African Journal of Soil Science

ISSN 2375-088X

African Journal of Soil Science ISSN 2375-088X Vol. 12 (3), pp. 001-016, March, 2025. Available online at www.internationalscholarsjournals.org © International Scholars Journals

Full Length Research Paper

Bacterial Community Dynamics in Amazonian Dark Earth and Surrounding Soils

Amanda Barbosa Lima1*, Fabiana de Souza Cannavan1, Mariana Gomes Germano1,4, Francisco Dini-Andreote2, Alessandra Monteiro de Paula3, Julio Cezar Franchini4, Wenceslau Geraldes Teixeira5 and Siu Mui Tsai1

1Laboratory of Cell and Molecular Biology, Centro de Energia Nuclear na Agricultura - CENA, University of Sao Paulo,
Piracicaba, Brazil.
2Department of Microbial Ecology, University of Groningen, The Netherlands.
3Department of Agronomy, Universidade Federal do Paraná, Palotina, Brazil.
4Brazilian Agricultural Research Corporation - EMBRAPA Soybean, Londrina, Brazil.
5Brazilian Agricultural Research Corporation - EMBRAPA Soils, Rio de Janeiro, Brazil.

Received 27 October, 2024; Accepted 10 January, 2025

Abstract

Amazonian Dark Earth (ADE) in the Brazilian Amazon is the main evidence left by pre-Columbian indigenous populations indicating that infertile soils can be transformed into highly fertile ground. Changes in vegetation cover and seasonality are likely to influence microbial communities; however, little is known about these effects on ADE. Therefore, this study compared the effects of two land use systems in ADE and adjacent soil (ADJ) during the rainy and dry seasons using biochemical and molecular tools. Bacterial community function was determined by community level physiological profile (CLPP), bacterial community structure by terminal restriction length polymorphism (T-RFLP), and bacterial community composition by pyrosequencing of the V4 16S rRNA gene region. Our results show that the community structure is highly affected by vegetation, in both, ADE and ADJ soils. Regarding community function, Average Well Color Development (from Biolog substrates) were higher in ADE than ADJ during the rainy season and kept the same pattern of substrate utilization during the dry season and finally, community composition showed to be influenced even at the level of family, mostly by soil type rather than vegetation. Collectively, our study provides insights into processes affecting the bacterial community assemblages in both, ADE and adjacent soils.

Key words: Amazonian soils, vegetation type, seasonality, soil bacteria.

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Amanda Barbosa Lima on Google Scholar Amanda Barbosa Lima on Pubmed Fabiana de Souza Cannavan on Google Scholar Fabiana de Souza Cannavan on Pubmed Mariana Gomes Germano on Google Scholar Mariana Gomes Germano on Pubmed Francisco Dini-Andreote on Google Scholar Francisco Dini-Andreote on Pubmed Alessandra Monteiro de Paula on Google Scholar Alessandra Monteiro de Paula on Pubmed Julio Cezar Franchini on Google Scholar Julio Cezar Franchini on Pubmed Wenceslau Geraldes Teixeira on Google Scholar Wenceslau Geraldes Teixeira on Pubmed Siu Mui Tsai on Google Scholar Siu Mui Tsai on Pubmed