scholarly journals Patterns of plant diversity at high altitudes on the Qinghai-Tibetan Plateau

2010 ◽  
Vol 3 (1) ◽  
pp. 1-7 ◽  
Author(s):  
A. Shimono ◽  
H. Zhou ◽  
H. Shen ◽  
M. Hirota ◽  
T. Ohtsuka ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Plant Diversity ◽  
High Altitudes

scholarly journals Soil fungal diversity in natural grasslands of the Tibetan Plateau: associations with plant diversity and productivity

2017 ◽  
Vol 215 (2) ◽  
pp. 756-765 ◽  
Author(s):  
Teng Yang ◽  
Jonathan M. Adams ◽  
Yu Shi ◽  
Jin-sheng He ◽  
Xin Jing ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Plant Diversity ◽  
Fungal Diversity ◽  
The Tibetan Plateau ◽  
Natural Grasslands ◽  
Soil Fungal Diversity

Metabarcoding of modern sedimentary DNA from the Tibetan Plateau and Siberia as a training dataset for vegetation reconstructions

2021 ◽  
Author(s):  
Weihan Jia ◽  
Kathleen Stoof-Leichsenring ◽  
Sisi Liu ◽  
Kai Li ◽  
Sichao Huang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Lake Sediments ◽  
Plant Diversity ◽  
Lake Water ◽  
Aquatic Plant ◽  
Freshwater Ecosystems ◽  
The Tibetan Plateau ◽  
Plant Dna ◽  
Continental Scale ◽  
Dna Metabarcoding

<p>Lake sedimentary DNA (<em>sed</em>DNA) is an established tool to trace past changes in vegetation composition and plant diversity. However, little is known about the relationships between sedimentary plant DNA and modern vegetational and environmental conditions. In this study, we investigate i) the relationships between the preservation of sedimentary plant DNA and environmental variables, ii) the modern analogue of ancient plant DNA assemblages archived in lake sediments, and iii) the usability of sedimentary plant DNA for characterization of terrestrial and aquatic plant composition and diversity based on a large dataset of PCR-amplified plant DNA data retrieved from 259 lake surface sediments from the Tibetan Plateau and Siberia. Our results indicate the following: i) Lake-water electrical conductivity and pH are the most important variables for the preservation of plant DNA in lake sediments. We expect the best preservation conditions for sedimentary plant DNA in small deep lakes characterized by high water conductivities (≥100 μS cm<sup>-1</sup>) and neutral to slightly alkaline pH conditions (7–9). ii) Plant DNA metabarcoding is promising for palaeovegetation reconstruction in high mountain regions, where shifts in vegetation are solely captured by the <em>sed</em>DNA-based analogue matching and fossil pollen generally has poor modern analogues. However, the biases in the representation of some taxa could lead to poor analogue conditions. iii) Plant DNA metabarcoding is a reliable proxy to reflect modern vegetation types and climate characteristics at a sub-continental scale. However, the resolution of the <em>trn</em>L P6 loop marker, the incompleteness of the reference library, and the extent of <em>sed</em>DNA preservation are still the main limitations of this method. iv) Plant DNA metabarcoding is a suitable proxy to recover modern aquatic plant diversity, which is mostly affected by July temperature and lake-water conductivity. Ongoing warming might decrease macrophyte richness in the Tibetan Plateau and Siberia, and ultimately threaten the health of these important freshwater ecosystems. To conclude, sedimentary plant DNA presents a high correlation with modern vegetation and may therefore be an important proxy for reconstruction of past vegetation.</p>

scholarly journals Genetic adaptation of Tibetan poplar ( Populus szechuanica var. tibetica ) to high altitudes on the Qinghai–Tibetan Plateau

2020 ◽  
Vol 10 (20) ◽  
pp. 10974-10985
Author(s):  
Chenfei Zheng ◽  
Lizhi Tan ◽  
Mengmeng Sang ◽  
Meixia Ye ◽  
Rongling Wu
Keyword(s):  
Tibetan Plateau ◽  
Genetic Adaptation ◽  
High Altitudes

Plant–soil feedbacks in a sub-alpine meadow ecosystem with high plant diversity on the Qinghai-Tibetan Plateau

Plant Ecology ◽  
2015 ◽  
Vol 216 (12) ◽  
pp. 1659-1674
Author(s):  
Jin Hua Li ◽  
Hua Zhang ◽  
Wen Jin Li ◽  
Johannes M. H. Knops
Keyword(s):  
Tibetan Plateau ◽  
Plant Diversity ◽  
Alpine Meadow ◽  
Plant Soil

Effects of grazing by large herbivores on plant diversity and productivity of semi-arid alpine steppe on the Qinghai-Tibetan Plateau

2015 ◽  
Vol 37 (4) ◽  
pp. 389 ◽  
Author(s):  
Hasbagan Ganjurjav ◽  
Min-jie Duan ◽  
Yun-fan Wan ◽  
Wei-na Zhang ◽  
Qing-zhu Gao ◽  
...  
Keyword(s):  
Species Diversity ◽  
Tibetan Plateau ◽  
Plant Community ◽  
Plant Diversity ◽  
Net Primary Productivity ◽  
Strong Impact ◽  
Aboveground Net Primary Productivity ◽  
Large Herbivores ◽  
Alpine Steppe ◽  
Semi Arid

Grazing by large herbivores may have a strong impact on plant diversity and productivity, but the effects are expected to vary with grazing pressure. The changes in productivity and species diversity of Stipa purpurea-dominated semi-arid alpine steppe grassland were measured under four different stocking rates of Tibetan sheep [no grazing, light (2.4 sheep units ha–1), moderate (3.6 sheep units ha–1), and heavy (6.0 sheep units ha–1) grazing] in a 5-year (2006–2010) grazing experiment on the Qinghai-Tibetan Plateau, China. Herbage mass and aboveground net primary productivity of alpine steppe declined significantly with increasing stocking rate (P < 0.05). Over the 5 years of the experiment, the proportion of forbs and sedges increased significantly under light and moderate grazing; the proportion of grasses decreased significantly, whereas the proportion of S. purpurea did not change compared with the no grazing treatment. Species diversity was highest under moderate grazing and was significantly higher than the no grazing treatment in 2 years (2008 and 2010). Moderate grazing enhanced the species diversity of the plant community due to an increase in the proportion of forbs. There were significant positive linear correlations between herbage mass and species diversity under no and light grazing. Species diversity was not related to productivity under moderate and heavy grazing. In conclusion, grazing by sheep reduced plant productivity; plant diversity increased under low and moderate grazing, and was as a result of changes in the composition of the plant community of a semi-arid alpine steppe.

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