[1]HE Gaohang,LI Tongtong,WANG Xiaolu,et al.Variations of Sediment Fungal Community Structure and Function Across a Catchment in Loess Plateau[J].Research of Soil and Water Conservation,2023,30(05):274-282.[doi:10.13869/j.cnki.rswc.2023.05.055.]
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Variations of Sediment Fungal Community Structure and Function Across a Catchment in Loess Plateau
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 05
Page number:
274-282
Column:
Public date:
2023-08-10
- Title:
- Variations of Sediment Fungal Community Structure and Function Across a Catchment in Loess Plateau
- CLC:
- X172
- DOI:
- 10.13869/j.cnki.rswc.2023.05.055.
- Abstract:
- [Objective] Exploring variations of fungal community structure and function during sediment transfer across a catchment is conducive to consummating the study of sediment erosion, and provides theoretical support for understanding the evolution process of the ecosystem in eroded region. [Methods] Suspended sediments were collected from different geospatial locations under the main valley bottom during flood season at a typical small watershed in Loess Plateau. Physicochemical properties of suspended sediments were measured and the characteristics of sediments fungal community were determined by the high-throughput sequencing of ITS. [Results] Shannon index and chao1 index of suspended sediments fungal community decreased by 23.2% and 33.2% from gully head to dam, which meant fungal community diversity and richness were decreased significantly along the direction of sediment transfer(p<0.05), and the spatial heterogeneity showed in fungal community structure. From gully head to dam, the relative abundance of Ascomycota and Basidiomycota decreased by 7.6% and 6.9%, and the relative abundance of Saprotroph decreased by 6.0%. The fungal co-occurrence networks became simpler from gully head to dam, which meant the stability and anti-interference ability of fungal community were weakened gradually. The fungal community diversity(Shannon)and richness(chao1)of suspended sediments were negatively correlated with OC, TN and Olsen-P(p<0.05), were positively correlated with the >63 μm content(p<0.05). [Conclusion] The diversity, richness, and stability of sediment fungal community changed during transport process across a catchment, particle composition and CNP contents appeared to be the crucial influence factors.
- References:
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Last Update:
2023-08-10