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Study of evaluation method of the effect on the preservation of ecosystem by the land use condition of paddy field


, : Study of evaluation method of the effect on the preservation of ecosystem by the land use condition of paddy field. Journal of the Faculty of Agriculture Kyushu University 53(1): 221-225

The objective of this study is evaluating the effect of the land use condition on the ecological system in the rural area. The field observation was conducted in a 600 ha study site, which is located on the left bank of the Chikugo River in Kyushu Island, Japan. The living thing and ecosystem were investigated in a paddy field, rotated field, and ponded fallow field located in the study site.In the ponded fallow field, many kinds of the living things, including the primary and secondary consumers, can be observed, comparing with in the rotated field, and the food pyramid is formed. The observation result showed that the ponded fallow field had a function very high as a habitat of living things.From the land use condition map, the behavior range of the little egret in the object area is predicted. It was expected that the behavior range area of a little egret is divided, because there was no place used as a relay base of movement between western ponded fallow fields. Moreover, zoning for forming an ecological corridor in the study area was performed using this technique.The numerical model about biodiversity was calculated from results of the investigation, and the land use condition which multifunctionality can demonstrate effectively was analyzed. Furthermore, the correlation diagram of multifunctionality and the land use condition of the paddy field was presumed. It becomes a leading technique to evaluate multifunctionality synthetically and create a correlation diagram, when deciding upon a rural land use plan.

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