摘要: 鄯善库木塔格沙漠是一个与城市相连的沙漠，蕴含着丰富独特的微生物菌株资源。为了探究鄯善库木塔格沙漠的微生物群落结构以及其与环境因子之间的关系，采集了鄯善库木塔格沙漠北缘4个样点的表层（0~5 cm）和深层（45~50 cm）的沙土样本，并测定了其含水量（WC）、pH、总碳（TC）、总氮（TN）、总有机碳（TOC）和电导率（EC）；利用高通量测序技术，研究不同采样点、不同深度沙土样本的细菌群落结构；运用Spearman相关性分析环境因子和细菌群落结构之间的相关性，探讨影响细菌群落结构的主要因素。结果表明：鄯善库木塔格沙漠北缘沙土样本呈碱性；门水平上的优势菌是放线菌（Actinobacteria）、厚壁菌（Firmicutes）和变形菌（Proteobacteria），属水平上的优势菌是unclassified_f__Micrococcaceae、Bacillus、Sphingomonas、Escherichia-Shigella。PCoA分析表明，鄯善库木塔格沙漠北缘不同样点之间的细菌群落结构存在显著差异（P＜0.05）；表层和深层样本的物种多样性没有显著差异。RDA分析表明，WC、TC、TN和pH显著影响表层样本的细菌群落结构（P＜0.05），TOC含量显著影响深层样本的细菌群落结构（P＜0.05）。本研究为后期鄯善库木塔格沙漠及相似生境中微生物资源的发掘提供了理论依据。
Abstract: The Shanshan Kumtag Desert, which is connected to the city, contains rich and unique microbialresources. To explore the microbial community structure and its relationship with environmental factors in theShanshan Kumtag Desert, surface (0-5 cm) and deep (45-50 cm) layer sand samples were collected from fourpoints along the northern margin of the desert. Subsequently, the collected samples were analyzed to determinethe water content (WC), pH, total carbon (TC), total nitrogen (TN), total organic carbon (TOC), and electricalconductivity. High-throughput sequencing technology was used to analyze the bacterial community structure ofthe sand samples, and Spearman correlation was used to analyze the correlation between environmental factorsand the bacterial community structure. The results showed that the collected sand samples were alkaline, and thedominant bacterial phyla were Actinobacteria, Firmicutes, Proteobacteria, and Bacteroidetes. Among these, thedominant genera were unclassified_f__Micrococcaceae, Bacillus, Sphingomonas, Escherichia- Shigella, andMicrobacterium. Significant differences in the bacterial community structure were observed among the differentpoints along the northern margin of the Shanshan Kumtag Desert (P
| [V1] | 2023-08-26 13:26:45 | ChinaXiv:202308.00666V1 | 下载全文 |
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