Carbon and nitrogen cycling in tundra soils - Churchill

• Main Authors: Bedard-Haughn, Angela, Paré, Maxime
• Format: Dataset
• Language: English
• Published: Canadian Cryospheric Information Network 2009
• Subjects: Cape Churchill; Carbon; Carbon dioxide; Greenhouse gas; Landscape; Nitrogen; Nutrients; Soils; International Polar Year-Climate change impacts on Canadian Arctic tundra ecosystems Interdisciplinary and multi-scale assessments; Arctic; Climate change; International Polar Year; Tundra
• Online Access: https://dx.doi.org/10.5443/10960; https://www.polardata.ca/pdcsearch/?doi_id=10960

The landscapes were divided into five landform units: (1) upper slope, (2) back slope, (3) lower slope, (4) hummock, and (5) interhummock, which represented a great diversity of Static and Turbic Cryosolic soils including Brunisolic, Gleysolic, and Organic subgroups. Soil gross N mineralization was measured using the 15N dilution technique, whereas soil GHG emissions (N2O, CH4, and CO2) were measured using a multicomponent Fourier transform infrared gas analyzer. Soil organic matter characteristics were determined by (1) water-extractable organic matter, (2) density fractionation of SOM, and (3) solid-state CPMAS 13C nuclear magnetic resonance (NMR) spectroscopy. : Purpose: Knowledge of the ability of the soil to mineralize nitrogen (N) and release greenhouse gases (GHG) at the landscape scale is critical to predict and model future effects of climate change on Arctic soil organic matter (SOM). The objective was to examine how SOM characteristics influences soil gross nitrogen mineralization and soil carbon dynamics in several Arctic ecosystems. : Summary: Not Applicable