Historical relationship between Pasania edulis, the evergreen tree in rural natural environment, and human lives
2016
Terashima, Y. (University of the Ryukyus (Japan). Tropical Biosphere Research Center)
Pasania edulis is an indigenous evergreen broad-leaved tree species in Japan, belonging to Fagaceae. This species grows in a part of the laurel forest zone according to the forest division and in the location of the South Sea type in the climate division, and distributes in Okinawa Prefecture including southwest islands and western Kyushu, Wakayama Prefecture in Kii Peninsula, the southernmost end in Chiba and Kanagawa Prefectures in Kanto, and Kochi in Shikoku Island. The acorns have been used as a famine food since ancient times. Natural distribution has become unknown because the trees were planted in rural land to use logs for firewood and branches for sea weed production. The trees which were once actively planted and used in the human living were left without being utilized at present. Shiitake mushroom cultivation with wood and acorn cuisine are proposing. There is a momentum to use them little by little, however, overall usage is lacking. This paper recalls the history of the relationship between P. edulis and human living and introduces the recent research cases of effective tree usages for sustainable maintenance of forest functions.
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