Title: Picea mariana Growth, Leaf N Concentration and Assimilation in a Bog Exposed to Nitrogen Treatments, 2013-2015
Citation: Wieder, R.K., D.H. Vitt, M.A. Vile, J.A. Graham, J.A. Hartsock, H. Fillingim, M. House, J.C. Quinn, K.D. Scott, M. Petix, and K.J. McMillen. 2019. Picea mariana Growth, Leaf N Concentration and Assimilation in a Bog Exposed to Nitrogen Treatments, 2013-2015 ver 1. Environmental Data Initiative. https://doi.org/10.6073/pasta/6f83a1109497c097c8db32cc38e43d76
Study Site: Mariana Lake, Alberta
Purpose: Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. Bogs, being ombrotrophic, may be especially susceptible to increasing N deposition. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a bog near Mariana Lakes, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition).
Abstract: In September 2013-2015, we measured annual leader extension of Picea mariana on four trees (0.5-2.5 m tall) per plot. Using a visually estimated P. mariana density at Mariana Lakes Bog of 1 tree m-2, and N concentrations in P. mariana needles, we calculated annual N assimilation attributable to new needle production.
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Research:
Further Info:
Status: Complete
Keywords:
effects of disturbance,
vegetation,
nitrogen,
oil and gas,
Geographical coordinates: North: 55.90, South: 55.90 East: -112.09 West: -112.09
Bounding Temporal Extent: Start Date: 2013-09-01, End
Date: 2015-09-01
