Soil microbial community dynamics and assembly under long-term land use change

Author(s)

Goss-Souza, Dennis ^{[1, 2, 3]} ; Mendes, Lucas William ^[2] ; Borges, Clovis Daniel ^{[2, 3]} ; Baretta, Dilmar ^[4] ; Tsai, Siu Mui ^[2] ; Rodrigues, Jorge L. M. ^{[1, 5]}

Affiliation

^[1] Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 - USA

^[2] Univ Sao Paulo, Ctr Nucl Energy Agr, Av Centenario 303, CP 96, BR-13400970 Piracicaba, SP - Brazil

^[3] Univ Sao Paulo, Luiz de Queiroz Sch Agr, Appl Ecol Grad Program, BR-13418900 Piracicaba, SP - Brazil

^[4] Santa Catarina State Univ, Dept Soils & Sustainabil, BR-89815630 Chapeco, SC - Brazil

^[5] Lawrence Berkeley Natl Lab, Environm Genom & Syst Biol Div, Berkeley, CA 94720 - USA

• Document type: Journal article
• Source: FEMS MICROBIOLOGY ECOLOGY; v. 93, n. 10 OCT 2017.
• Web of Science Citations: 12

Abstract

We evaluated the bacterial and archaeal community dynamics and assembly in soils under forest, grassland and no-till cropping, using a high-throughput shotgun metagenomics approach. No significant alterations in alpha diversity were observed among different land uses, but beta diversity in grassland was lower than that observed in forest and no-till soils. Grassland communities showed assembly that predominantly followed the neutral model, i.e. high homogenizing selection with moderate dispersion, leading to biotic homogenization. Both no-till and forest soil communities were found to have assembly that predominantly followed a niche model, i.e. low rates of dispersal and weak homogenizing selection, resulting in maintenance of higher beta diversity relative to grasslands, indicating niche specialization or variable selection. Taken together, our results indicate that the patterns of assembly and their governing processes are dependent on the land use employed after deforestation, with consequences for taxa turnover and microbial functional potential. (AU)

• FAPESP's process: 14/50320-4 - Dimensions US-BIOTA - São Paulo: collaborative research: integrating dimensions of microbial biodiversity across land use change in tropical forests
• Grantee: Tsai Siu Mui
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 08/58114-3 - Monitoring the microbial diversity and functional activities in response to land-use changes and deforestation under soybean and sugarcane cultivations
• Grantee: Tsai Siu Mui
• Support Opportunities: Research Program on Global Climate Change - Thematic Grants