新疆北塔山地区珍稀濒危植物种类及其地理成分

北塔山为中蒙边境的界山,地处新疆境内,属典型干旱山区,植物种类贫乏,区内珍稀濒危植物共计21种,隶属16科16属。其中,国家重点保护野生植物8种,中国物种红色名录收录6种,新疆重点保护野生植物15种;珍稀濒危种子植物区系分布区类型以北温带成分为主,与地中海、西亚至中亚分布及其变型联系紧密,中亚分布类型有微弱渗入;珍稀濒危种水平分布西多东少,集中分布于海拔900~2 000 m,且以旱生灌木、半灌木为主,仅有少量中生和湿生植物。

Rare and Endangered Plant Species and Their Geographical Elements in the Beita Mountain,Xinjiang

Located in the China-Mongolia boundary, the Beita Mountain is a typical arid mountain in Xinjiang,where a few plant species are distributed.There are totally 21 rare and endangered plant species in 16 genera and 16 families in the study area,among them 8 species are the national key protected plants,6 are in the national red list,and 15 are the key protected plant species in Xinjiang.The types of flora of the rare and endangered species in the north temperate zone are mainly composed of the elements in the north temperate zone and closely related to the Mediterranean, Western Asian and Central Asian distributions.The rare and endangered species are richer in the west than that in the east, which are mainly distributed in an altitude range of 900-2 000 m a.s.l., where shrubs and semi-shrubs are the main species, only a few Mesophytes and Hygrophytes are distributed.