Rise of herbaceous diversity at the southeastern margin of the Tibetan Plateau: First insight from fossils

doi:10.1111/jse.12755

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	Rise of herbaceous diversity at the southeastern margin of the Tibetan Plateau: First insight from fossils
	Huang,Yong-Jiang ; Zhu,Hai; Su,Tao ; Spicer,Robert A.; Hu,Jin-Jin ; Jia,Lin-Bo ; Zhou,Zhe-Kun
	2021
发表期刊	JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN	1674-4918
摘要	The Hengduan Mountains region (HMR) on the southeastern Tibetan Plateau, supports a high diversity of herbs, particularly in its subalpine to alpine ecosystems, due to high altitude and cool temperate climate. Current understanding on the formation of such herbaceous richness is based chiefly on molecular phylogenies; however, direct geological evidence is lacking because herbs are rarely preserved as macroscopic fossils. In this study, we present abundant fossil fruits and seeds of herbs from the late Pliocene Heqing Basin in the southern HMR. Our systematic analysis shows the presence of at least 18 species belonging to 11 genera, that is, Ranunculus, Corydalis, Rumex, Polygonum, Chenopodium, Stellaria, Fragaria, Astragalus, Aster, Carex, and Schoenoplectus, of which Polygonum is most abundant followed by Astragalus. This finding throws the first light from fossil evidence on the rise of herbaceous diversity in the region. We interpret the local assembly of these herbs as resulting from rapid pre-Pliocene species diversifications of many herbaceous groups in the HMR. As nowadays most of these herbs grow primarily in meadows and a few occur as subaquatic plants, we suggest an open meadow hosting some scattered shrubs in the vicinity of a vegetated wetland in the Heqing Basin during the late Pliocene. This provides the first direct evidence of past treeless open vegetation within the HMR and thus improves our knowledge of vegetation evolution in the region. We suggest that the uplift-induced climate cooling and monsoon-associated precipitation seasonality are potentially the key driving forces for the opening of meadow vegetation in the HMR.
关键词	fossil carpology Hengduan Mountains late Pliocene meadow monsoon Tibetan Plateau LATE PLIOCENE HENGDUAN MOUNTAINS MOLECULAR PHYLOGENY EVOLUTIONARY HISTORY PLANT DIVERSITY YUNNAN CHINA BIODIVERSITY MONSOONS CLIMATE
DOI	10.1111/jse.12755
WOS记录号	WOS:000681357000001
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73615
专题	中国科学院昆明植物研究所
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Biodivers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 3.Shangrao Normal Univ, Coll Life Sci, Shangrao 334001, Jiangxi, Peoples R China 4.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 5.Spicer, Robert A.] Open Univ, Sch Environm Earth & Ecosyst Sci, Milton Keynes MK7 6AA, Bucks, England
推荐引用方式 GB/T 7714	Huang,Yong-Jiang,Zhu,Hai,Su,Tao,et al. Rise of herbaceous diversity at the southeastern margin of the Tibetan Plateau: First insight from fossils[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2021.
APA	Huang,Yong-Jiang.,Zhu,Hai.,Su,Tao.,Spicer,Robert A..,Hu,Jin-Jin.,...&Zhou,Zhe-Kun.(2021).Rise of herbaceous diversity at the southeastern margin of the Tibetan Plateau: First insight from fossils.JOURNAL OF SYSTEMATICS AND EVOLUTION.
MLA	Huang,Yong-Jiang,et al."Rise of herbaceous diversity at the southeastern margin of the Tibetan Plateau: First insight from fossils".JOURNAL OF SYSTEMATICS AND EVOLUTION (2021).

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