| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
In Japan, the effects of farm-pond and paddy-field constructions on the diversity of aquatic microcrustaceans remain unclear. By investigating the geographic structures of genetic compositions in farm-pond and paddy-field zooplankton, this study tried to approve the hypothesis that farm-pond and paddy-field constructions have increased the population sizes of zooplankters there, which had been distributed in floodplains before such constructions. The obtained results in the genetic analysis, including the genotyping by sequencing, of the genus Diaphanosoma and the genus Moina in Japan, suggested that farm-pond and paddy-field dwelling species at present have higher dispersal abilities than those in their counterparts. It is therefore argued that historical farm-pond and paddy-field constructions have functioned to stabilize/increase the population size of animals that had been distributed in floodplains prior to the construction of farm-pond and paddy-field.
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