- KOREAN
- P-ISSN2287-8327
- E-ISSN2288-1220
- SCOPUS, KCI
ISSN : 2287-8327
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Losses of Biomass and Mineral Nutrients during Decomposition of Herbaceous Plants in Riverine Wetlands
Abstract
The composition changes of litters were investigated to figure out the effects of the decompositionof Humulus japonicus on nutrient circulation and decomposition process in the riverine wetlands: Tan stream and Amsa-dong. Litterbags (mesh size 1 mm and 5 mm) were installed to monitor mass and nutrient changes of 5 types of litters: H. japonicus only, Miscanthus sacchariflorus only, Phragmites communis only, mixed litters including H. japonicus, and mixed litters without H. japonicus for 7 months. It was shown that k (decay rate) of the H. japonicus (2.68∼3.12) was higher than that of (1.83∼2.16) and P. communis (0.02∼1.18). The mass and organic remaings of the mixed litters including H. japonicus at Tan stream were 47.0∼55.1% and 47.0 ∼54.9% and those of the litterbags without H. japonicus were 49.2∼65.4 % and 47.1 ∼57.5%, respectively. This result indicated that the nutrient circulation was faster at H. japonicus community than others. Ca, Na, Mg, K, P, C, N and H contents reduced to around 40∼80% of original. However, Na concentration increased up to 407 ∼584% at 100 days and decreased to 248 ∼498% at the end of the experiment. Decomposition rates were similar between 1mm and 5mm mesh size litterbags and this implies that plant litters in studied areas decomposed mainly by microbes rather than small animals. This study revealed that the fast growth of H. japonicus was resulted from fast decomposition in part: positive feedback of nutrient cycling.
- keywords
- Decay constant, Change of nutrient contents, C/N ratio, Humulus japonicus, Riverine wetlandsKim, Sorin et al. J. Ecol. Field Biol. 29 (5) 470located in Amsa-dong and Tan stream. The Amsa-dong ecosystem preservation area is located near the Kwangnar
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