Paleovegetation reconstruction of fossil forests dominated by Metasequoia and Glyptostrobus from the late Pliocene Kobiwako Group, central Japan
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概要
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A late Pliocene (1.8-1.9 Ma) wetland fossil forest community that was dominated by Metasequoia and Glyptostrobus was reconstructed based on the species composition of the stumps and other plant macrofossil assemblages. The plant fossils were recovered from a fossil forest preserved in deposits of the Kobiwako Group that are exposed in the Echi River, Shiga Prefecture, central Japan. Fossil wood of Metasequoia and Glyptostrobus was distinguished based on anatomical characteristics. Apportionment of the wood from different horizons in the fossil forest indicates Metasequoia grew over a long period of time in a stable environment, while Glyptostrobus and Alnus grew in unstable environments characterized by shortinterval floods. The fossil forest as a whole represents a fluvial back-marsh environment. The upland forest was composed of mixed evergreen conifers and deciduous broad-leaved trees including Chamaecyparis pisifera, Tsuga, Magnolia, and Acer. Aquatic and wetland herbs such as Cyperus, Carex, Scirpus, Polygonum, and Menyanthes grew in and around the wetland forest. The assemblage of fossil plants recovered from the fossil forest consists of plants that are currently distributed in the cool temperate climate zone, such as Picea, Thuja, Betula maximowicziana, Pterocarya rhoifolia, and Menyanthes trifoliata. Glyptostrobus is distributed only in subtropical areas at present, but it also grew under a cool temperate climate zone in Japan during the latest Pliocene.
- 日本古生物学会の論文
- 2008-06-30
著者
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綿野 泰行
千葉大学理学部生物学科
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綿野 泰行
東京大学理学部
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Matsumoto Midori
Graduate School Of Science Chiba University
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YAMAKAWA CHIYOMI
Lake Biwa Museum
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MOMOHARA ARATA
Graduate School of Horticulture, Chiba University
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NUNOTANI TOMOO
Lake Biwa Museum
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WATANO YASUYUKI
Graduate School of Science, Chiba University
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Momohara Arata
Graduate School Of Horticulture Chiba University
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Watano Y
Chiba Univ. Chiba Jpn
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Watano Yasuyuki
Chiba Univ. Chiba Jpn
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Watano Yasuyuki
Department Of Biology Graduate School Of Science Chiba University
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Watano Yasuyuki
Faculty Of Science Chiba University
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Watano Yasuyuki
Graduate School Of Science Chiba University
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Watano Yasuyuki
Department Of Biology Faculty Of Science Kanazawa University
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Watano Yasuyuki
Graduate School Of Science And Technology Chiba University
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Watano Y
Department Of Biology Faculty Of Science Chiba University
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Watano Yasuyuki
Laboratory For Plant Natural History Faculty Of Science Kanazawa University
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綿野 泰行
Department Of Biology Faculty Of Science Chiba University
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