Comparative study on spatial patterns of the Artemisia ordosica population in the Mu Us sandy land |
| |
Authors: | Yang Hongxiao Zhang Jintun Li Zhendong Wu Bo Zhang Zhongshan and Wang Yan |
| |
Institution: | 1. College of Aquatic Products, Qingdao Agricultural University, Qingdao 266109, China;2. College of Life Sciences, Beijing Normal University, Beijing 100875, China;3. Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;4. Key Laboratory of Forest Breeding, State Forestry Administration, Beijing 100091, China;5. Forestry Bureau of Wushen Banner, Ordos 017300, China |
| |
Abstract: | Artemisia ordosica is an under-shrub species, which dominates the vegetation of the Mu Us sandy land in North China. The spatial patterns of the A. ordosica population in different sandy lands were compared with the methods of Spatial Auto-correlation Analysis, Semi-variance Analysis and Nine-Term Local Quadrat Variance (9TLQV). The results show that, by contrast with the A. ordosica population in fixed sandy land, the population in semi-fixed sandy land is of stronger auto-correlation and greater spatial heterogeneity, and meanwhile it presents more intense differentiation between patches and gaps. The spatial patterns of the A. ordosica population in semi-fixed sandy land are probably governed by drifting sand caused by strong winds. Drifting sand can easily put A. ordosica shrubs to death unless they live together in form of A. ordosica patches, where the distances between shrubs are short. In semi-fixed sandy land, patches are not only the form of the A. ordosica population to survive drifting sand, but also the foundation of the A. ordosica population to develop and broaden the area. The A. ordosica population is supposed to broaden the area through edge extending out from the patches scattering in semi-fixed sandy land. The spatial patterns of the A. ordosica population in fixed sandy land are possibly affected by intra-specific competition related to high plant coverage. This study is ecologically useful to improve the practice of vegetation restoration in sandy land. When transplanting A. ordosica shrubs to bare sandy land, one had better arrange them in form of patches separated by gaps, which can promote the survival of transplanted shrubs, and also help to take advantage of A. ordosica patches to revegetate bare gaps. |
| |
Keywords: | sandy land sand-fixing plant population pattern differentiation between patches and gaps edge extending out from patches vegetation restoration |
本文献已被 ScienceDirect 等数据库收录! |
| 点击此处可从《生态学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《生态学报(英文版)》下载免费的PDF全文 |
|