| Soil erosion and vegetation succession in alpine Kobresia steppe meadow caused by plateau pika - A case study of Nagqu County, Tibet | |
| Wei Xinghu1; Li Sen1; Yang Ping2; Cheng Huaishun2 | |
| 刊名 | CHINESE GEOGRAPHICAL SCIENCE
 |
| 2007-03-01 | |
| 卷号 | 17期号:1页码:75-81 |
| 关键词 | plateau pika alpine Kobresia steppe meadow vegetation succession diversity Tibet |
| ISSN号 | 1002-0063 |
| DOI | 10.1007/s11769-007-0075-0 |
| 通讯作者 | Wei Xinghu(weixinghu1964@yahoo.com) |
| 英文摘要 | This paper evaluated the impacts of mounds created by the plateau pika (Ochotona curzoniae) on the vegetation composition, structure, and species diversity of an alpine Kobresia steppe meadow in Nagqu County, Tibet Autonomous Region, China. Based on mound height or the depth of erosion pit, we defined five stages of erosion and compared the floristic features of communities at these stages with those in undisturbed sites. In the study area, the mounds and pits covered up to 7% of the total area. Lancea tibetica, Lamiophlomis rotata, and Potentilla bifurca were the dominant species in erosion pits, and Kobresia pygmaea, the dominant species in undisturbed sites, became a companion species in eroded areas. In the process of erosion, the original vegetation was covered by soil ejected by the pika, then the mounds were gradually eroded by wind and rain, and finally erosion pits formed. The vegetation coverage increased with increasing erosion stages but remained significantly lower than that in undisturbed sites. Improved coverage eventually reduced soil erosion, and pit depth eventually stabilized at around 20cm. Aboveground biomass increased with increasing erosion stage, but the proportion of low-quality forage reached more than 94%. The richness index and Shannon-Wiener index increased significantly with increasing erosion stage, but the richness index in mound and pit areas was significantly lower than that in undisturbed sites. |
| 收录类别 | SCI |
| WOS关键词 | PLANT-SPECIES DIVERSITY ; GOPHER GEOMYS-BURSARIUS ; TEXAS COASTAL PRAIRIE ; POCKET GOPHERS ; THOMOMYS-TALPOIDES ; DYNAMICS ; IMPACT ; DISTURBANCE ; COMMUNITY ; MAMMALS |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000254430800011 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2555990 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wei Xinghu |
| 作者单位 | 1.Foshan Univ, Dept Geog, Foshan 528000, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei Xinghu,Li Sen,Yang Ping,et al. Soil erosion and vegetation succession in alpine Kobresia steppe meadow caused by plateau pika - A case study of Nagqu County, Tibet[J]. CHINESE GEOGRAPHICAL SCIENCE,2007,17(1):75-81. |
| APA | Wei Xinghu,Li Sen,Yang Ping,&Cheng Huaishun.(2007).Soil erosion and vegetation succession in alpine Kobresia steppe meadow caused by plateau pika - A case study of Nagqu County, Tibet.CHINESE GEOGRAPHICAL SCIENCE,17(1),75-81. |
| MLA | Wei Xinghu,et al."Soil erosion and vegetation succession in alpine Kobresia steppe meadow caused by plateau pika - A case study of Nagqu County, Tibet".CHINESE GEOGRAPHICAL SCIENCE 17.1(2007):75-81. |
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