title: Eukaryotic microbial communities in hypersaline soils and sediments from the alkaline hypersaline Huama Lake as revealed by 454 pyrosequencing.
abstract: In hypersaline ecosystems, microbial assemblages are structurally distinctive and play important roles in many microbiological and ecological processes. Here, eukaryotic microorganisms in hypersaline samples were investigated by 454 pyrosequencing of internal transcribed spacer (ITS) gene libraries. In total, 4,645, 1,677, and 5,912 reads were obtained from ITS libraries of waterlogged samples, salt crusts, and saline loess from the alkaline Huama Lake in Shaanxi, China. Analyses of pyrosequencing data revealed that the dominant genera were Dunaliella, Alternaria and Chlamydomonas, which dominated the microbial assemblages in the waterlogged sediments, the salt crusts and the saline loess from the lake banks, respectively. The various infrequent species were not commonly shared by the three types of samples, demonstrating that the eukaryotic microbial compositions of the different environments were distinct. However, the micro-eukaryotic assemblages associated with similar environmental conditions shared some components and were phylogenetically related. The eukaryotic microbial community composition was correlated with the pH value of the site (p = 0.001; r(2) = 0.99), but not with the concentration of total nitrogen or the inorganic ions investigated in this study. The results of this study demonstrated that the hypersaline ecosystems hosted surprisingly diverse eukaryotic microbial community.
authors.affiliation: Key Laboratory of Microbial Diversity in Southwest China, Ministry of Education, Laboratory for Conservation and Utilization of Bio-resources, Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, China.
authors.forename: Kaihui
authors.initials: K
authors.lastname: Liu
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Ding
authors.forename: Hong-Fei
authors.initials: HF
authors.lastname: Wang
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Zhang
authors.forename: Wael N
authors.initials: WN
authors.lastname: Hozzein
authors.forename: Mohammed A M
authors.initials: MA
authors.lastname: Wadaan
authors.forename: Afeng
authors.initials: A
authors.lastname: Lan
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Wenjun
authors.initials: W
authors.lastname: Li
mesh_terms: D058448:Biota; D002681:China; D016000:Cluster Analysis; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D056890:Eukaryota / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D019015:Geologic Sediments; D008969:Molecular Sequence Data; D010802:Phylogeny; D017422:Sequence Analysis, DNA; D012987:Soil
chemical_list: D021903:DNA, Ribosomal Spacer; D012987:Soil