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http://dx.doi.org/10.11614/KSL.2022.55.4.406

Monitoring on Bolboschoenus planiculmis Restoration in Nakdong River Estuary: Implications for Wetland Restoration Using Shoot Transplantation  

Gu-Yeon Kim (Department of SciencesnEducation, Kyungnam University)
Hee Sun Park (Department of Integrated Biological Sciences, Pusan National University)
Hwa Young Kim (K-water)
Ji-Young Lee (K-water)
Publication Information
Korean Journal of Ecology and Environment / v.55, no.4, 2022 , pp. 406-414 More about this Journal
Abstract
Bolboschoenus planiculmis has been acknowledged as a key species in whooper swans (Cygnus cygnus) habitat by providing food for this migratory waterfowl. B. planiculmis wetlands are being degraded by water shortages and salinization caused by anthropogenic activities and climate changes. In 2004, the distribution of B. planiculmis in the tidal flats of the Nakdong Estuary was 2,475,568 m2, and in 2021, the distribution area was 798,731 m2, which decreased by 32.3%. In order to restore the degraded B. planiculmis wetlands, shoot transplantation and seed sowing were tentatively used in three places with different salinity and water levels. The average density per unit area in September at the optimal growth period after planting were A (fresh water level 50 cm) 58±15.65 m-2, B (brackish water level 0~5 cm) 188±63.83 m-2, C (brackish water level 0 cm or less) 188±45.13 m-2. The tubers were observed as A 0 g dw m-2, B 25.32±2.94 g dw m-2, and C 13.39±0.91 g dw m-2. Tubers were distributed in the soil, with only 3.0% at the 10~20 cm depth but 97.0% at the 0~10 cm depth. In contrast, the germination rate of B. planiculmis seeds was observed to be 0%. Results of this study provide technical support for the restoration of B. planiculmis wetland and the improvement in the quality of whooper swans habitat.
Keywords
Bolboschoenus planiculmis; Nakdong River Estuary; transplantation; restoration;
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