Vegetation Reconstruction in Gaomiao Basin of Qinghai-Tibet Plateau, China During Qijia Culture Period (4 200-3 600 cal. a BP) and Its Comparison with Present(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2019年第01期
- Page:
- 96-106
- Research Field:
- 水资源与环境
- Publishing date:
Info
- Title:
- Vegetation Reconstruction in Gaomiao Basin of Qinghai-Tibet Plateau, China During Qijia Culture Period (4 200-3 600 cal. a BP) and Its Comparison with Present
- Author(s):
- HOU Guang-liang; LI Sheng-mei; WEI Hai-cheng; HOU Xiao-qing
- 1. Qinghai Provincial Key Laboratory of Physical Geography and Environmental Processes, Qinghai Normal University, Xining 810008, Qinghai, China; 2. School of Geographic Science, Qinghai Normal University, Xining 810008, Qinghai, China; 3. Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, Qinghai, China
- Keywords:
- vegetation reconstruction; sporopollen; Qijia culture period; present; human activity; environmental evolution; valley; Qinghai-Tibet Plateau
- PACS:
- P534.6；K872
- DOI:
- -
- Abstract:
- Gaomiao Basin is an important area for the prehistoric culture of Qinghai-Tibet Plateau, and is also the most significant area of vertical zonality of vegetation in the northeast edge of Qinghai-Tibet Plateau, and is a typical area to reveal the interaction of natural environment and human activities. The chronology and sporopollen of Dianziping site in Gaomiao Basin were studied, and the regional vegetation status during Qijia culture period was rebuilt. The results show that the sporopollen assemblage is mainly composed of Pinus, Picea and Artemisia, with a few Betula, Carpinus, Ulmus, Hippophae, Chenopodiaceae and Asteraceae; according to the distribution characteristics of modern landform and vegetation in Gaomiao Basin, it is assumed that the vegetation types are forest and steppe during Qijia culture period (4 200-3 600 cal. a BP), the lower terrace mainly develops pine forests, followed by temperate deciduous broad-leaved trees, such as Ulmus, Carpinus and Alnus, which belong to temperate coniferous and broad-leaved mixed forest, the high terrace and middle mountainous mainly develop temperate steppe with Artemisia, and the shady slopes and valleys mainly develop Pinus and Picea; compared with modern vegetation, there is no pine forest in the low terrace of river valley, the northeast edge of Qinghai-Tibet Plateau, which is replaced by artificial vegetation, such as alamo forest; compared with Qijia culture period, the distribution areas of spruce and pine significantly shrink and distribute discontinuously as island disjunction only in the middle-high mountainous, so that the human activities in the historical period are presumed to be an important driving force of vegetation changes in river valley, the northeast edge of Qinghai-Tibet Plateau.
Last Update: 2019-01-25