Abstract
Microbial population and activity can be influenced by changes in the physical and chemical conditions of the soil. The objective of this study was to compare fungal diversity under different agricultural management systems and associated differences in soil properties. This research was carried out in three areas, representing the Atlantic Forest, AFS and cassava (Manihot esculenta Crantz) monoculture system. Five composite samples were collected during the rainy and dry seasons from each area. Using the composite soil samples, fungal isolation was carried out using a serial dilution technique. Physical, chemical and DGGE analyses of the filamentous fungi community were performed. The fungal isolation data were used to calculate ecological indices of diversity, species richness, equitability, dominance, similarity and density. In general, Atlantic Forest soil presented the highest ecological indices followed by the AFS. The DGGE technique revealed that the structure of the soil mycobiota of the Atlantic Forest and AFS are more than 50% similar. The data indicate that the similarity of the structure and composition of soil mycobiota between AFS and Atlantic Forest is mainly due to the conservation of above-ground plant diversity, and the conservation of soil characteristics can be attributed to the absence of pesticides and fertilizers.
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Acknowledgments
This work was financially supported by Financiadora de Estudos e Projetos-FINEP and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-CAPES (via the Post-Graduation Programme on Fungal Biology, Universidade Federal de Pernambuco), and Conselho Nacional de Desenvolvimento Científico e Tecnológico-CNPq as a scholarship to the first author. The authors are also grateful to Mr. Jones S. Pereira, owner of the São João smallholding, Mrs Luciana, owner of the Dona Luciana smallholding, and the personnel of the Centro de Desenvolvimento Agroecológico Sabiá (NGO) for the agroforestry initiative in Pernambuco, Brazil.
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Costa, P.M.O., Souza-Motta, C.M. & Malosso, E. Diversity of filamentous fungi in different systems of land use. Agroforest Syst 85, 195–203 (2012). https://doi.org/10.1007/s10457-011-9446-8
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DOI: https://doi.org/10.1007/s10457-011-9446-8