Lags and legacies: antecedent effects on grassland biomass response to carbon dioxide

滞后和遗产：草原生物量对二氧化碳反应的先行影响

• 批准号: DP190102025
• 负责人: Prof Mark Hovenden
• 金额: $ 32.38万
• 依托单位: University of Tasmania
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2019
• 资助国家: 澳大利亚
• 起止时间: 2019-02-14 至 2022-09-30
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP190102025
• 关键词: Lags; legacies; antecedent; effects; grassland

This project aims to assess how past conditions influence grassland responses to the rising atmospheric concentration of carbon dioxide. High CO2 concentrations should stimulate productivity but in grasslands this is rarely realised because other, mostly unknown, factors constrain the response. By synthesising data from past experiments, this project aims to determine exactly why grasslands fail to realise the full productivity benefits of increased CO2 and when this will happen. This should improve predictions of carbon exchange and indicating the best direction for climate change adaptation measures.

该项目旨在评估过去的条件如何影响草原对大气二氧化碳浓度上升的反应。高浓度的二氧化碳应该刺激生产力，但在草原上，这是很少实现的，因为其他，大多数是未知的，因素限制了反应。通过综合过去实验的数据，该项目旨在确定为什么草原未能实现增加二氧化碳的全部生产力效益，以及何时会发生这种情况。这将改善对碳交换的预测，并为气候变化适应措施指明最佳方向。