Agashashok White Spruce Needle Gas Exchange 2007-2008, Version 1.0

• Main Author: Sullivan, P.
• Format: Dataset
• Language: English
• Published: UCAR/NCAR - Earth Observing Laboratory 2008
• Subjects: Arctic; Ecology; FOS Biological sciences; ARCSS; NSF Arctic System Science
• Online Access: https://dx.doi.org/10.5065/d6h1304v; https://arcticdata.io/catalog/#view/doi:10.5065/D6H1304V

This dataset includes measurements of white spruce needle gas exchange made under conditions of saturating light, ambient CO2 and optimum temperature. Also included are needle C and N concentrations and needle d15N and d13C. Measurements were made at breast height on 36 trees exposed to 4 experimental treatments established in June of 2006 (i.e., n=9): control, fertilized, watered and fertilized x watered. Fertilized trees received 5 g N m-2 yr-1 applied as granular NH4NO3, 2 g P m-2 yr-1 applied as granular P2O5 and 4 g K m-2 yr-1 applied as granular K2O. The watering experiment was carried out using a passive throughfall displacement system that increased the size of each precipitation event (~2x). The study site is on a terrace next to the Agashashok River, Noatak National Preserve, AK (67.477, -162.216).