Sources, Sinks and Subsidies of Carbon within Coastal Saltmarsh Habitats

沿海盐沼生境内的碳源、汇和补贴

• 批准号: 2734719
• 金额: --
• 依托单位: University of St Andrews
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2734719
• 关键词: Sources; Sinks; Subsidies; Carbon; within

Saltmarshes are vegetated intertidal ecosystems that support unique biodiversity and provide coastal protection from storms and floods, alongside other ecosystem services. They accrete organic carbon through accumulation of in-situ plant material and trapping of sediments during tidal flux. Saltmarshes can accumulate carbon at rates much faster than terrestrial forests, and for store it much longer. Thus, saltmarshes can contribute to mitigating climate change, but further work is required to determine how they cycle carbon. This research aims to use extensive field and lab-work, using novel methods, to improve our understanding of the fates of the different sources of organic carbon once accumulated into Scottish saltmarshes. It is hypothesised that the younger, in-situ material will be preferentially respired, and the older, more stable, trapped material will be stored for longer.My research will inform work to include saltmarshes in the UK's greenhouse gas inventory. It will help to highlight which saltmarshes could be targeted for management to maximise carbon storage and climate mitigation. It will contribute to a slim but important evidence base for emissions from saltmarshes, which is vital for understanding how they balance as carbon sources/sinks and fit into the global carbon cycle, and to improve carbon accounting accuracy.

盐沼是一种植物生长的潮间带生态系统，支持独特的生物多样性，并提供沿海免受风暴和洪水的保护，以及其他生态系统服务。它们通过就地积累植物材料和在潮汐期间捕获沉积物来共生有机碳。盐沼积累碳的速度比陆地森林快得多，而且储存的时间也更长。因此，盐沼可以有助于减缓气候变化，但需要进一步的工作来确定它们是如何循环碳的。这项研究旨在通过广泛的实地和实验室工作，使用新的方法，来提高我们对苏格兰盐沼中曾经积累的不同有机碳源的命运的理解。据推测，较年轻的就地物质将优先被呼吸，而较老的、更稳定的被困物质将被储存更长时间。我的研究将为将盐沼纳入英国温室气体清单的工作提供参考。它将有助于强调哪些盐沼可以成为管理的目标，以最大限度地增加碳储存和缓解气候变化。它将有助于为盐沼的排放提供一个细小但重要的证据基础，这对于理解它们作为碳源/汇如何平衡并适应全球碳循环以及提高碳核算的准确性至关重要。