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当前位置: 首页 > 文章 > 肃北地区裸果木荒漠群落构成特征及物种多样性研究 草业学报 2010,19 (1) 23-29
Position: Home > Articles > A study on species diversity of a Gymnocarpos przewalskii community in the Subei desert Acta Prataculturae Sinica 2010,19 (1) 23-29

肃北地区裸果木荒漠群落构成特征及物种多样性研究

作  者：
柴永青;曹致中;蔡卓山
单  位：
甘肃农业大学草业学院
关键词：
肃北;裸果木;群落;物种多样性
摘  要：
于2006-2008年对稀有植物裸果木在甘肃肃北的分布情况及其群落特征进行了调查研究,结果表明,在肃北北山地区裸果木主要分布在海拔1 500~1 600 m,在南山地区主要分布在海拔1 900~2 780 m,均分布于山前冲积扇、沙砾质戈壁和干河床地带。裸果木荒漠群落物种组成共计44种,隶属13科,31属,植物区系以古地中海、西亚至中亚分布型为主,约占54.8%。植物区系与古地中海植物区系有密切的联系。其次是北温带分布型,约占19.4%,裸果木分布区与北温带分布型植物区系联系紧密。第3是世界分布种,约占9.7%。群落的多样性指数均较高。但其高度和盖度较低,裸果木中老龄植株较多,而幼龄植株很少。种群有衰退趋势。
译  名：
A study on species diversity of a Gymnocarpos przewalskii community in the Subei desert
作  者：
CHAI Yong-qing1,2,CAO Zhi-zhong1,CAI Zhuo-shan1(1.College of Pratacultural,Gansu Agriculture University,Lanzhou 730070,China;2.Grassland Station of Subei County,Subei 736300,China)
关键词：
Subei;Gymnocarpos przewalskii;community;plant diversity
摘  要：
During 2006-2008,distribution and community characteristics of Gymnocarpos przewalskii which is a type of rare plant in the north of Subei were investigated.G.przewalskii is mainly distributed on Piedmont alluvial fan,gravel and dry river bed areas at altitudes of 1 500-1 600 m in the northern mountainous area of Subei and 1 900-2 780 m in the southern mountainous area of Subei.Species composition of G.przewalskii plant communities consist of 44 species that belong to 31 genera 13 families.Among them,the gravelly desert distribution elements are in the ancient Mediterranean and West Asia to Central Asia(54.8%).There is close relationship between the floras of G.przewalskii desert communities and those of the ancient Mediterranean.The North temperate distribution pattern takes second place(19.4%).Distribution of G.przewalskii has a strong relationship with floras in North temperate distribution patterns.World distribution of the species is 9.7%.The diversity indexes of the floras are all high,but physical height and cover of floras are low.The number of old plants is more than that of young plants,which implies that the whole floras show a trend of recession.

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