Fluctuations of opal phytolith assemblage in the Tachikawa and Musashino Loam formations in southwest Kanto, central Japan: Changes in vegetation, climate, terrace, and soil-facies since marine isotope stage 5.1

隆, 佐瀬; 洋, 町田; 衛, 細野

doi:10.4116/jaqua.47.1

Cited by 15 publications

(5 citation statements)

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“…Research in soil science has generated a hypothesis concerning land use in the EUP for the Mt. Ashitaka area (Sase et al 2006(Sase et al , 2008Hosono and Sase 2015). Researchers studied buried paleosol layers from the UP sites in the Mt.…”

Section: Implications Of Study Results On Trapezoids From the Doteue ...mentioning

confidence: 99%

New Perspectives on the Behavioral Patterns of Early Modern Humans from the Japanese Islands

Yamaoka,

Ikeya,

Miyoshi

et al. 2023

MGfU

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This paper presents archaeological research of the Early Upper Paleolithic in the Japanese Islands, introducing the findings of recent research there into early modern humans. The authors provide background to the natural environment of the Upper Paleolithic while offering an overview of research in the area. Five important research topics, related to behavioral modernity of early modern humans, will be described. Based on them, new information and perspectives about the behavioral patterns of early modern humans are discussed with a focus on the Mt. Ashitaka area.

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Section: Implications Of Study Results On Trapezoids From the Doteue ...mentioning

confidence: 99%

New Perspectives on the Behavioral Patterns of Early Modern Humans from the Japanese Islands

Yamaoka,

Ikeya,

Miyoshi

et al. 2023

MGfU

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“…Global climate changes in temperature and precipitation, including snow depth, are expected to cause species turnover among Sasa species (Tsuyama et al, 2011). When the timescale is extended to the Quaternary, it is confirmed that the genus Sasa is replaced by the genus Pleioblastus and vice versa in response to climate change, as revealed by the identification of leaf siliceous bodies (Sase et al, 2008; Sase et al, 2011).…”

Section: Discussionmentioning

confidence: 97%

Competitive ability of dwarf bamboo (Sasa borealis) through long‐term clonal growth in mixed dwarf bamboo communities in the understory of a temperate deciduous forest

Niiyama,

Shibata,

Saitoh

et al. 2023

Plant Species Biology

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We investigated the clonal competition of three co‐occurring dwarf bamboo species, Sasa borealis, Sasa nipponica, and Sasaella ramosa, for 32 years in an old‐growth beech forest in central Japan. A study plot (10 m × 24 m) was established to examine the culm dynamics of these species. Sasa borealis had a competitive advantage over the other species. It invaded the other bamboo populations at a rate of 0.84–0.89 m/y from 1988 to 2020, while S. nipponica invaded at a rate of 0.17 m/y until 2003. After that, S. nipponica started to retreat at a rate of 0.85 m/y along with the invasion of S. borealis until 2020. The invasion rate of S. borealis did not change before and after the competition with S. nipponica. Our results showed that it would take 13.9–14.8 years from S. borealis invasion for S. nipponica to disappear. The density of S. ramosa decreased but it did not disappear from the plot because it retreated at a slow rate of 0.08 m/y. Sasa borealis almost achieved its potential maximum culm density, but the other two bamboo species did not. If stable conditions were maintained, S. borealis would continue to invade, dominate, and eliminate the other bamboo species. The ecological traits of dwarf bamboo species, such as the maximum density, size, and longevity of culms, are good indicators for assessing their competitiveness. Our findings demonstrate that dwarf bamboo species are actually replaced by another bamboo species in the forest understory during a long period.

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“…This shift of forest types roughly corresponds with the transition from Period I to Period III. In addition, opal phytolith analysis shows that grassland vegetation was causal in creating the Black Band II (s trata VII-IX: buried paleosol) in the Tachikawa Loam (Sase et al 2008). The expansion of grassland vegetation from Stratum X to Black Band II (strata VII-IX) roughly corresponds with a decrease of adzes.…”

Section: Period IIImentioning

confidence: 93%

Transitions in the Early Upper Palaeolithic: An Examination of Lithic Assemblages on the Musashino Upland, Tokyo, Japan

Yamaoka¹

2010

asi

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This article explains lithic assemblage transitions during the Early Upper Palaeolithic (EUP) on the Musashino Upland by quantitative comparisons of lithic raw materials, core reduction (blade technology), and formal tool production. The results suggest that changes in aspects of lithic assemblage variability could be explained by changes in raw material utilization, not developments (sophistication of tool-making skills) in blade technology and methods of formal tool production. The results also indicate the possibility that the changes in lithic raw material would have been affected by changes in residential mobility and the foraging territorial scale of EUP hunter-gatherers, as well as the changes in organic raw material utilization in whole technological organization in various environmental settings during the EUP. Beside them, the characteristics of the lithic assemblages in Period I as the initial EUP assemblages in this region are different from general characteristics of Upper Palaeolithic assemblages (blade technology, standardized and formal flaked tools) in Eurasia. The nature of lithic raw material utilization, especially flaked tool use, in Period I assemblages looks extremely expedient. Therefore, the characteristics of initial EUP assemblages in this region represent that diversity in lithic raw material utilization and technological organization was present during the EUP.

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Fluctuations of opal phytolith assemblage in the Tachikawa and Musashino Loam formations in southwest Kanto, central Japan: Changes in vegetation, climate, terrace, and soil-facies since marine isotope stage 5.1

Cited by 15 publications

References 5 publications

New Perspectives on the Behavioral Patterns of Early Modern Humans from the Japanese Islands

New Perspectives on the Behavioral Patterns of Early Modern Humans from the Japanese Islands

Competitive ability of dwarf bamboo (Sasa borealis) through long‐term clonal growth in mixed dwarf bamboo communities in the understory of a temperate deciduous forest

Transitions in the Early Upper Palaeolithic: An Examination of Lithic Assemblages on the Musashino Upland, Tokyo, Japan

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