2001 Fiscal Year Final Research Report Summary
THE STUDY ON THE NATURAL AND CULTURAL ENVlRONMENTS IN PREHISTORIC JAPAN
| Project/Area Number |
09208101
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas (A)
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| Allocation Type | Single-year Grants |
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
KOIZUMI Itaru HOKKAIDO UNIVERSITY, GRADUATE SCHOOL OF SCIENCE, PROFESSOR EMER., 名誉教授 (20029721)
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| Co-Investigator(Kenkyū-buntansha) |
YASUDA Yoshinori INTERNATIONAL RESEARCH CENTER FOR JAPANESE STUDIES, PROFESSOR., 研究部, 教授 (50093828)
MINAKAWA Masao HOKKAIDO UNIVERSITY, GRADUATE SCHOOL OF ENVIRONMENTAL EARTH SCIENCE, PROFESSOR., 大学院・地球環境科学研究科, 教授 (10250507)
OOBA Tadamichi HOKKAIDO UNIVERSITY, GRADUATE SCHOOL OF ENVIRONMENTAL EARTH SCIENCE, PROFESSOR., 大学院・地球環境科学研究科, 教授 (60013588)
SATO Yo-ichiro SHIZUOKA UNIVERSITY, FACULTY OF AGRICULTURE, ASSOCIATE PROFESSOR., 農学部, 助教授 (20145113)
TADA Ryuichi UNIVERSITY OF TOKYO, GRADUATE SCHOOL OF SCIENCE, PROFESSOR., 大学院・理学系研究科, 教授 (30143366)
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| Project Period (FY) |
1997 – 2000
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| Keywords | δ13C / δ15N / C3PLANTS / DISPERSAL OF RICE / WILD BOAR / PIG / JOMON PERIOD / 1700-YEAR CYCLICITY |
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| Research Abstract |
1. INCREASES IN CRUSTIC MATERIALS FROM THE JAPANESE ISLANDS SHOW A 1700-YEAR CYCLICITY THROUGH THE LAST INTERGLACIAL PERIOD. THIS PROVES THAT, BECAUSE THE INCREASED MEAN ACCELARATED CHEMICAL WEATHERING DURING WARM PERIODS, SUMMER SURFACE TEMPERATURES FLUCTUATED BETWEEN 22℃ AND 25℃ IN THE 1700-YEAR CYCLE, WHILE WlNTER SURFACE TEMPERATURES WERE FIXED AROUND 10℃ WITHOUT SIGNIFICANT FLUCTUATIONS.
2. C4 PLANTS SEEM TO HAVE BEEN POTENTIALLY UTILIZED IN THE JOMON ERA, BUT TO HAVE DECLINED SlNCE THE YAYOI.
3. IT SEEMS POSSIBLE THAT IMMIGRANT POPULATIONS DID NOT INTRODUSE CULTIVATED RICE AND THE TECHNOLOGY OF RICE FARMING AT THE SAME TIME.
4. DNA PROFILES OF EXCAVATED SUS BONES PROVE THAT SUS SCROFA LEUCOMYSTAX WERE BROUGHT FROM HONSHU INTO HOKKAIDO DURING THE JOMON TO EPI-JOMON PERIODS, AND THAT NORTHERN SUS SCROFA WERE ALSO BROUGHT INTO HOKKAIDO VIA SAKHALlN DURING THE OKHOTSK PERIOD, EVEN THROUGH MORPHOLOGICAL MEASUREMENTS OF THE EXCAVATED SKULLS DO NOT SHOW ANY SIGNIFICANT DIFFERENCES FROM MEASUREMENTS OF OTHER SKULLS BELONGING TO SUS SCROFA LEUCOMYTAX.
5. DURING THE FINAL JOMON TO YAYOI PERIODS, DOMESTICATED PIGS FROM THE CONTINENT WERE NOT YET RAISED IN THE JAPANESE ISLANDS.
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