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HISTORY OF LARIX FOREST IN HOKKAIDO AND SAKHALIN, NORTHEAST ASIA SINCE THE LAST GLACIAL
Author(s): 
Pages: 524-533
Year: Issue:  4
Journal: ACTA PALAEONTOLOGICA SINICA

Keyword:  Larix pollenVegetation historyAfter 30 kaHokkaidoSakhalin;
Abstract: Larix pollen is abundant in the Last Glacial sediments of Sakhalin and Hokkaido islands. To clarify the relationbetween the pollen percentage of Larix and its stand density, surface samples from tundra, forest tundra and taiga in the FarEast Russia were analyzed. On the basis of surface pollen data, vegetation and climate since 30 ka in both islands werereconstructed. Around 30 ka, taiga of dominant Picea coexisted with Larix, Pinus and Abies was distributed in both islandsunder relatively colder and drier climate than at present. During the LGM, bog and taiga were mainly composed of Larix andPinus in Sakhalin, which could be correlated to the present northeast Siberian taiga. In Hokkaido, grassland and taiga weremainly consisted ofLarix, Pinus and Picea. Climate was colder anddrier than that around 30 ka. During Younger Dryas, foresttundra occurred in middle Sakhalin. In Hokkaido, contemporary vegetation was grassland and taiga characterized by thepredominance of Larix. Climate was colder and drier than at LGM. Larix began to decrease in both islands at 10 ka. Itdisappeared till 6 ka in Hokkaido, however it survived in Sakhalin until the present.
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