Jia Rongliang, Gao Yanhong, Zhao Lina, Zhang Tao, Guo Hui, You Wanxue, Duan Yulong
Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China.
Microorganisms. 2022 Oct 11;10(10):2010. doi: 10.3390/microorganisms10102010.
Biological soil crusts (BSCs) are an integration of external photoautotrophs and internal heterotrophic communities. Sand burial is a ubiquitous disturbance that affects the biodiversity and ecological function of BSCs, but little is known about the influence of sand burial on microbial communities in arid sandy deserts. Here, based on a long-term field experiment and utilizing high-throughput sequencing, we assessed the influence of sand burial on bacterial and fungal communities inhabiting two typical successional stages of BSCs (cyanobacterial crusts for early successional stage and mixed crusts for late successional stage) at the three-sand buried depth (0, 0.5, and 10 mm) in the Tengger Desert, Northern China. We found that the diversity, abundance, and composition of the bacterial and fungal communities were all altered by the sand burial treatment. Different indicator taxa were identified in unburied and buried (shallow and deep) BSCs. Changes in soil properties caused by sand burial have been suggested as a possible cause of changes in the bacterial and fungal community composition in BSCs.
生物土壤结皮（BSCs）是外部光合自养生物和内部异养群落的综合体。沙埋是一种普遍存在的干扰因素，会影响生物土壤结皮的生物多样性和生态功能，但对于沙埋对干旱沙漠地区微生物群落的影响却知之甚少。在此，基于一项长期野外实验并利用高通量测序技术，我们评估了在中国北方腾格里沙漠中，沙埋对处于两个典型演替阶段（早期演替阶段的蓝藻结皮和晚期演替阶段的混合结皮）的生物土壤结皮中细菌和真菌群落的影响，沙埋深度设置为三个水平（0、0.5和10毫米）。我们发现，沙埋处理改变了细菌和真菌群落的多样性、丰度及组成。在未被掩埋和被掩埋（浅埋和深埋）的生物土壤结皮中鉴定出了不同的指示类群。有研究认为，沙埋引起的土壤性质变化可能是生物土壤结皮中细菌和真菌群落组成发生变化的一个原因。
