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The computer programs\nare based on the following assumptions: (1) Population grows exponentially,\nwith the equation Nt=No*evt; (2) there is an upper\nlimit to population size in a given area, termed carrying capacity\n(K); and (3) at the level K, population growth stops. In this program,\nwe divided Japan into nine regions, such that when population\nreaches the level K, the surplus migrates to other areas, according to\nprobablistic models.\nIn dealing with carrying capacity, we initially assign the constant\nM, a hypothetical population maximum for an area; subsequently\nM is converted to K as a consequence the impact of climate and\ntechnology.\nPollen analysis indicates significant climatic change during the\nJomon Period. This was precipitated by a warming trend, which\nbegan after the last glacial, and continued until about 6000 B.P.,\nfollowed by a cooling trend which lasted until about 2000 B.P.\nThis climatic wave caused significant change in the vegetation of the\nJapanese archipelago. In the East during the warming trend,\nconiferous forests were replaced by deciduous Fagus-Quercus forests,\ncomprised of a variety of nut-bearing trees, which constituted an\nimportant food source for the Jomon people. However, the nutbearing\ntrees are sensitive and often succumb in cold weather. Based\non these facts, we assume that carrying capacity increased during the\nwarming trend and decreased during the cooling trend in the regions\nof East Japan. In West Japan, however, Yasuda [1980] suggests\nthat during the warming trend the environment deteriorated owing to\ndry summers. So here we assume that carrying capacity declined\nduring the warming trend and then remained constant.\nThe technology of Jomon food production, including the tool\nelements used for hunting, fishing and gathering, are well known from\nan early stage in East Japan. Thus we assume that although tools must\nhave been refined and systematized as Eastern Jomon technology\ndeveloped, they were not powerful enough to influence carrying\ncapacity, because the system did not prevent population decline in the\ncooling period. By contrast, farming, the true technological innovation,\nintroduced from the Asian continent to Kyushu, changed\nJomon society into an agricultural one. In this simulation we stipulate\nthat when rice is introduced into a region it not only doubles the\nratio of population growth but also increases carrying capacity\n(five times).\nThe results were compared with earlier estimates [KOYAMA 1978]\nbased on the number of sites. Both data coincide well, especially\nwith respect to the population curve throughout the Jomon period.\nIn the East this curve shows a sharp increase of population until the\nMiddle Phase, where a rapid decline is observed (Late Phase). In\nthe West population remained almost constant throughout the entire\nperiod. 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縄文人口シミュレーション
https://doi.org/10.15021/00004436
https://doi.org/10.15021/00004436f38efc37-987e-413e-b74b-d661648ae671
名前 / ファイル | ライセンス | アクション |
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KH_009_1_001.pdf (2.2 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||
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公開日 | 2010-02-16 | |||||||||||
タイトル | ||||||||||||
タイトル | 縄文人口シミュレーション | |||||||||||
タイトル | ||||||||||||
言語 | en | |||||||||||
タイトル | A Study of Jomon Population : Computer Simulation Analysis | |||||||||||
言語 | ||||||||||||
言語 | jpn | |||||||||||
資源タイプ | ||||||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
資源タイプ | departmental bulletin paper | |||||||||||
ID登録 | ||||||||||||
ID登録 | 10.15021/00004436 | |||||||||||
ID登録タイプ | JaLC | |||||||||||
著者 |
小山, 修三
× 小山, 修三
WEKO
7368
× 杉藤, 重信 |
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抄録 | ||||||||||||
内容記述タイプ | Abstract | |||||||||||
内容記述 | This paper applies techniques of computer simulation to the analysis of Jomon demographic patterns. The computer programs are based on the following assumptions: (1) Population grows exponentially, with the equation Nt=No*evt; (2) there is an upper limit to population size in a given area, termed carrying capacity (K); and (3) at the level K, population growth stops. In this program, we divided Japan into nine regions, such that when population reaches the level K, the surplus migrates to other areas, according to probablistic models. In dealing with carrying capacity, we initially assign the constant M, a hypothetical population maximum for an area; subsequently M is converted to K as a consequence the impact of climate and technology. Pollen analysis indicates significant climatic change during the Jomon Period. This was precipitated by a warming trend, which began after the last glacial, and continued until about 6000 B.P., followed by a cooling trend which lasted until about 2000 B.P. This climatic wave caused significant change in the vegetation of the Japanese archipelago. In the East during the warming trend, coniferous forests were replaced by deciduous Fagus-Quercus forests, comprised of a variety of nut-bearing trees, which constituted an important food source for the Jomon people. However, the nutbearing trees are sensitive and often succumb in cold weather. Based on these facts, we assume that carrying capacity increased during the warming trend and decreased during the cooling trend in the regions of East Japan. In West Japan, however, Yasuda [1980] suggests that during the warming trend the environment deteriorated owing to dry summers. So here we assume that carrying capacity declined during the warming trend and then remained constant. The technology of Jomon food production, including the tool elements used for hunting, fishing and gathering, are well known from an early stage in East Japan. Thus we assume that although tools must have been refined and systematized as Eastern Jomon technology developed, they were not powerful enough to influence carrying capacity, because the system did not prevent population decline in the cooling period. By contrast, farming, the true technological innovation, introduced from the Asian continent to Kyushu, changed Jomon society into an agricultural one. In this simulation we stipulate that when rice is introduced into a region it not only doubles the ratio of population growth but also increases carrying capacity (five times). The results were compared with earlier estimates [KOYAMA 1978] based on the number of sites. Both data coincide well, especially with respect to the population curve throughout the Jomon period. In the East this curve shows a sharp increase of population until the Middle Phase, where a rapid decline is observed (Late Phase). In the West population remained almost constant throughout the entire period. During the Jomon, the distribution of pupolation was high in the East, whereas in the Yayoi it was high in the West—representing a complete reversal between the two periods. |
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書誌情報 |
国立民族学博物館研究報告 en : Bulletin of the National Museum of Ethnology 巻 9, 号 1, p. 1-39, 発行日 1984-03-31 |
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ISSN | ||||||||||||
収録物識別子タイプ | ISSN | |||||||||||
収録物識別子 | 0385-180X | |||||||||||
書誌レコードID | ||||||||||||
収録物識別子タイプ | NCID | |||||||||||
収録物識別子 | AN00091943 | |||||||||||
著者版フラグ | ||||||||||||
出版タイプ | VoR | |||||||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||
出版者 | ||||||||||||
出版者 | 国立民族学博物館 | |||||||||||
出版者(英) | ||||||||||||
出版者 | National Museum of Ethnology |