How does warming prevent soil nitrogen availability from declining in response to elevated CO2?

变暖如何防止土壤氮素有效性因二氧化碳浓度升高而下降？

• 批准号: DP0984779
• 负责人: Prof Mark Hovenden
• 金额: $ 32.22万
• 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: 2009
• 资助国家: 澳大利亚
• 起止时间: 2009-01-01 至 2014-06-30
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0984779
• 关键词: How; does; warming; prevent; soil

The sustainable use of the terrestrial environment depends upon maintaining ecosystem productivity which in turn depends upon nutrient availability within the soil. Increasing levels of CO2 in the atmosphere are known to decrease nutrient availability while warming prevents this from happening. The aims of this project are to determine how warming is able to prevent elevated CO2 concentrations from reducing soil N availability and hence productivity in a native grassland ecosystems. This is important, as it will allow likely problems caused by global climate change to be predicted by increasing the understanding of the underlying mechanisms as well as improving the management of grasslands in an environmentally sustainable way.

陆地环境的可持续利用取决于维持生态系统的生产力，而生态系统的生产力又取决于土壤中的养分供应。众所周知，大气中二氧化碳含量的增加会减少养分的可用性，而变暖则会阻止这种情况的发生。该项目的目的是确定如何变暖是能够防止CO2浓度升高，减少土壤氮的可用性，从而在一个天然草原生态系统的生产力。这一点很重要，因为这将有助于通过增进对潜在机制的了解以及以环境可持续的方式改善对草原的管理，预测全球气候变化可能造成的问题。