Datasets of the Boundary and Area of the Tibetan Plateau

Zhang, Yili; LI, Bingyuan; Du, Zheng

doi:10.3974/geodb.2014.01.12.v1

Cited by 164 publications

(179 citation statements)

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“…26–39°N) and has a large elevational range ( c . 100–8,844 m) (Zhang, Li, & Zheng, ). Given these dimensions, the region of the QTP is the largest ( c .…”

Section: Methodsmentioning

confidence: 99%

Mapping the genetic patterns of plants in the region of the Qinghai–Tibet Plateau: Implications for conservation strategies

Favre

Sui

et al. 2018

Diversity and Distributions

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Aim: Species diversity in the region of the Qinghai-Tibet Plateau has been extensively explored, whereas the distribution of genetic diversity remains poorly understood in this species-rich area, parts of which are listed as biodiversity hotspots. In this study, we aimed to map the patterns of genetic diversity and divergence of plant species in this region, and to identify potential evolutionary hotspots for conservation planning.Location: Region of the Qinghai-Tibet Plateau (QTP). Methods:We compiled published molecular data for 60 plant species, and calculated intra-population genetic diversity and inter-population genetic divergence using haplotype sequences (chloroplast or mitochondrial DNA). We analysed the relationships between genetic diversity and longitude, latitude and elevation. We mapped the landscapes of genetic diversity and divergence for each species in GIS, and combined the resulting landscapes in order to identify hotspots of high genetic diversity and divergence.Results: There were no significant relationships between genetic diversity and longitude, latitude and elevation. For most species, areas characterized by high genetic diversity and divergence were located across the Hengduan Mountains. Nine evolutionary hotspots across the region of the QTP were identified. Main conclusions:The Hengduan Mountains are a remarkable hotspot of all three dimensions of biodiversity (genes, species and ecosystems), yet patterns of genetic diversity were partially incongruent with the distribution of species diversity. For example, several hotspots of genetic diversity were located on the QTP proper, which is relatively species poor. This partial geographic mismatch between species and genetic diversity highlights the need to consider both aspects in conservation programs. Our study suggests that more protected areas in the region of the QTP need to be established in order to protect genetic diversity and thus adaptive potential. K E Y W O R D Sbiodiversity conservation, comparative phylogeography, evolutionary hotspots, genetic divergence, genetic diversity, Qinghai-Tibet Plateau, Quaternary refugia | 311 YU et al. Pedicularis kansuensisA,

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“…26–39°N) and has a large elevational range ( c . 100–8,844 m) (Zhang, Li, & Zheng, ). Given these dimensions, the region of the QTP is the largest ( c .…”

Section: Methodsmentioning

confidence: 99%

Mapping the genetic patterns of plants in the region of the Qinghai–Tibet Plateau: Implications for conservation strategies

Favre

Sui

et al. 2018

Diversity and Distributions

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“…The Qinghai‐Tibetan plateau (QTP) is the highest and largest plateau in the world, with a total surface of ~2.5 million km 2 (Zhang et al., ). The elevation of the central plateau exceeds, on average, 4500 m. In general, modern vegetation in the center of the QTP comprises alpine desert, steppe, and meadow (Scientific Expedition Team to the Qinghai‐Xizang Plateau, ; Ni and Herzschuh, ).…”

Section: Occurrence and Acceptance Status Of Apocynaceae Fossil Seedsmentioning

confidence: 99%

Asclepiadospermumgen. nov., the earliest fossil record of Asclepiadoideae (Apocynaceae) from the early Eocene of central Qinghai‐Tibetan Plateau, and its biogeographic implications

Rio

Wang

Liu

et al. 2020

American J of Botany

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Premise Apocynaceae is common in the fossil record, especially as seed remains from the Neogene of Europe and North America, but rare in Asia. Intrafamilial assignment is difficult due to the lack of diagnostic characters, and new fossil and modern data are needed to understand the paleobiogeography of this group. Methods We studied three Apocynaceae seed impressions from the Lower Eocene Niubao Formation, Jianglang village, Bangor County, central Qinghai‐Tibetan Plateau. Morphological data from living and fossil species were phylogenetically mapped to enable systematic assignment. Results We describe a new genus, Asclepiadospermum gen. nov., and two new species, A. marginatum sp. nov. and A. ellipticum sp. nov. These species are characterized by an elliptical seed, a margin surrounding the central part of the seed, and polygonal, irregular, and small epidermal cells, and differ mainly in terms of the size of the margin and the shape of the apex. All these characters indicate that this new genus belongs to the subfamily Asclepiadoideae (Apocynaceae). Conclusions These fossils represent the earliest fossil seed records of Asclepiadoideae. Asclepiadospermum indicates a humid tropical to subtropical flora during the early Eocene in central Tibet. Moreover, our discoveries indicate a close floristic connection between Eurasia and Africa during the early Eocene, which expands our knowledge of the floristic linkage between Tibet and other regions at that time.

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“…form the southern frontier of the Qinghai‐Tibetan Plateau (QTP), whereas the Hengduan Mountains of Southwest China define the plateau's southeastern margin (Fig. ; Zhang et al ., ). Unlike the continuous range of the Himalayas, the Hengduan Mountains constitute a series of parallel, mostly north–south running, high ridges (2000–6000 m a.s.l.…”

Section: Introductionmentioning

confidence: 97%

Evolutionary history of the subnival flora of the Himalaya‐Hengduan Mountains: first insights from comparative phylogeography of four perennial herbs

Luo

Yue

Sun

et al. 2015

Journal of Biogeography

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Aim The Himalaya-Hengduan Mountain (HHM) biodiversity hotspot including the 'sky islands' of Southwest China harbour exceptional plant diversity and endemicity at subnival summits (most of them exceeding 4300 m a.s.l.). This study is the first using a comparative phylogeographical framework to gain insights into the temporal origin of this highly fragmented subnival flora, and the historical factors shaping its genetic architecture as exemplified by four perennial herbs.Location Himalaya-Hengduan Mountains, China.Methods Based on nuclear and/or chloroplast (cp) DNA sequences for each of the four studied species, we performed AMOVA and mismatch distributional analyses to assess molecular structure, diversity and demographic history in relation to current and last glacial distributions using ecological niche modelling (ENM). Time-calibrated phylogenetic reconstructions of cpDNA data were used to infer species-specific stem and crown ages. ResultsOur time estimates suggest that these species originated during the Late Pliocene or early-to-mid Pleistocene, whereas their onset of diversification generally falls into the mid-Pleistocene. All four species exhibited island-like population genetic structures, with all of them showing signatures of recent population growth and/or spatial expansion based on cpDNA. By contrast, ENM indicated that species broad-scale distributions remained fairly stable over the last glacial/post-glacial cycle. Main conclusionsThe temporal origin of the four subnival HHM species is likely associated with tectonic changes in the region, while their near-simultaneous onset of diversification during the 'Naynayxungla Glaciation' (0.72-0.50 Ma) could reflect initial population divergence through climate-induced habitat fragmentation. Despite a rather stable distributional history, geographical population isolation and localized range expansion/contractions likely resulted in significant genetic structure and differentiation over the last glacial/ post-glacial cycle. Overall, the present results are strongly indicative of shared evolutionary histories and phylogeographical structures among subnival plants from the 'sky island system' of the HHM region.

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Datasets of the Boundary and Area of the Tibetan Plateau

Cited by 164 publications

References 0 publications

Mapping the genetic patterns of plants in the region of the Qinghai–Tibet Plateau: Implications for conservation strategies

Mapping the genetic patterns of plants in the region of the Qinghai–Tibet Plateau: Implications for conservation strategies

Asclepiadospermumgen. nov., the earliest fossil record of Asclepiadoideae (Apocynaceae) from the early Eocene of central Qinghai‐Tibetan Plateau, and its biogeographic implications

Evolutionary history of the subnival flora of the Himalaya‐Hengduan Mountains: first insights from comparative phylogeography of four perennial herbs

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