Arbuscular mycorrhizal fungal diversity in soils underlying moss biocrusts in coal mining subsidence areas
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RESEARCH ARTICLE
Arbuscular mycorrhizal fungal diversity in soils underlying moss biocrusts in coal mining subsidence areas Yinli Bi 1,2
&
Yun Guo 1 & Huan Sun 1
Received: 27 May 2020 / Accepted: 2 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The potentially symbiotic mycorrhizal associations dominated by arbuscular mycorrhizal (AM) fungi have become a new topic in bioremediation research in response to global change. Biological soil crusts (biocrusts) play an important role in arid and semiarid ecosystems. However, AM fungal diversity in the soils underlying moss biocrusts in coal mining subsidence areas remains poorly understood. Here, samples of the soil underlying moss biocrusts in an area inoculated with an AM fungus (AM-BS) and an uninoculated area (CK-BS) plus soil samples from an uninoculated bare area (CK-NBS) were collected from the subsidence area of Shendong Daliuta mine at Yulin, northwest China. AM fungal community diversity indices were maximum in AM-BS, intermediate in CK-BS, and minimum in CK-NBS (P < 0.05). In addition, redundancy analysis (RDA) indicates that the importance of moss biocrust to soil properties followed the sequence: soil water content (SWC) > glomalin-related soil protein (TG) > available phosphorus (Olsen-P) > soil organic matter (SOM) > easily extractable glomalin-related soil protein (EEG) > pH > available nitrogen (alkali-N). SWC, alkali-N, Olsen-P, and SOM were significantly related to the abundance of Glomus and Claroideoglomus, and TG, EEG, and pH were positively related to Diversisipora. In summary, inoculation with the exotic AM fungus and moss biocrust cover created a eutrophic microhabitat for AM fungi in the soils underlying moss biocrusts in the coal mining subsidence area. Keywords AM fungal diversity . Biological soil crusts . Coal mining subsidence . Underlying soils
Introduction Coal remains an important energy source in China despite the need to move to renewable energy technology to mitigate climate change. However, coal mining activities inevitably initiate the formation of surface cracks and subsidence, change the water cycle path of a regional ecosystem (Ping et al. 2017), and lead to soil erosion, degradation of soil quality, and plant growth limitation (Ma et al. 2019; Kuter et al. 2014). Because of these destructive Responsible editor: Diane Purchase * Yinli Bi [email protected] 1
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing 100083, China
2
College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
ecological effects, the sustainable development and management of mining areas have become a major concern (Cejpek et al. 2013). Hence, the reclamation of mining subsidence land has become necessary. AM fungi are soil-borne fungi forming potentially symbiotic relationships with ˃ 80% of higher plants providing a direct link between the soil and plant roots (Smith and Read 2008). Previous studies demonstra
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