Fungal communities of lichen-dominated biological soil crusts: Diversity, relative microbial biomass, and their relationship to disturbance and crust cover

Bates, Scott T.; Nash, Thomas H.; Sweat, Ken G.; García-Pichel, Ferrán

doi:10.1016/j.jaridenv.2010.05.033

Cited by 85 publications

(59 citation statements)

References 51 publications

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“…Total bacterial and cyanobacterial 16S rRNA gene abundance in crusts ranged from 1 9 10 11 to 3 9 10 11 copies g -1 soil (Fig. 6), which is congruent with a previous study conducted in Colorado (Bates et al 2010). The ratio of cyanobacteria to bacteria was above 60 % and was highest in the Swale 1 sample (97.6 %).…”

Section: Microbial Abundancesupporting

confidence: 89%

Community succession of bacteria and eukaryotes in dune ecosystems of Gurbantünggüt Desert, Northwest China

Zhang

2014

Extremophiles

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Pyrosequencing and quantitative polymerase chain reaction of small subunit rRNA genes were used to provide a comprehensive examination of bacterial, cyanobacterial, and eukaryotic communities in the biological soil crusts (BSCs) of Gurbantünggüt Desert sand dunes (China). Three succession stages were recognized based on the analyses of eukaryotic communities: a late succession stage of BSCs in a swale with eukaryotes mainly related to the Bryophyta clade, an initial succession stage in a slope with barely any eukaryotic phototrophic microorganisms detected, and an intermediate succession type detected from both the swale and slope BSCs dominated by the phylum Chlorophyta. Moreover, the cyanobacterial community dominated all of the BSCs (48.2-69.5 % of the total bacteria) and differed among the three succession stages: sequences related to Microcoleus steenstrupii and the genus Scytonema were abundant in the later succession stage, whereas both the initial and intermediate stages were dominated by Microcoleus vaginatus. Compared with swales, BSCs from slopes are exposed to a harsher environment, e.g., higher irradiance and lower water availability, and thus may be restricted from developing to a higher succession stage. Other disturbances such as wind and grazing may explain the different succession stages observed in swales or slopes. However, no clear differences were detected from non-phototrophic bacterial communities of the three succession stages, and sequences related to Alphaproteobacteria and Actinobacteria were most abundant in all the BSCs. The closest matches for the most frequent non-phototrophic bacterial genera were mainly derived from harsh environments, indicating the robustness of these genera.

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Section: Microbial Abundancesupporting

confidence: 89%

Community succession of bacteria and eukaryotes in dune ecosystems of Gurbantünggüt Desert, Northwest China

Zhang

2014

Extremophiles

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“…Bacteria present the highest proportion of the microbial biomass in BSCs (Bates et al, 2010;Green et al, 2008;Gundlapally and Garcia-Pichel, 2006;Maier et al, 2014;Wang et al, 2015) and thus have important roles in the BSC successional process. They can decompose organic material and release nutrients, mediating geochemical processes necessary for ecosystem functioning in the persistence of BSCs (Balser and Firestone, 2005).…”

Section: Introductionmentioning

confidence: 99%

Development of bacterial communities in biological soil crusts along a revegetation chronosequence in the Tengger Desert, northwest China

Liu

Zhang

et al. 2017

Biogeosciences

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Abstract. Knowledge of structure and function of microbial communities in different successional stages of biological soil crusts (BSCs) is still scarce for desert areas. In this study, Illumina MiSeq sequencing was used to assess the compositional changes of bacterial communities in different ages of BSCs in the revegetation of Shapotou in the Tengger Desert. The most dominant phyla of bacterial communities shifted with the changed types of BSCs in the successional stages, from Firmicutes in mobile sand and physical crusts to Actinobacteria and Proteobacteria in BSCs, and the most dominant genera shifted from Bacillus, Enterococcus and Lactococcus to RB41_norank and JG34-KF-361_norank. Alpha diversity and quantitative real-time polymerase chain reaction (PCR) analysis indicated that bacterial richness and abundance reached their highest levels after 15 years of BSC development. Redundancy analysis showed that silt + clay content and total K were the prime determinants of the bacterial communities of BSCs. The results suggested that bacterial communities of BSCs recovered quickly with the improved soil physicochemical properties in the early stages of BSC succession. Changes in the bacterial community structure may be an important indicator in the biogeochemical cycling and nutrient storage in early successional stages of BSCs in desert ecosystems.

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“…In recent years, quantitative PCR (qPCR) has emerged as a promising tool for quantifying microbial communities [14]. qPCR approach has been shown to be highly useful in assessing the abundance of specific phylogenetic groups of microorganisms in soils [22,24,44], which is also applied to fungal abundance in some environment samples [3,14,26].…”

Section: Introductionmentioning

confidence: 99%

High Fungal Diversity and Abundance Recovered in the Deep-Sea Sediments of the Pacific Ocean

2014

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Knowledge about the presence and ecological significance of bacteria and archaea in the deep-sea environments has been well recognized, but the eukaryotic microorganisms, such as fungi, have rarely been reported. The present study investigated the composition and abundance of fungal community in the deep-sea sediments of the Pacific Ocean. In this study, a total of 1,947 internal transcribed spacer (ITS) regions of fungal rRNA gene clones were recovered from five sediment samples at the Pacific Ocean (water depths ranging from 5,017 to 6,986 m) using three different PCR primer sets. There were 16, 17, and 15 different operational taxonomic units (OTUs) identified from fungal-universal, Ascomycota-, and Basidiomycota-specific clone libraries, respectively. Majority of the recovered sequences belonged to diverse phylotypes of Ascomycota (25 phylotypes) and Basidiomycota (18 phylotypes). The multiple primer approach totally recovered 27 phylotypes which showed low similarities (≤97 %) with available fungal sequences in the GenBank, suggesting possible new fungal taxa occurring in the deep-sea environments or belonging to taxa not represented in the GenBank. Our results also recovered high fungal LSU rRNA gene copy numbers (3.52 × 10(6) to 5.23 × 10(7)copies/g wet sediment) from the Pacific Ocean sediment samples, suggesting that the fungi might be involved in important ecological functions in the deep-sea environments.

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Fungal communities of lichen-dominated biological soil crusts: Diversity, relative microbial biomass, and their relationship to disturbance and crust cover

Cited by 85 publications

References 51 publications

Community succession of bacteria and eukaryotes in dune ecosystems of Gurbantünggüt Desert, Northwest China

Community succession of bacteria and eukaryotes in dune ecosystems of Gurbantünggüt Desert, Northwest China

Development of bacterial communities in biological soil crusts along a revegetation chronosequence in the Tengger Desert, northwest China

High Fungal Diversity and Abundance Recovered in the Deep-Sea Sediments of the Pacific Ocean

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