LI-8100A-S2 Soil Gas Flux System Survey Package

森林对全球变化的反应对全球碳循环至关重要。最近根据观测数据进行的研究表明，气候变化，例如水供应量的长期减少，对加拿大中西部北方森林的碳固存产生了强烈的负面影响。然而，水供应量的改变是否是这些森林中观察到的变化的气候变化驱动因素，仍有待实验检验。此外，土壤呼吸，这是第二大陆地碳通量，对气候变化的反应还没有在这些北方森林的研究。为了进一步了解这些森林对气候变化的响应，我建立了一个长期的北方森林水分变化实验，其中将研究土壤呼吸对水分减少和增加的响应，我建议购买一个LI-8100 A-S2土壤气体通量系统调查包，土壤项圈，土壤水分仪，和温度传感器装置。拟议的设备将使我们能够了解与短期和长期供水量变化有关的土壤呼吸模式和机制。我希望我们的研究将为了解北方森林对气候变化的反应做出重要贡献。拟议的设备将直接培训两名博士生和六名本科生。

The response of forests to global changes is critical to the global carbon cycle. Recent studies based on observational data have shown that climate changes such as long-term decreases in water availability have led to strong negative effects on carbon sequestration of west-central boreal forests of Canada. However, whether altered water availability is the climate change driver for the observed changes in these forests remains to be tested experimentally. Moreover, the response of soil respiration, which is the second-largest terrestrial carbon flux, to climate change has not been studied in these boreal forests. To further understand the response of these forests to climate change, I have established a long-term water alteration experiment in central boreal forests, in which the responses of soil respiration to water reduction and addition will be studied, and I propose to purchase one LI-8100A-S2 Soil Gas Flux System Survey Package, soil collars, soil moisture meter, and temperature sensor device for the 27 experimental sites we have established. The proposed equipment will enable us to understand the pattern and mechanisms of soil respiration associated with altered water availability in both short- and long-terms. I expect that our research will make an important contribution to understanding the response of boreal forests to climate changes. The proposed equipment will involve training two PhD students and six undergraduate students directly.