Fujian Key Laboratory On Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou, 350108, China.
Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China.
Microb Ecol. 2023 Aug;86(2):1120-1131. doi: 10.1007/s00248-022-02144-z. Epub 2022 Nov 14.
Fungal communities are essential to the maintenance of soil multifunctionality. Plant invasion represents a growing challenge for the conservation of soil biodiversity across the globe, but the impact of non-native species invasion on fungal diversity, community structure, and assembly processes remains largely unknown. Here, we examined the diversity, community composition, functional guilds, and assembly process of fungi at three soil depths underneath a native species, three non-native species, and a bare tidal flat from a coastal wetland. Plant species was more important than soil depth in regulating the diversity, community structure, and functional groups of fungi. Non-native species, especially Spartina alterniflora, increased fungal diversity, altered fungal community structure, and increased the relative abundance of saprotrophic and pathogenic fungi in coastal wetland soils. Stochastic processes played a predominant role in driving fungal community assembly, explaining more than 70% of the relative contributions. However, compared to a native species, non-native species, especially S. alterniflora, reduced the relative influence of stochastic processes in fungal community assembly. Collectively, our results provide novel evidence that non-native species can increase fungal diversity, the relative abundance of saprotrophic and pathogenic fungi, and deterministic processes in the assembly of fungi in coastal wetlands, which can expand our knowledge of the dynamics of fungal communities in subtropical coastal wetlands.
真菌群落对于维持土壤多功能性至关重要。植物入侵是全球范围内土壤生物多样性保护面临的日益严峻的挑战，但外来物种入侵对真菌多样性、群落结构和组装过程的影响在很大程度上仍然未知。在这里，我们研究了一个沿海湿地中，原生种、三种外来种和裸露潮滩下三个土壤深度处真菌的多样性、群落组成、功能类群和组装过程。植物种类比土壤深度更能调节真菌的多样性、群落结构和功能群。外来种，特别是互花米草，增加了沿海湿地土壤中的真菌多样性，改变了真菌群落结构，并增加了腐生和病原真菌的相对丰度。随机过程在驱动真菌群落组装中起主导作用，解释了超过 70%的相对贡献。然而，与原生种相比，外来种，特别是互花米草，减少了随机过程在真菌群落组装中的相对影响。总的来说，我们的结果提供了新的证据，表明外来种可以增加真菌多样性、腐生和病原真菌的相对丰度以及真菌在沿海湿地中的组装过程中的确定性过程，这可以扩展我们对亚热带沿海湿地真菌群落动态的认识。
