Point Frame Measurements of Poor Fen Moss and Vascular Frequencies Under Increasing N Deposition Over Five Years, 2011-2015

R Kelman Wieder, Dale H Vitt, Melanie A Vile, Jeremy A Graham, Jeremy A Hartsock, Jacqueline M.A. Popma, Hope Fillingim, Melissa House, James C Quinn, Kimberli D Scott, Meaghan Petix & Kelly J McMillen
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. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a poor fen near Mariana Lake, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). Anchored...
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