ARE THE EFFECTS OF ECOSYSTEM NITROGEN SATURATION, INDUCED BY CHRONIC SIMULATED N DEPOSITION, RAPIDLY REVERSIBLE?
Date of Award
Open Access Master's Report
Master of Science in Forest Ecology and Management (MS)
Administrative Home Department
College of Forest Resources and Environmental Science
Committee Member 1
Committee Member 2
A novel follow-on study examines the recovery of ecosystem processes in 2018, following the cessation of chronic N deposition additions from 1994 to 2017 to a series of northern hardwood forest stands in Michigan. This recovery study focuses on the response to reduced N deposition of dissolved organic C (DOC) and dissolved organic N (DON) in soil solution and leaf litter N concentration. The findings suggest that even after N treatment to the system had stopped, N saturation was sustained, as soil solution outputs of nitrogen from the system were approximately equal to ambient N deposition inputs. Leaf litter N also remained elevated which could lead to a continuation of many of the other responses associated with elevated N, including elevated DOC leaching. The study sites continue to exhibit effects of N saturated ecosystem during the first year of recovery, but more time will be needed to fully understand the long term recovery effects reduced N inputs to the ecosystems.
Selan, Jeffrey M., "ARE THE EFFECTS OF ECOSYSTEM NITROGEN SATURATION, INDUCED BY CHRONIC SIMULATED N DEPOSITION, RAPIDLY REVERSIBLE?", Open Access Master's Report, Michigan Technological University, 2019.