文献类型：期刊文献

中文题名：乌兰布和沙漠-西鄂尔多斯荒漠草原过渡带灌木群落对生长季降水的响应

英文题名：Response of Shrub Communities to Precipitation during Growing Season in the Ulan Buh Desert-Western Ordos Steppe Desert Ecotone

作者：宋兆斌[1] 罗凤敏[2] 马媛[2] 李星[2] 辛智鸣[2]

第一作者：宋兆斌

机构：[1]中国林业科学研究院荒漠化研究所/生态保护与修复研究所,北京100091;[2]中国林业科学研究院沙漠林业实验中心,内蒙古磴口015200

年份：2023

卷号：42

期号：2

起止页码：25-31

中文期刊名：中国野生植物资源

外文期刊名：Chinese Wild Plant Resources

收录：CSCD:【CSCD_E2023_2024】；

基金：国家科技基础资源调查专项子课题“沙漠植物多样性综合考察”(2019FY102002-5)。

语种：中文

中文关键词：乌兰布和沙漠;生态过渡带;降水;灌木群落;物种多样性

外文关键词：Ulan Buh desert;ecotone;Precipitation;Shrub community;Species diversity

分类号：Q948.158

摘要：降水是影响荒漠植物群落结构和多样性的主要因子。研究乌兰布和沙漠-西鄂尔多斯荒漠草原过渡带植物群落特征及多样性对生长季内降水波动的响应,对该区的植物保护和生态环境建设具有重要意义。结合2020年生长季对驼绒藜、霸王、四合木和沙冬青群落固定样地的植被调查数据与同期降水量资料,分析了该区典型灌木群落特征及多样性随降水的变化趋势。7~9月,随着降水增加,驼绒藜群落内的多年生草本种类显著增加;4个灌木群落内的一年生草本种类显著增加。驼绒藜群落的密度显著增加;霸王和四合木群落的盖度显著增加。四合木群落草本层的Patrick丰富度指数显著增加;霸王群落草本层的Patrick丰富度指数显著增加,Simpson指数和Pielow指数显著降低;沙冬青群落草本层的4个多样性指数均显著增加。乌兰布和沙漠-西鄂尔多斯荒漠草原过渡带不同灌木群落特征及多样性对降水变化响应差异较大,灌木层受降水影响较小,草本层对降水增加响应比较敏感。
Precipitation is the main factor affecting the structure and diversity of desert plant community.It is of great significance for plant protection and ecological environment construction to study the response of plant community characteristics and diversity to precipitation fluctuation during growing season in Ulan Buh desert-Western Ordos steppe desert ecotone. Based on the vegetation survey data and precipitation data of the fixed plots of Krascheninnikovia ceratoides community, Scarcozygium xanthoxylon community, Tetraena mongolica community and Ammopiptanthus mongolicus community in the growing season of 2020, the characteristics and diversity of typical shrub communities in the region were analyzed.With the increase of precipitation from July to September, With the increase of precipitation from July to September, the species of perennial herbaceous in K. ceratoides community increased significantly. The species of annual herbs in four shrub communities increased significantly. The community density of K.ceratoides increased significantly. The coverage of S. xanthoxylon and T. mongolica communities increased significantly. The Patrick index in herbaceous layer of T. mongolica community increased significantly. Patrick index increased significantly, Simpson index and Pielow index decreased significantly in herbaceous layer of S. xanthoxylon community. The four diversity indexes in herbaceous layer of A. mongolicus community increased significantly. The characteristics and diversity of different shrub communities differed greatly in response to precipitation change in Ulan Buh desert-Western Ordos steppe desert ecotone, the shrub layer was less affected by precipitation, and the herb layer was more sensitive to precipitation increase.