Wang Lin, Li Jie, Zhang Si
CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.
Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China.
Front Microbiol. 2022 Mar 17;13:831710. doi: 10.3389/fmicb.2022.831710. eCollection 2022.
Biological soil crusts (BSCs/biocrusts), which are distributed across various climatic zones and well-studied in terrestrial drylands, harbor polyextremotolerant microbial topsoil communities and provide ecological service for local and global ecosystem. Here, we evaluated BSCs in the tropical reef islands of the South China Sea. Specifically, we collected 41 BSCs, subsurface, and bare soil samples from the Xisha and Nansha Archipelagos. High-throughput amplicon sequencing was performed to analyze the bacterial, fungal, and archaeal compositions of these samples. Physicochemical measurement and enzyme activity assays were conducted to characterize the soil properties. Advanced computational analysis revealed 47 biocrust-specific microbes and 10 biocrust-specific soil properties, as well as their correlations in BSC microbial community. We highlighted the previously underestimated impact of manganese on fungal community regulation and BSC formation. We provide comprehensive insight into BSC formation networks on tropical reef islands and established a foundation for BSC-directed environmental restoration.
生物土壤结皮（BSCs/生物结皮）分布于各种气候带，在陆地干旱地区得到了充分研究，它含有多种极端耐受微生物的表土群落，为当地和全球生态系统提供生态服务。在此，我们评估了中国南海热带珊瑚礁岛屿上的生物土壤结皮。具体而言，我们从西沙群岛和南沙群岛采集了41份生物土壤结皮、地下土壤和裸土样本。通过高通量扩增子测序分析这些样本的细菌、真菌和古菌组成。进行了理化测量和酶活性测定以表征土壤性质。先进的计算分析揭示了47种生物结皮特异性微生物和10种生物结皮特异性土壤性质，以及它们在生物土壤结皮微生物群落中的相关性。我们强调了锰对真菌群落调控和生物土壤结皮形成的影响此前被低估。我们全面洞察了热带珊瑚礁岛屿上生物土壤结皮的形成网络，并为以生物土壤结皮为导向的环境恢复奠定了基础。
