Baltimore Ecosystem Study Institute of Ecosystem Studies

2015 BES Annual Meeting Presentation and Poster Abstracts

Seasonal CO2 uptake, respiration and fluxes in forested stands and maintained vegetation around the Cub Hill Tower, Baltimore, MD
Hom, John
Co-Authors: John Hom, Nicanor Saliendra, Matthew Patterson, and Rodrigo Vargas

Abstract: The influence of anthropogenic CO2 emissions on forest carbon flux were estimated by comparing an urban tower at Cub Hill, MD with rural forests towers at Elk Neck State Park and NJ Pine Barrens. CO2 emissions around Cub Hill appear to be similar to ecosystem respiration, causing the annual net ecosystem exchange to be a net source. Despite this higher apparent respiration baseline due to emissions during the night and winter, the urban tower growing season uptake was higher and ecosystem respiration doubled compared to rural estimates. Prior studies indicated that soil respiration from lawns may contribute to this higher growing season ecosystem respiration. New studies using automated clear ecosystem chambers on lawns and forest floors for both daytime uptake and night time respiration confirms the season timing and magnitude of growing seasonal increases in gross ecosystem productivity and ecosystem respiration at the Cub Hill tower.