Abstract
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−2 year−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.
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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).
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Kim, S., Kim, Y., Kim, Y. et al. Effects of planting method and nitrogen addition on Sphagnum growth in microcosm wetlands. Paddy Water Environ 12 (Suppl 1), 185–192 (2014). https://doi.org/10.1007/s10333-014-0427-1
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DOI: https://doi.org/10.1007/s10333-014-0427-1