In this study, we propose a method to create a Sphagnum wetland in an urban ecosystem by collecting basic information about Sphagnum growth and decomposition. We constructed six groups of Sphagnum microcosms (1 m × 1 m) with three replicates. A factorial design with two planting methods (capitulum without stem and capitulum with stem) and three levels of nitrogen addition (0, 2, and 6 g N m-2 year-1) were prepared. Changes in length, dry mass, and decomposition rates of Sphagnum were monitored over a growing season. The effect of N concentration on production varied for the different planting methods. Production of Sphagnum increased with N concentration in the capitulum without the stem treatment (-D) than in the with stem treatment (+D). Adding N affected the decomposition rate in both with and without stem treatments. Decomposition rate increased with added nitrogen. Planting without stems (-D) was an effective design for a high production and low decomposition of Sphagnum. Net primary production was 187-260 g m-2year-1 for dry mass and 15.5- 26.5 mm year-1 for length, whereas decomposition rates were 10.9-14.7 % mass loss per year. These values are comparable to those from natural bogs. The overall results indicate that constructing Sphagnum wetlands can be successfully employed as a greening technology in urban ecosystems, even in mid-latitudes.
Bibliographical noteFunding Information:
Acknowledgments This study was supported by the Center for Aquatic Ecosystem Restoration (CAER) of the Ecostar project from the Ministry of Environment (MOE), Republic of Korea (MOE; EW33-08-11. S. Kim was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (86457858).
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Agronomy and Crop Science
- Water Science and Technology