文献类型：期刊文献

中文题名：河西走廊西段戈壁灌木群落多样性及其分布格局研究

英文题名：Gobi shrub species diversity and its distribution pattern in west Hexi Corridor

作者：董雪[1,5] 李永华[2,3,4] 辛智鸣[1,5] 段瑞兵[1,5] 姚斌[2] 包岩峰[2] 黄雅茹[1,5] 张正国[2]

第一作者：董雪

机构：[1]中国林业科学研究院沙漠林业实验中心,内蒙古磴口015200;[2]中国林业科学研究院荒漠化研究所,北京100091;[3]库姆塔格荒漠生态系统国家定位观测研究站,甘肃敦煌736200;[4]甘肃敦煌荒漠生态系统国家定位观测研究站,甘肃敦煌736200;[5]内蒙古磴口荒漠生态系统国家定位观测研究站,内蒙古磴口015200

年份：2020

卷号：43

期号：6

起止页码：1514-1522

中文期刊名：干旱区地理

外文期刊名：Arid Land Geography

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家重点研发计划“荒漠生态质量监测技术集成与应用示范”(2017YFC503804-4);科技基础资源调查专项“河西走廊西段荒漠主要植物群落调查”(2017FY100203-1);国家自然科学基金“极干旱区洪水驱动的植物分布格局与生存策略”(41671049)。

语种：中文

中文关键词：荒漠戈壁;灌木群落;物种多样性;地理分布

外文关键词：gobi desert;shrub communities;species diversity;geographical distribution

分类号：Q948

摘要：通过野外样方调查河西走廊西段荒漠戈壁典型灌木群落多样性状况,研究探讨了8种典型灌木群落物种多样性的空间分布格局及其与地理因子的关系,对荒漠戈壁植物群落的多样性的保护和可持续发展具有重要意义。结果表明:(1)8个典型灌木群落Shannon-Wiener指数、Simpson指数、Margalef指数和Pielou指数从高到低为:盐爪爪群落>麻黄群落>合头草群落>红砂群落>梭梭群落>泡泡刺群落>多枝柽柳群落>沙拐枣群落;波动范围分别为0.314~1.355、0.179~0.666、0.334~1.222和0.051~0.218,说明荒漠戈壁灌木群落物种多样性指数偏低,群落结构简单,物种组成稀少。(2)不同灌木群落内物种数越多,群落间Jaccard相似性系数越大。大部分灌木群落类型间Jac?card相似性在0.20~0.60之间,群落间相似水平较低,群落相对稳定。(3)随着海拔的升高,Margalef指数、Pielou指数和Shannon-Wiener指数均呈先增加后降低的单峰型分布格局,最大值出现在海拔2000 m,且与海拔显著相关(P<0.05);在经度梯度上,从东到西,Margalef指数、Pielou指数和Shan?non-Wiener指数呈递增格局,但与经度无显著相关性(P>0.05);在纬度梯度上,从南到北,Margalef指数、Pielou指数和Shannon-Wiener指数呈显著递增趋势(P<0.05)。总体上,荒漠戈壁灌木群落物种多样性呈现出明显的垂直(海拔)和纬度地带性分布格局。
To elucidate the plant diversity of typical shrub communities species diversity in west of Hexi Corridor,Gansu Province,China,spatial distribution pattern of species diversity and its relationship with geographical factors were discussed in this paper via field sample survey.It is important for maintaining,self-improvement,scientific conservation,and managing the diversity of the gobi shrub communities.Results showed that:(1)Simpson index,Shannon-Wiener index,richness Margalef index,and evenness Pielou index of eight desert gobi shrub communities are calculated and compared.The order is Kalidium foliatum community>Ephedra przewalskii community>Sympegma regelii community>Reaumuria songarica community>Haloxylon ammodendron community>Nitraria sphaerocarpa community>Tamarix ramosissima community>Calligonum mongolicum community.The Shannon-Wiener,Simpson,Margalef,and Pielou fluctuation range of the indexes were 0.314-1.355,0.179-0.666,0.334-1.222,and 0.051-0.218.The species diversity indexes of gobi desert shrub communities were observed to be low.The structure and composition of the shrub communities were simple and rare.(2)More species in the community results in higher Jaccard similarity coefficient between communities.The Jaccard similarity between most shrub community types ranges from 0.20 to 0.60.Most Jaccard similarity levels between communities were low and the communities were relatively stable.(3)For the species diversity such as Margalef and Pielou,the Shannon-Wiener index showed an increasing and then decreasing trend,similar to the Unimodal pattern,where the maximum occurred at 2000 m of the elevational gradient.The correlation between species diversity and altitude were significant(P<0.05).The species density had a significant increasing trend from south to north(P<0.05),while it had a non-significant increasing trend from east to west(P>0.05).On the community scale,the species diversity of gobi desert shrub communities showed obvious vertical(altitude)and latitude zonal distribution pattern.