Date of Award
2010
Degree Type
Thesis
Degree Name
Master of Science
Program
Biology
Supervisor
Dr. Hugh Henry
Second Advisor
Dr. Irena Creed
Third Advisor
Dr. Norm Hüner
Abstract
Global warming and increased atmospheric nitrogen deposition are expected to alter the carbon balances of ecosystems over the next century. My study measured net ecosystem CO2 exchange (NEE) in response to warming and nitrogen addition in a temperate old field using open system canopy chambers. Additionally, I assessed the indirect effects of warming and nitrogen addition on NEE caused by changes in aboveground productivity. In both 2009 and 2010, the study system was a net source of carbon, with the highest CO2 efflux during mid-summer. Warming and nitrogen addition did not affect NEE patterns in both years, notwithstanding a significant nitrogen effect on aboveground biomass in 2010. These findings suggest that the NEE of the study site was dominated by ecosystem respiration, which correlated strongly with soil temperature.
Recommended Citation
Kim, Min Ku, "INTERACTIVE EFFECTS OF WARMING AND NITROGEN DEPOSITION ON NET ECOSYSTEM CO2 FLUX IN A TEMPERATE OLD FIELD." (2010). Digitized Theses. 4392.
https://ir.lib.uwo.ca/digitizedtheses/4392