________________________________________________________________From the late Pleistocene to early Holocene in Japan, subtropical and temperate forest elements moved northwards. This affected human choices and access to food sources. More settled patterns of living spread northwards gradually, and northern hunting-gathering-fishing people began cultivating vegetables and cereal crops. This poster reports the presence of ancient starch residues on stone artefacts in Kagoshima Prefecture, southern Kyushu. The oldest residues recovered are dated by context to about 30,000 14 C yr BP. If such residues can be identified, it may be possible to detect a hypothesized early phase of tropical plant movement northwards during warmer climate peaks in the late terminal Pleistocene, as well as during the long period of Holocene warming that followed. As an initial step towards identification, the morphological characteristics and condition of the starch granules are described and compared to those of other sites in early Japan. ________________________________________________________________Résumé: Au Japon, de la fin du Pléistocène au début du Holocène les forêts subtropicales et tempérées se sont déplacées vers le nord. Cela a affecté les choix et l'accès à l'alimentation des peuplades. La plupart se sont déplacées peu à peu vers le nord et après s'être consacrées à la chasse, la cueillette et la pêche, commencèrent à cultiver des légumes et des céréales. Ce poster montre la présence d'anciens résidus d'amidon sur des artefacts en pierre à Kagoshima, dans le sud de Kyushu. Les résidus les plus anciens ont été datés au carbone 14 à environ 30 000 ans avant notre ère. Si de tels résidus peuvent identifiés, il peut être possible de détecter une hypothétique première phase du mouvement des plantes tropicales vers le nord durant les périodes les plus chaudes à la fin du Pléistocène, ainsi que durant la longue période de l'Holocène qui suivit. En tant que première étape de l'identification, la caractéristique et la condition des ________________________________________________________________Resumen: Desde finales del Pleistoceno a principios del Holoceno, el bosque subtropical y templado de Japó n se desplazó hacia el norte, circunstancia que afectó a la vida humana y su acceso a las fuentes de alimento. Los patrones de vida más sedentarios se fueron trasladando hacia el norte poco a poco y los pueblos cazadores-recolectores-pescadores del norte comenzaron a cultivar vegetales y cereales. Este cartel indica la presencia de antiguos residuos de almidó n sobre instrumentos de piedra en la Prefectura de Kagoshima, al sur de Kyushu. Los vestigios más antiguos recuperados se han fechado por el contexto en torno al 30.000, 14 añ os de radiocarbono antes del presente. Si pueden identificarse estos vestigios, es posible que se detecte una fase temprana de movimiento de plantas tropicales hacia el norte, durante los picos climáticos más cálidos de la ú ltima fase del Pleistoceno, y también durante el largo calentamiento del Hol...
This study examined starch granules from the dental calculus of specimens from the Epi-Jomon (Zoku-Jomon in Japanese, ca. 350 BCE–350 CE) period in Japan for taxonomic identification of plant food items and the reconstruction of human socioeconomic practices. Dental calculus was extracted from 21 individuals across six Epi-Jomon sites in Hokkaido. Moreover, 12 starch granules and starch clusters were recovered from nine individuals. The morphologies of the extracted starch granules were then classified into five types: elliptical, angular circular, polygonal, pentagonal, and damaged. Morphometric analysis indicated that a small portion of these starch granules may have derived from acorns, nuts, and bulb or tuber plants, with one starch granule supposedly from rice. Although extracted starch granules are poor predictors of food diversity at the individual level, the results can identify potential food sources of the surveyed population. This is the first study to determine how well plant microremains in dental calculus reflect a plant diet in the Epi-Jomon population. The starch granules discovered at the surveyed sites provide essential information about the utilization of plant species and cultural contacts in Hokkaido during this period. This is of great significance in reconstructing the Epi-Jomon subsistence patterns in Hokkaido and exploring cultural interactions between hunting-gathering-fishing and agrarian societies.
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