Flora and Vegetation Structure in a 15-Year-Old Artificial Wetland

Abstract

This study was conducted to investigate the flora and vegetation structure at a 15-year-old artificial wetland for the water purification in Jincheon, Korea. The percentage of species number of obligate wetland plants and facultative wetland plants totaled 40%, whereas that of obligate upland plants and facultative upland plants was 57%. This result showed that the artificial wetland in the study experienced terrestrialization. The number of annual and biennial plants that are pioneer vegetation in a successional stage was lower than that of perennial herbs as a result of the long-term stabilization of vegetation. From the results of DCA (detrended correspondence analysis), water depth played an important role on the classification of vegetation structure in an old artificial wetland. Species diversity was higher in the terrestrialized plant communities such as Iris pseudacorus and Aster koraiensis than in any other wetland communities. Plant communities could be classified according to the wetland indices; obligate upland for A. koraiensis community, facultative wetlands for Carex dispalata var. dispalata and I. pseudacorus community, and obligate wetlands for Nymphoides peltata, Nymphaea tetragona, Phragmites communis, Potamogeton maackianus, and Typha angustifolia community. In conclusion, this result suggests that wetland vegetation should be maintained against terrestrialization through the proper management of sedimentation and hydrological regime in an artificial wetland.

Successional changes in plant composition over 15 years in a created wetland in South Korea

“…The importance value (IV) was determined for each species (importance value = relative cover + relative frequency) as described previously (Schlising and Sanders 1982), and diversity was calculated using the Shannon diversity index (Shannon and Weaver 1949). We evaluated changes in wetland index for the four sub-wetlands over time using the community type wetland index (CTWI) (Son et al 2015;Chu et al 2016), which can be effective for monitoring sites or comparing sites with environmental differences (Coles-Ritchie et al 2007), using the following equation:…”

“…Despite the importance of created wetlands, scientific understanding of their long-term succession is lacking (Mitsch et al 2005). In South Korea, short-term studies (3-4 years) on created wetlands have been conducted, but longer-term studies for 10 years or longer are scarce (Kim and Myung 2008;Kim et al 2011;Son et al 2015). It is important to monitor the settlement patterns and changes in wetland plants after construction of wetlands.…”

Floristic study of lagoon areas on the eastern coast in Korean peninsula

“…습생 천이가 진행됨에 따라 유기물과 토양 침전물의 퇴 적, 지하수위 감소 등으로 습지식물이 육상식물로 점차 대체되고 잠식하게 된다 (Cronk and Fennessy, 2001). 영양 염류 흡수능, 수질 정화능, 서식처로서의 역할 등 정착된 식생이 발휘하는 본래의 기능을 지속적으로 유지하기 위 해서는 수심 관리와 토양 수분 보유능이 균등히 유지되어 수습생식물이 생육할 수 있도록 해야 한다 (Son et al, 2015). 석호의 식물 및 식생은 생산자로서의 역할과 다른 생물의 서식처 및 은신처 기능을 수행함으로서 다른 생물 군과의 연계성을 고려한 복원이 필요하다 (Ministry of Environment, 2008 364260,364439,364609,364677,410257,427822,427874,427891,427905,427921,456053,456199,456627,456742,456950 ; 399625, 399657, 410383, 410568, 410750, 456148, 456427, 456762, 457531, 457963, 489215, 489484, 489612 156186,307184,399254,399373,399437,410751,456534,456766,457221,457799,486756,486926,488532,489153 364281,364456,364610,364682,410288,410349,437339,437351,437642,437697,437898,456111,456637,456755,456920,479171 Taxa/Collection numbers (NIBRVP0000-)…”