Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 31300390 |
| 水源圈效应对荒漠草原土壤种子库和植物群落的影响 | |
| 徐文轩 | |
| 主持机构 | 中国科学院新疆生态与地理研究所 |
| 开始日期 | 2014 |
| 结束日期 | 2016 |
| 资助经费 | 210000(CNY) |
| 项目类别 | 青年科学基金项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | As the primary mode in the utilization of desert grassland, grazing has significant influence on stability of desert ecosystem. Extensive research suggests that overgrazing is the most important cause of grassland degradation and desertification. An obvious example is the piosphere, which means the different grazing and trampling gradients of livestock around areas of the water points, and result in the radial degradation of grassland ecosystem along a gradient from the water points. This phenomenon is widespread in China's arid and semi-arid grassland, including Xinjiang. Since Lange put forward this concept in 1969, piosphere got more and more attentions, and especially in recent 10 years. Many scientists studied the ecological processes and phenomenons under the different gazing gradients and distances from the water points within piopheres. However, the current studies on piosphere effects most focus on the changes of plant communities, neglect the researches on soil seed banks. Up to now a few researches on this subject in China were limited to qualitative description which lack of quantitive studies. So the objective of this program is to determine the patterns and changes of plant communities and soil seed banks within piospheres in desert grassland of the north slope of Tianshan Mountains in Xinjiang. By analyzing composition, distribution and primary productivity of plant communities and soil seed banks within piospheres, we hope to quantify the impact of piosphere effect on ecological process in desert ecosystem,test the intermediate disturbance hypothesis, reveal the mechanisms of degradation succession in desert grassland, and provide a theoretical basis for ecological management and restoration of deteriorated grassland. |
| 中文关键词 | 水源圈 ; 土壤种子库 ; 植物群落 ; 荒漠草原 ; 生物扰动 |
| 来源机构 | 中国科学院新疆生态与地理研究所 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346618 |
| 推荐引用方式 GB/T 7714 | 徐文轩.水源圈效应对荒漠草原土壤种子库和植物群落的影响.2014. |
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