期刊
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
卷 530, 期 -, 页码 190-199出版社
ELSEVIER
DOI: 10.1016/j.palaeo.2019.05.037
关键词
Southwestern China; Plant diversity; Coniferous forest; Uplifting; Global cooling
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA20070201]
- Second Tibetan Plateau Scientific Expedition and Research [2019QZKK0707]
- National Natural Science Foundation of China [41620104002]
In this paper, we provide a late Miocene (Tortonian) to early Pleistocene (Gelasian) palynological record from the Eryuan Basin, Yunnan Plateau, China, to investigate plant diversity over this time. Between 7.6 and 4.3 Ma, the palynological assemblage was dominated by coniferous trees (70.2% on average), with subordinate amounts of broadleaved trees (8.8% on average). This suggests that the vegetation mainly comprised mixed forests, and that the climate was relatively warm and humid. After 4.3 Ma, the proportion of conifer pollen increased overall, and amount of cold-temperate coniferous forest Picea and Allies pollen, in particular, increased significantly (from 19.1% to 41.9%), concurrent with decreases in the pollen of broadleaved trees, shrubs, herbs, and other plant taxa. We suggest that these plant variations and overall reduced diversity may be responses to the tectonic uplift of the Yunnan Plateau and global cooling.
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