Ecosystems Nitrogen Status and Trace Gas Fluxes

对两个慢性N-限制性 哈佛森林的生态系统发生了迅速的变化 在CH 4的消耗，并开始脉冲损失的N2 O。 这些都发生在同步的变化，NO3，浸出 损失，土壤中的N 03和NH 4浓度，CO2流出，以及 叶片氮化学 在这项研究中，校长 研究人员将在这些相同的系统中测量C 0消耗， 他们假设这将类似于CH 4 消费 CH_4、C_0和N_20的组合变化 他们希望引起，如果代表区域规模， 对慢性氮沉降的反应，将有助于显着 大气化学和全球气候的变化 PI的 有资格进行这项研究， 都很棒

Results from a four-year study to two chronic N-limited forests ecosystems at the Harvard Forest have shown rapid changes in CH4 consumption, and the initiation of pulse losses of N20. These have occurred in synchrony with changes in N03, leaching losses, N03 and NH4 concentrations in soils, C02 efflux, and foliar nitrogen chemistry. In this study, the principal investigators will measure C0 consumption in these same systems, which they hypothesize will respond analogously to CH4 consumption. The combined changes influxes of CH4, C0) and N20 they expect to elicit, if representative of regional-scale responses to chronic N deposition, would contribute significantly to altered atmospheric chemistry and global climate. The PI's are well qualified to conduct this research and the facilities are excellent.