scholarly journals Revealing Fungal Communities in Alpine Wetlands through Species Diversity, Functional Diversity and Ecological Network Diversity

2020 ◽  
Vol 8 (5) ◽  
pp. 632 ◽  
Author(s):  
Fei Xie ◽  
Anzhou Ma ◽  
Hanchang Zhou ◽  
Yu Liang ◽  
Jun Yin ◽  
...  
Keyword(s):  
Species Diversity ◽  
Community Diversity ◽  
Fungal Communities ◽  
Tibet Plateau ◽  
Sampling Location ◽  
Ecological Network ◽  
Saprophytic Fungi ◽  
Important Species ◽  
Symbiotic Fungi ◽  
Qinghai Tibet Plateau

The biodiversity of fungi, which are extremely important in maintaining the ecosystem balance in alpine lakeside wetlands, has not been fully studied. In this study, we investigated the fungal communities of three lakeside wetlands from different altitudes in the Qinghai–Tibet Plateau and its edge. The results showed that the fungi of the alpine lakeside wetland had higher species diversity. Functional annotation of fungi by FUNGild software showed that saprophytic fungi were the most abundant type in all three wetlands. Further analysis of the microbial phylogenetic molecular ecological network (pMEN) showed that saprophytic fungi are important species in the three wetland fungal networks, while symbiotic fungi and pathotrophic fungi have different roles in the fungal networks in different wetlands. Community diversity was high in all three lakeside wetlands, but there were significant differences in the composition, function and network structure of the fungal communities. Contemporary environmental conditions (soil properties) and historical contingencies (geographic sampling location) jointly determine fungi community diversity in this study. These results expand our knowledge of fungal biodiversity in the alpine lakeside wetlands.

Effects of exclosure duration on the community structure and species diversity of an alpine meadow in the Qinghai-Tibet Plateau

2016 ◽  
Vol 36 (16) ◽  
Author(s):  
刘晓琴 LIU Xiaoqin ◽  
张翔 ZHANG Xiang ◽  
张立锋 ZHANG Lifeng ◽  
李英年 LI Yingnian ◽  
赵亮 ZHAO Liang ◽  
...  
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Alpine Meadow ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

scholarly journals Responses of Alpine Grassland Plant Functional Groups To Environmental Changes In The Altunshan At North Qinghai-Tibet Plateau

2021 ◽  
Author(s):  
Ailin Zhang ◽  
Shixin Wu ◽  
Fanjiang Zeng ◽  
Yong Jiang ◽  
Ruzhen Wang ◽  
...  
Keyword(s):  
Functional Groups ◽  
Environmental Changes ◽  
Community Diversity ◽  
Alpine Grassland ◽  
Plant Functional Groups ◽  
Tibet Plateau ◽  
Individual Plant ◽  
Hydrothermal Conditions ◽  
Positive Correlation ◽  
Qinghai Tibet Plateau

Abstract Purpose: In grassland ecosystems, plant functional group (PFG) is an important bridge connecting individual plant to community system. Grassland ecosystem is the main ecosystem type on the Qinghai-Tibet Plateau, so the change of community structure of grassland vegetation.Methods: The Altun Mountains in the northern part of the Qinghai-Tibet Plateau were used as the study area to investigate the PFGs of a high-altitude (> 3700m) grassland in desert areas and their response to temperature and moisture.Results: The main functional groups were forbs and grasses, and the importance values (IV) accounted for more than 50%. Plant species diversity of the community was influenced by the functional groups of legumes IV, and the increase of legumes would promote the increase of plant community diversity. The C, N, P of plant communities were mainly influenced by forbs and grasses, and the relationship between forbs and C, N, P was opposite to that of grasses. There was a positive correlation between forbs and soil TP; a negative correlation between grasses and soil TP; a positive correlation between legumes with soil SOC and TN; and a positive correlation between sedge and soil SOC. However, under the influence of different hydrothermal conditions, forbs and grasses as dominant functional groups had stronger correlation with community and soil nutrients. Conclusions: This indicated that the PFGs with the largest proportion in the community had the greatest influence on the community. This provides a basis for the study of alpine grassland community development and ecosystem function under alpine grassland.

scholarly journals Fungi-Bacteria Associations in Wilt Diseased Rhizosphere and Endosphere by Interdomain Ecological Network Analysis

2021 ◽  
Vol 12 ◽  
Author(s):  
Lin Tan ◽  
Wei-ai Zeng ◽  
Yansong Xiao ◽  
Pengfei Li ◽  
Songsong Gu ◽  
...  
Keyword(s):  
Bacterial Wilt ◽  
Bacterial Species ◽  
Fungal Species ◽  
Wilt Disease ◽  
Community Diversity ◽  
Fungal Communities ◽  
Ecological Network ◽  
Ecological Network Analysis ◽  
Pathogen Invasion ◽  
Diversity Structure

In the plant rhizosphere and endosphere, some fungal and bacterial species regularly co-exist, however, our knowledge about their co-existence patterns is quite limited, especially during invasion by bacterial wilt pathogens. In this study, the fungal communities from soil to endophytic compartments were surveyed during an outbreak of tobacco wilt disease caused by Ralstonia solanacearum. It was found that the stem endophytic fungal community was significantly altered by pathogen invasion in terms of community diversity, structure, and composition. The associations among fungal species in the rhizosphere and endosphere infected by R. solanacearum showed more complex network structures than those of healthy plants. By integrating the bacterial dataset, associations between fungi and bacteria were inferred by Inter-Domain Ecological Network (IDEN) approach. It also revealed that infected samples, including both the rhizosphere and endosphere, had more complex interdomain networks than the corresponding healthy samples. Additionally, the bacterial wilt pathogenic Ralstonia members were identified as the keystone genus within the IDENs of both root and stem endophytic compartments. Ralstonia members was negatively correlated with the fungal genera Phoma, Gibberella, and Alternaria in infected roots, as well as Phoma, Gibberella, and Diaporthe in infected stems. This suggested that those endophytic fungi may play an important role in resisting the invasion of R. solanacearum.

Seed-resident microbiomes of leguminous and gramineous grasses are related to host stress tolerance

2019 ◽  
Author(s):  
Ya Dai ◽  
Xin-Yu Li ◽  
Yan Wang ◽  
Cai-Xia Li ◽  
Yuan He ◽  
...  
Keyword(s):  
Medicago Sativa ◽  
Microbial Communities ◽  
High Throughput Sequencing ◽  
Pathogenic Fungi ◽  
Fungal Communities ◽  
High Abundance ◽  
Tibet Plateau ◽  
Grass Species ◽  
Elymus Sibiricus ◽  
Qinghai Tibet Plateau

Abstract Background: The grasses in adverse environment such as Qinghai-Tibet Plateau are hypothesized to survive the harsh climate in part upon their seed-borne microorganisms, and yet the characteristics of the grass seed microbial communities remain undetermined. Here, we assessed the seed microbial communities of three native gramineous grass species (Avena sativa, Elymus sibiricus and Elymus dahuricus) and four candidate legumes (Vicia villosa, Trifolium repens, Trifolium pretense and Medicago sativa) on the Qinghai-Tibet Plateau by high-throughput sequencing. Results: A total of 1,013 bacterial operational taxonomic units (OTUs) and 922 fungal OTUs were observed. The OTUs that shared in all the samples were in high abundance but with different relative abundances. The majority of bacterial sequences were assigned to Proteobacteria (54~90%) and Firmicutes (5~41%), and the fungal communities were mainly composed of Ascomycota (23~96%) and Basidiomycota (2~11%). The fungal communities were more affected by host genetic distance than bacteria. The three gramineous grasses were speculated to survive the adversity partly due to their high abundance of beneficial bacteria like Pantoea or Bacillus, and non-pathogenic fungi like Candida or unclassified Helotiaceae. Also enriched with these potential beneficial taxa, the four leguminous grasses may be competent to adapt the Qinghai-Tibet Plateau stress. Furthermore, the higher tolerance grasses (Elymus sibiricus and Elymus dahuricus) possessed a greater number of growth-promoting and tolerance bacterial and non-pathogenic fungi. Conversely, the less tolerance grass Medicago sativa contained lower levels of such microorganisms, and showed higher abundance of pathogenic taxa. Furthermore, the isolated Bacillus subtilis or Pantoea agglomerans could more probably promote seeding growth of hosts with lower abundance of them, while inhibit if the endo-abundance of was high. Conclusions: Seed-resident microbiome structure of the four cold-tolerance legumes and three Qinghai-Tibet Plateau gramineae is host dependent and related to stress resistance. It also has a strong influence on the response of seedlings to biological seed treatments. This study provides valuable data for studying plant resilience, identifying more biocontrol strains, maximizing microbial functions in ‘smart farming’ practices.

scholarly journals Soil degradation influences soil bacterial and fungal community diversity in overgrazed alpine meadows of the Qinghai-Tibet Plateau

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lin Dong ◽  
Jingjing Li ◽  
Juan Sun ◽  
Chao Yang
Keyword(s):  
Fungal Diversity ◽  
Soil Degradation ◽  
Belowground Biomass ◽  
Control Site ◽  
Plant Litter ◽  
Community Diversity ◽  
Tibet Plateau ◽  
Alpine Meadows ◽  
Soil Bacterial ◽  
Qinghai Tibet Plateau

AbstractOver half of the alpine meadows in the Qinghai-Tibet Plateau (QTP) are degraded due to human activities. Soil degradation from overgrazing is the most direct cause of grassland degradation. It is thus important to synthesize the effects of multiple soil degradation indicators on the belowground biomass of plants and soil microorganisms in the degraded QTP. We studied the diversities and structures of soil bacterial and fungal communities using soil bacterial 16S rRNA and the fungal ITS gene under four degradation gradients, D1: lightly degraded, D2: moderately degraded, D3: highly degraded, and a non-degraded control site (CK). The bacterial Shannon diversity in D3 was significantly lower than that in D1 (p < 0.001), and the bacterial richness index in D3 was significantly lower than that in D1 (p < 0.001). There was no difference in soil fungal diversity among the different degradation levels; however, soil fungal richness decreased significantly from CK to D3. The phyla Actinobacteria, Acidobacteria and the genus Mortierella were differed significantly under the four degradation gradients. Plant litter mass and root C/N ratio were important factors associated with bacterial and fungal diversity and richness. These results indicated that alpine meadow degradation can lead to variations in both microbial diversity and the potential functioning of micro-organisms in the QTP.

scholarly journals Preliminary study of plankton community diversity of the Gahai Salt Lake in the Qaidam Basin of the Qinghai Tibet Plateau

2002 ◽  
Vol 10 (1) ◽  
pp. 38-43
Author(s):  
CAO Hong ◽  
XU Mu-Qi ◽  
JIA Qin-Xian ◽  
GAO Yu-Rong ◽  
CHEN Sheng-Gui ◽  
...  
Keyword(s):  
Salt Lake ◽  
Qaidam Basin ◽  
Plankton Community ◽  
Community Diversity ◽  
Tibet Plateau ◽  
Preliminary Study ◽  
Qinghai Tibet Plateau
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