| Budget Amount *help |
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1997: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1996: ¥900,000 (Direct Cost: ¥900,000)
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| Research Abstract |
The effects of land use in the areas surrounding In Akaiyachi Mire, Japan on the mire ecosystem were investigated in 1995. Types of land use in the areas adjacent to the mire were paddy agiculture, fallow paddies and buckwheat agriculture with a deep trench, Groundwater tables were monitored along five 90-m transect lines from the mire periphery inward, Groundwater tables were highest in early June and decreased towards September due to a low precipitation during the summer. Along one transect, the groundwater table descended from the mire periphery, adjacent to a rice paddy, inward, suggesting that groundwater and nutrient were seeping from paddies into the mire. Groundwater tables along the other transects were lowest at peripheral sites. The deep trenches in buckwheat fields seemed to cause the mire to dry up. Plant shoot heights were higher near the periphery than those at inner-mire sites. Photosynthetic and transpiration rates of Sasa palmata were also high at periphery sites. The descent of groundwater table due to trench construction and the seepage of fertilizer from Paddy fields seemed to expand the areas of S.palmata and Pinus densiflor a in Akaiyachi Mire. These plants were not reported to be present in the mire 30 years ago.
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