Shi Ya Fei, Zhang Zhi Shan, Huang Lei, Hu Yi Gang, Li Jun, Yang Yu Guang
Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Ying Yong Sheng Tai Xue Bao. 2016 Apr 22;27(4):1024-1030. doi: 10.13287/j.1001-9332.201604.013.
The objective of this study was to investigate species composition, and predict future development of dominant species on semi-fixed sand dunes in the Gurbantongut Desert. Using the plant height, crown area and volume instead of age structure, the growth and development condition of dominant shrub populations were analyzed. The results showed that totally 23 species were observed, of which Chenopodiaceae occurred the most with 6 genera 8 species, followed by Asteraceae with 5 genera 6 species. The vegetation community of Gurbantunggut Desert was characterized by few species, and simple structure. As a dominant species, Haloxylon persicum was distributed mainly on the top of the dunes and was a stable increasing population. However, the number of H. ammodendron was small. Artemisia ordosica, as an exotic species introduced by vegetation restoration after construction, covered mainly in the windward and the top of dunes. The po-pulation of A. ordosica had an increasing age structure with a strongly increasing potential, which has affected local species composition. The populations of Calligonum leucocladum and Ephedra distachya were lack of seedlings and had few saplings, resulting in the declining age structure. Due to the same distribution habitat, C. leucocladum might be replaced by A. ordosica in the future.
本研究旨在调查古尔班通古特沙漠半固定沙丘的物种组成，并预测优势物种的未来发展。通过使用株高、冠幅和体积而非年龄结构，分析了优势灌木种群的生长发育状况。结果表明，共观察到23个物种，其中藜科出现最多，有6属8种，其次是菊科，有5属6种。古尔班通古特沙漠的植被群落物种较少，结构简单。作为优势物种，梭梭主要分布在沙丘顶部，是一个稳定增长的种群。然而，梭梭的数量较少。油蒿作为建设后植被恢复引入的外来物种，主要覆盖在迎风面和沙丘顶部。油蒿种群年龄结构呈增长型，具有较强的增长潜力，已影响到当地物种组成。白梭梭和膜果麻黄种群缺乏幼苗，幼树也很少，导致年龄结构呈衰退型。由于分布生境相同，未来白梭梭可能会被油蒿取代。
