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| 库姆塔格沙漠植物群落类型及其多样性 | |
| 引用本文： | 张锦春,张甲雄,袁宏波,唐进年,丁峰,肖斌,刘淑娟.库姆塔格沙漠植物群落类型及其多样性[J].草业科学,2012,29(10):1581-1588. |
| 作者姓名： | 张锦春 张甲雄 袁宏波 唐进年 丁峰 肖斌 刘淑娟 |
| 作者单位： | 1. 甘肃省荒漠化与风沙灾害防治国家重点实验室培育基地,甘肃兰州730070 甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃民勤733000 2. 甘肃林业职业技术学院,甘肃天水,741020 3. 甘肃省荒漠化与风沙灾害防治国家重点实验室培育基地,甘肃兰州,730070 |
| 基金项目： | 国家地区基金“库姆塔格沙漠柽柳沙包稳定碳同位素对环境的响应” |
| 摘 要： | 采用线路调查法研究了库姆塔格沙漠植物群落类型及植物物种多样性。结果表明，库姆塔格的植被可划分为山前戈壁荒漠植被、沙漠植被和荒漠草甸植被3大类型，其中沙漠南部山前戈壁的荒漠植被17类，沙漠东缘和北缘的荒漠草甸植被12类，沙漠植被13类。因分布区域的差异，不同植物群落的物种多样性存在一定差异，南缘戈壁荒漠植物群落较稳定，物种多样性水平高，多样性指数平均为1.437，均匀度和优势度指数分别为0.824和0.302；沙漠植物群落物种组成稀少，群落稳定性差，多样性指数平均为0.725，均匀度指数为0.533；盐化草甸类植物群落多样性水平不高，群落相对较稳定，多样性、均匀度、优势度指数分别为0.804、0.807、0.547。戈壁荒漠植物群落随着气候环境干旱程度的加剧，多样性水平趋于减少，北缘植物群落多样性在中部地段明显升高，这与土壤结构组成有必然的联系，两条经度线上植物群落多样性变化与区域地形地貌及水文条件具有密切的关系。 |
| 关 键 词： | 戈壁荒漠植被 沙漠植被 荒漠草甸植被 |
Analysis on types and diversity of desert plant communities in Kumutage Desert |
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| ZHANG Jin-chun,ZHANG Jia-xiong,YUAN Hong-bo,TANG Jin-nian,DING Feng,XIAO Bin,LIU Shu-juan.Analysis on types and diversity of desert plant communities in Kumutage Desert[J].Pratacultural Science,2012,29(10):1581-1588. | |
| Authors: | ZHANG Jin-chun ZHANG Jia-xiong YUAN Hong-bo TANG Jin-nian DING Feng XIAO Bin LIU Shu-juan |
| Institution: | 1(1.State Key Laboratory of Desertification and Aeolian Sand Disaster Combating,Gansu Desert Control Research Institute, Lanzhou 730070,China;2.Minqin National Research Station for Desert Steppe Ecosystem,Gansu Desert Control Research Institute,Minqin 733000,China;3.Gansu Forestry Technological College,Tianshui 741000,China) |
| Abstract: | The line investigation method was used to study types and species diversities of desert plant communities in Kumutage Desert. The results indicated that there were three vegetation types in Kumutage desert, which were 1) the Gobi desert vegetation, including 17 desert plant communities distributed in front of the mountain in the south fringe of Kumutage Desert; 2) the desert meadow vegetation, including 12 desert plant communities in the east and north fringe of Kumutage Desert; and 3) the sandy desert vegetation, including 13 desert plant communities．Species diversities of desert plant communities in different areas were varied due to the difference of their distribution areas. However, Gobi desert vegetation in the south fringe was steady with higher species diversity index (1.437) and homogeneity index (0.824), but the dominance index was lower (0.302). There were less species composition and poor community stability of sandy desert vegetation, which the average indices of diversity and homogeneity were 0.725 and 0.533. Species diversity of the desert meadow vegetation in the east and north fringe was not very high and community relatively steady, which the average indices of diversity, evenness and dominance were 0.804, 0.807 and 0.547, respectively. With the drought intensification of climate and environment, the species diversity of Gobi desert vegetation tended to reduce, but the species diversity of desert meadow vegetation in the north fringe was significant higher than the central location caused by the different soil structure and composition. However, the factors, such as regional landform, geomorphy and hydrology, closely related to the diversity difference of desert plant communities of the two longitude lines. |
| Keywords: | Kumutage Desert desert plant community species diversity |
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