N water chemistry from small Arctic streams in relation to vegetation cover

• Main Authors: Holmboe, Cecilie Marie Hartvig, Riis, Tenna, Pastor, Ada
• Format: Dataset
• Language: English
• Published: PANGAEA 2024
• Subjects: Ammonium; Ammonium/Nitrate ratio; Arctic; Arctic_streams; Area/locality; Biomass; aboveground; Category; Country; Date; Description; Identification; LATITUDE; Literature based; LONGITUDE; Month; Name; Nitrate; Nitrogen; inorganic; dissolved; dissolved/Nitrogen; organic; dissolved ratio; total dissolved; Normalized Difference Vegetation Index; Organic carbon; soil; Precipitation; annual mean; Reference/source; streams; Subzone; Temperature; air; maximum; minimum; Polar Biology; Polar Research
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.965140; https://doi.org/10.1594/PANGAEA.965140

In the Arctic, little information is available, especially in terms of N availability and composition (i.e., nitrate, ammonium, and dissolved organic nitrogen) from small, flowing waters. This data set aims to quantify N concentrations across small Arctic streams and explore the link between terrestrial vegetation and stream water N concentration. The data set is the result of a literature study where data on N water chemistry was collected and combined from peer-reviewed, published articles and data sets selected by specific criteria. 20 articles met the selected criteria along with four datasets from databases resulting in a total of 2381 observations on N water chemistry from Arctic flowing waters from 1996 to 2021. Bioclimate subzones, NDVI and phytomass describe vegetation. Data on dissolved organic nitrogen (DON) was scarce: only 161 of the 2381 observations contained DON data. We found that nitrate (NO3-), ammonium (NH4+) and DON ranged undetectable to 1155, 547 and 1587 µg N/l, respectively. We found that sparsely vegetated areas had higher stream water N-concentrations, while barren areas and higher vegetated areas had lower stream water N-concentrations.