Abstract
Based on pollen records in B-3GC gravity core, environmental change since 9500 aBP of Okinawa Trough and its adjacent islands was derived. The result showed that the most time during this period was in a warm temperate climate except in middle Holocene (6800-4400 aBP) that was under subtropical climate control. During 9500–8300 aBP and 3100–2000 aBP periods, it appeared colder and drier than the rest time. The original area of pollen sources surrounding Okinawa Trough was covered by evergreen and deciduous broadleaf forest alternatively with mixed broad-leaf-conifer forest distributed in high mountainous areas. Usually, these three kinds of forests existed at the same time with difference in altitude. Pollen from subtropical and tropical plants increased obviously in about 5000–6000 aBP, reflecting a great lifting of vegetation zone and expansion of evergreen broad-leaf forest in the study area. However, there was a slight descending of plant zone and shrinking of evergreen broadleaf forest during 9500-8300 aBP and 3000-2000 aBP. During the remaining periods vegetation zone was higher than the present but in a limited range.
Similar content being viewed by others
References
Qin Yunshan, Zhao Yiyang, Chen Lrong et al., Geology of East China Sea (in Chinese), Beijing: Geological Publishing House, 1987, 1.
Yamanaka Tsugio, Forest Vegetation of Japan (in Japanese), Tokyo: Chikuchi-shokan, 1979, 1.
Miyawaki Akira, Vegetation of Japan (Kyoushu) (in Japanese), Tokyo: Chibendou, 1981, 2: 1.
Song Changqing, Wang Fengyu, Paleovegetational reconstruction through high resolution pollen analysis of Diaojiao Lake in Daqingshan Mts., Middle part of Inner Mongolia, North China, Scientia Geologica Sinica, 1995, Supplementary Issue (1): 215.
Song Changqing, Lu Houyuan, Sun Xiangjun, Establishment and application of transfer functions of the pollen-climatic factors in northern China, Chinese Science Bulletin (in Chinese), 1997, 42(20): 2182.
Stager, J. C., Mayewski, P. A., Abrupt Early to Mid-Holocene Climatic Transition Registered at the Equator and the Poles, Science, 1997, 276(20): 1834.
Baker, R. G., Gonzalez, L. A., Raymo, M. et al., Comparison of multiple proxy records of Holocene environments in the midwestern United States, Geology, 1998, 26(12): 1131.
Song Changqing, Wang Fengyu, Sun Xiangjun, Implication of paleovegetational changes in Diaojiao Lake, Inner Mongolia, Acta Botanica Sinica (in Chinese), 1996, 38(7): 568.
Jason, H., Curtis, D. A., Hodell, M. B., Climate variability on the Yucatan Peninsula (Mexico) during the past 3500 years, and implication for Maya cultural evolution, Quaternary Research, 1996, 46: 37.
Ken Sawada, Nobuhiko Handa, Variability of the path of the Kuroshio ocean current over the past 25,000 years, Nature, 1998, 392(9): 592.
Xuedong Xu, Motoyoshi Oda, Surface-water evolution of the eastern East China Sea during the last 36,000 years, Marine Geology, 1999, 156: 285.
Jian Zhiming, Saito Yoshiki, Wang Pinxian et al., Mainstream displacement of Kuroshio Current in past 20000 years, Chinese Science Bulltin (in Chinese), 1998, 43(5): 532.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Song, C., Sun, X. & Yoshiki, S. Paleoenvironmental information recorded by pollen in B-3GC gravity core in Okinawa Trough. Chin.Sci.Bull. 46, 938–942 (2001). https://doi.org/10.1007/BF02900471
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02900471