DayCent-Chem simulations of ecological and biogeochemical processes of eight mountain ecosystems in the United States

Product Type: Scientific Investigations Report

Year: 2009

Author(s): Hartman, M.D., J.S. Baron, D.W. Clow, I.F. Creed, C.T. Driscoll, H.A. Ewing, B.D. Haines, J. Knoepp, K. Lajtha, D.S. Ojima, W.J. Parton, J. Renfro, R.B. Robinson, H. Van Miegroet, K.C. Weathers, and M.W. Williams

Suggested Citation:
Hartman, M.D., J.S. Baron, D.W. Clow, I.F. Creed, C.T. Driscoll, H.A. Ewing, B.D. Haines, J. Knoepp, K. Lajtha, D.S. Ojima, W.J. Parton, J. Renfro, R.B. Robinson, H. Van Miegroet, K.C. Weathers, and M.W. Williams. 2009. DayCent-Chem simulations of ecological and biogeochemical processes of eight mountain ecosystems in the United States: U.S. Geological Survey Scientific Investigations Report 2009–5150. 174 p.

Abstract

Atmospheric deposition of nitrogen (N) and sulfur (S) cause complex responses in ecosystems, from fertilization to forest ecosystem decline, freshwater eutrophication to acidification, loss of soil base cations, and alterations of disturbance regimes. DayCent-Chem, an ecosystem simulation model that combines ecosystem nutrient cycling and plant dynamics with aqueous geochemical equilibrium calculations, was developed to address ecosystem responses to combined atmospheric N and S deposition. It is unique among geochemically-based models in its dynamic biological cycling of N and its daily timestep for investigating ecosystem and surface water chemical response to episodic events...