Comparison of cyanobacterial communities in temperate deserts: A cue for artificial inoculation of biological soil crusts

Wang, Jin; Zhang, Peng; Bao, Jing-Ting; Zhao, Jiecai; Song, Guang; Yang, Hongqiang; Huang, Lei; He, Mingzhu; Li, Xinrong

doi:10.1016/j.scitotenv.2020.140970

Cited by 35 publications

(17 citation statements)

References 60 publications

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“…For the Eukaryota and cyanobacteria-specific dataset, we observed a similar richness between biocrusts and adjacent sand. An average of 100 cyanobacterial OTUs per site was revealed in biocrusts using cyanobacteria-specific primers, which is in the range reported for other biocrust studies worldwide using the same primers set (Williams et al, 2016 ; Muñoz-Martín et al, 2018 ; Roncero-Ramos et al, 2020 ; Wang et al, 2020 ; Pushkareva et al, 2021b ). Cyanobacteria surrounded by an extracellular matrix, which supports desiccation tolerance, are commonly observed as dominant species in biocrusts from arid and semi-arid regions on organic-poor soils (Büdel et al, 2016 ).…”

Section: Discussionsupporting

confidence: 66%

Microbial Communities in Biocrusts Are Recruited From the Neighboring Sand at Coastal Dunes Along the Baltic Sea

et al. 2022

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Biological soil crusts occur worldwide as pioneer communities stabilizing the soil surface. In coastal primary sand dunes, vascular plants cannot sustain due to scarce nutrients and the low-water-holding capacity of the sand sediment. Thus, besides planted dune grass, biocrusts are the only vegetation there. Although biocrusts can reach high coverage rates in coastal sand dunes, studies about their biodiversity are rare. Here, we present a comprehensive overview of the biodiversity of microorganisms in such biocrusts and the neighboring sand from sampling sites along the Baltic Sea coast. The biodiversity of Bacteria, Cyanobacteria, Fungi, and other microbial Eukaryota were assessed using high-throughput sequencing (HTS) with a mixture of universal and group-specific primers. The results showed that the biocrusts recruit their microorganisms mainly from the neighboring sand rather than supporting a universal biocrust microbiome. Although in biocrusts the taxa richness was lower than in sand, five times more co-occurrences were identified using network analysis. This study showed that by comparing neighboring bare surface substrates with biocrusts holds the potential to better understand biocrust development. In addition, the target sequencing approach helps outline potential biotic interactions between different microorganisms groups and identify key players during biocrust development.

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Section: Discussionsupporting

confidence: 66%

Microbial Communities in Biocrusts Are Recruited From the Neighboring Sand at Coastal Dunes Along the Baltic Sea

et al. 2022

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“…At the genus level, the relative abundance of Microcoleus in the undisturbed biocrusts (U) was as high as 24.7%, much higher than other genera, whereas it was lower than 1% in the disturbed biocrusts (DH), and its dominance was replaced by Thermoanaerobacterium . Microcoleus was the general dominant genus of photosynthetic autotrophs in early biocrusts globally ( Garcia-Pichel and Wojciechowski, 2009 ), playing an essential role in organic carbon input and biocrust formation in global drylands ( Wang et al, 2020 ). After physical disturbance, it was completely replaced by Thermoanaerobacterium , which was sporulated in biomes in low-nutrient environments, such as dry soil or tailings ( Maier et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Physical Disturbance Reduces Cyanobacterial Relative Abundance and Substrate Metabolism Potential of Biological Soil Crusts on a Gold Mine Tailing of Central China

et al. 2022

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As the critical ecological engineers, biological soil crusts (biocrusts) are considered to play essential roles in improving substrate conditions during ecological rehabilitation processes. Physical disturbance, however, often leads to the degradation of biocrusts, and it remains unclear how the physical disturbance affects biocrust microorganisms and their related metabolism. In this study, the photosynthetic biomass (indicated by chlorophyll a), nutrients, enzyme activities, and bacterial communities of biocrusts were investigated in a gold mine tailing of Central China to evaluate the impact of physical disturbance on biocrusts during the rehabilitation process of gold mine tailings. The results show that physical disturbance significantly reduced the photosynthetic biomass, nutrient contents (organic carbon, ammonium nitrogen, nitrate nitrogen, and total phosphorus), and enzyme activities (β-glucosidase, sucrase, nitrogenase, neutral phosphatase, and urease) of biocrusts in the mine tailings. Furthermore, 16S rDNA sequencing showed that physical disturbance strongly changed the composition, structure, and interactions of the bacterial community, leading to a shift from a cyanobacteria dominated community to a heterotrophic bacteria (proteobacteria, actinobacteria, and acidobacteria) dominated community and a more complex bacterial network (higher complexity, nodes, and edges). Altogether, our results show that the biocrusts dominated by cyanobacteria could also develop in the tailings of humid region, and the dominants (e.g., Microcoleus) were the same as those from dryland biocrusts; nevertheless, physical disturbance significantly reduced cyanobacterial relative abundance in biocrusts. Based on our findings, we propose the future work on cyanobacterial inoculation (e.g., Microcoleus), which is expected to promote substrate metabolism and accumulation, ultimately accelerating the development of biocrusts and the subsequent ecological restoration of tailings.

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“…Cyanobacteria could have a favorable application due to extracellular polysaccharide and morphological characteristics (Munoz-Rojas et al, 2018). However, the spatial differences of soil cyanobacteria were determined by biotic and abiotic factors, complex environmental factors affect microbial community structure (Wang et al, 2020), such as soil properties, artificial plantations, and soil microbes and precipitation, etc. .…”

Section: Discussionmentioning

confidence: 99%

Variations of Soil Cyanobacteria Communities Accompanied by Different Habitat Types in Abandoned Ion-Absorbed Rare Earth Tailings

Liu

Zhang

Feng

et al. 2022

J. Environ. Sci. Eng. Technol.

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Soil fertility declined, companied with the poor capacity of water holding, after rare earth mining for a long time, mine tailings remediation produced in conventional rare earth elements REEs exploitation are currently urgent issues. Cyanobacteria are prokaryotic oxygenic phototrophs, played a vital role in the biogeochemical cycling of carbon (C) and nitrogen (N), reducing soil loss, are the pioneer organisms of biological soil crusts BSCs. However, studies on cyanobacteria inoculation in abandoned ionic rare earth mines were still insufficient. The abundance and composition of microorganisms in the topsoil of abandoned ionic rare earth mines were analyzed using high-throughput sequencing of the 16S rRNA V4 gene in this study. Fifteen samples were selected in and around rare earth mine tailings based on five different habitat types to assess the difference of main bacteria component and the dominant cyanobacteria caused by environmental factors. A total of 713,057 effective 16S rRNA genes were classified into 30 bacteria phyla, and 7 cyanobacterial genera were determined in phyla of Cyanobacteria. Proteobacteria, Chloroflexi, Acidobacteria, Actinobacteria, Planctomycetes, and Cyanobacteria were dominant groups in all samples (>5% of total effective sequences). Only Microcoleus, Leptolyngbya, Microcystis, Stigonema, Chroococcidiopsis, Phormidium, and Lyngbya were determined in rare earth mine tailings. Leptolyngbya was wildly distributed in rare earth tailings except for natural woodland, while Microcoleus was found in all of the studying areas in this study. Mining activities could cause the amount of unknown cyanobacteria specie pnr_Chloroplast abnormal. Additionally, results showed that cyanobacteria community composition was not correlated with soil organic matter SOM, but cyanobacteria richness and diversity were limited by the high content of ammonia nitrogen, and Leptolyngbya and Microcoleus could apply to abandoned ion-absorbed rare earth mining tailings repairment.

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Comparison of cyanobacterial communities in temperate deserts: A cue for artificial inoculation of biological soil crusts

Cited by 35 publications

References 60 publications

Microbial Communities in Biocrusts Are Recruited From the Neighboring Sand at Coastal Dunes Along the Baltic Sea

Microbial Communities in Biocrusts Are Recruited From the Neighboring Sand at Coastal Dunes Along the Baltic Sea

Physical Disturbance Reduces Cyanobacterial Relative Abundance and Substrate Metabolism Potential of Biological Soil Crusts on a Gold Mine Tailing of Central China

Variations of Soil Cyanobacteria Communities Accompanied by Different Habitat Types in Abandoned Ion-Absorbed Rare Earth Tailings

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