年每年4～10月中旬在达拉特旗,中国农业科学院草原研究所沙地草场改良试验站的不同生境内,利用直线夹日法调查,并对调查资料进行分析,归纳。结果调查生境共有10种鼠栖息,分别为三趾跳鼠、五趾跳鼠、三趾心颅跳鼠、小毛足鼠、子午沙鼠、长爪沙鼠、黑线仓鼠、达乌尔黄鼠、褐家鼠和小家鼠。1991～1998年,鼠类群落结构由以喜干旱的荒漠草原鼠类为主(三趾跳鼠、小毛足鼠和子午沙鼠)演替为以较喜湿的典型草原鼠类为主(黑线仓鼠)。结论鄂尔多斯沙地草场鼠类群落的演替是由于该地实行围封、种草、种树的草场改良措施,使鼠类栖息环境发生了变化,即流动沙地和半流动沙地减少,固定沙地增多引起的。

Study on the Succession of Rodent Community in Ordos Sandland

Objective The succession of rodent community were studies in Ordos sandland from 1991 to 1998. Methods The succession of rodent community was investigated on Ordos sandland by rectilinear-trapping method in the ten days of each month from April to October during 1991-1998. Results There are ten species of rodents on Ordos sandland.They are northern three-toed jerboa (Dipus sagitta), mongolian five-toed jerboa (Allactaga sibirica), three-toed pygmy jerboa (Salpingotus kozlovi), desert hamster (Phodopus roborovskii),little chinese jird (Meriones meridianus), clawed jird (Meriones unguiculatus), striped hamster(Cricetulus barabensis), daurian ground squirrel (Spermophilus dauricus),norway rat (Rattus norvegicus) and house mouse (Mus musculus). The construction of rodent community was not different each year during 1991-1998. The dry-prefer rodent community (Dipus sagitta,Phodopus roborovskii,Meriones meridianus) was substituted by moist-prefer rodent community (Cricetulus barabensis). Conclusion The succession of rodent community arose from change of dwelled conditions in Ordos sandland.