Seasonal Nitrification in Three Agricultural Watersheds

This dataset accompanies the Vincent et al. research article in Biogeochemistry. We document nitrification rates across the four temporal seasons in three agriculturally-dominated watersheds in the Midwest, United States. Analysis demonstrates nitrification is a ubiquitous process, occurring during all seasons. PCA analysis demonstrates that organic carbon can be a potentially important source of ammonium for nitrifiers.However, elevated ammonium concentrations in impacted streams (e.g., agricultural or urban streams) did not correspond to increase nitrification rates.本数据集配套发表于《Biogeochemistry》（生物地球化学）期刊的Vincent等人研究论文。本数据集记录了美国中西部三个以农业为主的流域内，四个季节的硝化作用（nitrification）速率。分析结果显示，硝化作用是一种普遍存在的过程，在所有季节均会发生。主成分分析（PCA）结果表明，有机碳可作为硝化微生物获取铵态氮的潜在重要来源。然而，受干扰溪流（如农业或城市溪流）中升高的铵态氮浓度，并未与硝化作用速率的提升相对应。