Snow, shrub and climate feedbacks: impacts of shrub expansion in the Australian alpine zone

雪、灌木和气候反馈：澳大利亚高山地区灌木扩张的影响

• 批准号: DE140101611
• 负责人: A/Prof Susanna Venn
• 金额: $ 26.49万
• 依托单位: Deakin University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Early Career Researcher Award
• 财政年份: 2014
• 资助国家: 澳大利亚
• 起止时间: 2014-06-30 至 2019-02-16
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DE140101611
• 关键词: Snow; shrub; climate; feedbacks; impacts

This project aims to understand the mechanisms promoting shrub expansion in alpine areas and the consequences of a shrub-dominated landscape in terms of shrubs as hydrological mediators and as biodiversity and ecosystem modifiers. Some shrub species trap wind-blown snow, thereby facilitating seedling survival through soil insulation and increases to meltwater. However, if adaptive and plastic responses to climate change allows, shrub expansion will have significant negative impacts on alpine biodiversity and ecosystem function. This project will tease apart the interacting effects of snow, recruitment and adaptation to provide models of shrub increase and determine how shrubs modify alpine ecosystem processes and upper catchment hydrology.

该项目旨在了解促进高山地区灌木扩展的机制，以及以灌木为主导的灌木来作为水文介体以及生物多样性和生态系统修饰的后果。一些灌木种类捕获了风吹雪，从而通过土壤隔热材料促进了幼苗生存，并增加了融水。但是，如果自适应和塑性对气候变化的反应允许，灌木的扩展将对高山生物多样性和生态系统功能产生重大负面影响。该项目将嘲笑雪，招募和适应性的相互作用，以提供灌木模型的增加，并确定灌木如何修改高山生态系统过程和上游流域水文学。