Pliocene flora and paleoenvironment of Zanda Basin, Tibet, China  

作　　者：Jian HUANG Tao SU Shufeng LI Feixiang WU Tao DENG Zhekun ZHOU 

机构地区：[1]CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Xishuangbanna 666303,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,China [4]Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China [5]Center for Excellence in Life and Paleoenvironment,Chinese Academy of Sciences,Beijing 100044,China

出　　处：《Science China Earth Sciences》2020年第2期212-223,共12页中国科学（地球科学英文版）

基　　金：supported by the Strategic Priority Research Program of CAS(Grant Nos.XDA2007030102,XDB26000000,XDA20070203);the Second Tibetan Plateau Scientific Expedition and Research(STEP)(Grant No.2019QZKK0705);the NSFC-NERC(the National Natural Science Foundation of China-Natural Environment Research Council of the United Kingdom)joint research program(Grant Nos.41661134049,NE/P013805/1);the Youth Innovation Promotion Association,CAS(Grant No.2017439);the Key Research Program of Frontier Sciences,CAS(Grant No.QYZDB-SSW-SMC016)

摘　　要：This paper describes a plant megafossil assemblage from the Pliocene strata of Xiangzi, Zanda Basin in the western Qinghai-Tibet Plateau. Twenty-one species belonging to 12 genera and 10 families were identified. Studies show that the Pliocene vegetation in Zanda Basin was mostly deciduous shrub composed of Cotoneaster, Spiraea, Caragana, Hippophae,Rhododendron, Potentilla fruticosa, etc. Leaf sizes of these taxa were generally small. Paleoclimate reconstruction using Coexistence Analysis and CLAMP showed that this area had higher temperature and precipitation in the Pliocene than today, and distinct seasonal precipitation variability was established. The reconstructed paleoelevation of Zanda Basin in the Pliocene was similar to modern times. In the context of central Asian aridification, the gradual drought in the area beginning in the late Cenozoic caused vegetation to transition from shrub to desert, and the flora composition also changed.This paper describes a plant megafossil assemblage from the Pliocene strata of Xiangzi, Zanda Basin in the western Qinghai-Tibet Plateau. Twenty-one species belonging to 12 genera and 10 families were identified. Studies show that the Pliocene vegetation in Zanda Basin was mostly deciduous shrub composed of Cotoneaster, Spiraea, Caragana, Hippophae,Rhododendron, Potentilla fruticosa, etc. Leaf sizes of these taxa were generally small. Paleoclimate reconstruction using Coexistence Analysis and CLAMP showed that this area had higher temperature and precipitation in the Pliocene than today, and distinct seasonal precipitation variability was established. The reconstructed paleoelevation of Zanda Basin in the Pliocene was similar to modern times. In the context of central Asian aridification, the gradual drought in the area beginning in the late Cenozoic caused vegetation to transition from shrub to desert, and the flora composition also changed.

关 键 词：Qinghai-Tibet Plateau CENOZOIC PLIOCENE Plant fossils PALEOVEGETATION PALEOCLIMATE Environmental change 

分 类 号：Q914[天文地球—古生物学与地层学]