Grazing exclusion-induced changes in soil fungal communities in a highly desertified Brazilian dryland.

Autor: Silva DF; Laboratory of Soil Microbiology, Soil Science Department, 'Luiz de Queiroz' College of Agriculture, University of São Paulo, Piracicaba, São Paulo, Brazil; Soil EcoGenomics Laboratory, Department of Land, Air and Water Resources, University of California, Davis, CA, USA. Electronic address: danilo_ferreira@usp.br., Mazza Rodrigues JL; Soil EcoGenomics Laboratory, Department of Land, Air and Water Resources, University of California, Davis, CA, USA; Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA., Erikson C; Soil EcoGenomics Laboratory, Department of Land, Air and Water Resources, University of California, Davis, CA, USA., Silva AMM; Laboratory of Soil Microbiology, Soil Science Department, 'Luiz de Queiroz' College of Agriculture, University of São Paulo, Piracicaba, São Paulo, Brazil., Huang L; Department of Biology, Saint Louis University, St. Louis, MO, USA., Araujo VLVP; Laboratory of Soil Microbiology, Soil Science Department, 'Luiz de Queiroz' College of Agriculture, University of São Paulo, Piracicaba, São Paulo, Brazil., Matteoli FP; Laboratory of Microbial Bioinformatic, Faculty of Sciences, São Paulo State University (Unesp), Bauru, São Paulo, Brazil., Mendes LW; Center for Nuclear Energy in Agriculture, Piracicaba, São Paulo, Brazil., Araujo ASF; Federal University of Piauí, Teresina, Piauí, Brazil., Pereira APA; Federal University of Ceará, Fortaleza, Ceará, Brazil., Melo VMM; Federal University of Ceará, Fortaleza, Ceará, Brazil., Cardoso EJBN; Laboratory of Soil Microbiology, Soil Science Department, 'Luiz de Queiroz' College of Agriculture, University of São Paulo, Piracicaba, São Paulo, Brazil.
Jazyk: angličtina
Zdroj: Microbiological research [Microbiol Res] 2024 Aug; Vol. 285, pp. 127763. Date of Electronic Publication: 2024 May 15.
DOI: 10.1016/j.micres.2024.127763
Abstrakt: Soil desertification poses a critical ecological challenge in arid and semiarid climates worldwide, leading to decreased soil productivity due to the disruption of essential microbial community processes. Fungi, as one of the most important soil microbial communities, play a crucial role in enhancing nutrient and water uptake by plants through mycorrhizal associations. However, the impact of overgrazing-induced desertification on fungal community structure, particularly in the Caatinga biome of semiarid regions, remains unclear. In this study, we assessed the changes in both the total fungal community and the arbuscular mycorrhizal fungal community (AMF) across 1. Natural vegetation (native), 2. Grazing exclusion (20 years) (restored), and 3. affected by overgrazing-induced degradation (degraded) scenarios. Our assessment, conducted during both the dry and rainy seasons in Irauçuba, Ceará, utilized Internal Transcribed Spacer (ITS) gene sequencing via Illumina® platform. Our findings highlighted the significant roles of the AMF families Glomeraceae (∼71% of the total sequences) and Acaulosporaceae (∼14% of the total sequences) as potential key taxa in mitigating climate change within dryland areas. Moreover, we identified the orders Pleosporales (∼35% of the total sequences) and Capnodiales (∼21% of the total sequences) as the most abundant soil fungal communities in the Caatinga biome. The structure of the total fungal community differed when comparing native and restored areas to degraded areas. Total fungal communities from native and restored areas clustered together, suggesting that grazing exclusion has the potential to improve soil properties and recover fungal community structure amid global climate change challenges.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper
(Copyright © 2024 Elsevier GmbH. All rights reserved.)
Databáze: MEDLINE
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