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- W4317436739 abstract "Abstract Aims Soil phosphorus (P) cycling in karst regions is mainly regulated by microbial activities. Natural restoration has been widely adopted in the degraded karst regions of southwestern China. However, the responses of functional genes and microbial communities involved in soil P cycling to revegetation have not been well characterized. Methods We used metagenomic sequencing to investigate the genes and microorganisms related to soil P cycling derived from natural restoration stages (shrubbery, TG; secondary forest, SG; old-growth forest, OG) in the southeast of Guizhou Province, China. Results Natural restoration affected the composition of soil P cycling genes. When TG returned to OG, the relative abundance of organic P (OP) mineralization genes increased from 45.78% to 48.38%, while the genes related to inorganic P (IP) solubilization decreased from 27.19% to 25.03%. Compared to aboveground plant diversity, soil nutrients more affected the relative abundances of OP and IP genes. Structural equation model (SEM) further indicated that soil nutrients directly drove the increase in the relative abundance of OP genes and indirectly impacted the relative abundance of IP genes. We also found that Proteobacteria (38.97%–52.72%) and Actinobacteria (13.44%–29.34%) were the main contributors to soil OP and IP cycling genes but their contributions varied among the restoration stages. Conclusions Natural restoration of the degraded karst vegetation shifted the acquisition strategy of soil microbial P by enhancing OP but decreasing IP cycling potentials. This study provides a novel insight into the regulation of P cycling in the ecological restoration of degraded karst regions from microbial perspective." @default.
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- W4317436739 date "2023-01-19" @default.
- W4317436739 modified "2023-10-18" @default.
- W4317436739 title "Natural restoration of degraded karst vegetation shifts the acquisition strategy of soil microbial phosphorus by enhancing organic phosphorus and decreasing inorganic phosphorus cycling potentials" @default.
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- W4317436739 doi "https://doi.org/10.21203/rs.3.rs-2465720/v1" @default.
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