Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 31500343 |
| 胡杨水分再分配对荒漠杜加依林植物多样性的影响 | |
| 杨晓东 | |
| 主持机构 | 新疆大学 |
| 开始日期 | 2016 |
| 结束日期 | 2018 |
| 资助经费 | 200000(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 | The hydraulic redistribution (HR) of deep-rooted plants have significantly changes the pattern of water distribution in arid deserts, which subsequently induce the shallow-rooted shrubs and herbs assembly in redistribution area and maintain the biodiversity in arid deserts. Our previous research revealed that the constructive species i.e., Populus euphratica of Tugai Forest, has HR, and that total amount of HR significantly correlated with species richness and abundance, but none of those studies have directly tested this mechanism through experiment. In addition, shallow-rooted herbs and shrubs that assembled in HR area have improved the nutrient contents because of the effects of the “fertile island” and “crown interception”. Thus, these processes contributed a positive feedback of water and nutrient among deep- and shallow-rooted plants. However, the above complementarity relationships between deep- and shallow-rooted plants still remains unclear. In the proposed, the total amount of P.euphratica will be estimated by Ryel model, and subsequently the relationships among HR amount, richness, abundance, and plant’s drought tolerance will be tested to reveal the effects of HR on biodiversity and the distribution pattern of shallow-rooted plants. Then, the difference of nutrient contents between redistribution and non-redistribution area will be determined in order to clarify the effects of “fertile island” and “crown interception” on HR. In addition, the simulated control experiment will be employed to examine the positive feedback between deep- and shallow-rooted plants for water and nutrient in contrasting HR and “fertile island” and “crown interception” treatments, and to verify the effectiveness of HR on biodiversity in arid desert. The aim of the proposed project attempts to improve our understanding of the physiological mechanism that sustains plant diversity in the arid desert region, and thus providing a potential recommendation to conserve the rare natural resources in Xinjiang region. |
| 中文关键词 | 水分再分配 ; 胡杨 ; 植物多样性 ; “肥岛效应”和“树冠截留” ; 杜加依林 |
| 来源机构 | 新疆大学 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346966 |
| 推荐引用方式 GB/T 7714 | 杨晓东.胡杨水分再分配对荒漠杜加依林植物多样性的影响.2016. |
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