Lieb, A.M., A. Darrouzet-Nardi, and W.D. Bowman. 2011. Nitrogen deposition decreases acid buffering capacity of alpine soils in the southern Rocky Mountains. Geoderma 164: 220-224.
Bowman, W.D., C.C. Cleveland, L. Halada, J. HreÅ¡ko, and J.S. Baron. 2008. Negative impact of nitrogen deposition on soil buffering capacity. Nature Geoscience 1: 767-770
Bowman, W.D., J.L. Gartner, K. Holland, and M. Wiedermann. 2006. Nitrogen critical loads for alpine vegetation and terrestrial ecosystem response - Are we there yet? Ecological Applications 16: 1183-1193.
Niwot LTER researchers Isabel Ashton and John Murgel measure species composition in plots near Chapin Pass, Rocky Mountain National Park, as part of a project comparing vegetation responses to N deposition in the park with NWT LTER. Results of this project are informing land managers involved with determining limits on emissions of reactive N in Colorado.
Cover (a, symbols are means+s.e.m., n=5) and rate of change in cover (b, each plot represented by a triangle) forCarex rupestrisin an alpine dry meadow in Rocky Mountain National Park subjected to ambient deposition (control), and additions of 5, 10, and 30 kg N ha-1 yr-1. The extrapolation of the line to the x-axis in b provides an estimate of the threshold of N input at which significant increases in cover ofC. rupestrisoccurs due to N deposition. (from Bowman, WD, J. Murgel, T. Blett, and E. Porter.
In rev. Journal of Environmental Management) Nitrogen Critical Loads for Alpine Vegetation and Soils in Rocky Mountain National Park)