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Old February 6th, 2014, 05:09 PM   #1
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Satoama: the management of forests, water and lifestyle

Satoyama (里山?) is a Japanese term applied to the border zone or area between mountain foothills and arable flat land. Literally, sato (里) means arable and livable land or home land, and yama (山) means hill or mountain. Satoyama have been developed through centuries of small scale agricultural and forestry use.
The concept of satoyama has several definitions. The first definition is the management of forests through local agricultural communities. During the Edo era, young and fallen leaves were gathered from community forests to use as fertilizer in wet rice paddy fields. Villagers also used wood for construction, cooking and heating. More recently, satoyama has been defined not only as mixed community forests, but also as entire landscapes that are used for agriculture. According to this definition, satoyama contains a mosaic of mixed forests, rice paddy fields, dry rice fields, grasslands, streams, ponds, and reservoirs for irrigation. Farmers use the grasslands to feed horses and cattle. Streams, ponds, and reservoirs play an important role in adjusting water levels of paddy fields and farming fish as a food source.

Population, ownership, and land use
Population decline in villages has been a significant driving factor in the disappearance of satoyama from the Japanese landscape. Economic growth from 1955 to 1975 created significant social and economic gaps between cities and villages and led to the depopulation of mountain villages, where life was made difficult by natural conditions such as steep slopes, landslides, and snowfall. Ownership patterns have also been a factor. Shared ownership of satoyama forests near villages has been common since the beginning of 19th century. These forests were logged for economic considerations and the construction of houses. Because forests near villages have been cut down, old-growth forests today (including beech forests at high elevations) are often located far from villages. Inhabitants use wood from their private forests and conifer plantations for fuel. By the 1960s, satoyama were utilized as rice fields, plowed fields, shifting cultivation, grasslands, thatch fields, secondary forests for fuel, and giant bamboo forests.[2]

Various habitat types for wildlife have been provided by mixed satoyama landscape as a result of Japanese traditional agricultural system that also facilitates the movement of wildlife between a variety of habitats. The migration of wild animals can occur between ponds, rice paddies, grasslands, forests, and also from one village to another. Ponds, reservoirs, and streams in particular play a significant role in the survival of water dependent species such as dragonflies, and fireflies. In the early stages of their life cycle, they spend most of their time in water. Deciduous oaks such as Quercus acutissima and Quercus serrata are planted by farmers to maintain deciduous broad-leaf trees.[3] Succession to dense and dark laurel forest is prevented by farmers that cut down these trees for firewood and charcoal every 15 to 20 years. Many plant and animal species are able to live in these deciduous forests because of traditional management practices.

Causalities of the disappearance

Satoyama have been disappearing due to the drastic shift in natural resources from charcoal and firewood to oil and the change from compost to chemical fertilizer. Also, the problem of aging in Japanese society can cause the disappearance of satoyama because there are fewer people who can work in satoyama which are considered as intermediate disturbance on forests such as harvesting trees for timber and charcoal, cutting shrubs for firewood and collecting litter as compost. These human impacts can help the success of the forest occur. As the final causality of the disappearing of satoyama, pine dominated secondary forests in satoyama were increasingly destroyed since pine wilt disease devastated pine forests in the 1970s.[4][5]

Throughout the 80s and 90s, the satoyama conservation movement was implemented in Japan. As of 2001, there are more than 500 environmental groups that work for the conservation of satoyama. Because of their efforts, satoyama has become more prevalent in Japanese landscapes


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