Impact of land-use change on biodiversity in Japanese agricultural ecosystem: landscape ecological approach for animal distribution in paddy fields

水稻抛荒使农业面积增加了10%，并造成了从水源地到草地的剧烈环境变化。本文对日本北方秋田县农业生态系统中被收养生物的物种丰富度进行了调查。研究结果表明，中度干扰下的弃耕地对稻田昆虫、蛙类和鸟类的栖息有积极的影响。 对于林下动物而言，废弃的稻田不割草会干扰其在林田间的活动，从而产生负面影响。通过调整撂荒草地的演替阶段和空间结构，可以控制撂荒对生物多样性的影响。

Paddy abandonment has increased up to 10% of all agricultural area, and it caused drastic environmental change from watered area to grassland. We investigated species richness of adopted organisms in agricultural ecosystem of Akita prefecture, northern Japan. Our results supported that abandoned paddies under intermediate disturbance had positive effect for insects, frogs and birds inhabiting in paddy field. For forested animals, abandoned paddies without mowing had negative effects for disturbing its movements between forest and paddies. The impact of abandonment on biodiversity was able to control by adjusting succession stage of abandoned grassland and its spatial configuration.