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Silva, Danilo F. ; Rodrigues, Jorge L. Mazza ; Erikson, Christian ; Silva, Antonio M. M. ; Huang, Laibin ; Araujo, Victor L. V. P. ; Matteoli, Filipe P. ; Mendes, Lucas W. ; Araujo, Ademir S. F. ; Pereira, Arthur P. A. ; Melo, Vania M. M. ; Cardoso, Elke J. B. N.

• Tipo de documento: Artigo Científico
• Fonte: MICROBIOLOGICAL RESEARCH; v. 285, p. 12-pg., 2024-05-27.

Resumo

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 Irau & ccedil;uba, Ceara, utilized Internal Transcribed Spacer (ITS) gene sequencing via Illumina (R) platform. Our findings highlighted the significant roles of the AMF families Glomeraceae (similar to 71% of the total sequences) and Acaulosporaceae (similar to 14% of the total sequences) as potential key taxa in mitigating climate change within dryland areas. Moreover, we identified the orders Pleosporales (similar to 35% of the total sequences) and Capnodiales (similar to 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. (AU)

• Processo FAPESP: 22/07117-0 - Abundância de genes relacionados ao ciclo do fósforo no solo em um gradiente de desertificação
• Beneficiário: Danilo Ferreira da Silva
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• Processo FAPESP: 21/14418-3 - Estrutura da comunidade de fungos em um gradiente de desertificação no bioma Caatinga
• Beneficiário: Danilo Ferreira da Silva
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 16/18944-3 - Mudanças climáticas e eficiência energética na agricultura: um enfoque em estresse hídrico, manejo orgânico e biologia do solo
• Beneficiário: Elke Jurandy Bran Nogueira Cardoso
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático