首页|Seed bank has potential for the restoration of insectivorous plants in Janggun montane wetland
Seed bank has potential for the restoration of insectivorous plants in Janggun montane wetland
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NSTL
Janggun wetland is valuable in Korea because insectivorous plants including Utricularia yakusimensis and endangered species inhabit this wetland. However, insectivorous plants in this wetland are in danger of extinction due to its decreased water level. The objective of this study was to determine species composition and germination characteristics of seeds of insectivorous plants in Janggun wetland through seed bank analysis. A total of 5820 individuals of 29 species appeared in the seed bank, with Eriocaulon cmereum being the most abundant species. The number of emerged individuals decreased with the depth of seed bank. Shannon-Wiener diversity index of annual plants increased in the deeper seed bank. Regardless of the depth of seed bank, community overlap indices between seed banks and aboveground vegetation of the wetland were relatively high for annual plants than for perennials. For perennial plants, diversity indices were mostly high due to the lack of dominant species. Insectivorous plants, unlike their absence in the wetland vegetation in 2020, appeared in seed banks where shoots of Molirda japonica were rare and ground was inundated. It is thought that light and water level conditions for the germination and growth of insectivorous plants have not been satisfied in Janggun wetland due to water level decrease in drought years and the formation of dominant coirrmunities of M. japonica. This study proved the possibility of reemergence of insectivorous plants from soil seed banks if proper management is provided for water and M. japonica.
NSTL
