Mires are among the ecosystems most affected by eutrophication caused by excessive nitrogen (N) inputs via N deposition of ammonium (NH4+), nitrate (NO₃^–), nitric acid (HNO₃), nitrogen dioxide (NO₂), and ammonia (NH₃). As NH₃ emissions are mostly generated by agriculture, a particular conflict of interest exists in areas where agricultural production systems are located nearby sensitive ecosystems, as often is the case in Switzerland. Therefore, this study aimed at quantifying and evaluating total N inputs to a mire in the Swiss Alpine foothills during 2007–2019, focusing on NH₃ dry deposition. Three surface–vegetation–atmosphere transfer models were used to estimate dry deposition of NH₃ based on micrometeorological data in combination with monthly passive sampler NH₃ concentration measurements. NH₃-N dry deposition summed up to 1.5–5.2 kg N ha^–1 a^–1, while total N loads were 11.5–14.2 kg N ha^–1 a^–1, well beyond the critical N loads for raised bogs (5–10 kg N ha^–1 a^–1), and also higher than the lower limits for oligotrophic fens and mountain hay meadows (10 kg N ha^–1 a^–1). Hence, the mire studied is most likely negatively affected by eutrophication, which could ultimately lead to biodiversity loss and ecosystem instability. This is particularly remarkable as the monthly NH₃ concentrations at the study site (0.4–4.7 µg m^–3) are comparatively low for Switzerland.

泥沼是受富营养化影响最大的生态系统之一，这些富营养化是通过氨（NH4+）、硝酸盐（NO ₃ ^–）、硝酸（HNO ₃）、二氧化氮（NO ₂）和氨（ NH ₃ )。由于 NH ₃排放主要由农业产生，因此在农业生产系统位于敏感生态系统附近的地区存在特殊的利益冲突，瑞士经常发生这种情况。因此，本研究旨在量化和评估 2007 年至 2019 年期间瑞士阿尔卑斯山脚下沼泽的总氮输入量，重点是 NH ₃干沉积。基于微气象数据结合每月被动采样器 NH ₃浓度测量值，使用三种地表-植被-大气转移模型来估计 NH _{3的干沉降。}NH ₃ -N 干沉降总和为 1.5–5.2 kg N ha ^–1 a ^–1，而总 N 负荷为 11.5–14.2 kg N ha ^–1 a ^–1，远高于凸起沼泽的临界 N 负荷 (5– 10 kg N ha ^–1 a ^–1 )，也高于贫营养沼泽和山地干草草地的下限 (10 kg N ha ^–1 a ^–1）。因此，所研究的泥潭很可能受到富营养化的负面影响，最终可能导致生物多样性丧失和生态系统不稳定。这一点尤其显着，因为瑞士研究地点的每月 NH _{3浓度（0.4–4.7 µg m} ^–3）相对较低。