Biogeographic responses and niche occupancy of microbial communities following long-term land-use change

Autor(es)

Goss-Souza, Dennis ; Tsai, Siu Mui ; Rodrigues, Jorge Luiz Mazza ; Klauberg-Filho, Osmar ; Sousa, Jose Paulo ; Baretta, Dilmar ; Mendes, Lucas William

• Tipo de documento: Artigo Científico
• Fonte: ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY; v. 115, n. 9, p. 22-pg., 2022-07-19.

Resumo

Understanding the effects of forest-to-agriculture conversion on microbial diversity has been a major goal in soil ecological studies. However, linking community assembly to the ruling ecological processes at local and regional scales remains challenging. Here, we evaluated bacterial community assembly patterns and the ecological processes governing niche specialization in a gradient of geography, seasonality, and land-use change, totaling 324 soil samples, 43 habitat characteristics (abiotic factors), and 16 metabolic and co-occurrence patterns (biotic factors), in the Brazilian Atlantic Rainforest, a subtropical biome recognized as one the world's largest and most threatened hotspots of biodiversity. Pairwise beta diversities were lower in pastures than in forest and no-till soils. Pasture communities showed a predominantly neutral model, regarding stochastic processes, with moderate dispersion, leading to biotic homogenization. Most no-till and forest microbial communities followed a niche-based model, with low rates of dispersal and weak homogenizing selection, indicating niche specialization or variable selection. Historical and evolutionary contingencies, as represented by soil type, season, and dispersal limitation were the main drivers of microbial assembly and processes at the local scale, markedly correlated with the occurrence of endemic microbes. Our results indicate that the patterns of assembly and their governing processes are dependent on the niche occupancy of the taxa evaluated (generalists or specialists). They are also more correlated with historical and evolutionary contingencies and the interactions among taxa (i.e., co-occurrence patterns) than the land-use change itself. (AU)

• Processo FAPESP: 20/12890-4 - Microbiana da rizosfera de feijão tolerante à seca
• Beneficiário: Lucas William Mendes
• Modalidade de apoio: Bolsas no Brasil - Programa de Pesquisa sobre Mudanças Climáticas Globais - Jovens Pesquisadores
• Processo FAPESP: 14/50320-4 - Dimensões US-BIOTA - São Paulo: pesquisa colaborativa: integrando as dimensões da biodiversidade microbiana ao longo de áreas de alteração do uso da terra em florestas tropicais
• Beneficiário: Tsai Siu Mui
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 08/58114-3 - Monitoring the microbial diversity and functional activities in response to land-use changes and deforestation under soybean and sugarcane cultivations
• Beneficiário: Tsai Siu Mui
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 19/16043-7 - Microbioma da rizosfera de feijão tolerante à seca
• Beneficiário: Lucas William Mendes
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Jovens Pesquisadores