Testing the effects of productivity, grazing and drought on grassland plant diversity

测试生产力、放牧和干旱对草原植物多样性的影响

• 批准号: RGPIN-2017-04984
• 负责人: Fraser, Lauchlan
• 金额: $ 2.91万
• 依托单位: Thompson Rivers University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=651116
• 关键词: Testing; effects; productivity; grazing; drought

The long-term goal of my research is to understand what controls plant diversity in grasslands and how plant diversity affects grassland ecosystem function. Considering the importance of grasslands worldwide and the stressors that affect grasslands, such as climate change, over-grazing and habitat loss, it is critical to provide information for optimal land management. The short-term goals that I propose within my Discovery Grant application are designed to determine the effects of productivity, grazing and drought on temperate grassland biodiversity and plant trait-ecosystem function relationships. A new dimension to my research will be to embed local research objectives within two international research networks, HerbDivNet and DroughtNet. I will manipulate productivity, grazing and drought on grassland ecosystems, and tease apart fine-scale and landscape patterns in herbaceous plant diversity to: (1) test how productivity affects alpha and beta diversity of grassland communities; (2) determine whether grassland type influences the relationship between plant biomass and herbaceous species richness with and without grazing; and (3) test the effects of reducing water availability through rainout shelters on temperate grassland plant communities and ecosystem-level processes.

我的研究的长期目标是了解如何控制草原植物多样性以及植物多样性如何影响草原生态系统功能。考虑到全球草原的重要性以及影响草原的压力源，例如气候变化，过度放牧和栖息地丧失，为最佳土地管理提供信息至关重要。我在发现赠款应用程序中提出的短期目标旨在确定生产力，放牧和干旱对温带草地生物多样性和植物特质生物生物系统功能关系的影响。我的研究的一个新维度将是将当地研究目标嵌入两个国际研究网络Herbdivnet和Dwardnet中。我将在草原生态系统上操纵生产力，放牧和干旱，并在草本植物的多样性中嘲笑精细规模和景观模式，以：（1）测试生产力如何影响草地社区的阿尔法和β多样性； （2）确定草原类型是否会影响植物生物量与草本物种丰富度之间的关系，而没有放牧； （3）测试通过雨地庇护所减少水的供应对温带草地植物群落和生态系统级工艺的影响。