This file contains plant-available nitrate (NO3), ammonium (NH4), and phosphate (PO4) in the upper 5-10 cm of organic matter from a burned and unburned site in the southern section of the 2007 Anaktuvuk River fire in northern Alaska. Soil nutrients were assessed using ion-exchange resin membranes incubated in the soil during the growing season of 2016.
Data set ID:
EML revision ID:
Resin strips were placed in the intertussock spaces at a severely burned site and an unburned site (see Shaver and Rocha 2011a, b for site description). Sites are located within the southern section of the Anaktuvuk River Fire (ARF) scar approximately 37 km NW of Toolik Field Station in northern Alaska.
In 2016, plant-available N and P was assessed using ion-exchange membranes (GE Power and Water, via Maltz sales: anion model #3009749; cation model #3009753) cut into 12 cm2 strips deposited 10 cm below the soil surface. Membranes remained in the soil for 20 days. A set of membranes were placed at the burned and unburned sites during June, July and August in order to observe changes in nutrient concentrations over the growing season. At the end of the 20 days, membranes were removed, rinsed with deionized water and extracted using 35 mL of 2M KCl. Between sampling periods, membranes were recharged using 0.5M HCl to remove lingering ions and then 0.5M NaHCO3 to neutralize the strips.
Detailed site descriptions are published in
Rocha, A.V. and G.R. Shaver, 2011, Ecological Applications, v21, pg 477 and Rocha, A.V. and G.R. Shaver, 2011, Global Change Biology, v17, pg 2831.
Version 1, August 2020: Initial release
Version 2, August 2020: Define acronyms
Full Metadata and data files (either comma delimited (csv) or Excel) - Environmental Data Initiative repository.
Use of the data requires acceptance of the data use policy --> Arctic LTER Data Use Policy