甘肃珍稀濒危植物绵刺的调查与保护对策

1995 - 1998年先后对甘肃绵刺 (PotaniniamongolicaMaxim .)的分布、物种多样性及群落特征进行调查 ,绵刺在甘肃境内主要分布于河西走廊北部 ,海拔 10 0 0～ 180 0m ,灰棕荒漠土的沙砾质戈壁。其荒漠组成成分共计 48种 ,隶属 11科 37属 ,以戈壁荒漠区系成分 (亚洲中部荒漠区系成分 )为主 (4 5 83% ) ,亚洲中部草原区系成分次之(35 42 % ) ,古地中海区系成分也占有一定比例 (18.75 % )。生物多样性较丰富 ,群落演替较稳定。人类活动中 ,开垦、修路、樵柴等已对绵刺造成严重破坏 ,至今尚无有效的保护措施 ,为此提出了几点保护对策

Investigation on the rare and endangered species Potaninia mongolica Maxim.and its conservation strategies in Gansu Province

Results based on research and investigation, showed that Potaninia mongolica Maxim. vegetates on the sand and gravel desert area in north of the Hexi Corridor, where altitude is 1 000-1 800 m. In Gansu Province, Form. P. mongolica Maxim. is composed of 48 species that belong to 37 genera 11 families. Among them, the gravelly sandy desert distribution elements (the Central Asia desert distribution elements) are in the ascendant (45.83%); the Central Asia distribution grassland elements take second place(35.42%); the Ancient Mediterranean distribution elements also occupy a certain proportion (18.75%). Among the human actions, reclaiming wasteland, building roads, digging firewood and so on have brought serious damage to P. mongolica . But up to now no effective conservation steps have been taken, so some conservation strategies are put forward.=